Body Control Modules: Other Chrysler 300M I

MECHANICAL INSTRUMENT CLUSTER

Mechanical Instrument Cluster (MIC) includes a speedometer, tachometer, fuel gauge, oil pressure gauge, water temperature gauge, voltmeter, Vacuum Fluorescent (VF) display and a series of warning lights.

Body Control Module (BCM) sends signals necessary for MIC to position gauges. MIC receives these messages through the Programmable Communication Interface (PCI) multiplex system (bus), and translates them into gauge positions. BCM sends status of all indicator lights and dimming level to MIC over PCI bus when ignition switch is in RUN or START positions. Malfunction Indicator Light (MIL)/CHECK ENGINE light status is sent to BCM from Powertrain Control Module (PCM) over PCI bus. Vacuum Fluorescent (VF) odometer/trip display works when ignition switch is in RUN or START positions. BCM stores mileage information that odometer displays. If PCI bus is not functioning, odometer will display NO BUS instead of the mileage numbers. BCM sends mileage message and dimming level message to VF display when ignition switch is in the ACC position. All other MIC features work only when the ignition switch is in the RUN position.

MEMORY HEATED SEAT & MIRROR SYSTEM

The Memory Heated Seat/Mirror Module (MHSMM) mounted under driver seat, reads all seat switch, mirror switch and radio station preset inputs programmed by driver. Functionality includes memory preset capability for a second driver. Two stored sets of preferences can be recalled upon request.

The MHSMM monitors memory switches and stores desired positions in memory. MHSMM will activate seat and mirror motors in response to a recall request from individual memory switch or Remote Keyless Entry (RKE) transmitter.

OVERHEAD TRAVEL INFORMATION SYSTEM

The Overhead Travel Information System (OTIS) provides vehicle operator with supplementary information on a Vacuum Fluorescent (VF) display. The OTIS is located in overhead console. Vehicle operator selects and resets display functions through the use of 4 buttons (US/M, STEP, C/T and RESET). The OTIS obtains most of its information over the Programmable Communication Interface (PCI) multiplex system (bus).

The OTIS powers up when it senses battery voltage on the ignition switch input circuit. The OTIS blanks the display, then illuminates all segments of the VF display. During this time, the OTIS sends and receives information over the PCI bus to determine what to display after its 2-second initialization period. OTIS will display dashes (- - -) for any of the screens for which it did not receive PCI bus messages during the 2-second initialization period. Dashes will be replaced by valid information if and when it is received.

PCI BUS SYSTEM

The Programmable Communication Interface (PCI) multiplex system (bus) consists of a single wire. The PCI bus wire is primarily Violet/Yellow with an extra tracer color to help distinguish between different connections. The BCM acts as a splice to connect each module and DLC. Each module uses its local ground as bus reference. If more than one module is trying to access the PCI bus at one time, the code being sent determines which message has higher priority, and is then allowed to access bus first. Communication over the bus is essential to proper operation of vehicles on-board diagnostic systems and Diagnostic Readout Box (DRBIII(R)). Problems with operation of bus or DRBIII(R) must be corrected before proceeding with diagnostic testing.

VEHICLE THEFT SECURITY SYSTEM

Vehicle Theft Security System (VTSS) monitors vehicle doors, hood, trunk key cylinder and ignition for unauthorized operation/entry. When alarm is triggered, the horn will sound for 3 minutes and the parking lights will flash for 15-18 minutes.

When an unauthorized entry into vehicle occurs, the VTSS module signals Powertrain Control Module (PCM) through the Programmable Communication Interface (PCI) multiplex system (bus) that it is not okay to start the engine. The PCM then "zeros out" the pulse width of the fuel injectors, thus preventing the engine from starting (start/stall condition). The engine will NOT start until VTSS is disarmed.

PROGRAMMING

Note. Programming procedures are written specifically for Chrysler's Diagnostic Readout Box (DRBIII(R)) scan tool. A generic scan tool may not be capable of performing all necessary functions.

A/C CONTROL MODULE

If any repairs were made to heating and A/C system, disconnect negative battery cable or use scan tool to recalibrate HVAC doors.

Turn ignition on for at least 15 seconds (to learn VIN). On vehicles equipped with Vehicle Theft Security System (VTSS), use scan tool to enable VTSS. Following scan tool manufacturer instructions, program all other options as necessary.

MEMORY HEATED SEAT/MIRROR MODULE

Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, reset guard bands. Using memory set switch, reprogram both memory positions. Remove key from ignition switch. Close all doors. Wait 30 seconds. Verify both memory positions can be recalled.

POWERTRAIN CONTROL MODULE

Note. Sentry Key Immobilizer Module (SKIM) will only remain in secured access mode for 60 seconds. If incorrect unique Personal Identification Number (PIN) is entered 3 times, SKIM will be locked for one hour. To unlock SKIM, turn ignition on for one hour. When SKIM is locked, scan tool will display BUS +/- SIGNALS OPEN.

Note. If Powertrain Control Module (PCM) is replaced, the correct vehicle mileage and Vehicle Identification Number (VIN) must be programmed into PCM to prevent DTCs from being set in Controller Anti-Lock Brake (CAB) and Occupant Restraint Controller (ORC) module.

1. Obtain vehicle's unique Personal Identification Number (PIN) assigned to SKIM from vehicle owner or manufacturer. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, enter correct VIN and mileage into PCM. Go to next step.
2. Using scan tool, clear DTCs from CAB and ORC. Using scan tool, select SKIM REPLACEMENT. Enter 4-digit PIN to put SKIM in access mode. Using scan tool, transfer vehicle secret key data from SKIM to PCM. Go to next step.
3. Attempt to start engine. If engine does not start or stay running, repair by symptom. See appropriate TROUBLE SHOOTING - NO CODES article in ENGINE PERFORMANCE. If engine starts and stays running, and customer complaint cannot be duplicated, system is operating correctly. Repair is complete.

REMOTE KEYLESS ENTRY TRANSMITTER

If one Remote Keyless Entry (RKE) transmitter is already programmed, use customer learn method. See CUSTOMER LEARN METHOD . If no remote transmitters are programmed, use scan tool method. See SCAN TOOL METHOD .

Customer Learn Method

Place gear selector in PARK. Turn ignition on. Using a previously programmed transmitter, press UNLOCK button on transmitter for minimum of 4 seconds, and while still holding UNLOCK button, press PANIC button. Release both buttons within 10 seconds. BCM will chime. Press any button on each additional transmitter to be programmed. BCM will chime as each button is learned. To exit program mode, turn ignition off, or wait 32 seconds. BCM will chime again.

Memory Positions

Note. Memory Heated Seat and Mirror Module (MHSMM) communicates with Remote Keyless Entry (RKE) system through the PCI bus (Violet/Yellow wire). MHSMM settings can be programmed and recalled by RKE module.

Set seat and mirrors to desired position. Set desired radio station presets. Press set button on memory set switch. Press and release desired memory switch button (1 or 2). Press and release unlock button on desired RKE transmitter. Do not press any buttons for 10 seconds.

SENTRY KEYS

Note. Sentry Key Immobilizer Module (SKIM) will only remain in secured access mode for 60 seconds. If incorrect unique Personal Identification Number (PIN) is entered 3 times, SKIM will be locked for one hour. To unlock SKIM, turn ignition on for one hour. When SKIM is locked, scan tool will display BUS +/- SIGNALS OPEN.

If 2 sentry keys are already programmed, use customer learn method. See CUSTOMER LEARN METHOD . If no sentry keys are programmed, use scan tool method. See SCAN TOOL METHOD .

Note. If no sentry keys have been previously programmed, scan tool method must be used to program first 2 keys into system. See SCAN TOOL METHOD . Following steps must be completed in proper order. Sentry Key Immobilizer System (SKIS) will automatically exit CUSTOMER LEARN programming mode if time allotted is exceeded, or if 8 keys have already been programmed.

1. Obtain 2 programmed sentry keys from owner. Ensure new sentry key blank is cut before proceeding. Insert one valid sentry key into ignition. Turn ignition on.
2. After 3 seconds, but no more than 15 seconds, turn ignition off. Remove key. Insert second valid sentry key. Turn ignition on.
3. About 10 seconds after completion of step 2 , Vehicle Theft Security System (VTSS) LED indicator will flash and a single tone will be heard. This indicates system has entered customer learn programming mode.
4. Within 50 seconds, turn ignition off. Remove second valid sentry key. Insert blank sentry key. Turn ignition on. After about 10 seconds, a single tone will be heard. VTSS LED indicator will stop flashing and stay on for about 3 seconds to indicate sentry key has been successfully programmed.
5. SKIS will return to normal operation immediately following exit from customer learn programming mode. Repeat procedure for each additional sentry key to be programmed.

SENTRY KEY IMMOBILIZER MODULE

Note. SKIM will only remain in secured access mode for 60 seconds. If incorrect unique Personal Identification Number (PIN) is entered 3 times, SKIM will be locked for one hour. To unlock SKIM, turn ignition on for one hour. When SKIM is locked, scan tool will display BUS +/- SIGNALS OPEN.

1. Obtain vehicle's unique Personal Identification Number (PIN) assigned to SKIM from vehicle owner or manufacturer. Ensure ignition is off. Remove all test equipment and jumper wires. Connect any disconnected components. Go to next step.
2. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select SKIM REPLACEMENT. Enter 4-digit PIN to put SKIM in access mode. Go to next step.
3. Using scan tool, select THEFT ALARM, SKIM, MISCELLANEOUS, then select desired procedure and follow steps displayed on scan tool. If SKIM has been replaced, ensure all keys and remote transmitters to be used with vehicle are programmed into SKIM. See «SENTRY KEYS»(ref-37884-S16004000152001011000000) and «REMOTE KEYLESS ENTRY TRANSMITTER»(ref-37884-S32158010642001011000000) .

TRANSMISSION CONTROL MODULE

Turn ignition off. Connect scan tool to Data Link Connector (DLC). Start engine and let idle. Press and hold brake pedal down. Using scan tool, select TRANSMISSION, MISCELLANEOUS, then QUICK LEARN PROCEDURE. Follow steps displayed on scan tool to complete quick learn procedure.

CHIME SYSTEMS

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Chime Inoperative At All Times

Ensure all doors are closed. Turn ignition on. Using scan tool, actuate chime test. If chime does not sound, replace Body Control Module (BCM). If chime sounds, system is functioning properly at this time. Fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See WIRING DIAGRAMS . Check for other symptoms that may apply. See SYMPTOM IDENTIFICATION table under SELF-DIAGNOSTIC SYSTEM.

Chime Inoperative With Driver Seat Belt Unfastened

1. Turn ignition off. Disconnect driver seat belt switch connector. Turn all lights off. Close all doors. Measure resistance between ground and driver seat belt switch connector terminal No. 2, ground circuit (Black wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Black wire.
2. Turn ignition on. Measure voltage between ground and driver seat belt switch connector terminal No. 1, seat belt switch sense circuit (Light Green/Red wire). If voltage is more than 5.3 volts, go to next step. If voltage is 5.3 volts or less, go to step 4.
3. Check Light Green/Red wire between Body Control Module (BCM) connector C4 terminal No. 15 and driver seat belt switch connector terminal No.1 for short to voltage. (Scheme 8) If problem exists, repair wiring as necessary. If problem does not exist, replace BCM.
4. Turn ignition off. Connect driver seat belt switch connector. Connect scan tool to Data Link Connector (DLC). Ensure driver seat belt is unfastened. Turn ignition on. Using scan tool, select BODY, BODY COMPUTER then INPUT/OUTPUT. Read SEAT BELT SW status. If scan tool displays CLOSED, replace BCM. If scan tool displays OPEN, go to next step.
5. Turn ignition off. Disconnect driver seat belt switch connector. Connect a fused jumper wire between ground and driver seat belt switch connector terminal No. 1, seat belt switch sense circuit (Light Green/Red wire). Turn ignition on. Using scan tool, read SEAT BELT SW status. If scan tool displays OPEN, go to next step. If scan tool displays CLOSED, replace driver seat belt switch.
6. Turn ignition off. Disconnect BCM connector C4. Measure resistance of driver seat belt switch sense circuit (Light Green/Red wire) between driver seat belt switch connector terminal No. 2 and BCM connector C4 terminal No. 15. (Scheme 8) If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Light Green/Red wire.

Scheme 8

Chime Sounds With Driver Door Open (Ignition Key Removed)

1. Ensure all exterior lights are off. Remove key from ignition switch. Connect scan tool to Data Link Connector (DLC). Using scan tool, select BODY, BODY COMPUTER then INPUT/OUTPUT. Read KEY-IN IGNITION status. If scan tool displays OPEN, go to next step. If scan tool displays OPEN, replace Body Control Module (BCM).
2. Disconnect ignition switch connector. Using scan tool, read KEY-IN IGNITION status. If scan tool displays CLOSED, go to next step. If scan tool displays OPEN, replace ignition switch.
3. Disconnect BCM connector C2. Measure resistance between ground and BCM connector C2 terminal No. 24, key-in ignition switch sense circuit (Light Blue wire). (Scheme 8) If resistance is less than 100 ohms, repair short to ground in Light Blue wire. If resistance is 100 ohms or more, replace BCM.

Chime Sounds With Driver Seat Belt Fastened

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Fasten driver seat belt. Turn ignition on. Using scan tool, select BODY, BODY COMPUTER then INPUT/OUTPUT. If scan tool displays CLOSED, go to next step. If scan tool displays OPEN, replace Body Control Module (BCM).
2. Turn ignition off. Disconnect seat belt switch connector. Turn ignition on. Using scan tool, read SEAT BELT SW status. If scan tool displays CLOSED, go to next step. If scan tool displays OPEN, replace seat belt switch.
3. Turn ignition off. Disconnect BCM connector C4. Measure resistance between ground and BCM connector C4 terminal No. 15, seat belt switch sense circuit (Light Green/Red wire). (Scheme 8)If resistance is less than 100 ohms, repair short to ground in Light Green/Red wire. If resistance is 100 ohms or more, replace BCM.

COMMUNICATIONS SYSTEM

Note. For communication system wiring diagram, see DATA LINK CONNECTORS article in WIRING DIAGRAMS.

ATC Messages Not Received

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select BODY, then AUTOMATIC TEMP CONTROL. If scan tool communicates with Automatic Temperature Control (ATC) module, go to next step. If scan tool does not communicate with ATC module, perform «BUS +/- SIGNALS OPEN FROM AUTOMATIC TEMPERATURE CONTROL MODULE»(ref-37884-S13025613012001011500000) test.
2. Turn ignition off. Using scan tool, clear DTCs. Turn ignition on, and wait one minute. Using scan tool, retrieve DTCs. If ATC MESSAGES NOT RECEIVED DTC resets, replace Body Control Module (BCM). If ATC MESSAGES NOT RECEIVED DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Battery Power To Module Disconnected

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, clear DTCs. Turn ignition off, then on. Using scan tool, retrieve DTCs. If BATTERY POWER TO MODULE DISCONNECTED DTC resets, go to next step. If BATTERY POWER TO MODULE DISCONNECTED DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
2. Turn ignition off. Remove Body Control Module (BCM) from back of junction block. Turn ignition on. Using a 12-volt test light connected to ground, probe terminal No. 7 at BCM connector on back of junction block. (Scheme 9) If test light illuminates, replace BCM. If test light does not illuminate, go to next step.
3. Check operation of courtesy lights. If courtesy lights operate, replace junction block. If courtesy lights do not operate, go to next step.
4. Remove and inspect fuse No. 19 (10-amp) in junction block. If fuse is okay, go to next step. If fuse is open, repair power distribution circuit as necessary. See POWER DISTRIBUTION article in WIRING DIAGRAMS.
5. Check voltage to fuse No. 19 (10-amp) in junction block. If battery voltage exists, replace junction block. If battery voltage does not exist, repair power distribution circuit as necessary. See POWER DISTRIBUTION article in WIRING DIAGRAMS.

Scheme 9

EATX Bus Communication Failure

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with Transmission Control Module (TCM). If scan tool communicates with TCM, go to next step. If scan tool does not communicate with TCM, perform «NO RESPONSE FROM TRANSMISSION CONTROL MODULE OR BUS +/- SIGNALS OPEN»(ref-37884-S18222189142001011000000) test.
2. Turn ignition off. Using scan tool, clear DTCs. Turn ignition on, and wait one minute. Using scan tool, retrieve DTCs. If EATX BUS COMMUNICATION FAILURE DTC resets, replace Body Control Module (BCM). If EATX BUS COMMUNICATION FAILURE DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

EEPROM Checksum Failure

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, clear DTCs. Turn ignition off, then on. Using scan tool, retrieve DTCs. If EEPROM CHECKSUM FAILURE DTC resets, replace Body Control Module (BCM). If EEPROM CHECKSUM FAILURE DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See WIRING DIAGRAMS . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Head Status RX Failure

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Remove and inspect fuse No. 14 in junction block. If fuse is okay, go to step 3. If fuse is open, go to next step.
2. Replace fuse No. 14. Turn ignition on, then off. Remove and inspect fuse No. 14. If fuse is open, replace fuse and repair short to ground in Dark Blue/White wire between junction block and Mechanical Instrument Cluster (MIC). If fuse is okay, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
3. Ensure ignition is off. Install fuse No. 14. Remove Body Control Module (BCM) from back of junction block. Ensure all junction block connectors are completely connected. Go to next step.
4. Turn ignition on. Measure voltage on terminal No. 5 at BCM connector on back of junction block. (Scheme 9) If voltage is more than 10 volts, replace BCM. If voltage is 10 volts or less, replace junction block.

Internal Base/Prem Select Failure

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, clear DTCs. Turn ignition off, then on. Using scan tool, retrieve DTCs. If INTERNAL BASE/PREM SELECT FAILURE DTC resets, replace Body Control Module (BCM). If INTERNAL BASE/PREM SELECT FAILURE DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See WIRING DIAGRAMS . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

MHSMM Messages Not Received

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select BODY, then MEMORY SEAT MODULE. If scan tool communicates with Memory Heated Seat/Mirror Module (MHSMM), go to next step. If scan tool does not communicate with MHSMM, perform «BUS +/- SIGNALS OPEN FROM MEMORY HEATED SEAT/MIRROR MODULE»(ref-37884-S20922866872001011600000) test.
2. Using scan tool, clear DTCs. Turn ignition off. Turn ignition on, and wait one minute. Using scan tool, retrieve DTCs. If MHSMM MESSAGES NOT RECEIVED DTC resets, replace Body Control Module (BCM). If MHSMM MESSAGES NOT RECEIVED DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

MIC Messages Not Received

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select BODY, then ELECTRO/MECH CLUSTER. If scan tool communicates with Mechanical Instrument Cluster (MIC), go to next step. If scan tool does not communicate with MIC, perform «BUS +/- SIGNALS OPEN FROM INSTRUMENT CLUSTER»(ref-37884-S28746225992001011600000) test.
2. Using scan tool, clear DTCs. Turn ignition off. Turn ignition on, and wait one minute. Using scan tool, retrieve DTCs. If MIC MESSAGES NOT RECEIVED DTC resets, replace Body Control Module (BCM). If MIC MESSAGES NOT RECEIVED DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

No PCI Messages From CD Changer

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Turn radio on. Using scan tool, select BODY, then RADIO. If scan tool communicates with radio, go to next step. If scan tool does not communicate with radio, perform «NO RESPONSE FROM RADIO OR BUS +/- SIGNALS OPEN»(ref-37884-S40475570412001011000000) test.
2. Turn radio off. Turn ignition off. Disconnect CD changer DIN cable connector. Disconnect radio DIN cable Black connector C4. Visually inspect DIN cable connectors and connecting DIN cable for damage. Repair or replace as necessary. If connectors and cable appear okay, go to next step.
3. Check each DIN cable circuit between CD changer DIN cable connector and radio DIN cable Black connector C4 for an open circuit. If problem exists, replace DIN cable/connector assembly. If no problems exist, go to next step.
4. Check each DIN cable circuit between CD changer DIN cable connector and radio DIN cable Black connector C4 for a short circuit to DIN cable metal connectors. If problem exists, replace DIN cable/connector assembly. If no problems exist, go to next step.
5. Check each DIN cable circuit between CD changer DIN cable connector and radio DIN cable Black connector C4 for short circuit(s) to each other. If problem exists, replace DIN cable/connector assembly. If no problems exist, go to next step.
6. Connect Scope Input Cable (CH7058) to channel one connector on scan tool. Connect Red and Black leads and Cable-To-Probe Adapter (CH7062) to scope input cable. Go to next step.
7. Using scan tool, select DRB STANDALONE, LAB SCOPE, LIVE DATA, then 12-VOLT SQUARE WAVE. Press F2 for scope. Press F2 again and use down arrow to set voltage range to 20 volts. Press F2 again. Go to next step.
8. Reconnect radio DIN cable Black connector C4. Connect Black lead to chassis ground. Connect Red lead to CD changer DIN cable connector terminal No. 6, PCI bus circuit (Violet/Yellow wire). Turn ignition on. Turn radio on. Observe voltage display on scan tool lab scope. If voltage pulses from zero to about 7.5 volts, go to next step. If voltage remains at zero volts, replace radio.
9. Turn ignition off. Using a 12-volt test light connected to ground, probe CD changer DIN cable connector terminal No. 5, ignition switch output circuit (Red wire). Turn ignition on. If test light illuminates, go to next step. If test light does not illuminate, replace radio.
10. Turn ignition off. Using 12-volt test light connected to battery voltage, probe CD changer DIN cable connector terminal No. 2, ground circuit (Black/Yellow wire). If test light illuminates, replace CD changer. If test light does not illuminate, replace radio.

OTIS Messages Not Received

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with Overhead Travel Information System (OTIS) module. If scan tool communicates with OTIS module, go to next step. If scan tool does not communicate with OTIS module, perform «BUS +/- SIGNALS OPEN FROM OVERHEAD TRAVEL INFORMATION SYSTEM MODULE»(ref-37884-S16892850752001011000000) test.
2. Using scan tool, clear DTCs. Turn ignition off. Turn ignition on, and wait one minute. Using scan tool, retrieve DTCs. If OTIS MESSAGES NOT RECEIVED DTC resets, replace Body Control Module (BCM). If OTIS MESSAGES NOT RECEIVED DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Post Failure

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, clear DTCs. Turn ignition off, then on. Using scan tool, retrieve DTCs. If POST FAILURE DTC resets, replace BCM. If POST FAILURE DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See WIRING DIAGRAMS . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

PCM Bus Communication Failure

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Using scan tool, clear DTCs. Turn ignition on, and wait one minute. Using scan tool, retrieve DTCs. If PCM BUS COMMUNICATION FAILURE DTC resets, go to next step. If PCM BUS COMMUNICATION FAILURE DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
2. Using scan tool, select BODY COMPUTER, SYSTEM TESTS, then PCM MONITOR. If scan tool displays PCM IS ACTIVE ON BUS, replace Body Control Module (BCM). If scan tool does not display PCM IS ACTIVE ON BUS, go to next step.
3. Using scan tool, attempt to communicate with Powertrain Control Module (PCM). If scan tool communicates with PCM, go to next step. If scan tool does not communicate with PCM, perform «NO RESPONSE FROM POWERTRAIN CONTROL MODULE (PCI BUS)»(ref-37884-S31456202182001011000000) test.
4. Turn ignition off. Disconnect PCM Gray connector C2. Connect Scope Input Cable (CH7058) to channel one connector on scan tool. Connect Red and Black leads and Cable-To-Probe Adapter (CH7062) to scope input cable. Go to next step.
5. Using scan tool, select DRB STANDALONE, LAB SCOPE, LIVE DATA, then 12-VOLT SQUARE WAVE. Press F2 for scope. Press F2 again and use down arrow to set voltage range to 20 volts. Press F2 again. Go to next step.
6. Connect Black lead to chassis ground. Connect Red lead to PCM Gray connector C2 terminal No. 59, PCI bus circuit (Violet/Yellow wire). (Scheme 8)and (Scheme 11). Turn ignition on. Observe voltage display on scan tool lab scope. If voltage pulses from zero to about 7.5 volts, replace PCM. If voltage does not pulse from zero to about 7.5 volts, leave PCM Gray connector C2 disconnected, and go to next step.
7. Turn ignition off. Disconnect BCM connector C3. Measure resistance of PCI bus circuit (Violet/Yellow wire) between BCM connector C3 terminal No. 1 and PCM Gray connector C2 terminal No. 59. (Scheme 11) If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Violet/Yellow wire.

Scheme 10

SKIM Messages Not Received

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with Sentry Key Immobilizer Module (SKIM). If scan tool communicates with SKIM, go to next step. If scan tool does not communicate with SKIM, perform «BUS +/- SIGNAL OPEN FROM SENTRY KEY IMMOBILIZER MODULE»(ref-37884-S33538026182001011000000) test.
2. Using scan tool, clear DTCs. Turn ignition off. Turn ignition on, and wait one minute. Using scan tool, retrieve DTCs. If SKIM MESSAGES NOT RECEIVED DTC resets, replace Body Control Module (BCM). If SKIM MESSAGES NOT RECEIVED DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Bus +/- Signals Open From Automatic Temperature Control Module

Note. Automatic Temperature Control (ATC) module may also be referred to as ATC head.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select BODY, then BODY COMPUTER. If scan tool communicates with Body Control Module (BCM), go to next step. If scan tool does not communicate with BCM, perform «BUS +/- SIGNALS OPEN FROM BODY CONTROL MODULE»(ref-37884-S06574507812001011000000) test.
2. Turn ignition off. Disconnect Automatic Temperature Control (ATC) module connector. Turn ignition on. Using a 12-volt test light connected to ground, probe ATC module connector terminal No. 10, fused ignition switch output circuit (White wire). (Scheme 12) If test light illuminates, go to next step. If test light does not illuminate, repair open or short in White wire.
3. Turn ignition off. Measure resistance between ground and ATC module connector terminal No. 1, ground circuit (Black/Light Green wire), and between ground and ATC module connector terminal No. 3, ground circuit (Black wire). If resistance is less than 5 ohms on both circuit, leave ATC module connector disconnected, and go to next step. If resistance is 5 ohms or more on either circuit, repair open in Black/Light Green wire and/or Black wire.
4. Turn ignition off. Connect Scope Input Cable (CH7058) to channel one connector on scan tool. Connect Red and Black leads and Cable-To-Probe Adapter (CH7062) to scope input cable. Go to next step.
5. Using scan tool, select DRB STANDALONE, LAB SCOPE, LIVE DATA, then 12-VOLT SQUARE WAVE. Press F2 for scope. Press F2 again and use down arrow to set voltage range to 20 volts. Press F2 again. Go to next step.
6. Connect Black lead to chassis ground. Connect Red lead to ATC module connector terminal No. 2, PCI bus circuit (Violet/Yellow wire). Turn ignition on. Observe voltage display on scan tool lab scope. If voltage pulses from zero to about 7.5 volts, replace ATC module. If voltage does not pulse from zero to about 7.5 volts, leave ATC module connector disconnected, and go to next step.
7. Turn ignition off. Disconnect BCM connector C1. Measure resistance of PCI bus circuit (Violet/Yellow wire) between ATC module connector terminal No. 2 and BCM connector C1 terminal No. 4. (Scheme 8)and (Scheme 12). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Violet/Yellow wire.

Scheme 11

Bus +/- Signals Open From Body Control Module

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect junction block connector C2. (Scheme 9) Measure resistance between ground and junction block connector C2 terminal No. 8, ground circuit (Black/Orange wire). (Scheme 13) If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Black/Orange wire.
2. Disconnect junction block connector C3. Measure resistance between ground and junction block connector C3 terminal No. 4, ground circuit (Black/Light Green wire). (Scheme 14) If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Black/Light Green wire.
3. Ensure ignition is off. Remove Body Control Module (BCM) from back of junction block. Using a 12-volt test light connected to ground, probe terminal No. 7, fused B+ circuit at BCM connector on back of junction block. If test light illuminates, leave BCM removed, and go to next step. If test light does not illuminate, replace junction block.
4. Connect junction block connector C2. Measure resistance between ground and terminal No. 1, ground circuit at BCM connector on back of junction block. If resistance is less than 5 ohms, leave BCM removed, and go to next step. If resistance is 5 ohms or more, replace junction block.
5. Connect junction block connector C3. Measure resistance between ground and terminal No. 20, ground circuit at BCM connector on back of junction block. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, replace junction block.
6. Disconnect BCM connector C1. Measure resistance between ground and Data Link Connector (DLC) terminal No. 2, PCI bus circuit (Violet/Yellow wire). (Scheme 15) If resistance is more than 100 ohms, go to next step. If resistance is 100 ohms or less, repair short to ground in Violet/Yellow wire.
7. Turn ignition on. Measure voltage on DLC terminal No. 2, PCI bus circuit (Violet/Yellow wire). If voltage does not exist, go to next step. If voltage exists, repair short to voltage in Violet/Yellow wire.
8. Measure resistance in PCI bus circuit (Violet/Yellow wire) between DLC terminal No. 2 and BCM connector C1 terminal No. 14. (Scheme 8)and (Scheme 15). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Violet/Yellow wire.

Scheme 12

Scheme 13

Scheme 14

Bus +/- Signals Open From Instrument Cluster

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select BODY, then BODY COMPUTER. If scan tool communicates with Body Control Module (BCM), go to next step. If scan tool does not communicate with BCM, perform «BUS +/- SIGNALS OPEN FROM BODY CONTROL MODULE»(ref-37884-S06574507812001011000000) test.
2. Turn ignition off. Disconnect instrument cluster connector C1. Using a 12-volt test light connected to ground, probe instrument cluster connector C1 terminal No. 1, fused B+ circuit (Pink/Red wire). (Scheme 16) If test light illuminates, leave instrument cluster connector C1 disconnected, and go to next step. If test light does not illuminate, repair open or short in Pink/Red wire.
3. Turn ignition off. Disconnect instrument cluster connector C2. Measure resistance between ground and instrument cluster connector C1 terminal No. 6, ground circuit (Black/Light Green wire), and between ground and instrument cluster connector C2 terminal No. 6, ground circuit (Black wire). If resistance is less than 5 ohms on both circuits, leave instrument cluster connector C1 disconnected, and go to next step. If resistance is 5 ohms or more on either circuit, repair open in Black/Light Green wire and/or Black wire.
4. Turn ignition off. Connect Scope Input Cable (CH7058) to channel one connector on scan tool. Connect Red and Black leads and Cable-To-Probe Adapter (CH7062) to scope input cable. Go to next step.
5. Using scan tool, select DRB STANDALONE, LAB SCOPE, LIVE DATA, then 12-VOLT SQUARE WAVE. Press F2 for scope. Press F2 again and use down arrow to set voltage range to 20 volts. Press F2 again. Go to next step.
6. Connect Black lead to chassis ground. Connect Red lead to instrument cluster connector C1 terminal No. 5, PCI bus circuit (Violet/Yellow wire). Turn ignition on. Observe voltage display on scan tool lab scope. If voltage pulses from zero to about 7.5 volts, replace instrument cluster. If voltage does not pulse from zero to about 7.5 volts, leave instrument cluster connector C1 disconnected, and go to next step.
7. Turn ignition off. Disconnect BCM connector C1. Measure resistance of PCI bus circuit (Violet/Yellow wire) between instrument cluster connector C1 terminal No. 5 and BCM connector C1 terminal No. 13. (Scheme 8)and (Scheme 16). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Violet/Yellow wire.

Scheme 15

Bus +/- Signals Open From Memory Heated Seat/Mirror Module

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select BODY, then BODY COMPUTER. If scan tool communicates with Body Control Module (BCM), go to next step. If scan tool does not communicate with BCM, perform «BUS +/- SIGNALS OPEN FROM BODY CONTROL MODULE»(ref-37884-S06574507812001011000000) test.
2. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C4. Using a 12-volt test light connected to ground, probe MHSMM connector C4 terminal No. 2, fused B+ circuit (Red wire). (Scheme 17) If test light illuminates, leave MHSMM connector C4 disconnected, and go to step 4. If test light does not illuminate, leave MHSMM connector C4 disconnected, and go to next step.
3. Substitute a known-good Circuit Breaker No. 2 (CB 2) in junction block. Circuit breakers are identified on inside of left instrument panel end cap. Using 12-volt test light connected to ground, probe MHSMM connector C4 terminal No. 2, fused B+ circuit (Red wire). If test light illuminates, replace faulty circuit breaker No. 2. If test light does not illuminate, repair Red wire for open or short circuit.
4. Measure resistance between ground and MHSMM connector C4 terminal No. 1, ground circuit (Black wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Black wire.
5. Turn ignition off. Connect Scope Input Cable (CH7058) to channel one connector on scan tool. Connect Red and Black leads and Cable-To-Probe Adapter (CH7062) to scope input cable. Go to next step.
6. Using scan tool, select DRB STANDALONE, LAB SCOPE, LIVE DATA, then 12-VOLT SQUARE WAVE. Press F2 for scope. Press F2 again and use down arrow to set voltage range to 20 volts. Press F2 again. Go to next step.
7. Connect Black lead to chassis ground. Disconnect MHSMM connector C1. Connect Red lead to MHSMM connector C1 terminal No. 26, PCI bus circuit (Violet/Yellow wire). Turn ignition on. Observe voltage display on scan tool lab scope. If voltage pulses from zero to about 7.5 volts, replace MHSMM. If voltage does not pulse from zero to about 7.5 volts, go to next step.
8. Turn ignition off. Disconnect MHSMM connector C1. Disconnect BCM connector C4. Measure resistance of PCI bus circuit (Violet/Yellow wire) between MHSMM connector C1 terminal No. 26 and BCM connector C4 terminal No. 9. (Scheme 8)and (Scheme 17). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Violet/Yellow wire.

Scheme 16

Bus +/- Signals Open From Overhead Travel Information System Module

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select BODY, then BODY COMPUTER. If scan tool communicates with Body Control Module (BCM), go to next step. If scan tool does not communicate with BCM, perform «BUS +/- SIGNALS OPEN FROM BODY CONTROL MODULE»(ref-37884-S06574507812001011000000) test.
2. Turn ignition off. Disconnect Overhead Travel Information System (OTIS) module connector. Turn ignition on. Using a 12-volt test light connected to ground, probe OTIS module connector terminal No. 2, fused ignition switch output circuit (Dark Blue/White wire). (Scheme 18) If test light illuminates, leave OTIS module connector disconnected, and go to next step. If test light does not illuminate, repair Dark Blue/White wire as necessary.
3. Turn ignition off. Measure resistance between ground and OTIS module connector terminal No. 3, ground circuit (Black/Light Green wire). If resistance is less than 5 ohms, leave OTIS module connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Black/Light Green wire.
4. Turn ignition off. Connect Scope Input Cable (CH7058) to channel one connector on scan tool. Connect Red and Black leads and Cable-To-Probe Adapter (CH7062) to scope input cable. Go to next step.
5. Using scan tool, select DRB STANDALONE, LAB SCOPE, LIVE DATA, then 12-VOLT SQUARE WAVE. Press F2 for scope. Press F2 again and use down arrow to set voltage range to 20 volts. Press F2 again. Go to next step.
6. Connect Black lead to chassis ground. Connect Red lead to OTIS module connector terminal No. 5, PCI bus circuit (Violet/Yellow wire). Turn ignition on. Observe voltage display on scan tool lab scope. If voltage pulses from zero to about 7.5 volts, replace OTIS module. If voltage does not pulse from zero to about 7.5 volts, leave OTIS module connector disconnected, and go to next step.
7. Turn ignition off. Remove BCM from back of junction block. Measure resistance of PCI bus circuit (Violet/Yellow wire) between OTIS module connector terminal No. 5 and terminal No. 10 at BCM connector on back of junction block. (Scheme 9)and (Scheme 18). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Violet/Yellow wire.

Scheme 17

Bus +/- Signal Open From Sentry Key Immobilizer Module

Note. After making any repairs, perform SENTRY KEY IMMOBILIZER SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select BODY, then BODY COMPUTER. If scan tool communicates with Body Control Module (BCM), go to next step. If scan tool does not communicate with BCM, perform «BUS +/- SIGNALS OPEN FROM BODY CONTROL MODULE»(ref-37884-S06574507812001011000000) test.
2. Turn ignition off. Disconnect Sentry Key Immobilizer Module (SKIM) connector. Measure resistance between ground and SKIM connector terminal No. 5, ground circuit (Black/Light Green wire). (Scheme 19) If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Black/Light Green wire.
3. Turn ignition on. Using a 12-volt test light connected to ground, probe SKIM connector terminal No. 4, fused ignition switch output circuit (Dark Blue/White wire). If test light illuminates, leave SKIM connector disconnected, and go to next step. If test light does not illuminate, repair open in Dark Blue/White wire.
4. Using 12-volt test light connected to ground, probe SKIM connector terminal No. 6, fused B+ circuit (Pink wire). If test light illuminates, go to next step. If test light does not illuminate, repair open in Pink wire.
5. Turn ignition off. Connect Scope Input Cable (CH7058) to channel one connector on scan tool. Connect Red and Black leads and Cable-To-Probe Adapter (CH7062) to scope input cable. Go to next step.
6. Using scan tool, select DRB STANDALONE, LAB SCOPE, LIVE DATA, then 12-VOLT SQUARE WAVE. Press F2 for scope. Press F2 again and use down arrow to set voltage range to 20 volts. Press F2 again. Go to next step.
7. Connect Black lead to chassis ground. Connect Red lead to SKIM connector terminal No. 2, PCI bus circuit (Violet/Yellow wire). Turn ignition on. Observe voltage display on scan tool lab scope. If voltage pulses from zero to about 7.5 volts, replace SKIM. If voltage does not pulse from zero to about 7.5 volts, go to next step.
8. Turn ignition off. Disconnect SKIM connector. Disconnect BCM connector C1. Measure resistance of PCI bus circuit (Violet/Yellow wire) between SKIM connector terminal No. 2 and BCM connector C1 terminal No. 12. (Scheme 8)and (Scheme 19). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Violet/Yellow wire.

Scheme 18

No Response From Controller Anti-Lock Brake

Note. After making any repairs, perform ANTI-LOCK BRAKE SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select BODY, then BODY COMPUTER. If scan tool communicates with Body Control Module (BCM), go to next step. If scan tool does not communicate with BCM, perform «BUS +/- SIGNALS OPEN FROM BODY CONTROL MODULE»(ref-37884-S06574507812001011000000) test.
2. Turn ignition off. Remove and inspect fuse No. 17 (10-amp) in junction block. Fuses are identified on inside of left instrument panel end cap. If fuse is open, go to next step. If fuse is okay, install fuse, and go to step 4.
3. Install fuse No. 17. Turn ignition on. Remove and inspect fuse No. 17 (10-amp) in junction block. If fuse is open, repair fused ignition switch circuit (White/Violet wire) between Controller Anti-Lock Brake (CAB) connector terminal No. 23 and junction block. If fuse is okay, fault may be intermittent. Check fused ignition switch circuit for intermittent short to ground. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000).
4. Ensure ignition is off. Disconnect Controller Anti-Lock Brake (CAB) connector. Measure resistance between ground and CAB connector terminals No. 8 and 24, ground circuits (Black wires). (Scheme 20) If resistance is less than 5 ohms on both circuits, leave CAB connector disconnected, and go to next step. If resistance is 5 ohms or more on either circuit, repair open in Black wire(s).
5. Ensure fuse No. 17 is installed in junction block. Turn ignition on. Using a 12-volt test light connected to ground, probe CAB connector terminal No. 23, fused ignition switch output circuit (White/Violet wire). If test light illuminates, go to next step. If test light does not illuminate, repair open in White/Violet wire.
6. Turn ignition on. Using scan tool, attempt to communicate with other modules. If scan tool communicates with other modules, go to next step. If scan tool does not communicate with other modules, perform «PCI BUS COMMUNICATION FAILURE»(ref-37884-S22474156162001011000000) test.
7. Turn ignition off. Connect Scope Input Cable (CH7058) to channel one connector on scan tool. Connect Red and Black leads and Cable-To-Probe Adapter (CH7062) to scope input cable. Go to next step.
8. Using scan tool, select DRB STANDALONE, LAB SCOPE, LIVE DATA, then 12-VOLT SQUARE WAVE. Press F2 for scope. Press F2 again and use down arrow to set voltage range to 20 volts. Press F2 again. Go to next step.
9. Connect Black lead to chassis ground. Connect Red lead to CAB connector terminal No. 20, PCI bus circuit (Violet/Yellow wire). Turn ignition on. Observe voltage display on scan tool lab scope. If voltage pulses from zero to about 7.5 volts, replace CAB. If voltage does not pulse from zero to about 7.5 volts, leave CAB connector disconnected, and go to next step.
10. Turn ignition off. Disconnect BCM connector C3. Measure resistance of PCI bus circuit (Violet/Yellow wire) between BCM connector terminal No. 2 and CAB connector terminal No. 20. (Scheme 8)and (Scheme 20). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Violet/Yellow wire.

Scheme 19

No Response From Left Side Impact Air Bag Control Module

Note. After making any repairs, perform AIR BAG SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Note. Ensure battery is fully charged.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select PASSIVE RESTRAINTS, then AIRBAG. Using scan tool, retrieve DTCs. If scan tool displays LOSS OF IGNITION RUN/START, repair air bag system. For information on air bag DIAGNOSIS & TESTING or DISPOSAL PROCEDURES, see AIR BAG SERVICE & REPAIR MANUAL, DOMESTIC & IMPORTED MODELS. If scan tool does not display LOSS OF IGNITION RUN/START, go to next step.
2. Disconnect left Side Impact Air Bag Control Module (SIACM) connector. Measure resistance between ground and left SIACM connector terminals No. 5 and 6, ground circuits (Black/Light Green wires). (Scheme 18) If resistance is less than 5 ohms on both circuits, leave left SIACM connector disconnected, and go to next step. If resistance is 5 ohms or more on either circuit, repair open in Black/Light Green wire(s).
3. Turn ignition on, then reconnect battery. Measure voltage on left SIACM connector terminal No. 1, fused ignition switch output circuit (Light Green/Yellow wire). If voltage is more than 6 volts, leave left SIACM connector disconnected, and go to next step. If voltage is 6 volts or less, repair open in Light Green/Yellow wire.
4. Using scan tool, attempt to communicate with other modules. If scan tool communicates with other modules, go to next step. If scan tool does not communicate with other modules, perform «PCI BUS COMMUNICATION FAILURE»(ref-37884-S22474156162001011000000) test.
5. Connect Scope Input Cable (CH7058) to channel one connector on scan tool. Connect Red and Black leads and Cable-To-Probe Adapter (CH7062) to scope input cable. Go to next step.
6. Using scan tool, select DRB STANDALONE, LAB SCOPE, LIVE DATA, then 12-VOLT SQUARE WAVE. Press F2 for scope. Press F2 again and use down arrow to set voltage range to 20 volts. Press F2 again. Go to next step.
7. Connect Black lead to chassis ground. Connect Red lead to left SIACM connector terminal No. 2, PCI bus circuit (Violet/Yellow wire). Turn ignition on. Observe voltage display on scan tool lab scope. If voltage pulses from zero to about 7.5 volts, replace left SIACM. If voltage does not pulse from zero to about 7.5 volts, leave left SIACM connector disconnected, and go to next step.
8. Turn ignition off. Disconnect BCM connector C4. Measure resistance of PCI bus circuit (Violet/Yellow wire) between BCM connector C4 terminal No. 9 and left SIACM connector terminal No. 2. (Scheme 8)and (Scheme 18). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Violet/Yellow wire.

No Response From Occupant Restraint Controller

Note. After making any repairs, perform AIR BAG SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Disconnect Occupant Restraint Controller (ORC) connector. Measure resistance between ground and ORC connector terminal No. 16, ground circuit (Black/Light Green wire). (Scheme 21) If resistance is less than 5 ohms, leave ORC connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Black/Light Green wire.
2. Turn ignition on, then reconnect battery. Using a 12-volt test light connected to ground, probe ORC connector terminal No. 14, fused ignition switch output run/start circuit (Light Green/Yellow wire), then probe ORC connector terminal No. 15, fused ignition switch output run circuit (Dark Blue/Yellow wire). If test light illuminates at both terminals, leave ORC connector disconnected, and go to next step. If test light does not illuminate at either terminal, repair open in Dark Blue/Yellow wire and/or Light Green/Yellow wire, and replace fuses as necessary.
3. Using scan tool, attempt to communicate with other modules. If scan tool communicates with other modules, go to next step. If scan tool does not communicate with other modules, perform «PCI BUS COMMUNICATION FAILURE»(ref-37884-S22474156162001011000000) test.
4. Connect Scope Input Cable (CH7058) to channel one connector on scan tool. Connect Red and Black leads and Cable-To-Probe Adapter (CH7062) to scope input cable. Go to next step.
5. Using scan tool, select DRB STANDALONE, LAB SCOPE, LIVE DATA, then 12-VOLT SQUARE WAVE. Press F2 for scope. Press F2 again and use down arrow to set voltage range to 20 volts. Press F2 again. Go to next step.
6. Connect Black lead to chassis ground. Connect Red lead to ORC connector terminal No. 21, PCI bus circuit (Violet/Yellow wire). Turn ignition on. Observe voltage display on scan tool lab scope. If voltage pulses from zero to about 7.5 volts, replace ORC. If voltage does not pulse from zero to about 7.5 volts, leave ORC connector disconnected, and go to next step.
7. Turn ignition off. Disconnect BCM connector C4. Measure resistance of PCI bus circuit (Violet/Yellow wire) between BCM connector C1 terminal No. 11 and ORC connector terminal No. 21. (Scheme 8)and (Scheme 21). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Violet/Yellow wire.

Scheme 20

No Response From Powertrain Control Module (PCI Bus)

Note. After making any repairs, perform POWERTRAIN SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with Body Control Module (BCM), Controller Anti-Lock Brake (CAB), Mechanical Instrument Cluster (MIC), then Occupant Restraint Controller (ORC). If scan tool communicates with other modules, go to next step. If scan tool does not communicate with other modules, perform «PCI BUS COMMUNICATION FAILURE»(ref-37884-S22474156162001011000000) test.
2. Using scan tool, attempt to communicate with Powertrain Control Module (PCM). If scan tool communicates with PCM, go to next step. If scan tool does not communicate with PCM, but vehicle starts, perform «NO RESPONSE FROM POWERTRAIN CONTROL MODULE (SCI ONLY)»(ref-37884-S11393813122001012300000) test. If scan tool does not communicate with PCM, and vehicle does not start, perform NO RESPONSE FROM PCM WITH NO START CONDITION test in appropriate BASIC DIAGNOSTIC PROCEDURES article in ENGINE PERFORMANCE.
3. Turn ignition off. Disconnect PCM Gray connector C2. Connect Scope Input Cable (CH7058) to channel one connector on scan tool. Connect Red and Black leads and Cable-To-Probe Adapter (CH7062) to scope input cable. Go to next step.
4. Using scan tool, select DRB STANDALONE, LAB SCOPE, LIVE DATA, then 12-VOLT SQUARE WAVE. Press F2 for scope. Press F2 again and use down arrow to set voltage range to 20 volts. Press F2 again. Go to next step.
5. Connect Black lead to chassis ground. Connect Red lead to PCM Gray connector C2 terminal No. 59, PCI bus circuit (Violet/Yellow wire). (Scheme 11) Turn ignition on. Observe voltage display on scan tool lab scope. If voltage pulses from zero to about 7.5 volts, replace PCM. If voltage does not pulse from zero to about 7.5 volts, leave PCM Gray connector C2 disconnected, and go to next step.
6. Turn ignition off. Disconnect BCM connector C3. Measure resistance of PCI bus circuit (Violet/Yellow wire) between BCM connector C3 terminal No. 1 and PCM Gray connector C2 terminal No. 59. (Scheme 8)and (Scheme 11). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Violet/Yellow wire.

No Response From Powertrain Control Module (SCI Only)

Note. After making any repairs, perform POWERTRAIN SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Perform CHECKING POWERTRAIN CONTROL MODULE (PCM) POWER & GROUND CIRCUITS test under COMPUTERIZED ENGINE CONTROLS in appropriate SYSTEM & COMPONENT TESTING article. Repair power and/or circuit(s) as necessary. If power and ground circuits are okay, go to next step.
2. Turn ignition off. Disconnect PCM Gray connector C2. Disconnect scan tool from DLC. Measure resistance between ground and PCM Gray connector C2 terminal No. 65, SCI transmit circuit (Pink/Tan wire). (Scheme 11) If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, leave PCM Gray connector C2 disconnected, and go to step 4.
3. Ensure ignition is off. Disconnect Transmission Control Module (TCM) connector. Measure resistance between ground and TCM connector terminal No. 7, SCI transmit circuit (Pink/Tan wire). (Scheme 22) If resistance is less than 100 ohms, repair short to ground in Pink/Tan wire. If resistance is 100 ohms or more, replace TCM.
4. Measure resistance between ground and PCM Gray connector C2 terminal No. 75, SCI receive circuit (Light Green wire). If resistance is less than 100 ohms, repair short to ground in Light Green wire. If resistance is 100 ohms or more, leave PCM Gray connector C2 disconnected, and go to next step.
5. Measure resistance of SCI receive circuit (Light Green wire) between DLC terminal No. 6 and PCM Gray connector C2 terminal No. 75. (Scheme 11)and (Scheme 15). If resistance is less than 5 ohms, leave PCM Gray connector C2 disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Light Green wire.
6. Measure resistance of SCI transmit circuit (Pink/Tan Green wire) between DLC terminal No. 7 and PCM Gray connector C2 terminal No. 65. (Scheme 22) If resistance is less than 5 ohms, replace PCM. If resistance is 5 ohms or more, repair open in Pink/Tan wire.

Scheme 21

No Response From Radio Or Bus +/- Signals Open

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with Occupant Restraint Controller (ORC), then with Body Control Module (BCM). If scan tool communicates with either module, go to next step. If scan tool does not communicate with either module, perform «PCI BUS COMMUNICATION FAILURE»(ref-37884-S22474156162001011000000) test.
2. Turn ignition off. Remove and inspect fuse No. 4 (10-amp) in junction block. Fuses are identified on inside of left instrument panel end cap. If fuse is open, go to next step. If fuse is okay, go to step 6.
3. Replace fuse No. 4. Turn ignition on. Turn radio on. Turn ignition off. Remove and inspect fuse No. 4 in junction block. If fuse is open, go to next step. If fuse is okay, check for intermittent short to ground on fused ignition switch output circuit (Red wire) between fuse block and radio.
4. Replace fuse No. 4. Disconnect radio Gray connector C2. Turn ignition on, then off. Remove and inspect fuse No. 4 in junction block. If fuse is open, leave radio Gray connector C2 disconnected, and go to next step. If fuse is okay, replace radio.
5. Disconnect junction block connector C3. (Scheme 9) Measure resistance between ground and junction block connector C3 terminal No. 2, fused ignition switch output circuit (Red wire). If resistance is less than 100 ohms, repair short to ground in Red wire, and replace fuse No. 4. If resistance is 100 ohms or more, replace junction block and fuse No. 4.
6. Replace fuse No. 4. Disconnect radio Gray connector C2. Turn ignition on. Using a 12-volt test light connected to ground, probe radio Gray connector C2 terminal No. 6, fused ignition switch output circuit (Red wire). (Scheme 23) If test light illuminates, leave radio Gray connector C2 disconnected, and go to next step. If test light does not illuminate, repair open in Red wire.
7. Turn ignition off. Using 12-volt test light connected to ground, probe radio Gray connector C2 terminal No. 7, fused B+ circuit (Pink wire). If test light illuminates, go to next step. If test light does not illuminate, repair open in Pink wire.
8. Disconnect radio ground strap. Measure resistance between ground and radio ground strap. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair radio ground strap as necessary.
9. Using scan tool, attempt to communicate with other modules. If scan tool communicates with other modules, go to next step. If scan tool does not communicate with other modules, perform «PCI BUS COMMUNICATION FAILURE»(ref-37884-S22474156162001011000000) test.
10. Turn ignition off. Disconnect radio White connector C3. Connect Scope Input Cable (CH7058) to channel one connector on scan tool. Connect Red and Black leads and Cable-To-Probe Adapter (CH7062) to scope input cable. Go to next step.
11. Using scan tool, select DRB STANDALONE, LAB SCOPE, LIVE DATA, then 12-VOLT SQUARE WAVE. Press F2 for scope. Press F2 again and use down arrow to set voltage range to 20 volts. Press F2 again. Go to next step.
12. Connect Black lead to chassis ground. Connect Red lead to radio White connector C3 terminal No. 1, PCI bus circuit (Violet/Yellow wire). (Scheme 23) Turn ignition on. Observe voltage display on scan tool lab scope. If voltage pulses from zero to about 7.5 volts, replace radio. If voltage does not pulse from zero to about 7.5 volts, leave radio White connector C3 disconnected, and go to next step.
13. Turn ignition off. Disconnect BCM connector C1. Measure resistance of PCI bus circuit (Violet/Yellow wire) between BCM connector C1 terminal No. 5 and radio White connector C3 terminal No. 1. (Scheme 8)and (Scheme 23). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Violet/Yellow wire.

Scheme 22

No Response From Right Side Impact Air Bag Control Module

Note. After making any repairs, perform AIR BAG SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Note. Ensure battery is fully charged.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select PASSIVE RESTRAINTS, then AIRBAG. Using scan tool, retrieve DTCs. If scan tool displays LOSS OF IGNITION RUN/START, repair air bag system. For information on air bag DIAGNOSIS & TESTING or DISPOSAL PROCEDURES, see AIR BAG SERVICE & REPAIR MANUAL, DOMESTIC & IMPORTED MODELS. If scan tool does not display LOSS OF IGNITION RUN/START, go to next step.
2. Disconnect right Side Impact Air Bag Control Module (SIACM) connector. Measure resistance between ground and right SIACM connector terminal No. 6, ground circuit (Black/Light Green wire). (Scheme 24) If resistance is less than 5 ohms, leave right SIACM connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Black/Light Green wire.
3. Turn ignition on, then reconnect battery. Measure voltage on right SIACM connector terminal No. 1, fused ignition switch output circuit (Light Green/Yellow wire). If voltage is more than 6 volts, leave right SIACM connector disconnected, and go to next step. If voltage is 6 volts or less, repair open in Light Green/Yellow wire.
4. Using scan tool, attempt to communicate with other modules. If scan tool communicates with other modules, go to next step. If scan tool does not communicate with other modules, perform «PCI BUS COMMUNICATION FAILURE»(ref-37884-S22474156162001011000000) test.
5. Connect Scope Input Cable (CH7058) to channel one connector on scan tool. Connect Red and Black leads and Cable-To-Probe Adapter (CH7062) to scope input cable. Go to next step.
6. Using scan tool, select DRB STANDALONE, LAB SCOPE, LIVE DATA, then 12-VOLT SQUARE WAVE. Press F2 for scope. Press F2 again and use down arrow to set voltage range to 20 volts. Press F2 again. Go to next step.
7. Connect Black lead to chassis ground. Connect Red lead to right SIACM connector terminal No. 2, PCI bus circuit (Violet/Yellow wire). Turn ignition on. Observe voltage display on scan tool lab scope. If voltage pulses from zero to about 7.5 volts, replace right SIACM. If voltage does not pulse from zero to about 7.5 volts, leave right SIACM connector disconnected, and go to next step.
8. Turn ignition off. Disconnect BCM connector C4. Measure resistance of PCI bus circuit (Violet/Yellow wire) between BCM connector C4 terminal No. 9 and right SIACM connector terminal No. 2. (Scheme 8)and (Scheme 24). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Violet/Yellow wire.

Scheme 23

No Response From Transmission Control Module Or Bus +/- Signals Open

Note. After making any repairs, perform TRANSMISSION SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with Powertrain Control Module (PCM), then Body Control Module (BCM). If scan tool communicates with either module, go to next step. If scan tool does not communicate with either module, perform «PCI BUS COMMUNICATION FAILURE»(ref-37884-S22474156162001011000000) test.
2. Turn ignition off. Disconnect Transmission Control Module (TCM) connector. Turn ignition on. Using a 12-volt test light connected to ground, probe TCM connector terminal No. 11, fused ignition switch output start/run circuit (Red/White wire). (Scheme 22) If test light illuminates brightly, leave TCM connector disconnected, and go to next step. If test light does not illuminate brightly, repair open in Red/White wire.
3. Remove engine starter motor relay in Power Distribution Center (PDC). (Scheme 25) Using 12-volt test light connected to ground, probe TCM connector terminal No. 8, fused ignition switch output start circuit (Yellow wire). Observe test light while momentarily turning ignition switch to start position. If test light illuminates brightly, leave TCM connector disconnected, and go to next step. If test light does not illuminate brightly, repair open in Yellow wire, and install engine starter motor relay.
4. Install engine starter motor relay. Using 12-volt test light connected to ground, probe TCM connector terminal No. 56, fused B+ circuit (Red/Light Blue wire). If test light illuminates brightly, leave TCM connector disconnected, and go to next step. If test light does not illuminate brightly, repair open in Red/Light Blue wire.
5. Using 12-volt test light connected to battery voltage, probe TCM connector terminal No. 53, ground circuit (Black/Yellow wire) and No. 57, ground circuit (Black/Red wire). If test light illuminates brightly at both circuits, leave TCM connector disconnected, and go to next step. If test light does not illuminate brightly at either circuit, repair open in Black/Yellow wire and/or Black/Red wire(s).
6. Using scan tool, attempt to communicate with other modules. If scan tool communicates with other modules, go to next step. If scan tool does not communicate with other modules, perform «PCI BUS COMMUNICATION FAILURE»(ref-37884-S22474156162001011000000) test.
7. Connect Scope Input Cable (CH7058) to channel one connector on scan tool. Connect Red and Black leads and Cable-To-Probe Adapter (CH7062) to scope input cable. Go to next step.
8. Using scan tool, select DRB STANDALONE, LAB SCOPE, LIVE DATA, then 12-VOLT SQUARE WAVE. Press F2 for scope. Press F2 again and use down arrow to set voltage range to 20 volts. Press F2 again. Go to next step.
9. Connect Black lead to chassis ground. Connect Red lead to TCM connector terminal No. 43, PCI bus circuit (Violet/Yellow wire). Turn ignition on. Observe voltage display on scan tool lab scope. If voltage pulses from zero to about 7.5 volts, replace TCM. If voltage does not pulse from zero to about 7.5 volts, leave TCM connector disconnected, and go to next step.
10. Turn ignition off. Disconnect BCM connector C3. Measure resistance of PCI bus circuit (Violet/Yellow wire) between BCM connector C3 terminal No. 7 and TCM connector terminal No. 43. (Scheme 8)and (Scheme 22). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Violet/Yellow wire.

Scheme 24

Odometer Displays NO BUS

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Attempt to start engine. If engine starts and runs, go to next step. If engine does not start and run, perform «PCI BUS COMMUNICATION FAILURE»(ref-37884-S22474156162001011000000) test.
2. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Using scan tool, attempt to communicate with Transmission Control Module (TCM), then Body Control Module (BCM). If scan tool communicates with both modules, go to next step. If scan tool does not communicate with both modules, perform «NO RESPONSE FROM TRANSMISSION CONTROL MODULE OR BUS +/- SIGNALS OPEN»(ref-37884-S18222189142001011000000) and/or «BUS +/- SIGNALS OPEN FROM BODY CONTROL MODULE»(ref-37884-S06574507812001011000000) test(s).
3. Using scan tool, attempt to communicate with instrument cluster. If scan tool communicates with instrument cluster, replace instrument cluster. If scan tool does not communicate with instrument cluster, perform «MIC MESSAGES NOT RECEIVED»(ref-37884-S11120712592001011000000) test.

PCI Bus Communication Failure

Note. Determine which modules this vehicle is equipped with before proceeding.

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with the following modules (if equipped). Body Control Module (BCM) Mechanical Instrument Cluster (MIC) Module Occupant Restraint Controller (ORC) Controller Anti-Lock Brake (CAB) If scan tool communicates with any of these modules, go to next step. If scan tool does not communicate with any of these modules, go to step 3.
2. Turn ignition off. If scan tool is unable to communicate with specific modules, perform related NO RESPONSE symptom test. See «SYMPTOM IDENTIFICATION»(ref-37884-S39909830572001011000000) table under SELF-DIAGNOSTIC SYSTEM. If scan tool communicates with all modules, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
3. Turn ignition off. Disconnect BCM connector C1. Measure resistance of PCI bus circuit (Violet/Yellow wire) between DLC terminal No. 2 and BCM connector C1 terminal No. 14. (Scheme 8)and (Scheme 15). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Violet/Yellow wire.
4. Ensure BCM connector C1 is reconnected. Turn ignition on. Measure voltage on DLC terminal No. 2, PCI bus circuit (Violet/Yellow wire). If voltage is more than 4 volts, go to next step. If voltage is 4 volts or less, go to step 7.
5. Turn ignition off. Disconnect BCM connectors and remove BCM from back of junction block. Turn ignition on. Measure voltage on each PCI bus terminal (Violet/Yellow wire) at appropriate BCM connector. See «PCI BUS COMPONENT/MODULE IDENTIFICATION»(ref-37884-S30785856992001011000000) table. (Scheme 8)and (Scheme 9). If voltage remains steadily more than 4 volts at any terminal, go to next step. If voltage does not remain steadily more than 4 volts at any terminal, replace BCM. PCI BUS COMPONENT/MODULE IDENTIFICATION BCM Connector Terminal No. Component/Module Back Of Junction Block (1) 10 Overhead Travel Information System Module C1 (2) 4 Automatic Temperature Control Module 5 Radio 11 Occupant Restraint Controller 12 Sentry Key Immobilizer Module 13 Mechanical Instrument Cluster 14 Data Link Connector C3 (2) 1 Powertrain Control Module 2 Controller Anti-Lock Brake 7 Transmission Control Module C4 (2) 9 Memory Heated Seat/Mirror Module & Side Impact Air Bag Control Modules (1) (Scheme 9) (2) (Scheme 8)
6. Turn ignition off. Disconnect appropriate connectors at component(s) and/or module(s) for PCI bus circuit (Violet/Yellow wire) that voltage existed on in step 5. Turn ignition on. Measure voltage on appropriate terminal(s) at appropriate BCM connector. See «PCI BUS COMPONENT/MODULE IDENTIFICATION»(ref-37884-S30785856992001011000000) table. If voltage is steadily more than 4 volts with component/module connector(s) disconnected, repair short to voltage in appropriate wire. If voltage is not steadily more than 4 volts with component/module connector(s) disconnected, replace appropriate module(s).
7. Turn ignition off. Disconnect negative battery cable. Disconnect BCM connectors and remove BCM from back of junction block. Measure resistance between ground and each PCI bus terminal (Violet/Yellow wire) at appropriate BCM connector. See «PCI BUS COMPONENT/MODULE IDENTIFICATION»(ref-37884-S30785856992001011000000) table. (Scheme 8)and (Scheme 9). If resistance is less than 5 ohms at any terminal, leave negative battery cable disconnected, and go to next step. If resistance is 5 ohms or more at all terminals, replace BCM.
8. Disconnect appropriate connectors at component(s) and/or module(s) for PCI bus circuit (Violet/Yellow wire) on which resistance is 5 ohms or less in step 7. Measure resistance between ground and appropriate terminal(s) at appropriate BCM connector. See «PCI BUS COMPONENT/MODULE IDENTIFICATION»(ref-37884-S30785856992001011000000) table. If resistance is less than 100 ohms with component/module connector(s) disconnected, repair short to ground in appropriate wire. If resistance is 100 ohms or more with component/module connector(s) disconnected, replace appropriate module(s).

DOOR AJAR SYSTEM

Driver Door Ajar CKT Open

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect driver door lock motor/ajar switch connector. Using a 12-volt test light connected to battery voltage, probe driver door lock motor/ajar switch connector terminal No. 2, ground circuit (Black wire). (Scheme 26) If test light illuminates, leave driver door lock motor/ajar switch connector disconnected, and go to next step. If test light does not illuminate, repair open in Black wire.
2. Disconnect Body Control Module (BCM) connector C4. Measure resistance of driver door ajar switch sense circuit (Tan wire) between BCM connector C4 terminal No. 4 and driver door lock motor/ajar switch connector terminal No. 1. (Scheme 8) If resistance is less than 5 ohms, leave driver door lock motor/ajar switch connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Tan wire.
3. Ensure BCM connectors are properly connected. Connect a jumper wire between driver door lock motor/ajar switch connector terminals No. 1, driver door ajar switch sense circuit (Tan wire) and No. 2, ground circuit (Black wire). Ensure ignition is off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select INPUTS/OUTPUTS, then read DR DOOR AJAR SW status. If scan tool displays CLOSED, replace driver door lock motor/ajar switch. If scan tool displays OPEN, replace BCM.

Scheme 25

Driver Door Ajar CKT STG

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect Body Control Module (BCM) connector C4. Disconnect driver door lock motor/ajar switch connector. Using a 12-volt test light connected to battery voltage, probe BCM connector C4 terminal No. 4, driver door ajar switch sense circuit (Tan wire). (Scheme 8) If test light illuminates, repair short to ground in Tan wire. If test light does not illuminate, leave driver door lock motor/ajar switch connector disconnected, and go to next step.
2. Ensure BCM connectors are properly connected. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select INPUTS/OUTPUTS, then read DR DOOR AJAR SW status. Connect, then disconnect driver door lock motor/ajar switch connector. If scan tool display switches from CLOSED to OPEN, replace driver door lock motor/ajar switch. If scan tool display does not switch from CLOSED to OPEN, replace BCM.

Left Rear Door Ajar CKT Open

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect left rear door lock motor/ajar switch connector. Using a 12-volt test light connected to battery voltage, probe left rear door lock motor/ajar switch connector terminal No. 2, ground circuit (Black wire). (Scheme 27) If test light illuminates, leave left rear door lock motor/ajar switch connector disconnected, and go to next step. If test light does not illuminate, repair open in Black wire.
2. Disconnect Body Control Module (BCM) connector C4. Measure resistance of left rear door ajar switch sense circuit (Tan/Red wire) between BCM connector C4 terminal No. 1 and left rear door lock motor/ajar switch connector terminal No. 1. (Scheme 8) If resistance is less than 5 ohms, leave BCM connector C4 disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Tan/Red wire.
3. Ensure left rear door lock motor/ajar switch connector is properly connected. Using a 12-volt test light connected to battery voltage, probe BCM connector C4 terminal No. 1, left rear door ajar switch sense circuit (Tan/Red wire). Open left rear door. If test light illuminates with left rear door open, replace BCM. If test light does not illuminate with left rear door open, replace left rear door lock motor/ajar switch.

Scheme 26

Left Rear Door Ajar CKT STG

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect Body Control Module (BCM) connector C4. Disconnect left rear door lock motor/ajar switch connector. Using a 12-volt test light connected to battery voltage, probe BCM connector C4 terminal No. 1, left rear door ajar switch sense circuit (Tan/Red wire). (Scheme 8) If test light illuminates, repair short to ground in Tan/Red wire. If test light does not illuminate, leave left rear door lock motor/ajar switch connector disconnected, and go to next step.
2. Ensure BCM connectors are properly connected. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select INPUTS/OUTPUTS, then read LR DOOR AJAR SW status. Connect, then disconnect left rear door lock motor/ajar switch connector. If scan tool display switches from CLOSED to OPEN, replace left rear door lock motor/ajar switch. If scan tool display does not switch from CLOSED to OPEN, replace BCM.

Pass Door Ajar CKT Open

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect passenger door lock motor/ajar switch connector. Using a 12-volt test light connected to battery voltage, probe passenger door lock motor/ajar switch connector terminal No. 2, ground circuit (Black wire). (Scheme 28) If test light illuminates, leave passenger door lock motor/ajar switch connector disconnected, and go to next step. If test light does not illuminate, repair open in Black wire.
2. Disconnect Body Control Module (BCM) connector C4. Measure resistance of passenger door ajar switch sense circuit (Tan/Red wire) between BCM connector C4 terminal No. 2 and passenger door lock motor/ajar switch connector terminal No. 1. (Scheme 8) If resistance is less than 5 ohms, leave passenger door lock motor/ajar switch connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Tan/Red wire.
3. Ensure BCM connectors are properly connected. Connect a jumper wire between passenger door lock motor/ajar switch connector terminals No. 1, passenger door ajar switch sense circuit (Tan/Red wire) and No. 2, ground circuit (Black wire). Ensure ignition is off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select INPUTS/OUTPUTS, then read PASS DOOR AJAR SW status. If scan tool displays CLOSED, replace passenger door lock motor/ajar switch. If scan tool displays OPEN, replace BCM.

Scheme 27

Pass Door Ajar CKT STG

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect Body Control Module (BCM) connector C4. Disconnect passenger door lock motor/ajar switch connector. Using a 12-volt test light connected to battery voltage, probe BCM connector C4 terminal No. 2, passenger door ajar switch sense circuit (Tan/Red wire). (Scheme 8) If test light illuminates, repair short to ground in Tan/Red wire. If test light does not illuminate, leave passenger door lock motor/ajar switch connector disconnected, and go to next step.
2. Ensure BCM connectors are properly connected. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select INPUTS/OUTPUTS, then read PASS DOOR AJAR SW status. Connect, then disconnect passenger door lock motor/ajar switch connector. If scan tool display switches from CLOSED to OPEN, replace passenger door lock motor/ajar switch. If scan tool display does not switch from CLOSED to OPEN, replace BCM.

Right Rear Door Ajar CKT Open

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect right rear door lock motor/ajar switch connector. Using a 12-volt test light connected to battery voltage, probe right rear door lock motor/ajar switch connector terminal No. 2, ground circuit (Black wire). (Scheme 27) If test light illuminates, leave right rear door lock motor/ajar switch connector disconnected, and go to next step. If test light does not illuminate, repair open in Black wire.
2. Disconnect Body Control Module (BCM) connector C4. Measure resistance of right rear door ajar switch sense circuit (Tan/Red wire) between BCM connector C4 terminal No. 10 and right rear door lock motor/ajar switch connector terminal No. 1. (Scheme 8) If resistance is less than 5 ohms, leave right rear door lock motor/ajar switch connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Tan/Red wire.
3. Ensure BCM connectors are properly connected. Using a 12-volt test light connected to battery voltage, probe right rear door lock motor/ajar switch connector terminal No. 1, right rear door ajar switch sense circuit (Tan/Red wire). Open right rear door. If test light illuminates with right rear door open, replace BCM. If test light does not illuminate with right rear door open, replace right rear door lock motor/ajar switch.

Right Rear Door Ajar CKT STG

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect Body Control Module (BCM) connector C4. Disconnect right rear door lock motor/ajar switch connector. Using a 12-volt test light connected to battery voltage, probe BCM connector C4 terminal No. 10, right rear door ajar switch sense circuit (Tan/Red wire). (Scheme 8) If test light illuminates, repair short to ground in Tan/Red wire. If test light does not illuminate, leave right rear door lock motor/ajar switch connector disconnected, and go to next step.
2. Ensure BCM connectors are properly connected. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select INPUTS/OUTPUTS, then read RR DOOR AJAR SW status. Connect, then disconnect right rear door lock motor/ajar switch connector. If scan tool display switches from CLOSED to OPEN, replace right rear door lock motor/ajar switch. If scan tool display does not switch from CLOSED to OPEN, replace BCM.

ELECTRICALLY HEATED SYSTEMS

Note. For electrically heated systems wiring diagrams, see WIRING DIAGRAMS in REAR WINDOW DEFOGGERS & HEATED MIRRORS and/or POWER SEATS articles.

Driver Heated Seat Switch Open/Shorted To Ground

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select BODY MEMORY SEAT MODULE, then retrieve DTCs. If any Memory Heated Seat/Mirror Module (MHSMM) DTCs are present, go to next step. If no MHSMM DTCs are present, go to step 3.
2. Using scan tool, clear MHSMM DTCs. Start engine and allow it to run for one minute while operating heated seat switch. Using scan tool retrieve MHSMM DTCs. If DRIVER HEATED SEAT SWITCH OPEN/SHORTED TO GROUND DTC resets, go to step 4. If DRIVER HEATED SEAT SWITCH OPEN/SHORTED TO GROUND DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
3. Turn ignition off. Disconnect driver heated seat switch connector. Turn ignition on. Measure voltage on driver heated seat switch connector terminal No. 4, fused ignition switch output circuit (Dark Blue/White wire). (Scheme 29) If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open in Dark Blue/White wire.
4. Turn ignition off. Disconnect MHSMM connector C1. Turn ignition on. Measure voltage on MHSMM connector C1 terminal No. 18, driver seat heater switch MUX circuit (Tan/Dark Green wire). (Scheme 17) If voltage is more than 10 volts, replace MHSMM. If voltage is 10 volts or less, leave MHSMM connector C1 disconnected, and go to next step.
5. Turn ignition off. Disconnect driver heated seat switch connector. Measure resistance of driver seat heater switch MUX circuit (Tan/Dark Green wire) between driver heated seat switch connector terminal No. 6 and MHSMM connector C1 terminal No. 18. If resistance is less than 5 ohms, leave connectors disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Tan/Dark Green wire.
6. Measure resistance between ground and MHSMM connector C1 terminal No. 18, driver seat heater switch MUX circuit (Tan/Dark Green wire). If resistance is less than 100 ohms, repair short to ground in Tan/Dark Green wire. If resistance is 100 ohms or more, replace driver heated seat switch.

Scheme 28

Driver Heated Seat Switch Stuck In High Status

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect driver heated seat switch connector. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select BODY MEMORY SEAT MODULE, then clear DTCs. Turn ignition off, then on. Using scan tool, retrieve DTCs. If DRIVER HEATED SEAT SWITCH OPEN/SHORTED TO GROUND DTC is retrieved, replace driver heated seat switch. If DRIVER HEATED SEAT SWITCH OPEN/SHORTED TO GROUND DTC is not retrieved, leave driver heated seat switch connector disconnected, and go to next step.
2. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Turn ignition on. Measure voltage between ground and MHSMM connector C1 terminal No. 18, driver seat heater switch MUX circuit (Tan/Dark Green wire). (Scheme 17) If no voltage exists, replace MHSMM. If any voltage exists, repair short to voltage in Tan/Dark Green wire.

Driver Heated Seat Switch Stuck In Low Status

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect driver heated seat switch connector. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select BODY MEMORY SEAT MODULE, then clear DTCs. Turn ignition off, then on. Using scan tool, retrieve DTCs. If DRIVER HEATED SEAT SWITCH OPEN/SHORTED TO GROUND DTC is retrieved, replace driver heated seat switch. If DRIVER HEATED SEAT SWITCH OPEN/SHORTED TO GROUND DTC is not retrieved, leave driver heated seat switch connector disconnected, and go to next step.
2. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Turn ignition on. Measure voltage between ground and MHSMM connector C1 terminal No. 18, driver seat heater switch MUX circuit (Tan/Dark Green wire). (Scheme 17) If no voltage exists, replace MHSMM. If any voltage exists, repair short to voltage in Tan/Dark Green wire.

Driver Seat Heat Output Open

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition on. Raise driver seat to highest position to gain access to seat components and connectors. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C3. Measure resistance between ground and MHSMM connector C3 terminal No. 12, driver seat heater B+ driver circuit (Red/Dark Green wire). (Scheme 17) If resistance is less than 8.5 ohms, replace MHSMM. If resistance is 8.5 ohms or more, leave MHSMM connector C3 disconnected, and go to next step.
2. Disconnect driver heated seat cushion 4-pin connector. Measure resistance of driver seat heater B+ driver circuit (Red/Dark Green wire) between driver heated seat cushion 4-pin connector terminal "A" and MHSMM connector C3 terminal No. 12. (Scheme 30) If resistance is less than 5 ohms, leave driver heated seat cushion 4-pin connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Red/Dark Green wire.
3. Disconnect driver heated seat back cushion 2-pin connector. Measure resistance of heated seat driver circuit (Brown/Black wire) between driver heated seat cushion 4-pin connector terminal "B" and driver heated seat back cushion 2-pin connector terminal "A". If resistance is less than 5 ohms, leave driver heated seat back cushion 2-pin connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Brown/Black wire.
4. Measure resistance between ground and driver heated seat back cushion 2-pin connector terminal "B", ground circuit (Black wire). If resistance is less than 5 ohms, go to next step. If resistance 5 ohms or more, repair open in Black wire.
5. Disconnect driver heated seat cushion 4-pin connector. Measure resistance between driver heated seat cushion connector (component side) terminal "A", driver seat heater B+ driver circuit and terminal "B", heated seat driver circuit. (Scheme 31) If resistance is less than 2.5 ohms, go to next step. If resistance is 2.5 ohms or more, replace driver heated seat cushion.
6. Disconnect driver heated seat back cushion 2-pin connector. Measure resistance between driver heated seat back cushion connector (component side) terminal "A", heated seat driver circuit and terminal "B", ground circuit. (Scheme 32) If resistance is 2 ohms or more, replace driver heated seat back cushion. If resistance is less than 2 ohms, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Scheme 29

Scheme 30

Scheme 31

Driver Seat Heat Output Short To GND

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition on. Raise driver seat to highest position to gain access to seat components and connectors. Turn ignition off. Disconnect driver heated seat cushion 4-pin connector. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select BODY MEMORY SEAT MODULE, then clear DTCs. Turn ignition off for 20 seconds. Turn ignition on. Using scan tool, retrieve DTCs. If DRIVER SEAT HEAT OUTPUT SHORT TO GND DTC resets, leave driver heated seat cushion 4-pin connector disconnected, and go to next step. If DRIVER SEAT HEAT OUTPUT SHORT TO GND DTC does not reset, leave driver heated seat cushion 4-pin connector disconnected, and go to step 3.
2. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C3. Measure resistance between ground and MHSMM connector C3 terminal No. 12, driver seat heater B+ driver circuit (Red/Dark Green wire). (Scheme 17) If resistance is less than 100 ohms, repair short to ground in Red/Dark Green wire. If resistance is 100 ohms or more, replace MHSMM.
3. Measure resistance between ground and driver heated seat cushion connector (component side) terminal "A", driver seat heater B+ circuit. (Scheme 31) If resistance is less than 5 ohms, replace driver heated seat cushion. If resistance is 5 ohms or more, leave driver heated seat cushion 4-pin connector disconnected, and go to next step.
4. Disconnect driver heated seat back cushion 2-pin connector. Measure resistance between ground and driver heated seat back cushion 2-pin connector terminal "A", heated seat driver circuit (Brown/Black wire). (Scheme 33) If resistance is less than 100 ohms, repair short to ground in Brown/Black wire. If resistance is 100 ohms or more, leave driver heated seat back 2-pin connector disconnected, and go to next step.
5. Connect driver heated seat cushion 4-pin connector. Measure resistance between ground and driver heated seat back cushion 2-pin connector terminal "A", heated seat driver circuit (Brown/Black wire). If resistance is less than 5 ohms, replace driver heated seat back cushion. If resistance is 5 ohms or more, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Scheme 32

Driver Thermistor Out Of Range High

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition on. Raise driver seat to highest position to gain access to seat components and connectors. Turn ignition off. Disconnect driver heated seat cushion 4-pin connector. Turn ignition on. Turn driver heated seat switch on. Measure voltage between ground and driver heated seat cushion 4-pin connector terminal "D", driver seat temperature 5-volt supply circuit (Black/Dark Green wire). (Scheme 30) If voltage is more than 5.5 volts, leave driver heated seat cushion 4-pin connector disconnected, and go to next step. If voltage is 5.5 volts or less, leave driver heated seat cushion 4-pin connector disconnected, and go to step 3.
2. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C2. Turn ignition on. Measure voltage between ground and driver heated seat cushion connector (component side) terminal "D", driver seat temperature 5-volt supply circuit. (Scheme 31). If any voltage exists, repair short to voltage in driver seat temperature 5-volt supply circuit. If no voltage exists, replace MHSMM.
3. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Turn ignition on. Measure voltage between ground and driver heated seat cushion 4-pin connector terminal "C", driver seat temperature sensor input circuit (Tan/Light Blue wire). If any voltage exists, repair short to voltage in Tan/Light Blue wire. If no voltage exists, replace driver heated seat cushion.

Driver Thermistor Out Of Range Low

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition on. Raise driver seat to highest position to gain access to seat components and connectors. Turn ignition off. Disconnect driver heated seat cushion 4-pin connector. Turn ignition on. Turn driver heated seat switch on. Measure voltage between ground and driver heated seat cushion 4-pin connector terminal "D", driver seat temperature 5-volt supply circuit (Black/Dark Green wire). (Scheme 30) If voltage is 4.5 volts or more, leave driver heated seat cushion 4-pin connector disconnected, and go to next step. If voltage is less than 4.5 volts, leave driver heated seat cushion 4-pin connector disconnected, and go to step 6.
2. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Measure resistance of driver seat temperature sensor input circuit (Tan/Light Blue wire) between driver heated seat cushion connector terminal "C" and MHSMM connector C1 terminal No. 4. (Scheme 17)and (Scheme 30). If resistance is less than 5 ohms, leave driver heated seat cushion 4-pin connector disconnected, and go to next step. If resistance is more than 5 ohms, repair open in Tan/Light Blue wire.
3. Measure resistance between ground and driver heated seat cushion connector (component side) terminal "C", driver seat temperature sensor input circuit. (Scheme 31) If resistance is more than 5 ohms, leave driver heated seat cushion 4-pin connector disconnected, and go to next step. If resistance is 5 ohms or less, replace driver heated seat cushion.
4. Disconnect MHSMM connector C1. Measure resistance between ground and driver heated seat cushion connector terminal "C", driver seat temperature sensor input circuit (Tan/Light Blue wire). If resistance is less than 100 ohms, repair short to ground in Tan/Light Blue wire. If resistance is 100 ohms or more, leave driver heated seat cushion 4-pin connector disconnected, and go to next step.
5. Measure resistance between driver heated seat cushion connector (component side) terminal "C", driver seat temperature sensor input circuit (Tan/Light Blue wire) and terminal "D", driver seat temperature 5-volt supply circuit (Black/Dark Green wire). If resistance is less than 70 k/ohms, replace MHSMM. If resistance is 70 k/ohms or more, replace driver heated seat cushion.
6. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C2. Measure resistance between ground and driver heated seat cushion 4-pin connector terminal "D", driver seat temperature 5-volt supply circuit (Black/Dark Green wire). (Scheme 30) If resistance is less than 100 ohms, repair short to ground in Black/Dark Green wire. If resistance is 100 ohms or more, leave driver heated seat cushion 4-pin connector and MHSMM connector C2 disconnected, and go to next step.
7. Measure resistance of driver seat temperature 5-volt supply circuit (Black/Dark Green wire) between driver heated seat cushion 4-pin connector terminal "D" and MHSMM connector C2 terminal No. 15. (Scheme 17)and (Scheme 30). If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, repair open in Black/Dark Green wire.

Passenger Heated Seat Switch Open/Shorted To Ground

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select BODY MEMORY SEAT MODULE, then retrieve DTCs. If any Memory Heated Seat/Mirror Module (MHSMM) DTCs are present, go to next step. If no MHSMM DTCs are present, go to step 3.
2. Using scan tool, clear MHSMM DTCs. Start engine and allow it to run for one minute while operating heated seat switch. Using scan tool retrieve MHSMM DTCs. If PASSENGER HEATED SEAT SWITCH OPEN/SHORTED TO GROUND DTC resets, go to step 4. If PASSENGER HEATED SEAT SWITCH OPEN/SHORTED TO GROUND DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
3. Turn ignition off. Disconnect passenger heated seat switch connector. Turn ignition on. Measure voltage on passenger heated seat switch connector terminal No. 4, fused ignition switch output circuit (Dark Blue/White wire). (Scheme 29) If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open in Dark Blue/White wire.
4. Turn ignition off. Disconnect MHSMM connector C1. Turn ignition on. Measure voltage between ground and MHSMM connector C1 terminal No. 5, passenger seat heater switch MUX circuit (Tan/Light Green wire). (Scheme 17) If voltage is more than 10 volts, replace MHSMM. If voltage is 10 volts or less, leave MHSMM connector C1 disconnected, and go to next step.
5. Turn ignition off. Disconnect passenger heated seat switch connector. Measure resistance of passenger seat heater switch MUX circuit (Tan/Light Green wire) between passenger heated seat switch connector terminal No. 6 and MHSMM connector C1 terminal No. 5. (Scheme 17)and (Scheme 29). If resistance is less than 5 ohms, leave connectors disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Tan/Light Green wire.
6. Measure resistance between ground and MHSMM connector C1 terminal No. 5, passenger seat heater switch MUX circuit (Tan/Light Green wire). If resistance is less than 100 ohms, repair short to ground in Tan/Light Green wire. If resistance is 100 ohms or more, replace passenger heated seat switch.

Passenger Heated Seat Switch Stuck In High Status

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect passenger heated seat switch connector. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, clear DTCs. Turn ignition off, then on. Using scan tool, select BODY MEMORY SEAT MODULE, then retrieve DTCs. If PASSENGER HEATED SEAT SWITCH OPEN/SHORTED TO GROUND DTC is retrieved, replace passenger heated seat switch. If PASSENGER HEATED SEAT SWITCH OPEN/SHORTED TO GROUND DTC is not retrieved, leave passenger heated seat switch connector disconnected, and go to next step.
2. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Turn ignition on. Measure voltage between ground and MHSMM connector C1 terminal No. 5, passenger seat heater switch MUX circuit (Tan/Light Green wire). (Scheme 17) If no voltage exists, replace MHSMM. If any voltage exists, repair short to voltage in Tan/Light Green wire.

Passenger Heated Seat Switch Stuck In Low Status

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect passenger heated seat switch connector. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, clear DTCs. Turn ignition off, then on. Using scan tool, select BODY MEMORY SEAT MODULE, then retrieve DTCs. If PASSENGER HEATED SEAT SWITCH OPEN/SHORTED TO GROUND DTC is retrieved, replace passenger heated seat switch. If PASSENGER HEATED SEAT SWITCH OPEN/SHORTED TO GROUND DTC is not retrieved, leave passenger heated seat switch connector disconnected, and go to next step.
2. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Turn ignition on. Measure voltage between ground and MHSMM connector C1 terminal No. 5, passenger seat heater switch MUX circuit (Tan/Light Green wire). (Scheme 17) If no voltage exists, replace MHSMM. If any voltage exists, repair short to voltage in Tan/Light Green wire.

Passenger Seat Heat Output Open

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition on. Raise driver seat to highest position to gain access to seat components and connectors. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C3. Measure resistance between ground and MHSMM connector C3 terminal No. 6, passenger seat heater B+ driver circuit (Red/Tan wire). (Scheme 17) If resistance is less than 8.5 ohms, replace MHSMM. If resistance is 8.5 ohms or more, go to next step.
2. Ensure MHSMM connector is properly connected. Raise passenger seat to highest position to gain access to seat components and connectors. Disconnect passenger heated seat back cushion 2-pin connector. Measure resistance between ground and passenger heated seat back cushion 2-pin connector terminal "B", ground circuit (Black wire). If resistance is less than 5 ohms, leave passenger heated seat back cushion 2-pin connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Black wire.
3. Disconnect passenger heated seat cushion 4-pin connector. Measure resistance of heated seat driver circuit (Brown/Black wire) between passenger heated seat back cushion 2-pin connector terminal "A" and passenger heated seat cushion 4-pin connector terminal "B". (Scheme 30) If resistance is less than 5 ohms, leave passenger heated seat cushion 4-pin connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Brown/Black wire.
4. Ensure passenger heated seat back cushion 2-pin connector is properly connected. Disconnect MHSMM connector. Measure resistance of passenger seat heater B+ driver circuit (Red/Tan wire) between passenger heated seat cushion 4-pin connector terminal "A" and MHSMM connector C3 terminal No. 6. (Scheme 17)and (Scheme 30). If resistance is less than 5 ohms, leave passenger heated seat cushion 4-pin connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Red/Tan wire.
5. Ensure MHSMM connector is properly connected. Measure resistance between passenger heated seat cushion connector (component side) terminal "A", passenger seat heater B+ driver circuit and terminal "B", heated seat driver circuit. (Scheme 31) If resistance is less than 2 ohms, go to next step. If resistance is 2.0 ohms or more, replace passenger heated seat cushion.
6. Disconnect passenger heated seat back cushion 2-pin connector. Measure resistance between passenger heated seat back cushion connector (component side) terminal "A", heated seat driver circuit and terminal "B", ground circuit. (Scheme 32) If resistance is 2 ohms or more, replace passenger heated seat back cushion. If resistance is less than 2 ohms, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Passenger Seat Heat Output Short To GND

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition on. Raise passenger seat to highest position to gain access to seat components and connectors. Turn ignition off. Disconnect passenger heated seat cushion 4-pin connector. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, clear DTCs. Turn ignition off for 20 seconds. Turn ignition on. Using scan tool, select BODY MEMORY SEAT MODULE, then retrieve DTCs. If PASSENGER SEAT HEAT OUTPUT SHORT TO GND DTC resets, leave passenger heated seat cushion 4-pin connector disconnected, and go to next step. If PASSENGER SEAT HEAT OUTPUT SHORT TO GND DTC does not reset, go to step 3.
2. Turn ignition off. Raise driver seat to highest position to gain access to seat components and connectors. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C3. Measure resistance between ground and MHSMM connector C3 terminal No. 6, passenger seat heater B+ driver circuit (Red/Tan wire). (Scheme 17) If resistance is less than 100 ohms, repair short to ground in Red/Tan wire. If resistance is 100 ohms or more, replace MHSMM.
3. Ensure passenger heated seat cushion 4-pin connector is properly connected. Disconnect passenger heated seat back cushion 2-pin connector. Measure resistance between ground and passenger heated seat back cushion connector (component side) terminal "A", passenger heated seat driver circuit. (Scheme 32) If resistance is less than 5 ohms, replace passenger heated seat back cushion. If resistance is 5 ohms or more, leave passenger heated seat back cushion 2-pin connector disconnected, and go to next step.
4. Disconnect passenger heated seat cushion 4-pin connector. Measure resistance between ground and passenger heated seat back cushion 4-pin connector (component side) terminal "A", heated seat driver circuit. (Scheme 31) If resistance is less than 100 ohms, repair short to ground in heated seat driver circuit. If resistance is 100 ohms or more, leave passenger heated seat back 4-pin connector disconnected, and go to next step.
5. Measure resistance between ground and passenger heated seat cushion 4-pin connector (component side) terminal "A", passenger seat heater B+ circuit (Red/Tan wire). If resistance is less than 5 ohms, replace passenger heated seat cushion. If resistance is 5 ohms or more, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Passenger Thermistor Out Of Range High

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition on. Raise passenger seat to highest position to gain access to seat components and connectors. Turn ignition off. Disconnect passenger heated seat cushion 4-pin connector. Turn ignition on. Turn passenger heated seat switch on. Measure voltage between ground and passenger heated seat cushion 4-pin connector terminal "D", passenger seat temperature 5-volt supply circuit (Black/Light Green wire). (Scheme 30) If voltage is more than 5.5 volts, leave passenger heated seat cushion 4-pin connector disconnected, and go to next step. If voltage is 5.5 volts or less, leave passenger heated seat cushion 4-pin connector disconnected, and go to step 3.
2. Turn ignition off. Raise driver seat to highest position to gain access to seat components and connectors. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C2. Turn ignition on. Measure voltage between ground and passenger heated seat cushion 4-pin connector terminal "D", passenger seat temperature 5-volt supply circuit (Black/Light Green wire). If any voltage exists, repair short to voltage in Black/Light Green wire. If no voltage exists, replace MHSMM.
3. Turn ignition off. Raise driver seat to highest position to gain access to seat components and connectors. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Turn ignition on. Measure voltage between ground and passenger heated seat cushion 4-pin connector terminal "C", passenger seat temperature sensor input circuit (Tan/Dark Blue wire). If any voltage exists, repair short to voltage in Tan/Dark Blue wire. If no voltage exists, replace passenger heated seat cushion.

Passenger Thermistor Out Of Range Low

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition on. Raise passenger seat to highest position to gain access to seat components and connectors. Turn ignition off. Disconnect passenger heated seat cushion 4-pin connector. Turn ignition on. Measure voltage between ground and passenger heated seat cushion 4-pin connector terminal "D", passenger seat temperature 5-volt supply circuit (Black/Light Green wire). (Scheme 30) If voltage is 4.5 volts or more, leave passenger heated seat cushion 4-pin connector disconnected, and go to next step. If voltage is less than 4.5 volts, leave passenger heated seat cushion 4-pin connector disconnected, and go to step 6.
2. Turn ignition off. Raise driver seat to highest position to gain access to seat components and connectors. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Measure resistance of passenger seat temperature sensor input circuit (Tan/Dark Blue wire) between passenger heated seat cushion 4-pin connector terminal "C" and MHSMM connector C1 terminal No. 17. (Scheme 17)and (Scheme 30). If resistance is less than 5 ohms, leave connectors disconnected, and go to next step. If resistance is more than 5 ohms, repair open in Tan/Dark Blue wire.
3. Measure resistance between ground and passenger heated seat cushion connector terminal "C", passenger seat temperature sensor input circuit (Tan/Dark Blue wire). If resistance is less than 100 ohms, repair short to ground in Tan/Dark Blue wire. If resistance is 100 ohms or more, leave passenger heated seat cushion 4-pin connector disconnected, and go to next step.
4. Ensure MHSMM connector is properly connected. Measure resistance between passenger heated seat cushion connector (component side) terminal "C", passenger seat temperature sensor input circuit (Tan/Dark Blue wire) and terminal "D", passenger seat temperature 5-volt supply circuit (Black/Light Green wire). (Scheme 31) If resistance is less than 70 k/ohms, leave passenger heated seat cushion 4-pin connector disconnected, and go to next step. If resistance is 70 k/ohms or more, replace passenger heated seat cushion.
5. Measure resistance between ground and passenger heated seat cushion connector (component side) terminal "C", passenger seat temperature sensor input circuit. If resistance is less than 5 ohms, replace passenger heated seat cushion. If resistance is 5 ohms or more, replace MHSMM.
6. Turn ignition off. Raise driver seat to highest position to gain access to seat components and connectors. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C2. Measure resistance between ground and passenger heated seat cushion connector terminal "D", passenger seat temperature 5-volt supply circuit (Black/Light Green wire). (Scheme 30) If resistance is less than 100 ohms, repair short to ground in Black/Light Green wire. If resistance is 100 ohms or more, leave connectors disconnected, and go to next step.
7. Measure resistance of passenger seat temperature 5-volt supply circuit (Black/Light Green wire) between passenger heated seat cushion 4-pin connector terminal "D" and MHSMM connector C2 terminal No. 14. (Scheme 17)and (Scheme 30). If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, repair open in Black/Light Green wire.

Heated Seats Inoperative (Due To Key-In Ignition Switch Status)

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select BODY COMPUTER, then INPUT. Using scan tool, read KEY-IN IGNITION SWITCH status. If scan tool does not display KEY-IN IGN: CLOSED, go to next step. If scan tool displays KEY-IN IGN: CLOSED, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
2. Turn ignition off. Disconnect ignition switch connector. Connect a jumper wire between ground and ignition switch connector terminal No. l, key-in ignition switch sense circuit (Light Blue wire). (Scheme 34) Using scan tool, read KEY-IN IGNITION status. If scan tool displays KEY-IN IGN: CLOSED, replace ignition switch. If scan tool does not display KEY-IN IGN: CLOSED, leave ignition switch connector disconnected, and go to next step.
3. Turn off all lights. Measure resistance between ground and ignition switch connector terminal No. 3, ground circuit (Black/Light Green wire). If resistance is less than 5 ohms, leave ignition switch connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Black/Light Green wire.
4. Disconnect Body Control Module (BCM) connector C2. Measure resistance of key-in ignition switch sense circuit (Light Blue wire) between ignition switch connector terminal No. 1 and BCM connector C2 terminal No. 24. (Scheme 8)and (Scheme 34). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Light Blue wire.

Scheme 33

Rear Window Defogger Inoperative (Manual A/C)

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select SENSORS, then read MODE SW MUX voltage while pressing and holding defogger switch on. If about 0.25 volt is displayed, go to next step. If about 0.25 volt is not displayed, replace A/C control module.
2. Measure resistance between ground and left bus bar on rear window. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in rear window defogger grid ground circuit. See WIRING DIAGRAMS appropriate REAR WINDOW DEFOGGERS & HEATED MIRRORS article.
3. Turn ignition on. Turn rear window defogger on. Using a 12-volt test light connected to ground, probe right bus bar on rear window. If test light does not illuminate, go to next step. If test light illuminates, repair open in rear window defogger grid. See appropriate REAR WINDOW DEFOGGERS & HEATED MIRRORS article.
4. Turn ignition off. Remove rear window defogger relay. Turn ignition on. Measure voltage between ground and rear window defogger relay connector terminals No. 4 and 8, fused B+ circuits (Black/Pink wires). (Scheme 35) If voltage is more than 10 volts on both terminals, leave rear window defogger relay removed, and go to next step. If voltage is not more than 10 volts on both terminals, go to step 8.
5. Connect a fused jumper wire between rear window defogger relay connector terminals No. 2, rear window defogger relay output circuit (Black/White wire) and No. 4, fused B+ circuit (Black/Pink wire). Measure voltage between ground and right bus bar on rear window. If voltage is more than 10 volts, remove jumper wire, leave rear window defogger relay removed, and go to next step. If voltage is 10 volts or less, remove jumper wire, and repair open in Black/White wire.
6. Turn ignition off. Connect a 12-volt test light between rear window defogger relay connector terminals No. 4, fused B+ circuit (Black/Pink wire) and No. 6, rear window defogger relay control circuit (Dark Blue/White wire). Turn ignition on. Turn rear window defogger on. If test light does not illuminate, leave rear window defogger relay removed, and go to next step. If test light illuminates, replace rear window defogger relay.
7. Turn ignition off. Disconnect Body Control Module (BCM) connector C4. Check, clean and repair BCM connectors as necessary. Connect a fused jumper wire between ground and BCM connector C4 terminal No. 14, rear window defogger relay control circuit (Dark Blue/White wire). (Scheme 8) Measure resistance between ground and rear window defogger relay connector terminal No. 6, rear window defogger relay control circuit (Dark Blue/White wire). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Dark Blue/White wire.
8. Turn ignition off. Remove and inspect Electric Back Light (EBL) fuse "A" in Power Distribution Center (PDC). (Scheme 25) If fuse is open, go to next step. If fuse is okay, repair open in fused B+ circuit (Black/Pink wire) between PDC and rear window defogger relay connector.
9. Measure resistance between ground and rear window defogger relay connector terminals No. 4 and 8, fused B+ circuits (Black/Pink wires). (Scheme 35) If resistance is less than 100 ohms on either terminal, repair short to ground in Black/Pink wire(s). If resistance is 100 ohms or more on both terminals, go to next step.
10. Replace fuse "A". Install rear window defogger relay. Turn ignition on. Turn rear window defogger on. If rear window defogger operates and blows fuse, repair short to ground in rear window defogger relay output circuit (Black/White wire) between rear window defogger relay connector and rear window defogger grid. If rear window defogger operates without blowing fuse, system is currently operating properly. Fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Scheme 34

Rear Window Defogger Inoperative W/ATC

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select INPUTS/OUTPUTS, then read EBL SW status. Press defogger switch on, then off. If scan tool displays EBL SW: OPEN, then EBL SW: CLOSED, go to next step. If scan tool does not display EBL SW: OPEN, then EBL SW: CLOSED, replace Automatic Temperature Control (ATC) module.
2. Turn ignition off. Measure resistance between ground and left bus bar on rear window. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in rear window defogger grid ground circuit. See WIRING DIAGRAMS appropriate REAR WINDOW DEFOGGERS & HEATED MIRRORS article.
3. Turn ignition on. Turn defogger on. Using a 12-volt test light connected to ground, probe right bus bar on rear window. If test light does not illuminate, go to next step. If test light illuminates, repair open in rear window defogger grid. See appropriate REAR WINDOW DEFOGGERS & HEATED MIRRORS article.
4. Turn ignition off. Remove rear window defogger relay. Turn ignition on. Measure voltage between ground and rear window defogger relay connector terminals No. 4 and 8, fused B+ circuits (Black/Pink wires). (Scheme 35) If voltage is more than 10 volts on both terminals, leave rear window defogger relay removed, and go to next step. If voltage is not more than 10 volts on both terminals, go to step 8.
5. Connect a fused jumper wire between rear window defogger relay connector terminals No. 2, rear window defogger relay output circuit (Black/White wire) and No. 4, fused B+ circuit (Black/Pink wire). Measure voltage between ground and right bus bar on rear window. If voltage is more than 10 volts, remove jumper wire, leave rear window defogger relay removed, and go to next step. If voltage is 10 volts or less, remove jumper wire, and repair open in Black/White wire.
6. Turn ignition off. Connect a 12-volt test light between rear window defogger relay connector terminals No. 4, fused B+ circuit (Black/Pink wire) and No. 6, rear window defogger relay control circuit (Dark Blue/White wire). Turn ignition on. Turn rear window defogger on. If test light does not illuminate, leave rear window defogger relay removed, and go to next step. If test light illuminates, replace rear window defogger relay.
7. Turn ignition off. Disconnect Body Control Module (BCM) connector C4. Check, clean and repair BCM connectors as necessary. Connect a fused jumper wire between ground and BCM connector C4 terminal No. 14, rear window defogger relay control circuit (Dark Blue/White wire). (Scheme 8) Measure resistance between ground and rear window defogger relay connector terminal No. 6, rear window defogger relay control circuit (Dark Blue/White wire). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Dark Blue/White wire.
8. Turn ignition off. Remove and inspect Electric Back Light (EBL) fuse "A" in Power Distribution Center (PDC). (Scheme 25) If fuse is open, go to next step. If fuse is okay, repair open in fused B+ circuit (Black/Pink wire) between PDC and rear window defogger relay connector.
9. Remove rear window defogger relay. Measure resistance between ground and rear window defogger relay connector terminals No. 4 and 8, fused B+ circuits (Black/Pink wires). (Scheme 35) If resistance is less than 100 ohms on either terminal, repair short to ground in Black/Pink wire(s). If resistance is 100 ohms or more on both terminals, go to next step.
10. Replace fuse "A". Install rear window defogger relay. Turn ignition on. Turn rear window defogger on. If rear window defogger operates and blows fuse, repair short to ground in rear window defogger relay output circuit (Black/White wire) between rear window defogger relay connector and rear window defogger grid. If rear window defogger operates without blowing fuse, system is currently operating properly. Fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

EXTERIOR LIGHTING SYSTEMS

Note. For exterior lighting systems wiring diagrams, see DAYTIME RUNNING LIGHTS, HEADLIGHT SYSTEMS and/or EXTERIOR LIGHTS articles.

Headlight Switch Input Failure

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Ensure headlight switch is off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, read HEADLIGHT SWITCH voltage. If voltage is more than 4.8 volts, go to next step. If voltage is 4.8 volts or less, go to step 7.
2. Turn ignition off. Disconnect headlight switch connector. Turn ignition on. Measure voltage between ground and headlight switch connector terminal No. 12, headlight switch MUX circuit (Yellow wire). (Scheme 36) If voltage is more than 5.3 volts, leave headlight switch connector disconnected, and go to next step. If voltage is 5.3 volts or less, leave headlight switch connector disconnected, and go to step 5.
3. Turn ignition off. Disconnect Body Control Module (BCM) connector C2. Measure resistance of headlight switch return circuit (White wire) between BCM connector C2 terminal No. 19 and headlight switch connector terminal No. 6. (Scheme 8)and (Scheme 36). If resistance is less than 5 ohms, leave connectors disconnected, and go to next step. If resistance is 5 ohms or more, repair open in White wire.
4. Turn ignition on. Measure voltage between ground and BCM connector terminal No. 2, headlight switch MUX circuit (Yellow wire). If any voltage exists, repair short to voltage in Yellow wire. If no voltage exists, replace BCM.
5. Turn ignition off. Disconnect Body Control Module (BCM) connector C2. Measure resistance of headlight switch MUX circuit (Yellow wire) between BCM connector C2 terminal No. 2 and headlight switch connector terminal No. 12 C2. (Scheme 8)and (Scheme 36). If resistance is less than 5 ohms, leave headlight switch connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Yellow wire.
6. Connect BCM connector C2. Connect a fused jumper wire between headlight switch connector terminal No. 6, headlight switch return circuit (White wire) and No. 12, headlight switch MUX circuit (Yellow wire). Using scan tool, read HEADLIGHT SWITCH voltage. If voltage is zero volts, replace headlight switch. If voltage is more than zero volts, leave headlight switch connector disconnected, and go to next step.
7. Disconnect jumper wire. Using scan tool, read HEADLIGHT SWITCH voltage. If voltage is 4.8-5.2 volts, replace headlight switch. If voltage is not 4.8-52 volts, leave headlight switch connector disconnected, and go to next step.
8. Turn ignition off. Disconnect BCM connector C2. Measure resistance between ground and BCM connector C2 terminal No. 12, headlight switch MUX circuit (Yellow wire). (Scheme 8) If resistance is less than 100 ohms, repair short to ground in Yellow wire. If resistance is 100 ohms or more, replace BCM.

Scheme 35

Auto Lamps And/Or Fog Lights Not Operating Properly

Note. Ensure headlights and fog lights operate properly in manual mode before proceeding.

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn fog lights off. Turn headlight switch to AUTO position. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, read HEADLIGHT SWITCH voltage. If voltage is about 2.3 volts, go to next step. If voltage is not about 2.3 volts, replace headlight switch.
2. Turn fog lights on. Using scan tool, read HEADLIGHT SWITCH voltage. If voltage is about 3.7 volts, go to next step. If voltage is not about 3.7 volts, replace headlight switch.
3. Using scan tool, select SENSORS. Monitor AUTO HEADLIGHTS SENSE voltage. Shine bright light on sun sensor, then cover sun sensor. Voltage display should change from zero volts to 5 volts. If voltage is as specified, replace Body Control Module (BCM). If voltage stays at more than 4.8 volts, go to next step. If voltage stays at less than 0.5 volt, go to step 8.
4. Turn ignition off. Disconnect sun sensor/Vehicle Theft Security System (VTSS) indicator connector. Connect a fused jumper wire between sun sensor/VTSS indicator connector terminals No. 3, sensor ground circuit (Dark Blue/Gray wire) and No. 4, sun sensor signal circuit (Dark Blue). (Scheme 37) Turn ignition on. Using scan tool, read AUTO HEADLIGHT SENSE voltage. If voltage is less than 0.5 volt, replace sun sensor/VTSS indicator. If voltage is 0.5 volt or more, leave sun sensor/VTSS connector disconnected, and go to next step.
5. Turn ignition off. Disconnect BCM connector C2. Measure resistance of sun sensor signal circuit (Dark Blue wire) between sun sensor/VTSS indicator connector terminal No. 4 and BCM C2 connector terminal No. 10. (Scheme 8)and (Scheme 37). If resistance is less than 5 ohms, leave connectors disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Dark Blue wire.
6. Turn ignition on. Measure voltage on BCM connector C2 terminal No. 10, sun sensor signal circuit (Dark Blue wire). If any voltage exists, repair short to voltage in Dark Blue wire. If no voltage exists, leave sun sensor/VTSS indicator connector disconnected, and go to next step.
7. Turn ignition off. Disconnect BCM connector C1. Measure resistance of sensor ground circuit (Dark Blue/Gray wire) between sun sensor/VTSS indicator connector terminal No. 2 and BCM connector C1 terminal No. 8. If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Dark Blue/Gray wire.
8. Turn ignition off. Disconnect sun sensor/Vehicle Theft Security System (VTSS) indicator connector. Turn ignition on. Using scan tool, read AUTO HEADLIGHT SENSE voltage. If voltage is more than 4.8 volts, replace sun sensor/VTSS indicator. If voltage is 4.8 volts or less, leave sun sensor/VTSS indicator connector disconnected, and go to next step.
9. Turn ignition off. Disconnect BCM connector C2. Measure resistance between ground and BCM connector C2 terminal No. 10, sun sensor signal circuit (Dark Blue wire). (Scheme 8) If resistance is less than 100 ohms, repair short to ground in Dark Blue wire. If resistance is 100 ohms or more, replace BCM.

Scheme 36

Fog Lights Will Not Turn Off

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, retrieve Body Control Module (BCM) DTCs. If no DTCs exist, go to next step. If any DTCs exist, perform appropriate test. See «DIAGNOSTIC TROUBLE CODE IDENTIFICATION»(ref-37884-S09732796892001011000000) table under SELF-DIAGNOSTIC SYSTEM.
2. Ensure headlight switch is off. Using scan tool, read HEADLIGHT SWITCH voltage. If voltage is 4.3-4.8 volts, go to next step. If voltage is not 4.3-4.8 volts, replace headlight switch.
3. Remove fog light relay from junction block. If fog lights turn off, leave fog light relay removed, and go to next step. If fog lights do not turn off, repair short to voltage in fog light relay circuit (Light Blue wire) between headlight switch connector terminal No. 11 and junction block connector C2 terminal No. 2. (Scheme 9)and (Scheme 36).
4. Install fog light relay. If relay clicks when installed, replace BCM. If fog light relay does not click when installed, replace fog light relay.

Fog Lights Will Not Turn On

Note. Ensure headlight high and low beams operate properly before proceeding.

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, read HEADLIGHT SWITCH voltage. If voltage is about 3 volts, go to next step. If voltage is not about 3 volts, replace headlight switch.
2. Locate fog light relay in junction block. (Scheme 38) Using scan tool, actuate fog light relay. If relay clicks, go to next step. If relay does not click, go to step 5.
3. Remove fog light relay from junction block. Measure voltage between ground and fog light relay connector terminal No. 66. If voltage is more than 10 volts, leave fog light relay removed, and go to next step. If voltage is 10 volts or less, replace junction block.
4. Connect a fused jumper wire between fog light relay connector terminals No. 66 and 67. If fog lights illuminate, replace fog light relay. If fog lights do not illuminate, repair open in fog light relay output circuit (Light Blue wire) between headlight switch connector terminal No. 11 and junction block connector C2 terminal No. 2. (Scheme 9)and (Scheme 36).
5. Turn ignition off. Remove and inspect fuse No. 16 (20-amp) in junction block. (Scheme 38) If fuse is open, go to next step. If fuse is okay, install fuse, and go to step 7.
6. Remove fog light relay from junction block. Measure resistance between ground and fog light relay connector terminal No. 67. If resistance is less than 100 ohms, repair short to ground in fog light relay output circuit (Light Blue wire) between headlight switch connector terminal No. 11 and junction block connector C2 terminal No. 2, and replace fuse. (Scheme 9)and (Scheme 36). If resistance is 100 ohms or more, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary, and replace fuse. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete. Replace fuse.
7. Remove fog light relay from junction block. Turn ignition on. Measure voltage between ground and fog light relay connector terminal No. 66. (Scheme 38) If voltage is more than 10 volts, leave fog light relay removed, and go to next step. If voltage is 10 volts or less, replace junction block.
8. Turn ignition off. Remove Body Control Module (BCM) from back of junction block. Measure resistance between fog light relay connector terminal No. 64 and terminal No. 17 at BCM connector on back of junction block. (Scheme 9)and (Scheme 38). If resistance is less than 5 ohms, leave fog light relay removed, and go to next step. If resistance is 5 ohms or more, replace junction block.
9. Connect BCM to back of junction block. Connect a 12-volt test light between fog light relay connector terminals No. 64 and 65. Turn ignition on. Using scan tool, actuate fog light relay. If test light illuminates, replace fog light relay. If fog light relay does not illuminate, replace BCM.

Scheme 37

Headlight Time Delay Inoperative

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, read IGNITION VOLTAGE. If voltage is more than 10 volts, replace Body Control Module (BCM). If voltage is 10 volts or less, perform BATTERY POWER TO MODULE DISCONNECTED test under COMMUNICATIONS SYSTEM.

High Beam Headlights Will Not Turn Off

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Remove high beam relay in junction block. (Scheme 38) If high beams turn off, leave high beam relay removed, and go to next step. If high beams do not turn off, repair short to voltage in high beam relay output circuit between high beam relay and headlights. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000).
2. Measure voltage on high beam relay connector terminal No. 57, high beam relay control circuit. If voltage is more than one volt, leave high beam relay removed, and go to next step. If voltage is one volt or less, replace high beam relay.
3. Disconnect multifunction switch connector. Measure voltage on high beam relay connector terminal No. 57, high beam relay control circuit. If voltage is more than one volt, repair short to voltage in high beam relay control circuit between multifunction switch and high beam relay. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). If voltage is one volt or less, replace multifunction switch.

High Beam Headlights Will Not Turn On

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Locate high beam relay in junction block. (Scheme 38) Turn headlights on. Cycle high beams on and off. If high beam relay clicks, go to next step. If high beam relay does not click, go to step 4.
2. Remove high beam relay from junction block. Measure voltage on high beam relay connector terminal No. 58, fused B+ circuit. If voltage is more than 10 volts, leave high beam relay removed, and go to next step. If voltage is 10 volts or less, repair fused B+ circuit between Power Distribution Center (PDC) fuse "C" and junction block. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000).
3. Using a fused jumper wire, connect high beam relay connector terminals No. 58 and 59. If high beams illuminate, replace high beam relay. If high beams do not illuminate, repair open in high beam relay output circuit between high beam relay connector and headlights. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000).
4. Remove and inspect fuse No. 11 (20-amp) in junction block. If fuse is open, leave fuse removed, and go to next step. If fuse is okay, go to step 7.
5. Disconnect multifunction switch connector. Measure resistance between ground and fuse No. 11 connector output circuit (Brown/White wire). If resistance is less than 100 ohms, repair short to ground in Brown/White wire between junction block and multifunction switch. If resistance is 100 ohms or more, leave multifunction switch connector disconnected, and go to next step.
6. Remove high beam relay from junction block. Measure resistance between ground and high beam relay connector terminal No. 57, high beam relay control circuit. If resistance is less than 5 ohms, repair short to ground in high beam relay control circuit between multifunction switch and high beam relay, and install fuse. See HEADLIGHT SYSTEMS article. If resistance is 5 ohms or more, replace high beam relay.
7. Remove high beam relay from junction block. Measure resistance between ground and high beam relay connector terminal No. 56, ground circuit. (Scheme 38) If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Black wire between junction block and ground.
8. Disconnect multifunction switch connector. Turn headlights on. Measure voltage on multifunction switch connector terminal No. 4, fused low beam relay output circuit (Brown/White wire). (Scheme 39) If battery voltage does not exist, leave multifunction switch connector disconnected, and go to next step. If battery voltage exists, replace high beam relay.
9. Turn headlights off. Turn ignition off. Measure voltage on multifunction switch connector terminal No. 5, fused B+ circuit (Pink/Red wire). If battery voltage exists, go to next step. If battery voltage does not exist, repair open in Pink/Red wire between multifunction switch connector and junction block.
10. Install high beam relay. Using a fused jumper wire, connect multifunction switch connector terminal No. 4, fused low beam relay output circuit (Brown/White wire) and No. 7, switched high beam relay control circuit (White/Light Green wire). Turn headlights on. If high beams illuminate, repair open in White/Light Green wire. If high beams do not illuminate, replace multifunction switch.

Scheme 38

Low Beam Headlights Will Not Turn Off

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Using scan tool, retrieve Body Control Module (BCM) Diagnostic Trouble Codes (DTC). If scan tool displays HEADLIGHT SWITCH INPUT FAILURE, perform «HEADLIGHT SWITCH INPUT FAILURE»(ref-37884-S27355040722001011000000) test. If any other DTCs exist, repair those before proceeding. See «DIAGNOSTIC TROUBLE CODE IDENTIFICATION»(ref-37884-S09732796892001011000000) table under SELF-DIAGNOSTIC SYSTEM. If no DTCs exist, go to next step.
2. Ensure headlight switch is off. Using scan tool, read HEADLIGHT SWITCH voltage. If voltage is 4.3-4.8 volts, go to next step. If voltage is not 4.3-4.8 volts, replace headlight switch.
3. Turn ignition off. Remove low beam relay from junction block. (Scheme 38) If low beams turn off, leave low beam relay removed, and go to next step. If low beams do not turn off, install low beam relay, and repair short to voltage in low beam relay output circuit between low beam relay and headlights. See HEADLIGHT SYSTEMS article.
4. Substitute known-good low beam relay. If low beams do not operate properly, remove low beam relay, and go to next step. If low beams operate properly, replace low beam relay.
5. Ensure ignition is off. Remove Body Control Module (BCM) from back of junction block. Measure resistance between ground and terminal No. 14 at BCM connector on back of junction block. (Scheme 9) If resistance is less than 5 ohms, replace junction block. If resistance is 5 ohms or more, leave low beam relay and BCM removed, and go to next step.
6. Measure resistance between terminal No. 14 and each other terminal at BCM connector on back of junction block. If any resistance is less than 5 ohms, replace junction block. If all resistances are 5 ohms or more, replace BCM.

Low Beam Headlights Will Not Turn On

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn low beams on. Using scan tool, read HEADLIGHT SWITCH voltage. If voltage is 1.4-1.8 volts, go to next step. If voltage is not 1.4-1.8, replace headlight switch.
2. Locate low beam relay in junction block. (Scheme 38) Using scan tool, actuate low beam relay. If low beam relay clicks, go to next step. If low beam relay does not click, go to step 5.
3. Ensure ignition is off. Remove low beam relay from junction block. Measure voltage on low beam relay connector terminal No. 62, fused B+ circuit. If voltage is more than 10 volts, leave low beam relay removed, and go to next step. If voltage is 10 volts or less, replace junction block.
4. Ensure fuses No. 10 (10-amp) and No. 12 (10-amp) in junction block are okay. Using a fused jumper wire, connect low beam relay connector terminal No. 62, fused B+ circuit and No. 63, low beam relay output circuit. If low beams illuminate, replace low beam relay. If low beams do not illuminate, repair open in low beam relay output circuit between junction block and headlights. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000).
5. Turn ignition off. Remove low beam relay from junction block. Measure voltage on low beam relay connector terminal No. 61, fused B+ circuit. If voltage is more than 10 volts, leave low beam relay removed, and go to next step. If voltage is 10 volts or less, install low beam relay, and go to step 8.
6. Connect a 12-volt test light between low beam relay connector terminal No. 60, low beam relay control circuit and No. 61, fused B+ circuit. Using scan tool, actuate low beam relay. If test light flashes, replace low beam relay. If test light does not flash, leave low beam relay removed, and go to next step.
7. Ensure ignition is off. Remove Body Control Module (BCM) from back of junction block. Measure resistance between low beam relay connector terminal No. 60 and terminal No. 14 at BCM connector on back of junction block. (Scheme 9)and (Scheme 38). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, replace junction block.
8. Remove and inspect fuse "D" (40-amp) in power distribution center. (Scheme 25) If fuse is open, leave fuse removed, and go to next step. If fuse is okay, repair open in fused B+ circuit (Light Blue/Red wire) between junction block and power distribution center.
9. Measure resistance between ground and fuse "D" connector B+ circuit (Light Blue/Red wire). If resistance is less than 100 ohms, repair short to ground in Light Blue/Red wire. If resistance is 100 ohms or more, replace fuse, and repeat this test. If test passes, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary, and replace fuse. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Parking Lights Will Not Turn Off

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn headlights off. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Using scan tool, read HEADLIGHT SWITCH voltage. If voltage is about 4.5 volts, go to next step. If voltage is not about 4.5 volts, replace headlight switch.
2. Remove parking light relay from junction block. (Scheme 38) If parking lights turn off, leave parking light relay removed, and go to next step. If parking lights do not turn off, repair short to voltage in parking light relay output circuit (Black/Yellow wire) between junction block and parking lights.
3. Install parking light relay. If parking light relay clicks, replace Body Control Module (BCM). If parking light relay does not click, replace parking light relay.

Parking Lights Will Not Turn On

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn parking lights on. Turn ignition on. Using scan tool, read HEADLIGHT SWITCH voltage. If voltage is about 0.5 volt, go to next step. If voltage is not about 0.5 volt, replace headlight switch.
2. Using scan tool, actuate parking light relay. If parking light relay clicks, go to next step. If parking light relay does not click, go to step 5.
3. Remove parking light relay from junction block. Using a fused jumper wire, connect parking light relay connector terminal No. 54, fused B+ circuit and No. 55, parking light relay output circuit. (Scheme 38) If parking lights illuminate, leave parking light relay removed, and go to next step. If parking lights do not illuminate, repair open in Black/Yellow wire between junction block and parking lights.
4. Measure voltage on parking light relay connector terminal No. 54, fused B+ circuit. If voltage is more than 10 volts, replace parking light relay. If voltage is 10 volts or less, replace junction block.
5. Remove parking light relay. Measure voltage on parking light relay connector terminal No. 53, fused B+ circuit. (Scheme 38) If voltage is more than 10 volts, leave parking light relay removed, and go to next step. If voltage is 10 volts or less, go to step 8.
6. Connect a test light between parking light relay connector terminal No. 52, parking light relay control circuit and No. 53, fused B+ circuit. Using scan tool, actuate parking light relay. If test light flashes, replace parking light relay. If test light does not flash, leave parking light relay removed, and go to next step.
7. Ensure ignition is off. Remove Body Control Module (BCM) from back of junction block. Measure resistance between parking light relay connector terminal No. 52 and BCM connector terminal No. 16 at BCM connector on back or junction block. (Scheme 9)and (Scheme 38). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, replace junction block.
8. Remove and inspect fuse No. 7 (20-amp) in junction block. If fuse is open, go to next step. If fuse is okay, install fuse, and repair open in Pink/White wire between power distribution center and junction block.
9. Measure resistance between ground and parking light relay connector terminal No. 53, fused B+ circuit. If resistance is less than 5 ohms, replace junction block and fuse. If resistance is 5 ohms or more, go to next step.
10. Ensure ignition is off. Remove parking light relay in junction block. Measure resistance between ground and parking light relay connector terminal No. 55, parking light relay output circuit. If resistance is less than 5 ohms, leave parking light relay removed, and go to next step. If resistance 5 ohms or more, replace fuse, and repeat this test. If test passes, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary, and replace fuse. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
11. Remove Body Control Module (BCM) from back of junction block. Measure resistance between ground and parking light relay connector terminal No. 55, parking light relay output circuit. If resistance is less than 100 ohms, repair short to ground in Black/Yellow wire between junction block and parking lights. If resistance is 100 ohms or more, replace BCM.

INSTRUMENT CLUSTER SYSTEMS

Note. For instrument panel wiring diagrams, see WIRING DIAGRAMS in appropriate INSTRUMENT PANELS article.

Dimming Level Switch Failure

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Using scan tool, read DIMMING LEVEL voltage. If voltage is 0.2-4.0 volts, go to next step. If voltage is not 0.2-4.0 volts, go to step 3.
2. Turn ignition on. Using scan tool, select BODY COMPUTER, then SENSORS. Observe DIMMING LEVEL voltage while slowly rotating dimmer switch from low to high, then from high to dome. Voltage should increase from 0.6 volt to 5.5 volts, then from 5.5 volts to 9.4 volts. If voltage is not as specified, replace headlight switch. If voltage is as specified, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
3. Turn ignition on. Using scan tool, read DIMMING LEVEL voltage. If voltage is more than 10.2 volts, go to next step. If voltage is 10.2 volts or less, go to step 9.
4. Turn ignition off. Disconnect headlight switch connector. Disconnect Body Control Module (BCM) connector C2. Measure resistance of headlight switch return circuit (White wire) between BCM C2 connector terminal No. 19 and headlight switch connector terminal No. 6. (Scheme 8)and (Scheme 36). If resistance is less than 5 ohms, leave connectors disconnected, and go to next step. If resistance is 5 ohms or more, repair open in White wire.
5. Measure resistance of panel lights dimmer signal circuit (Red wire) between BCM C2 connector terminal No. 21 and headlight switch connector terminal No. 3. If resistance is less than 5 ohms, leave connectors disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Red wire.
6. Turn ignition on. Connect a 12-volt test light between ground and headlight switch connector terminal No. 3, panel lights dimmer signal circuit (Red wire). If test light illuminates, repair short to voltage in Red wire. If test light does not illuminate, leave headlight switch connector disconnected, and go to next step.
7. Turn ignition off. Reconnect BCM connector C2. Turn ignition on. Measure voltage on headlight switch connector terminal No. 3, panel lights dimmer signal circuit (Red wire). If voltage is more than 10 volts, leave headlight switch connector disconnected, and go to next step. If voltage is 10 volts or less, replace BCM.
8. Connect a jumper wire between headlight switch connector terminal No. 3, panel lights dimmer signal circuit (Red wire) and terminal No. 6, headlight switch return circuit (White wire). Using scan tool, read DIMMING LEVEL voltage. If voltage is less than one volt, replace headlight switch. If voltage is one volt or more, replace BCM.
9. Turn ignition off. Disconnect Body Control Module (BCM) connector C2. Disconnect headlight switch connector. Measure resistance between ground and BCM connector C2 terminal No. 21, panel lights dimmer signal circuit (Red wire). (Scheme 8) If resistance is less than 100 ohms, repair short to ground in Red wire. If resistance is 100 ohms or more, leave connectors disconnected, and go to next step.
10. Measure resistance between BCM connector C2 terminals No. 19, headlight switch return circuit (White wire) and No. 21, panel lights dimmer signal circuit (Red wire). If resistance is less than 100 ohms, repair White wire for short to Red wire. If resistance is 100 ohms or more, leave headlight switch connector disconnected, and go to next step.
11. Connect BCM connector C2. Turn ignition on. Measure voltage on headlight switch connector terminal No. 3, panel lights dimmer signal circuit (Red wire). (Scheme 36) If voltage is more than 10 volts, replace headlight switch. If voltage is 10 volts or less, replace BCM.

Fuel Level Sending Unit Failure

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Remove rear seat cushion. Disconnect C308 Black connector. Turn ignition on. Measure voltage on C308 Black connector terminal No. 3, fuel level sensor signal circuit (Dark Blue wire). (Scheme 40) If voltage is more than 10 volts, leave C308 Black connector disconnected, and go to next step. If voltage is 10 volts or less, go to step 5.
2. Connect a 12-volt test light between ground and C308 Black connector terminal No. 3, fuel level sensor signal circuit (Dark Blue wire). If test light illuminates, leave C308 Black connector disconnected, and go to next step. If test light does not illuminate, leave C308 Black connector disconnected, and go to step 4.
3. Turn ignition off. Disconnect Body Control Module (BCM) connector C4. Turn ignition on. Connect a 12-volt test light between ground and C308 Black connector terminal No. 3, fuel level sensor signal circuit (Dark Blue wire). If test light illuminates, repair short to voltage in Dark Blue wire. If test light does not illuminate, replace BCM.
4. Turn ignition off. Measure resistance between ground and C308 Black connector terminal No. 2, ground circuit (Black wire). If resistance is less than 10 ohms, replace fuel pump module. If resistance is 10 ohms or more, repair open in Black wire.
5. Turn ignition off. Ensure C308 Black connector is properly connected. Connect scan tool to Data Link Connector (DLC). Using scan tool, read FUEL LEVEL voltage. If voltage is more than 9 volts, repair open in Dark Blue wire between Body Control Module (BCM) and fuel pump module. If voltage is 9 volts or less, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Scheme 39

No Messages From ABS

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Using scan tool, attempt to communicate with Controller Anti-lock Brake (CAB). If scan tool communicates with CAB, go to next step. If scan tool does not communicate with CAB, perform «NO RESPONSE FROM CONTROLLER ANTI-LOCK BRAKE»(ref-37884-S04053310272001011000000) test under COMMUNICATIONS SYSTEM.
2. Using scan tool, clear DTCs. Turn ignition off. Turn ignition on for approximately one minute. Using scan tool, retrieve DTCs. If NO MESSAGES FROM ABS DTC resets, replace instrument cluster. If NO MESSAGES FROM ABS DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

No Messages From AECM

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with Occupant Restraint Controller (ORC). If scan tool communicates with ORC, go to next step. If scan tool does not communicate with ORC, perform «NO RESPONSE FROM OCCUPANT RESTRAINT CONTROLLER»(ref-37884-S34861455472001011000000) test under COMMUNICATIONS SYSTEM.
2. Using scan tool, clear DTCs. Turn ignition off. Turn ignition on for approximately one minute. Using scan tool, retrieve DTCs. If NO MESSAGES FROM AECM DTC resets, replace instrument cluster. If NO MESSAGES FROM AECM DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

No Messages From BCM

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with Body Control Module (BCM). If scan tool communicates with BCM, go to next step. If scan tool does not communicate with BCM, perform «BUS +/- SIGNAL OPEN FROM BODY CONTROL MODULE»(ref-37884-S06574507812001011000000) test under COMMUNICATIONS SYSTEM.
2. Using scan tool, clear DTCs. Turn ignition off. Turn ignition on for approximately one minute. Using scan tool, retrieve DTCs. If NO MESSAGES FROM BCM DTC resets, replace instrument cluster. If NO MESSAGES FROM BCM DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

No Messages From EATX

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with Transmission Control Module (TCM). If scan tool communicates with TCM, go to next step. If scan tool does not communicate with TCM, perform «NO RESPONSE FROM TRANSMISSION CONTROL MODULE OR BUS +/- SIGNALS OPEN»(ref-37884-S18222189142001011000000) test under COMMUNICATIONS SYSTEM.
2. Using scan tool, clear DTCs. Turn ignition off. Turn ignition on for approximately one minute. Using scan tool, retrieve DTCs. If NO MESSAGES FROM EATX DTC resets, replace instrument cluster. If NO MESSAGES FROM EATX DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

No Messages From PCM

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Attempt to start engine. If engine starts and idles, go to next step. If engine does not start and idle, repair no start condition as necessary. See appropriate BASIC DIAGNOSTIC PROCEDURES article in ENGINE PERFORMANCE.
2. Using scan tool, clear DTCs. Turn ignition off. Turn ignition on for approximately one minute. Using scan tool, retrieve DTCs. If NO MESSAGES FROM PCM DTC resets, replace instrument cluster. If NO MESSAGES FROM PCM DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

ABS Warning Indicator Not Operating Properly

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Using scan tool, attempt to communicate with Controller Anti-Lock Brake (CAB). If scan tool communicates with CAB, go to next step. If scan tool does not communicate with CAB, perform «NO RESPONSE FROM CONTROLLER ANTI-LOCK BRAKE»(ref-37884-S04053310272001011000000) test under COMMUNICATIONS SYSTEM.
2. Turn ignition on. Using scan tool, retrieve DTCs. If no DTCs exist, go to next step. If any DTCs exist, perform appropriate test. See «DIAGNOSTIC TROUBLE CODE IDENTIFICATION»(ref-37884-S09732796892001011000000) table under SELF-DIAGNOSTIC SYSTEM.
3. To start bulb test, turn ignition off, then on. If ABS warning indicator does not illuminate for 5-10 seconds, replace instrument cluster. If ABS warning indicator illuminates for 5-10 seconds, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

AIRBAG Warning Indicator Not Operating Properly

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Using scan tool, attempt to communicate with Occupant Restraint Controller (ORC). If scan tool communicates with ORC, go to next step. If scan tool does not communicate with ORC, perform «NO RESPONSE FROM OCCUPANT RESTRAINT CONTROLLER»(ref-37884-S34861455472001011000000) test under COMMUNICATIONS SYSTEM.
2. Turn ignition on. Using scan tool, retrieve ORC DTCs. If no ORC DTCs exist, go to next step. If any ORC DTCs exist, repair air bag system as necessary. For information on air bag DIAGNOSIS & TESTING, see AIR BAG SERVICE & REPAIR MANUAL, DOMESTIC & IMPORTED MODELS.
3. Turn ignition on. Using scan tool, retrieve DTCs. If no DTCs exist, go to next step. If any DTCs exist, perform appropriate test. See «DIAGNOSTIC TROUBLE CODE IDENTIFICATION»(ref-37884-S09732796892001011000000) table under SELF-DIAGNOSTIC SYSTEM.
4. To start bulb test, turn ignition off, then on. If AIRBAG warning indicator does not illuminate for 5-10 seconds, replace instrument cluster. If AIRBAG warning indicator illuminates for 5-10 seconds, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

All Gauges Not Operating Correctly

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Remove and inspect fuses No. 7 (20-amp) and No. 14 (10-amp) in junction block. (Scheme 38) If both fuses are okay, install fuses, and go to next step. If either fuse is open, repair power distribution circuit as necessary. See POWER DISTRIBUTION article in WIRING DIAGRAMS.
2. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select BODY, then BODY COMPUTER. If scan tool communicates with Body Control Module (BCM), go to next step. If scan tool does not communicate with BCM, perform «BUS +/- SIGNAL OPEN FROM BODY CONTROL MODULE»(ref-37884-S06574507812001011000000) test under COMMUNICATIONS SYSTEM.
3. Using scan tool, select ELECTRO/MECH CLUSTER. If scan tool communicates with instrument cluster, go to next step. If scan tool does not communicate with instrument cluster, perform «BUS +/- SIGNALS OPEN FROM INSTRUMENT CLUSTER»(ref-37884-S28746225992001011600000) test.
4. Turn ignition off. Disconnect instrument cluster connector C1. Connect a 12-volt test light between battery voltage and instrument cluster connector C1 terminal No. 6, ground circuit (Black/Light Green wire). (Scheme 16) If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open in Black/Light Green wire.
5. Disconnect instrument cluster connector C2. Turn ignition on. Connect a 12-volt test light between ground and instrument cluster connector C2 terminal No. 2, fused ignition switch output circuit (Dark Blue/White wire). If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open in Dark Blue/White wire.
6. Turn ignition off. Disconnect instrument cluster connector C1. Connect a 12-volt test light between ground and instrument cluster connector C1 terminal No. 1, fused B+ circuit (Pink wire). If test light illuminates brightly, replace instrument cluster. If test light does not illuminate brightly, repair open in Pink wire.

BRAKE Indicator Not Operating Properly

Note. Ensure parking brake is released when performing test procedures unless instructed otherwise.

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Check parking brake for interference, binding linkage and proper operation. Repair parking brake as necessary. See appropriate DISC & DRUM article in BRAKES. If parking brake is okay, go to next step.
2. If this test is being performed because BRAKE indicator does not illuminate with empty brake fluid reservoir, go to next step. If BRAKE indicator illuminates with empty brake fluid reservoir, go to step 6.
3. Turn ignition off. Disconnect 2-pin brake fluid level switch connector. Turn ignition on. Wait 10 seconds. Using a fused jumper wire, connect brake fluid level switch connector terminals "A", ground circuit (Black wire) and "B", BRAKE indicator driver circuit (Gray/Black wire). If BRAKE indicator does not illuminate, leave brake fluid level switch connector disconnected, and go to next step. If BRAKE indicator illuminates, replace brake fluid level switch.
4. Turn ignition off. Remove jumper wire. Disconnect instrument cluster connector C2. Measure resistance of BRAKE indicator driver circuit (Gray/Black wire) between brake fluid level switch connector terminal "B" and instrument cluster connector C2 terminal No. 3. (Scheme 16) If resistance is less than 5 ohms, leave brake fluid level switch connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Gray/Black wire.
5. Ensure instrument cluster connector C2 is properly connected. Turn ignition on. Wait 10 seconds. Connect jumper wire between ground and brake fluid level switch connector terminal "B", BRAKE indicator driver circuit (Gray/black wire). If BRAKE indicator illuminates, repair open in Black wire between brake fluid level switch and ground. If BRAKE indicator does not illuminate, replace instrument cluster.
6. Turn ignition on. If BRAKE indicator remains on after 10 seconds, go to next step. If BRAKE indicator does not illuminate, go to step 11.
7. Check brake fluid level. Fill brake fluid reservoir as necessary. If brake fluid is level is okay, go to next step.
8. Turn ignition off. Disconnect parking brake switch connector. Turn ignition on. If BRAKE indicator goes out after 10 seconds, replace parking brake switch. If BRAKE indicator remains on after 10 seconds, go to next step.
9. Turn ignition off. Ensure parking brake switch is properly connected. Disconnect brake fluid level switch connector. Turn ignition on. If BRAKE indicator goes out after 10 seconds, replace brake fluid level switch. If BRAKE indicator does not go out after 10 seconds, leave brake fluid level switch connector disconnected, and go to next step.
10. Turn ignition off. Disconnect parking brake switch connector. Measure resistance between ground and instrument cluster connector C2 terminal No. 3, BRAKE indicator driver circuit (Gray/Black wire). (Scheme 16) If resistance is more than 100 k/ohms, replace instrument cluster. If resistance is 100 k/ohms or less, repair short to ground in Gray/Black wire.
11. Turn ignition off, then on. Wait 10 seconds. Engage parking brake. If BRAKE indicator illuminates with parking brake engaged, go to next step. If brake indicator does not illuminate with parking brake engaged, go to step 13.
12. Release parking brake. Crank engine while observing BRAKE indicator. If BRAKE indicator does not illuminate while engine is cranking, replace instrument cluster. If BRAKE indicator illuminates when engine is cranking, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
13. Turn ignition off. Disconnect parking brake switch connector. Turn ignition on. Wait 10 seconds. Connect a fused jumper wire between ground and 1-pin parking brake switch connector, BRAKE indicator driver circuit (Gray/Black wire). If BRAKE indicator illuminates, replace parking brake switch. If BRAKE indicator does not illuminate, leave parking brake switch connector disconnected, and go to next step.
14. Turn ignition off. Disconnect instrument cluster connector C2. Measure resistance of BRAKE indicator driver circuit (Gray/Black wire) between parking brake switch connector and instrument cluster connector C2 terminal No. 3. (Scheme 16) If resistance is less than 5 ohms, replace instrument cluster. If resistance is 5 ohms or more, repair open in Gray/Black wire.

Charging Indicator Not Operating Properly

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, retrieve Powertrain Control Module (PCM) DTCs. If no PCM DTCs exist, go to next step. If any PCM DTCs exist, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
2. To start bulb test, turn ignition off, then on. If charging indicator illuminates for 3-10 seconds, go to next step. If charging indicator does not illuminate for 3-10 seconds, replace instrument cluster.
3. Check charging system operation. See appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS. Repair charging system as necessary. If charging system is operating properly, replace instrument cluster.

Cluster & Panel Illumination Problems

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with Mechanical Instrument Cluster (MIC). If scan tool communicates wit MIC, go to next step. If scan tool does not communicate with MIC, perform «MIC MESSAGES NOT RECEIVED»(ref-37884-S11120712592001011000000) test under COMMUNICATIONS SYSTEM.
2. Using scan tool, retrieve MIC DTCs. If no MIC DTCs exist, go to next step. If any MIC DTCs exist, perform appropriate test. See «DIAGNOSTIC TROUBLE CODE IDENTIFICATION»(ref-37884-S09732796892001011000000) table under SELF-DIAGNOSTIC SYSTEM.
3. Using scan tool, read DIMMING LEVEL voltage while rotating dimming level switch from low to high positions. If voltage changes from about 0.2 to 3.0 volts, go to next step. If voltage does not change from 0.2 to 3.0, perform «DIMMING LEVEL SWITCH FAILURE»(ref-37884-S00841591112001011000000) test.
4. Turn parking lights on. Rotate dimmer level switch from low to high positions while observing instrument panel lights. If instrument panel lights remain brightly illuminated with dimmer level switch in all positions, go to next step. If instrument panel lights do not remain brightly illuminated with dimmer level switch in all positions, go to step 7.
5. Turn parking lights off. Turn ignition off. After disconnecting following components/modules, rotate dimmer level switch from low to high positions while observing instrument panel lights. If instrument panel lights operate properly after disconnecting any component/module, replace that component/module. If instrument panel light do not operate after disconnecting all components/modules, ensure all components/modules are reconnected, and go to next step. Disconnect following components/modules (if equipped) one at a time, in order listed. Ashtray Light Connector Clock Connector PRND3L Light Connector Radio Gray Connector C2 Traction Control Switch Connector Headlight Switch Connector Temperature Control Module Connector
6. Turn ignition off. Disconnect instrument cluster connector C1. Turn ignition on. Measure voltage on instrument cluster connector C1 terminal No. 4, panel lights driver circuit (Orange wire). (Scheme 16) If voltage is more than 10 volts, repair short to voltage in Orange wire. If voltage is 10 volts or less, replace instrument cluster.
7. Using scan tool, retrieve MIC DTCs. If PANEL LAMPS DRIVER OUTPUT CIRCUIT SHORTED is retrieved, go to next step. If PANEL LAMPS DRIVER OUTPUT CIRCUIT SHORTED is not retrieved, replace instrument cluster.
8. Turn ignition off. Disconnect instrument cluster connector C1. Measure resistance between ground and instrument cluster connector C1 terminal No. 4, panel lights driver circuit (Orange wire). (Scheme 16) If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or more, replace instrument cluster.
9. Turn parking lights off. Turn ignition off. After disconnecting following components/modules, measure resistance between ground and panel light driver circuit (Gray/Black wire) at corresponding component/module connector. If resistance is more than 10 ohms after disconnecting any component/module, replace that component/module. If resistance is 10 ohms or less after disconnecting any components/modules, repair short to ground in Gray/Black wire from corresponding connector. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Disconnect following components/modules (if equipped) one at a time, in order listed. Ashtray Light Connector Clock Connector PRND3L Light Connector Radio Gray Connector C2 Traction Control Switch Connector Headlight Switch Connector Temperature Control Module Connector

Cruise On Indicator Not Operating Properly

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. To start bulb check, turn ignition off, then on. Observe cruise on indicator. If cruise on indicator illuminates for 3-10 seconds, go to next step. If cruise on indicator does not illuminate for 3-10 seconds, go to step 4 .
2. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, retrieve Powertrain Control Module (PCM) DTCs. If no PCM DTCs exist, go to next step. If any PCM DTCs exist, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
3. Test drive vehicle and operate cruise control. If cruise control operates properly, replace instrument cluster. If cruise control does not operate properly, see appropriate CRUISE CONTROL SYSTEMS article.
4. Turn ignition on. Using scan tool, attempt to communicate with Powertrain Control Module (PCM). If scan tool communicates with PCM, go to next step. If scan tool does not communicate with PCM, perform «NO RESPONSE FROM POWERTRAIN CONTROL MODULE (PCI BUS)»(ref-37884-S31456202182001011000000) test under COMMUNICATIONS SYSTEM.
5. Turn ignition off. Inspect cruise on indicator bulb and socket. Repair or replace indicator bulb and/or socket as necessary. If bulb and socket are okay, replace instrument cluster.

Deck Lid Ajar Indicator Not Operating

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Ensure deck lid is properly aligned and completely closed. Turn ignition on. If deck lid ajar indicator illuminates, go to next step. If deck lid ajar indicator does not illuminate, go to step 4.
2. Turn ignition off. Disconnect deck lid release solenoid/ajar switch connector. Turn ignition on. If deck lid ajar indicator illuminates, leave deck lid release solenoid/ajar switch connector disconnected, and go to next step. If deck lid ajar indicator does not illuminate, replace deck lid release solenoid/ajar switch.
3. Turn ignition off. Disconnect instrument cluster connector C2. Measure resistance between ground and instrument cluster connector C2 terminal No. 9, deck lid ajar switch sense circuit (Tan/Black wire). (Scheme 16) If resistance is less than 100 ohms, repair short to ground in Tan/Black wire. If resistance is 100 ohms or more, replace instrument cluster.
4. Open deck lid. If deck lid ajar indicator does not illuminate, go to next step. If deck lid ajar indicator illuminates, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
5. Turn ignition off. Disconnect deck lid release solenoid/ajar switch connector. Connect a fused jumper wire between ground and 2-pin deck lid release solenoid/ajar switch connector terminal No. 2, deck lid ajar switch sense circuit (Tan/Black wire). If deck lid ajar indicator illuminates, replace deck lid release solenoid/ajar switch. If deck lid ajar indicator does not illuminate, leave deck lid release solenoid/ajar switch connector disconnected, and go to next step.
6. Ensure ignition is off. Disconnect instrument cluster connector C2. Measure resistance of deck lid ajar switch sense circuit (Tan/Black wire) between deck lid release solenoid/ajar switch connector terminal No. 2 and instrument cluster connector C2 terminal No. 9. (Scheme 16) If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Tan/Black.
7. Disconnect instrument cluster connector C1. Measure voltage on instrument cluster connector C1 terminal No. 3, fused B+ circuit (Pink wire). (Scheme 16) If voltage is more than 10 volts, replace instrument cluster. If voltage is 10 volts or less, repair open in Pink wire.

Door Ajar Indicator Not Operating Properly

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Close all doors. To start bulb test, turn ignition off, then on. If door ajar indicator illuminates for 3-10 seconds, leave all doors closed, and go to next step. If door ajar indicator does not illuminate for 3-10 seconds, replace instrument cluster.
2. If door ajar indicator remains illuminated with all doors closed, leave all doors closed, and go to next step. If door ajar indicator does not remain illuminated with all doors closed, go to step 4 .
3. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select BODY, BODY COMPUTER, then INPUTS/OUTPUTS. Using scan tool, read DR DOOR AJAR SW and PASS DOOR AJAR SW status. If scan tool displays OPEN, replace instrument cluster. If scan tool does not display OPEN, repair door ajar system as necessary. Perform appropriate test under «DOOR AJAR SYSTEM»(ref-37884-S03975298622001012500000) .
4. Open driver and passenger doors. Using scan tool, read DR DOOR AJAR SW and PASS DOOR AJAR SW status. If scan tool displays CLOSED, go to next step. If scan tool displays OPEN, repair door ajar system as necessary. Perform appropriate test under «DOOR AJAR SYSTEM»(ref-37884-S03975298622001012500000) .
5. Close, then open each door while monitoring door ajar indicator. If door ajar indicator does not illuminate with doors open, replace instrument cluster. If door ajar indicator illuminates with door open, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Engine Coolant Temperature Indicator Not Operating Properly

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Start engine and allow it to reach until normal operating temperature. If engine temperature gauge operates properly, go to next step. If engine temperature gauge does not operate properly, perform «TEMPERATURE GAUGE NOT OPERATING PROPERLY»(ref-37884-S05035684382001011000000) test.
2. To start bulb teat, turn ignition off, then on. If engine coolant temperature indicator does not illuminate for 3-10 seconds, replace instrument cluster. If engine coolant temperature indicator illuminates for 3-10 seconds, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Engine Malfunction Indicator Light Not Operating Properly

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with Powertrain Control Module (PCM). If scan tool communicates with PCM, go to next step. If scan tool does not communicate with PCM established, perform «NO RESPONSE FROM POWERTRAIN CONTROL MODULE (PCI BUS)»(ref-37884-S31456202182001011000000) test under COMMUNICATIONS SYSTEM.
2. Using scan tool, retrieve Powertrain Control Module (PCM) DTCs. If any PCM DTCs exist, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If no PCM DTCs exist, replace instrument cluster.

Fuel Gauge Not Operating Properly

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select BODY, then BODY COMPUTER. Using scan tool, retrieve Body Control Module (BCM) DTCs. If FUEL LEVEL SENDING UNIT FAILURE DTC is retrieved, perform «FUEL LEVEL SENDING UNIT FAILURE»(ref-37884-S27904358862001011000000) test. If FUEL LEVEL SENDING UNIT FAILURE DTC is not retrieved, go to next step.
2. Turn ignition switch to LOCK position. To start gauges self-test, press and hold trip button on instrument cluster while turning ignition switch forward one position from LOCK to OFF position, then release trip button. If fuel gauge sweeps from empty to full, then back to empty, go to next step. If fuel gauge does not sweep from empty to full, then back to empty, replace instrument cluster.
3. Turn ignition on. If fuel gauge always shows empty, go to next step. If fuel gauge is always between full and empty, go to step 5. If fuel gauge always shows full, go to step 7.
4. Turn ignition off. Remove rear seat and disconnect C308 Black connector. Turn ignition on. Connect a fused jumper wire between ground and C308 Black connector terminal No. 3, fuel level sensor signal circuit (Dark Blue wire). (Scheme 40) If fuel gauge does not read full, replace instrument cluster. If fuel gauge reads full, remove and inspect fuel pump module for a stuck float arm. Repair float arm as necessary. If float arm is okay, replace fuel pump module.
5. Turn ignition off. Disconnect BCM connector C4. Measure resistance between ground and BCM connector C4 terminal No. 7, fuel level sensor signal circuit (Dark Blue wire) with appropriate amount of fuel in fuel tank. See «FUEL LEVEL SENSOR RESISTANCE»(ref-37884-S18186188732001011000000) table. (Scheme 8) If resistance is as specified, replace instrument cluster. If resistance is not as specified, go to next step. FUEL LEVEL SENSOR RESISTANCE Fuel Level Ohms Sensor Full Stop 50-70 Gauge Full Stop 115-145 3/4 310-370 1/2 520-580 1/4 730-790 Gauge Empty Stop 890-950 Sensor Empty Stop 1040-1060
6. Remove and inspect fuel pump module for a stuck float arm. Inspect fuel tank for foreign materials. Repair or replace as necessary. If float arm and fuel tank are okay, replace fuel pump module.
7. Turn ignition off. Remove rear seat. Disconnect C308 Black connector. Turn ignition on. Using scan tool, read FUEL LEVEL voltage. If voltage is more than 9 volts, leave C308 Black connector disconnected, and go to next step. If voltage is 9 volts or less, go to step 9.
8. Ensure ignition is on. If fuel gauge does not read empty, replace instrument cluster. If fuel gauge reads empty, check wiring between C308 Black connector and fuel pump module. Repair wiring as necessary. If wiring is okay, replace fuel pump module.
9. Turn ignition off. Disconnect Body Control Module (BCM) connector C4. Measure resistance between ground and BCM connector C4 terminal No. 7, fuel level sensor signal circuit (Dark Blue wire). (Scheme 8) If resistance is more than 100 k/ohms, replace BCM. If resistance is 100 k/ohms or less, repair short to ground in Dark Blue wire.

Low Fuel Indicator Not Operating Properly

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Start engine and observe fuel gauge operation. If fuel gauge operates properly, go to next step. If fuel gauge does not operate properly, perform «FUEL GAUGE NOT OPERATING PROPERLY»(ref-37884-S31683318832001011000000) test.
2. To start bulb test, turn ignition off, then on. Observe low fuel indicator. If low fuel indicator does not illuminate for 3-10 seconds, replace instrument cluster. If low fuel indicator illuminates for 3-10 seconds, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Odometer Not Operating Properly

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with Mechanical Instrument Cluster (MIC). If scan tool communicates with MIC, go to next step. If scan tool does not communicate with MIC, perform «MIC MESSAGES NOT RECEIVED»(ref-37884-S11120712592001011000000) test under COMMUNICATIONS SYSTEM.
2. Using scan tool, attempt to communicate with Transmission Control Module (TCM). If scan tool communicates with TCM go to next step. If scan tool does not communicate with TCM, perform «NO RESPONSE FROM TRANSMISSION CONTROL MODULE OR BUS +/- SIGNALS OPEN»(ref-37884-S18222189142001011000000) test under COMMUNICATIONS SYSTEM.
3. Turn ignition off. Turn ignition on while observing odometer segments. If all odometer segments do not illuminate, replace instrument cluster. If all odometer segments illuminate, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Oil Pressure Warning Indicator Not Operating Properly

Note. Before proceeding with this test, ensure oil level is correct.

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition on. Observe oil level indicator. If oil level indicator illuminates, go to next step. If oil level indicator does not illuminate, go to step 5.
2. Turn ignition off. Disconnect oil pressure switch connector. Turn ignition on. If oil level indicator does not illuminate, go to next step. If oil level indicator illuminates, go to step 4.
3. Turn ignition off. Remove oil pressure switch. Install mechanical oil pressure gauge. Start engine and let it idle. If oil pressure is 4 psi (.3 bar) or more, replace oil pressure switch. If oil pressure is less than 4 psi (.3 bar), repair engine oiling system as necessary. See appropriate article in ENGINES.
4. Turn ignition off. Disconnect oil pressure switch connector. Disconnect instrument cluster connector C2. Measure resistance between ground and instrument cluster connector C2 terminal No. 10, oil pressure switch sense circuit (Gray wire). (Scheme 16) If resistance is more than 100 k/ohms, replace instrument cluster. If resistance is 100 k/ohms or less, repair short to ground in Gray wire.
5. Turn ignition off. Disconnect oil pressure switch connector. Connect a fused jumper wire between ground and oil pressure switch connector terminal No. 1, engine oil pressure switch sense circuit (Gray wire). Turn ignition on. If oil level indicator does not illuminate, leave oil pressure switch connector disconnected, and go to next step. If oil level indicator illuminates, replace oil pressure switch.
6. Turn ignition off. Disconnect instrument cluster connector C2. Measure resistance of oil pressure switch sense circuit (Gray wire) between instrument cluster connector C2 terminal No. 10 and oil pressure switch connector. (Scheme 16) If resistance is less than 5 ohms, replace instrument cluster. If resistance is 5 ohms or more, repair open in Gray wire.

PRND3L Indicator Malfunctions

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with Mechanical Instrument Cluster (MIC). If scan communicates with MIC, go to next step. If scan tool does not communicate with MIC perform «MIC MESSAGES NOT RECEIVED»(ref-37884-S11120712592001011000000) test under COMMUNICATIONS SYSTEM.
2. Turn ignition off. Turn ignition on while observing PRND3L display. If all PRND3L indicators illuminate, go to next step. If any PRND3L indicators do not illuminate, replace instrument cluster.
3. Using scan tool, select TRANSMISSION, MONITOR DISPLAY, SHIFT LEVER, then SLP. Monitor SHIFT LEVER status. Engage parking brake. Shift gear selector thought all gear positions. If scan tool display agrees with gear selected, replace instrument cluster. If scan tool display does not agree with gear selected, repair transmission range sensor input to TCM. See appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS.

Seat Belt Indicator Not Operating Properly

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. To start bulb test, turn ignition off, then on. If seat belt indicator illuminates, go to next step. If seat belt indicator does not illuminate, replace instrument cluster.
2. Turn ignition off. Buckle driver seat belt. Turn ignition on. If seat belt indicator goes out, go to next step. If seat belt indicator does not go out, go to step 8.
3. Unbuckle driver seat belt. If seat belt indicator does not illuminate, go to next step. If seat belt indicator illuminates, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
4. Turn ignition off. Ensure driver seat belt is unbuckled. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, read SEAT BELT SWITCH status. If scan tool displays CLOSED, replace instrument cluster. If scan tool displays OPEN, go to next step.
5. Turn ignition off. Disconnect 2-pin seat belt switch connector. Measure resistance between ground and seat belt switch connector terminal No.2, ground circuit (Black/Light Green wire). If resistance is less than 5 ohms, leave seat belt switch connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Black/Light Green wire.
6. Connect a fused jumper wire between seat belt switch connector terminal No. 1, seat belt switch sense circuit (Light Green/Red wire) and No. 2, ground circuit (Black/Light Green wire). Using scan tool, read SEAT BELT SWITCH status. If scan tool displays CLOSED, replace seat belt switch. If scan tool displays OPEN, leave seat belt switch connector disconnected, and go to next step.
7. Ensure ignition is off. Disconnect Body Control Module (BCM) connector C4. Measure resistance in seat belt switch sense circuit (Light Green/Red wire) between BCM connector C4 terminal No. 15 and seat belt switch connector terminal No. 1. (Scheme 8) If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Light Green/Red wire.
8. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Buckle driver seat belt. Using scan tool, read SEAT BELT SWITCH status. If scan tool displays OPEN, replace instrument cluster. If scan tool does not display OPEN, go to next step.
9. Disconnect seat belt switch connector. Using scan tool, read SEAT BELT SWITCH status. If scan tool displays OPEN is displayed, replace seat belt switch. If scan tool does not display OPEN, leave seat belt switch connector disconnected, and go to next step.
10. Turn ignition off. Disconnect Body Control Module (BCM) connector C4. Measure resistance between ground and BCM connector C4, terminal No. 15, seat belt switch sense circuit (Light Green/Red wire). (Scheme 8) If resistance is less than 100 ohms, repair short to ground in Light Green/Red wire. If resistance is 100 ohms or more, replace BCM.

Speedometer Gauge Not Operating Properly

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with Powertrain Control Module (PCM). If scan tool communicates with PCM, go to next step. If scan tool does not communicate with PCM, perform «NO RESPONSE FROM POWERTRAIN CONTROL MODULE (PCI BUS)»(ref-37884-S31456202182001011000000) test under COMMUNICATIONS SYSTEM.
2. Turn ignition off. To start gauges self-test, press and hold trip button on instrument cluster while turning ignition switch forward one position from LOCK to OFF position, then release trip button. If speedometer sweeps from zero MPH to 120 MPH then back to zero MPH, go to next step. If speedometer does not sweep from zero MPH to 120 MPH then back to zero MPH, replace instrument cluster.
3. Using scan tool, retrieve PCM DTCs. If any PCM DTCs exist, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If no PCM DTCs exist, go to next step.
4. Raise and support vehicle. Start engine. Turn traction control off (if equipped). Using scan tool in ENGINE SENSORS, monitor VEHICLE SPEED. Place gear shift lever in Drive and accelerate vehicle. If vehicle speed increases on display, go to next step. If vehicle speed does not increase on display, repair vehicle speed signal as necessary. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
5. Using scan tool in ELECTRO/MECH CLUSTER, monitor VEHICLE SPEED. Accelerate vehicle. If vehicle speed increases on display, replace instrument cluster. If vehicle speed does not increase on display, replace PCM.

Tachometer Not Operating Properly

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with Powertrain Control Module (PCM). If scan tool communicates with PCM, go to next step. If scan tool does not communicate with PCM, perform «NO RESPONSE FROM POWERTRAIN CONTROL MODULE (PCI BUS)»(ref-37884-S31456202182001011000000) test under COMMUNICATIONS SYSTEM.
2. Turn ignition off. To start gauges self-test, press and hold trip button on instrument cluster while turning ignition switch forward one position from LOCK to OFF position, then release trip button. If tachometer sweeps from zero RPM to 6000 RPM then back to zero RPM, go to next step. If tachometer does not sweep from zero RPM to 6000 RPM then back to zero RPM, replace instrument cluster.
3. Using scan tool, retrieve PCM DTCs. If no PCM DTCs exist, go to next step. If any PCM DTCs exist, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
4. Start engine. Using scan tool, select ENGINE, then sensors. Read ENGINE RPM. If scan tool displays more than 400 RPM, leave engine running, and go to next step. If scan tool displays 400 RPM or less, replace PCM.
5. Using scan tool, select BODY, ELECTRO/MECH CLUSTER. Read ENGINE RPM. If scan tool displays more than 400 RPM, replace instrument cluster. If scan tool displays 400 RPM or less, replace PCM.

Temperature Gauge Not Operating Properly

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with Powertrain Control Module (PCM). If scan tool communicates with PCM, go to next step. If scan tool does not communicate with PCM, perform «NO RESPONSE FROM POWERTRAIN CONTROL MODULE (PCI BUS)»(ref-37884-S31456202182001011000000) test under COMMUNICATIONS SYSTEM.
2. Turn ignition off. To start gauges self-test, press and hold trip button on instrument cluster while turning ignition switch forward one position from LOCK to OFF position, then release trip button. If temperature gauge sweeps from "C" to "H" then back to "C", go to next step. If temperature gauge does not sweep from "C" to "H" then back to "C", replace instrument cluster.
3. Using scan tool, retrieve PCM DTCs. If no PCM DTCs exist, go to next step. If any PCM DTCs exist, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
4. Start engine. Using scan tool, select ENGINE, then sensors. Read ENGINE TEMPERATURE. If approximately the correct engine temperature is displayed, leave engine running, and go to next step. If approximately the correct engine temperature is not displayed, replace PCM.
5. Using scan tool, select BODY, ELECTRO/MECH CLUSTER. Read ENGINE TEMPERATURE. If approximately the correct engine temperature is displayed, replace instrument cluster. If approximately the correct engine temperature is not displayed, replace PCM.

INTERIOR LIGHTING SYSTEMS

Note. For interior lighting systems wiring diagrams, see ILLUMINATION/INTERIOR LIGHTS article.

Courtesy Light Output Short To Battery

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect junction block connector C11. (Scheme 38) Turn ignition on. If all courtesy lights except overhead console lights illuminate, go to next step. If all courtesy lights do not illuminate and overhead console lights illuminates, leave junction block connector C11 disconnected, and go to step 3.
2. Turn ignition off. Ensure junction block connector C11 is properly reconnected. Turn ignition on. Turn on all overhead console lights with each individual switch. If any light fails to illuminate using individual switch, replace appropriate light bulb. If all lights illuminate using individual switch, repair short to voltage in courtesy light driver circuit (Yellow wire) between junction block and overhead console.
3. Turn ignition off. Remove Body Control Module (BCM) from back of junction block. Remove driver door courtesy light bulb. Turn ignition on. Measure voltage on driver door courtesy light bulb 2-pin socket terminal No. 1, courtesy light driver circuit (Yellow wire). If voltage exists, repair short to voltage in Yellow wire. If voltage does not exist, replace BCM.

Courtesy LTS INOP

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Perform appropriate DOOR AJAR CKT OPEN test(s) under DOOR AJAR SYSTEM .

Courtesy Lights Inoperative From Driver Door

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Perform DRIVER DOOR AJAR CKT OPEN test under DOOR AJAR SYSTEM.

Courtesy Lights Inoperative (All Lights)

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Using a voltmeter, backprobe junction block connector C11 terminal No. 6, fused B+ circuit (Pink wire). (Scheme 38) If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, replace junction block.
2. Remove and inspect fuse No. 19 in junction block. If fuse is open, replace fuse. If fuse is okay, go to next step.
3. Using a fused jumper wire connected to ground, backprobe junction block connector C11 terminal No. 8, courtesy lights driver circuit. (Yellow wire). If overhead courtesy lights illuminate, replace Body Control Module (BCM). If overhead courtesy lights do not illuminate, repair open in Yellow wire.

Courtesy Lights Inoperative (Door Lights Only)

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Remove driver door courtesy light lens. Disconnect driver door courtesy light connector. Measure voltage on driver door light courtesy light 2-pin connector terminal No. 2, fused B+ circuit (Pink wire). If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open in Pink wire.
2. Reconnect driver door courtesy light connector. Disconnect junction block connector C6. (Scheme 9) Connect a fused jumper wire between ground and junction block connector C6 terminal No. 8, courtesy lights driver circuit (Yellow wire). If door courtesy lights illuminate, replace junction block. If door courtesy lights do not illuminate, repair open in Yellow wire.

Courtesy Lights Inoperative (Overhead Lights Only)

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Using a voltmeter, backprobe junction block connector C11 terminal No. 6, fused B+ circuit (Pink wire). (Scheme 38) If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, replace junction block.
2. Remove and inspect fuse No. 19 in junction block. If fuse is open, replace fuse. If fuse is okay, go to next step.
3. Using a fused jumper wire connected to ground, backprobe junction block connector C11 terminal No. 8, courtesy lights driver circuit. (Yellow wire). If overhead courtesy lights do not illuminate, repair open in Yellow wire. If overhead courtesy lights illuminate, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Courtesy Lights Inoperative From Dome Light Switch

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Ensure all doors are closed. Ensure courtesy light switch is off. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Using scan tool, read COURTESY LIGHT status. Rotate courtesy light switch to ON position. If scan tool displays ON, replace headlight switch. If scan tool does not display ON, replace BCM.

Courtesy Lights Inoperative From Left Rear Door

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Perform LEFT REAR DOOR AJAR CKT OPEN test under DOOR AJAR SYSTEM.

Courtesy Lights Inoperative From Passenger Door

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Perform PASS DOOR AJAR CKT OPEN test under DOOR AJAR SYSTEM.

Courtesy Lights Inoperative From Right Rear Door

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Perform RIGHT REAR DOOR AJAR CKT OPEN test under DOOR AJAR SYSTEM.

Courtesy Lights Stay On At All Times

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Close driver door. Using scan tool, read DR DOOR AJAR SWITCH status. If scan tool displays OPEN, go to next step. If scan tool does not display OPEN, go to step 6.
2. Close all doors. Using scan tool, read DOOR AJAR SWITCH status. If scan tool displays OPEN, go to next step. If scan tool does not display OPEN, go to step 4.
3. Ensure courtesy lights switch is off. Disconnect junction block connector C11. (Scheme 38) Ensure all doors are closed. Lock driver door. If door courtesy lights go out, repair short to ground in courtesy light driver circuit (Yellow wire) between junction block and overhead console. If door courtesy lights do not go out, go to next step.
4. Using scan tool, read DOOR AJAR SWITCH status while disconnecting each door lock motor/ajar switch connector except driver door. If scan tool display does not change when a connector is disconnected, go to next step. If scan tool display changes when a connector is disconnected, replace appropriate door lock motor/ajar switch.
5. Ensure ignition is off. Disconnect Body Control Module (BCM) connector C4. Disconnect all door lock motor/ajar switch connectors except driver door. Measure resistance between ground and each BCM connector C4 passenger door ajar switch sense circuit terminal (Tan/Red wires). See «PASSENGER DOOR AJAR SWITCH SENSE CIRCUITS»(ref-37884-S26072880832001022200000) table. (Scheme 8) If any resistance is less than 100 ohms, repair short to ground in Tan/Red wire between BCM and appropriate door lock motor/ajar switch. If all resistances are 100 ohms or more, leave BCM connector C4 disconnected, and go to next step. PASSENGER DOOR AJAR SWITCH SENSE CIRCUITS Application Terminal No. Left Rear 1 Right Front 2 Right Rear 10
6. Ensure ignition is off. Disconnect driver door lock motor/ajar switch connector. Measure resistance between ground and BCM connector C4 terminal No. 4, driver door ajar switch sense circuit (Tan wire). (Scheme 8) If resistance is less than 100 ohms, repair short to ground in Tan wire. If resistance is 100 ohms or more, leave BCM connector C4 disconnected, and go to next step.
7. Ensure driver door lock motor/ajar switch connector is properly connected. Close and lock driver door. Measure resistance between ground and BCM connector C4 terminal No. 4, driver door ajar switch sense circuit (Tan wire). If resistance is less than 5 ohms, replace driver door lock motor/ajar switch. If resistance is 5 ohms or more, replace BCM.

MEMORY SYSTEMS

Note. For memory mirror system wiring diagrams, see appropriate POWER MIRRORS article. For memory seat system wiring diagrams, see appropriate POWER SEATS article.

Charging Voltage High

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, retrieve Powertrain Control Module (PCM) DTCs. If no PCM DTCs exist, go to next step. If any PCM DTCs exist, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
2. Using scan tool, clear CHARGING VOLTAGE HIGH DTC from Memory Heated Seat/Mirror Module (MHSMM). Turn ignition off, then start engine. Wait one minute. Using scan tool, retrieve MHSMM DTCs. If CHARGING VOLTAGE HIGH DTC resets, go to next step. If CHARGING VOLTAGE HIGH DTC does not reset, test is complete. Perform «MEMORY SYSTEMS VERIFICATION TEST»(ref-37884-S40557765872001011000000) under VERIFICATION TESTS.
3. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, replace MHSMM.

Charging Voltage Low

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, retrieve Powertrain Control Module (PCM) DTCs. If no PCM DTCs exist, go to next step. If any PCM DTCs exist, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
2. Using scan tool, clear CHARGING VOLTAGE LOW DTC from Memory Heated Seat/Mirror Module (MHSMM). Turn ignition off, then start engine. Wait one minute. Using scan tool, retrieve MHSMM DTCs. If CHARGING VOLTAGE LOW DTC resets, go to next step. If CHARGING VOLTAGE LOW DTC does not reset, test is complete. Perform «MEMORY SYSTEMS VERIFICATION TEST»(ref-37884-S40557765872001011000000) under VERIFICATION TESTS.
3. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, replace MHSMM.

Driver Mirror Horizontal Sensor Out Of Range High

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Turn ignition on. Measure voltage on MHSMM connector C1 terminal No. 20, driver mirror horizontal position signal circuit (Dark Blue/Yellow wire). (Scheme 17) If voltage is more than 4.5 volts, leave MHSMM connector C1 disconnected, and go to next step. If voltage is 4.5 volts or less, replace MHSMM.
2. Turn ignition off. Disconnect driver mirror connector. Turn ignition on. Measure voltage on driver mirror connector terminal No. 9, driver mirror horizontal position signal circuit (Dark Blue/Yellow wire). (Scheme 41) If any voltage exists, repair short to voltage in Dark Blue/Yellow wire. If no voltage exists, replace driver mirror.

Scheme 40

Driver Mirror Horizontal Sensor Out Of Range Low

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Turn ignition on. Measure voltage on MHSMM connector C1 terminal No. 20, driver mirror horizontal position signal circuit (Dark Blue/Yellow wire). (Scheme 17) If voltage is 4.5-5.0 volts, replace MHSMM. If voltage is not 4.5-5.0 volts, leave MHSMM connector C1 disconnected, and go to next step.
2. Turn ignition off. Disconnect driver mirror connector. Measure resistance of driver mirror horizontal position signal circuit (Dark Blue/Yellow wire) between driver mirror connector terminal No. 9 and MHSMM connector C1 terminal No. 20. (Scheme 17)and (Scheme 41). If resistance is less than 5 ohms, leave connectors disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Dark Blue/Yellow wire.
3. Measure resistance between ground and driver mirror connector terminal No. 9, driver mirror horizontal position signal circuit (Dark Blue/Yellow wire). If resistance is less than 100 ohms, repair short to ground in Dark Blue/Yellow wire. If resistance is 100 ohms or more, leave driver mirror connector disconnected, and go to next step.
4. Ensure MHSMM connector is properly connected. Turn ignition on. Measure voltage on driver mirror connector terminal No. 6, driver mirror 5-volt supply circuit (Gray/Light Blue wire). If voltage is 4.5-5.0 volts, replace driver mirror. If voltage is not 5.5-5.0 volts, leave driver mirror connector disconnected, and go to next step.
5. Turn ignition off. Disconnect MHSMM connector C2. Measure resistance of driver mirror 5-volt supply circuit (Gray/Light Blue wire) between driver mirror connector terminal 6 and MHSMM connector C2 terminal No. 7. If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, repair open in Gray/Light Blue wire.

Driver Mirror Vertical Sensor Out Of Range High

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Turn ignition on. Measure voltage on MHSMM connector C1 terminal No. 7, driver mirror vertical position signal circuit (Yellow/Orange wire). (Scheme 17) If voltage is more than 4.5 volts, leave MHSMM connector C1 disconnected, and go to next step. If voltage is 4.5 volts or less, replace MHSMM.
2. Turn ignition off. Disconnect driver mirror connector. Turn ignition on. Measure voltage on driver mirror connector terminal No. 7, driver mirror vertical position signal circuit (Yellow/Orange wire). (Scheme 41) If any voltage exists, repair short to voltage in Yellow/Orange wire. If no voltage exists, replace driver mirror.

Driver Mirror Vertical Sensor Out Of Range Low

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Turn ignition on. Measure voltage on MHSMM connector C1 terminal No. 7, driver mirror vertical position signal circuit (Yellow/Orange wire). (Scheme 17) If voltage is 4.5-5.0 volts, replace MHSMM. If voltage is not 4.5-5.0 volts, leave MHSMM connector C1 disconnected, and go to next step.
2. Turn ignition off. Disconnect driver mirror connector. Measure resistance of driver mirror vertical position signal circuit (Yellow/Orange wire) between driver mirror connector terminal No. 7 and MHSMM connector C1 terminal No. 7. (Scheme 41) If resistance is less than 5 ohms, leave connectors disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Yellow/Orange wire.
3. Measure resistance between ground and driver mirror connector terminal No. 7, driver mirror horizontal position signal circuit (Yellow/Orange wire). If resistance is less than 100 ohms, repair short to ground in Yellow/Orange wire. If resistance is 100 ohms or more, leave driver mirror connector disconnected, and go to next step.
4. Ensure MHSMM connector is properly connected. Turn ignition on. Measure voltage on driver mirror connector terminal No. 6, driver mirror 5-volt supply circuit (Gray/Light Blue). If voltage is 4.5-5.0 volts, replace driver mirror. If voltage is not 5.5-5.0 volts, leave driver mirror connector disconnected, and go to next step.
5. Turn ignition off. Disconnect MHSMM connector C2. Measure resistance of driver mirror 5-volt supply circuit (Gray/Light Blue wire) between driver mirror connector terminal 6 and MHSMM connector C2 terminal No. 7. If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, repair open in Gray/Light Blue wire.

EEPROM Refresh Failure

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

Replace Memory Heated Seat/Mirror Module (MHSMM).

Front Riser Down Position Stuck

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect power seat switch connector. Turn ignition on. Measure voltage on power seat switch connector terminal No. 6, seat front down switch sense circuit (Red/Light Green wire). (Scheme 42) If any voltage exists, leave power seat switch connector disconnected, and go to next step. If no voltage exists, replace power seat switch.
2. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Turn ignition on. Measure voltage on MHSMM connector C1 terminal No. 8, seat front down switch sense circuit (Red/Light Green wire). (Scheme 17) If any voltage exists, repair short to voltage in Red/Light Green wire. If no voltage exists, replace MHSMM.

Scheme 41

Front Riser Sensor Out Of Range High

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect driver power seat front riser motor sensor connector. Measure resistance between ground and driver power seat front riser motor sensor connector terminal "A", seat position sensor ground circuit (Brown/Red wire). (Scheme 43) If resistance is 5 ohms or more, leave driver power seat front riser motor sensor connector disconnected, and go to next step. If resistance is less than 5 ohms, go to step 3.
2. Ensure ignition is off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C2. Measure resistance of seat position sensor ground circuit (Brown/Red wire) between driver power seat front riser motor sensor connector terminal "A" and MHSMM connector C2 terminal No. 16. (Scheme 17)and (Scheme 43). If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, repair open in Brown/Red wire.
3. Ensure driver power seat front riser motor sensor connector is properly connected. Ensure all other power seat motor sensor connectors are connected. Ensure front riser motor is operational. Connect scan tool to Data Link Connector (DLC). Using scan tool, monitor FRONT RISER POSITION SENSOR voltage while operating front riser motor to both limits. If voltage is more than 8 volts while motor is operating, replace seat track assembly. If voltage is not more than 8 volts while motor is operating, go to next step.
4. Turn ignition off. Disconnect driver power seat front riser motor sensor connector. Turn ignition on. Measure voltage between ground and driver power seat front riser motor sensor connector terminal "C", seat sensor 5-volt supply circuit (Brown/White wire). If voltage is more than 5.5 volts, repair short to voltage in Brown/White wire. If voltage is 5.5 volts or less, leave front riser motor sensor connector disconnected, and go to next step.
5. Turn ignition off. Disconnect MHSMM connector C1. Turn ignition on. Measure voltage between ground and MHSMM connector C1 terminal No. 15, front riser position signal circuit (Brown wire). (Scheme 17) If voltage is more than 0.2 volt, repair short to voltage in Brown wire. If voltage is 0.2 volt or less, leave front riser motor sensor connector disconnected, and go to next step.
6. Turn ignition off. Ensure MHSMM connector C1 is properly connected. Turn ignition on. Using scan tool, read FRONT RISER POSITION SENSOR voltage. If voltage more than 0.2 volt, replace MHSMM. If voltage is 0.2 volt or less, replace seat track assembly.

Scheme 42

Front Riser Sensor Out Of Range Low

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Ensure Memory Heated Seat/Mirror Module (MHSMM) is properly connected. Disconnect driver power seat front riser motor sensor connector. Turn ignition on. Measure voltage on driver power seat front riser motor sensor connector terminal "C", seat sensor 5-volt supply circuit (Brown/White wire). (Scheme 43) If voltage is more than 4.5 volts, leave driver power seat front riser motor sensor connector disconnected, and go to step 4. If voltage is 4.5 volts or less, leave driver power seat front riser motor sensor connector disconnected, and go to next step.
2. Turn ignition off. Disconnect MHSMM connector C2. Measure resistance of seat sensor 5-volt supply circuit (Brown/White wire) between driver power seat front riser motor sensor connector terminal "C" and MHSMM connector C2 terminal No. 6. (Scheme 17)and (Scheme 43). If resistance is less than 5 ohms, leave MHSMM connector C2 disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Brown/White wire.
3. Measure resistance between ground and MHSMM connector C2 terminal No. 6, seat sensor 5-volt supply circuit (Brown/White wire). If resistance is less than 100 ohms, repair short to ground in Brown/White wire. If resistance is 100 ohms or more, replace MHSMM.
4. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, monitor FRONT RISER POSITION SENSOR voltage. Connect a fused jumper wire between driver power seat front riser motor sensor connector terminal "C", seat sensor 5-volt supply circuit (Brown/White wire) and terminal "B", front riser position signal circuit (Brown wire). If voltage is more than 4.5 volts, replace seat track assembly. If voltage is 4.5 volts or less, leave driver power seat front riser motor sensor connector disconnected, and go to next step.
5. Ensure ignition is off. Disconnect MHSMM connector C1. Measure resistance between ground and MHSMM connector C1 terminal No. 15, front riser position signal circuit (Brown wire). (Scheme 17) If resistance is less than 5 ohms, leave connectors disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Brown wire.
6. Measure resistance between ground and MHSMM connector C1 terminal No. 15, front riser position signal circuit (Brown wire). If resistance is less than 100 ohms, repair short to ground in Brown wire. If resistance is 100 ohms or more, replace MHSMM.

Front Riser Up Position Stuck

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect power seat switch connector. Turn ignition on. Measure voltage on power seat switch connector terminal No. 9, seat front up switch sense circuit (Yellow/Light Green wire). (Scheme 42) If any voltage exists, leave power seat switch connector disconnected, and go to next step. If no voltage exists, replace power seat switch.
2. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Turn ignition on. Measure voltage between ground and MHSMM connector C1 terminal No. 21, seat front up switch sense circuit (Yellow/Light Green wire). (Scheme 17) If any voltage exists, repair short to voltage in Yellow/Light Green wire. If no voltage exists, replace MHSMM.

Horizontal Forward Position Stuck

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect power seat switch connector. Turn ignition on. Measure voltage on power seat switch connector terminal No. 10, seat horizontal forward switch sense circuit (Yellow/Light Blue wire). (Scheme 42) If any voltage exists, leave power seat switch connector disconnected, and go to next step. If no voltage exists, replace power seat switch.
2. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Measure voltage between ground and MHSMM connector C1 terminal No. 10, seat horizontal forward switch sense circuit (Yellow/Light Blue wire). (Scheme 17) If any voltage exists, repair short to voltage in Yellow/Light Blue wire. If no voltage exists, replace MHSMM.

Horizontal Rearward Position Stuck

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect power seat switch connector. Turn ignition on. Measure voltage on power seat switch connector terminal No. 3, seat horizontal rearward switch sense circuit (Red/Light Blue wire). (Scheme 42) If any voltage exists, leave power seat switch connector disconnected, and go to next step. If no voltage exists, replace power seat switch.
2. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Measure voltage between ground and MHSMM connector C1 terminal No. 23, seat horizontal rearward switch sense circuit (Red/Light Blue wire). (Scheme 17) If any voltage exists, repair short to voltage in Red/Light Blue wire. If no voltage exists, replace MHSMM.

Horizontal Sensor Out Of Range High

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect driver power seat horizontal motor sensor connector. Measure resistance between ground and driver power seat horizontal motor sensor connector terminal "A", ground circuit (Brown/Red wire). (Scheme 43) If resistance is 5 ohms or more, leave driver power seat horizontal motor sensor connector disconnected, and go to next step. If resistance is less than 5 ohms, go to step 3.
2. Ensure ignition is off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C2. Measure resistance of ground circuit (Brown/Red wire) between driver power seat horizontal motor sensor connector terminal "A" and MHSMM connector C2 terminal No. 16. (Scheme 17)and (Scheme 43). If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, repair open in Brown/Red wire.
3. Ensure all seat connectors are properly connected. Ensure horizontal motor is operational. Connect scan tool to Data Link Connector (DLC). Using scan tool, monitor HORIZONTAL POSITION SENSOR voltage while operating horizontal motor to both limits. If voltage display is never more than 8 volts while motor is operating, go to next step. If voltage display is more than 8 volts while motor is operating, replace seat track assembly.
4. Ensure ignition is off. Disconnect driver power seat horizontal motor sensor connector. Turn ignition on. Measure voltage between ground and driver power seat horizontal motor sensor connector terminal "C", seat sensor 5-volt supply circuit (Brown/White wire). If voltage is more than 5.5 volts, repair short to voltage in Brown/White wire. If voltage is 5.5 volts or less, leave driver power seat horizontal motor sensor connector, and go to next step.
5. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Turn ignition on. Measure voltage between ground and MHSMM connector C1 terminal No. 2, seat horizontal position sensor signal circuit (Violet/Red wire). (Scheme 17) If any voltage exists, repair short to voltage in Violet/Red wire. If no voltage exists, leave driver power seat horizontal motor sensor connector disconnected, and go to next step.
6. Turn ignition off. Ensure MHSMM connector C1 is properly connected. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, monitor HORIZONTAL POSITION SENSOR voltage. If voltage is more than 0.2, replace MHSMM. If voltage is 0.2 volt or less, replace seat track assembly.

Horizontal Sensor Out Of Range Low

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Ensure Memory Heated Seat/Mirror Module (MHSMM) is properly connected. Disconnect driver power seat horizontal motor sensor connector. Turn ignition on. Measure voltage on driver power seat horizontal motor sensor connector terminal "C", seat sensor 5-volt supply circuit (Brown/White wire). (Scheme 43) If voltage is 4.5 volts or less, go to next step. If voltage is more than 4.5 volts, go to step 4.
2. Turn ignition off. Disconnect MHSMM connector C2. Measure resistance between ground and MHSMM connector C2 terminal No. 6, seat sensor 5-volt supply circuit (Brown/White wire). (Scheme 17) If resistance is 100 ohms or more, leave MHSMM connector C2 disconnected, and go to next step. If resistance is less than 100 ohms, repair short to ground in Brown/White wire.
3. Disconnect driver power seat horizontal motor sensor connector. Measure resistance of seat sensor 5-volt supply circuit (Brown/White wire) between MHSMM connector C2 terminal No. 6 and driver power seat horizontal motor sensor connector terminal "C". (Scheme 17)and (Scheme 43). If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, repair open in Brown/White wire.
4. Turn ignition off. Disconnect driver power seat horizontal motor sensor connector. Connect a fused jumper wire between driver power seat horizontal motor sensor connector terminal "B", seat horizontal position signal circuit (Violet/Red wire) and terminal "C", seat sensor 5-volt supply circuit (Brown/White wire). Connect scan tool to Data Link Connector (DLC). Using scan tool, monitor HORIZONTAL POSITION SENSOR voltage. Turn ignition on. If voltage is more than 4.5 volts, replace seat track assembly. If voltage is 4.5 volts or less, leave driver power seat horizontal motor sensor connector disconnected, and go to next step.
5. Turn ignition off. Disconnect MHSMM connector C1. Measure resistance between ground and MHSMM connector C1 terminal No. 2, seat horizontal position signal circuit (Violet/Red wire). (Scheme 17) If resistance is less than 100 ohms, repair short to ground in Violet/Red wire. If resistance is 100 ohms or more, leave connectors disconnected, and go to next step.
6. Measure resistance of seat horizontal position signal circuit (Violet/Red wire) between driver power seat horizontal motor sensor connector terminal "B" and MHSMM connector C1 terminal No. 2. If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, repair open in Violet/Red wire.

Ignition Status Message Not Received

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with Body Control Module (BCM). If scan tool communicates with BCM, go to next step. If scan tool does not communicate with BCM, perform «BUS +/- SIGNALS OPEN FROM BODY CONTROL MODULE»(ref-37884-S06574507812001011000000) test under COMMUNICATIONS SYSTEM.
2. Using scan tool, clear IGNITION STATUS MESSAGE NOT RECEIVED DTC from memory heated seat/mirror module. Turn ignition off, then start engine. Wait one minute. Using scan tool, retrieve DTCs. If IGNITION STATUS MESSAGE NOT RECEIVED DTC resets, go to next step. If IGNITION STATUS MESSAGE NOT RECEIVED DTC does not reset, test is complete. Perform «MEMORY SYSTEMS VERIFICATION TEST»(ref-37884-S40557765872001011000000) under VERIFICATION TESTS.
3. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, replace MHSMM.

Loss Of Engine RPM

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, clear LOSS OF ENGINE RPM DTC from memory heated seat/mirror module. Turn ignition off, then start engine. Wait one minute. Using scan tool, retrieve DTCs. If LOSS OF ENGINE RPM DTC resets, go to next step. If LOSS OF ENGINE RPM DTC does not reset, test is complete. Perform «MEMORY SYSTEMS VERIFICATION TEST»(ref-37884-S40557765872001011000000) under VERIFICATION TESTS.
2. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, replace MHSMM.

Memory Position No. 1 Stuck

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect memory set switch connector. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, read MEM POS 1 SW status. If scan tool does not display OPEN, leave memory set switch connector disconnected, and go to next step. If scan tool displays OPEN, replace memory set switch.
2. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Measure resistance between ground and memory set switch connector terminal No. 6, memory position 1 switch sense circuit (Pink/Red wire). (Scheme 44) If resistance is less than 100 ohms, repair short to ground in Pink/Red wire. If resistance is 100 ohms or more, replace MHSMM.

Scheme 43

Memory Position No. 2 Stuck

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect memory set switch connector. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, read MEM POS 2 SW status. If scan tool does not display OPEN, leave memory set switch connector disconnected, and go to next step. If scan tool displays OPEN, replace memory set switch.
2. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Measure resistance between ground and memory set switch connector terminal No. 4, memory position 2 switch sense circuit switch sense circuit (Pink/White wire). (Scheme 44) If resistance is less than 100 ohms, repair short to ground in Pink/White wire. If resistance is 100 ohms or more, replace MHSMM.

Memory Set "S" Position Stuck

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect memory set switch connector. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, read MEM SET SW status. If scan tool does not display OPEN, leave memory set switch connector disconnected, and go to next step. If scan tool displays OPEN, replace memory set switch.
2. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Measure resistance between ground and memory set switch connector terminal No. 5, memory set switch sense circuit switch sense circuit (Pink/Black wire). (Scheme 44) If resistance is less than 100 ohms, repair short to ground in Pink/Black wire. If resistance is 100 ohms or more, replace MHSMM.

Passenger Mirror Horizontal Sensor Out Of Range High

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Turn ignition on. Measure voltage on MHSMM connector C1 terminal No. 19, passenger mirror horizontal position signal circuit (Dark Green/Red wire). (Scheme 17) If voltage is more than 4.5 volts, leave MHSMM connector C1 disconnected, and go to next step. If voltage is 4.5 volts or less, replace MHSMM.
2. Turn ignition off. Disconnect passenger mirror connector. Turn ignition on. Measure voltage on passenger mirror connector terminal No. 9, passenger mirror horizontal position signal circuit (Dark Green/Red wire). (Scheme 45) If any voltage exists, repair short to voltage in Dark Green/Red wire. If no voltage exists, replace passenger mirror.

Scheme 44

Passenger Mirror Horizontal Sensor Out Of Range Low

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Turn ignition on. Measure voltage on MHSMM connector C1 terminal No. 19, passenger mirror horizontal position signal circuit (Dark Green/Red wire). (Scheme 17) If voltage is 4.5-5.0 volts, replace MHSMM. If voltage is not 4.5-5.0 volts, leave MHSMM connector C1 disconnected, and go to next step.
2. Turn ignition off. Disconnect passenger mirror connector. Measure resistance of passenger mirror horizontal position signal circuit (Dark Green/Red wire) between passenger mirror connector terminal No. 9 and MHSMM connector C1 terminal No. 19. (Scheme 17)and (Scheme 45). If resistance is less than 5 ohms, leave connectors disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Dark Green/Red wire.
3. Measure resistance between ground and passenger mirror connector terminal No. 9, passenger mirror horizontal position signal circuit (Dark Green/Red wire). If resistance is less than 100 ohms, repair short to ground in Dark Green/Red wire. If resistance is 100 ohms or more, leave passenger mirror connector disconnected, and go to next step.
4. Ensure MHSMM connector is properly connected. Turn ignition on. Measure voltage on passenger mirror connector terminal No. 6, passenger mirror 5-volt supply circuit (Gray/White wire). If voltage is 4.5-5.0 volts, replace passenger mirror. If voltage is not 5.5-5.0 volts, leave passenger mirror connector disconnected, and go to next step.
5. Turn ignition off. Disconnect MHSMM connector C2. Measure resistance of passenger mirror 5-volt supply circuit (Gray/White wire) between passenger mirror connector terminal 6 and MHSMM connector C2 terminal No. 8. If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, repair open in Gray/White wire.

Passenger Mirror Vertical Sensor Out Of Range High

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Turn ignition on. Measure voltage on MHSMM connector C1 terminal No. 6, passenger mirror vertical position signal circuit (Yellow/Red wire). (Scheme 17) If voltage is more than 4.5 volts, leave MHSMM connector C1 disconnected, and go to next step. If voltage is 4.5 volts or less, replace MHSMM.
2. Turn ignition off. Disconnect passenger mirror connector. Turn ignition on. Measure voltage on passenger mirror connector terminal No. 7, passenger mirror vertical position signal circuit (Yellow/Red wire). (Scheme 17)and (Scheme 45). If any voltage exists, repair short to voltage in Yellow/Red wire. If no voltage exists, replace passenger mirror.

Passenger Mirror Vertical Sensor Out Of Range Low

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Turn ignition on. Measure voltage on MHSMM connector C1 terminal No. 6, passenger mirror vertical position signal circuit (Yellow/Red wire). (Scheme 17) If voltage is 4.5-5.0 volts, replace MHSMM. If voltage is not 4.5-5.0 volts, leave MHSMM connector C1 disconnected, and go to next step.
2. Turn ignition off. Disconnect passenger mirror connector. Measure resistance of passenger mirror vertical position signal circuit (Yellow/Red wire) between driver mirror connector terminal No. 7 and MHSMM connector C1 terminal No. 6. (Scheme 45) If resistance is less than 5 ohms, leave connectors disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Yellow/Red wire.
3. Measure resistance between ground and passenger mirror connector terminal No. 7, passenger mirror horizontal position signal circuit (Yellow/Red wire). If resistance is less than 100 ohms, repair short to ground in Yellow/Red wire. If resistance is 100 ohms or more, leave passenger mirror connector disconnected, and go to next step.
4. Ensure MHSMM connector is properly connected. Turn ignition on. Measure voltage on passenger mirror connector terminal No. 6, passenger mirror sensor 5-volt supply circuit (Gray/White wire). If voltage is 4.5-5.0 volts, replace passenger mirror. If voltage is not 5.5-5.0 volts, leave passenger mirror connector disconnected, and go to next step.
5. Turn ignition off. Disconnect MHSMM connector C2. Measure resistance of passenger mirror sensor 5-volt supply circuit (Gray/White wire) between passenger mirror connector terminal 6 and MHSMM connector C2 terminal No. 8. If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, repair open in Gray/White wire.

PRNDL DISP MSG Not Received

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with Transmission Control Module (TCM). If scan tool communicates with TCM, go to next step. If scan tool does not communicate with TCM, perform «NO RESPONSE FROM TRANSMISSION CONTROL MODULE OR BUS +/- SIGNALS OPEN»(ref-37884-S18222189142001011000000) test under COMMUNICATIONS SYSTEM.
2. Using scan tool, clear PRNDL DISP MSG NOT RECEIVED DTC from Memory Heated Seat/Mirror Module. Turn ignition off, then start engine. Wait one minute. Using scan tool, retrieve DTCs. If PRNDL DISP MSG NOT RECEIVED DTC resets, go to next step. If PRNDL DISP MSG NOT RECEIVED does not reset, test is complete. Perform «MEMORY SYSTEMS VERIFICATION TEST»(ref-37884-S40557765872001011000000) under VERIFICATION TESTS.
3. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, replace MHSMM.

Rear Riser Down Position Stuck

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect power seat switch connector. Turn ignition on. Measure voltage on power seat switch connector terminal No. 7, seat rear down switch sense circuit (Red/White wire). (Scheme 42) If any voltage exists, leave power seat switch connector disconnected, and go to next step. If no voltage exists, replace power seat switch.
2. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Turn ignition on. Measure voltage on MHSMM connector C1 terminal No. 9, rear down switch sense circuit (Red/White wire). (Scheme 17) If any voltage exists, repair short to voltage in Red/White wire. If no voltage exists, replace MHSMM.

Rear Riser Sensor Out Of Range High

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect driver power seat rear riser motor sensor connector. Measure resistance between ground and driver power seat rear riser motor sensor connector terminal "A", seat position sensor ground circuit (Brown/Red wire). (Scheme 43) If resistance is 5 ohms or more, leave driver power seat rear riser motor sensor connector disconnected, and go to next step. If resistance is less than 5 ohms, go to step 3.
2. Ensure ignition is off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C2. Measure resistance of seat position sensor ground circuit (Brown/Red wire) between driver power seat rear riser motor sensor connector terminal "A" and MHSMM connector C2 terminal No. 16. (Scheme 17) If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, repair open in Brown/Red wire.
3. Ensure driver power seat rear riser motor sensor connector is properly connected. Ensure all other power seat motor sensor connectors are connected. Ensure rear riser motor is operational. Connect scan tool to Data Link Connector (DLC). Using scan tool, monitor REAR RISER POSITION SENSOR voltage while operating rear riser motor to both limits. If voltage is more than 8 volts while motor is operating, replace seat track assembly. If voltage is not more than 8 volts while motor is operating, go to next step.
4. Turn ignition off. Disconnect driver power seat rear riser motor sensor connector. Disconnect MHSMM connector C1. Turn ignition on. Measure voltage between ground and driver power seat rear riser motor sensor connector terminal "A", seat position sensor ground circuit (Brown/Red wire). If no voltage exists, leave driver power seat rear riser motor sensor connector disconnected, and go to next step. If any voltage exists, repair short to voltage in Brown/Red wire.
5. Measure voltage between ground and driver power seat rear riser motor sensor connector terminal "C", seat sensor 5-volt supply circuit (Brown/White wire). If voltage is more than 5.5 volts, repair short to voltage in Brown/White wire. If voltage is 5.5 volts or less, leave rear riser motor sensor connector disconnected, and go to next step.
6. Turn ignition off. Ensure MHSMM connector C1 is properly connected. Turn ignition on. Using scan tool, read REAR RISER POSITION SENSOR voltage. If voltage more than 0.2 volt, replace MHSMM. If voltage is 0.2 volt or less, replace seat track assembly.

Rear Riser Sensor Out Of Range Low

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Ensure Memory Heated Seat/Mirror Module (MHSMM) is properly connected. Disconnect driver power seat front riser motor sensor connector. Turn ignition on. Measure voltage on driver power seat rear riser motor sensor connector terminal "C", seat sensor 5-volt supply circuit (Brown/White wire). (Scheme 43) If voltage is more than 4.5 volts, leave driver power seat rear riser motor sensor connector disconnected, and go to step 4. If voltage is 4.5 volts or less, leave driver power seat rear riser motor sensor connector disconnected, and go to next step.
2. Turn ignition off. Disconnect MHSMM connector C2. Measure resistance between ground and MHSMM connector C2 terminal No. 6, seat sensor 5-volt supply circuit (Brown/White wire). (Scheme 17) If resistance is less than 100 ohms, repair short to ground in Brown/White wire. If resistance is 100 ohms or more, leave connectors disconnected, and go to next step.
3. Measure resistance of seat sensor 5-volt supply circuit (Brown/White wire) between driver power seat rear riser motor sensor connector terminal "C" and MHSMM connector C2 terminal No. 6. If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, repair open in Brown/White wire.
4. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, monitor REAR RISER POSITION SENSOR voltage. Connect a fused jumper wire between driver power seat rear riser motor sensor connector terminal "C", seat sensor 5-volt supply circuit (Brown/White wire) and terminal "B", rear riser position signal circuit (Light Blue/Red wire). If voltage is more than 4.5 volts, replace seat track assembly. If voltage is 4.5 volts or less, leave driver power seat front riser motor sensor connector disconnected, and go to next step.
5. Turn ignition off. Remove jumper wire. Disconnect MHSMM connector C1. Measure resistance between ground and MHSMM connector C1 terminal No. 3, rear riser position signal circuit (Light Blue/Red wire). (Scheme 17) If resistance is less than 100 ohms, repair short to ground in Light Blue/Red. If resistance is 100 ohms or more, leave connectors disconnected, and go to next step.
6. Measure resistance between ground and MHSMM connector C1 terminal No. 3, rear riser position signal circuit (Light Blue/Red wire). If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, repair open in Light Blue/Red wire.

Rear Riser Up Position Stuck

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect power seat switch connector. Turn ignition on. Measure voltage on power seat switch connector terminal No. 8, seat rear up switch sense circuit (Yellow/White wire). (Scheme 42) If any voltage exists, leave power seat switch connector disconnected, and go to next step. If no voltage exists, replace power seat switch.
2. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Measure voltage on MHSMM connector C1 terminal No. 22, seat rear up switch sense circuit (Yellow/White wire). (Scheme 17) If any voltage exists, repair short to voltage in Yellow/White wire. If no voltage exists, replace MHSMM.

Recliner Down Position Stuck

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect power seat switch connector. Turn ignition on. Measure voltage on power seat switch connector terminal No. 2, recliner down switch sense circuit (Gray/White wire). (Scheme 42) If any voltage exists, leave power seat switch connector disconnected, and go to next step. If no voltage exists, replace power seat switch.
2. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Measure voltage on MHSMM connector C1 terminal No. 24, seat recliner down switch sense circuit (Gray/White wire). (Scheme 17) If any voltage exists, repair short to voltage in Gray/White wire. If no voltage exists, replace MHSMM.

Recliner Sensor Out Of Range High

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect driver seat recliner motor sensor connector. Measure resistance between ground and driver seat recliner motor sensor connector terminal "C", ground circuit (Brown/Red wire). (Scheme 42) If resistance is 5 ohms or more, leave driver seat recliner motor sensor disconnected, and go to next step. If resistance is less than 5 ohms, go to step 3.
2. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C2. Measure resistance of seat position sensor ground circuit (Brown/Red wire) between driver seat recliner motor sensor connector terminal "C" and MHSMM connector C2 terminal No. 16. (Scheme 17) If resistance is less than 5 ohms or less, replace MHSMM. If resistance is 5 ohms or more, repair open in Brown/Red wire.
3. Connect driver seat recliner motor sensor connector. Ensure all other seat motor sensor connectors are connected. Ensure recliner motor is operational. Connect scan tool to Data Link Connector (DLC). Using scan tool, monitor RECLINER POSITION SENSOR voltage while operating recliner motor to both limits. If voltage display is more than 7 volts while motor is operating, replace seat track assembly. If voltage display is never more than 7 volts while motor is operating, go to next step.
4. Disconnect driver seat recliner motor sensor connector. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Turn ignition on. Measure voltage between ground and driver seat recliner motor sensor connector terminal "C", seat sensor ground circuit (Brown/Red wire). If any voltage exists, repair short to voltage in Brown/Red wire. If no voltage exists, leave driver seat recliner motor sensor connector disconnected, and go to next step.
5. Measure voltage between ground and driver power seat recliner sensor motor connector terminal "A", seat sensor 5-volt supply circuit (Brown/White wire). If voltage is more than 5.5 volts, repair short to voltage in Brown/White wire. If voltage is 5.5 volts or less, leave driver seat recliner motor sensor connector disconnected, and go to next step.
6. Turn ignition off. Ensure MHSMM connector C1 is properly connected. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, read REAR RECLINER POSITION SENSOR voltage. If voltage is more than 0.2 volt, replace MHSMM. If voltage is 0.2 volt or less, replace seat track assembly.

Recliner Sensor Out Of Range Low

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Ensure Memory Heated Seat/Mirror Module (MHSMM) is properly connected. Disconnect driver seat recliner motor sensor connector. Turn ignition on. Measure voltage on terminal driver seat recliner motor sensor connector "A", seat sensor 5-volt supply circuit (Brown/White wire). (Scheme 42) If voltage is 4.5 volts or less, go to next step. If voltage is more than 4.5 volts, leave driver seat recliner motor sensor connector disconnected, and go to step 4.
2. Turn ignition off. Disconnect MHSMM connector C2. Measure resistance between ground and MHSMM connector C2 terminal No. 6, 5-volt supply circuit (Brown/White wire). (Scheme 17) If resistance is less than 100 ohms, repair short to ground in Brown/White wire. If resistance is 100 ohms or more, leave MHSMM connector disconnected, and go to next step.
3. Disconnect driver seat recliner motor sensor connector. Measure resistance in seat sensor 5-volt supply circuit (Brown/White wire) between driver seat recliner motor sensor connector terminal "A" and MHSMM connector C2 terminal No. 6. (Scheme 17)and (Scheme 42). If resistance is less than 100 ohms, repair short to ground in Brown/White wire. If resistance is 100 ohms or more, replace MHSMM.
4. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Measure resistance between ground and MHSMM connector C1 terminal No. 16, recliner position sensor circuit (Light Blue wire). (Scheme 17) If resistance is less than 100 ohms, repair short to ground in Light Blue wire. If resistance is 100 ohms or more, leave connectors disconnected, and go to next step.
5. Measure resistance of recliner position senor circuit (Light Blue wire) between driver seat recliner motor sensor connector terminal "B" and MHSMM connector C1 terminal No. 16. (Scheme 17)and (Scheme 42). If resistance is less than 5 ohms, leave driver seat recliner motor sensor connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Light Blue wire.
6. Ensure ignition is off. Ensure MHSMM connector is properly connected. Connect scan tool to Data Link Connector (DLC). Connect a fused jumper wire between driver seat recliner motor sensor connector terminal "A", seat sensor 5-volt supply circuit (Brown/White wire) and terminal "B", recliner position sensor circuit (Light Blue wire). Using scan tool, monitor RECLINER RISER POSITION SENSOR voltage. Turn ignition on. If voltage is more than 4.5 volts, replace seat track assembly. If voltage is 4.5 volts or less, replace MHSMM.

Recliner Up Position Stuck

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect power seat switch connector. Turn ignition on. Measure voltage on power seat switch connector terminal No. 4, recliner up switch sense circuit (Gray/Light Blue wire). (Scheme 42) If any voltage exists, leave power seat switch connector disconnected, and go to next step. If no voltage exists, replace power seat switch.
2. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Measure voltage between ground and MHSMM connector C1 terminal No. 11, seat recliner up switch sense circuit (Gray/Light Blue wire). (Scheme 17) If any voltage exists, repair short to voltage in Gray/Light Blue wire. If no voltage exists, replace MHSMM.

Driver Mirror Inoperative From Memory

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

Note. Ensure seat frame is connected to ground if seat frame is unbolted from vehicle.

1. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C2. Turn ignition on. Measure voltage on MHSMM connector C2 terminal No. 4, driver mirror left driver circuit (Black/White wire) while operating power mirror switch to driver mirror left position. (Scheme 17) If voltage is more than 10 volts when switch is pressed, leave MHSMM connector C2 disconnected, and go to next step. If voltage is 10 volts or less when switch is pressed, repair open in Black/White wire.
2. Measure voltage on MHSMM connector C2 terminal No. 3, driver mirror common driver circuit (Yellow/Pink wire) while operating power mirror switch to driver mirror down position. If voltage is more than 10 volts when switch is pressed, go to next step. If voltage is 10 volts or less when switch is pressed, repair open in Yellow/Pink wire.
3. Turn ignition off. Disconnect MHSMM connector C2. Turn ignition on. Measure voltage on MHSMM connector C2 terminal No. 5, driver mirror up driver circuit (Yellow wire) while operating power mirror switch to driver mirror up position. If voltage more than 10 volts, go to next step. If voltage is 10 volts or less when switch is pressed, repair open in Yellow wire.
4. Turn ignition off. Ensure MHSMM connector is properly connected. Disconnect driver power mirror connector. Measure resistance of driver power mirror connector terminal No. 10, driver mirror sensor ground circuit (White/Red wire). If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, leave driver power mirror connector disconnected, and go to next step.
5. Ensure ignition is off. Disconnect MHSMM connector C1. Measure resistance of driver mirror sensor ground circuit (White/Red wire) between driver power mirror connector terminal No. 10 and MHSMM connector C1 terminal No. 1. If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, repair open in White/Red wire.

Memory Switch Inoperative

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

Note. Ensure seat frame is connected to ground if seat frame is unbolted from vehicle.

1. Turn ignition off. Disconnect memory set switch connector. Measure resistance between ground and memory set switch connector terminal No. 3, ground circuit (Black wire). (Scheme 44) If resistance is less than 5 ohms, leave memory set switch connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Black wire.
2. Turn ignition on. Measure voltage on memory set switch connector terminal No. 6, memory position 1 switch sense circuit (Pink/Red wire). If voltage is more than 0.5 volt, leave memory set switch connector disconnected, and go to next step. If voltage is 0.5 volt or less, go to step 7.
3. Measure voltage on memory set switch connector terminal No. 4, memory position 2 switch sense circuit (Pink/White wire). If voltage is more than 0.5, leave memory set switch connector disconnected, and go to next step. If all voltage is 0.5 volt or more, leave memory set switch connector disconnected, and go to step 6.
4. Measure voltage on memory set switch connector terminal No. 5, memory set switch sense circuit (Pink/Black wire). If voltage is more than 0.5 volt, replace memory set switch. If voltage is 0.5 volt or less, leave memory set switch connector disconnected, and go to next step.
5. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Measure resistance of memory set switch sense circuit (Pink/Black wire) between memory set switch connector terminal No. 5 and MHSMM connector C1 terminal 13. If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, repair open in Pink/Black wire.
6. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Measure resistance of memory position 2 switch sense circuit (Pink/White wire) between memory set switch connector terminal No. 4 and MHSMM connector C1 terminal 25. If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, repair open in Pink/White wire.
7. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Measure resistance of memory position 1 switch sense circuit (Pink/Red wire) between memory set switch connector terminal No. 6 and MHSMM connector C1 terminal 12. (Scheme 17)and (Scheme 44). If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, repair open in Pink/Red wire.

Passenger Mirror Inoperative From Memory

Note. After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST under VERIFICATION TESTS.

Note. Ensure seat frame is connected to ground if seat is unbolted from vehicle.

1. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C2. Turn ignition on. Measure voltage on MHSMM connector C2 terminal No. 12, passenger mirror left driver circuit (Dark Blue wire) while operating power mirror switch to passenger mirror left position. (Scheme 17) If voltage is more than 10 volts when switch is pressed, leave MHSMM connector C2 disconnected, and go to next step. If voltage is 10 volts or less when switch is pressed, repair open in Dark Blue wire.
2. Measure voltage on MHSMM connector C2 terminal No. 11, passenger mirror common driver circuit (White wire) while operating power mirror switch to passenger mirror down position. If voltage is more than 10 volts when switch is pressed, go to next step. If voltage is 10 volts or less when switch is pressed, repair open in White wire.
3. Turn ignition off. Disconnect MHSMM connector C2. Turn ignition on. Measure voltage on MHSMM connector C2 terminal No. 13, passenger mirror up driver circuit (Yellow/Black wire) while operating power mirror switch to passenger mirror up position. If voltage more than 10 volts, go to next step. If voltage is 10 volts or less when switch is pressed, repair open in Yellow/Black wire.
4. Turn ignition off. Ensure MHSMM connector is properly connected. Disconnect passenger power mirror connector. Measure resistance of passenger power mirror connector terminal No. 10, passenger mirror sensor ground circuit (White/Black wire). (Scheme 45) If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, leave passenger power mirror connector disconnected, and go to next step.
5. Turn ignition off. Disconnect MHSMM connector C1. Measure resistance of passenger mirror sensor ground circuit (White/Black wire) between passenger power mirror connector terminal No. 10 and MHSMM connector C1 terminal No. 14. (Scheme 17)and (Scheme 45). If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, repair open in White/Black wire.

Note. For Overhead Travel Information System (OTIS) wiring diagrams, see OVERHEAD CONSOLES article.

Ambient Temperature Sensor Failure

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

For ambient/battery temperature sensor testing procedures, perform appropriate ambient/battery temperature sensor test in appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.

BUS Messages Missing

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Using scan tool, attempt to communicate with Body Control Module (BCM). If scan tool communicates with BCM, go to next step. If scan tool does not communicate with BCM, perform «BUS +/- SIGNALS OPEN FROM BODY CONTROL MODULE»(ref-37884-S06574507812001011000000) test under COMMUNICATIONS SYSTEM.
2. Turn ignition on. Using scan tool, select BODY, BODY COMPUTER, then SYSTEM TEST. If scan tool displays PCM ACTIVE ON THE BUS, go to next step. If scan tool does not display PCM ACTIVE ON THE BUS, perform «NO RESPONSE FROM POWERTRAIN CONTROL MODULE (PCI BUS)»(ref-37884-S31456202182001011000000) test under COMMUNICATIONS SYSTEM.
3. Using scan tool, attempt to communicate with Mechanical Instrument Cluster (MIC). If scan tool communicates with MIC, replace overhead console. If scan tool does not communicate with MIC, perform «BUS +/- SIGNALS OPEN FROM INSTRUMENT CLUSTER»(ref-37884-S28746225992001011600000) test under COMMUNICATIONS SYSTEM.

Distance To Empty Inoperative Or Wrong

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, retrieve Powertrain Control Module (PCM) DTCs. If no PCM DTCs exist, go to next step. If any PCM DTCs exist, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
2. Check fuel gauge and odometer for proper operation. If problem exists, repair as necessary. Perform appropriate test(s) under «INSTRUMENT CLUSTER SYSTEMS»(ref-37884-S38966178692001011000000) . If problem does not exist, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Elapsed Time Inoperative Or Wrong

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Clear current elapsed time from Overhead Travel Information System (OTIS). Start engine and monitor elapsed time on OTIS. If elapsed time is still malfunctioning, replace Body Control Module (BCM). If elapsed time is operating properly, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See WIRING DIAGRAMS . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Incorrect Ambient Temperature Sensor Reading

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

For ambient/battery temperature sensor testing procedures, perform appropriate ambient/battery temperature sensor test in appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.

Low Washer Indicator On At All Times

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Check washer fluid level. Add washer fluid as necessary. If low washer indicator remains on, go to next step.
2. Ensure ignition is off. Disconnect 2-pin washer fluid level switch connector. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, read WASHER FLUID LEVEL SW voltage. If voltage is more than 5 volts, replace fluid level switch. If voltage is 5 volts or less, leave washer fluid level switch connector disconnected, and go to next step.
3. Turn ignition off. Disconnect instrument cluster connector C2. Measure resistance between ground and instrument cluster connector C2 terminal No. 4, washer fluid level switch sense circuit (Black/Tan wire). (Scheme 16) If resistance is less than 100 ohms, repair short to ground in Black/Tan wire. If resistance is 100 ohms or more, replace instrument cluster.

Mileage/Distance Functions

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition on. Check other overhead console functions. If other overhead console functions are operating properly, go to next step. If other overhead console functions are not operating properly, replace overhead console.
2. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, retrieve Powertrain Control Module (PCM) DTCs. If any PCM DTCs exist, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If no PCM DTCs exist, go to next step.
3. Ensure injector pulse, pinion factor, fuel fill procedure, brake adjustment and tire size are correct. Repair as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

No BCM Messages Received

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Using scan tool, clear DTCs. Turn ignition on. Using scan tool, retrieve DTCs. If NO BCM MESSAGES RECEIVED DTC resets, go to next step. If NO BCM MESSAGES RECEIVED DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
2. Using scan tool, select BODY COMPUTER. If scan tool displays BUS +/- SIGNALS OPEN FROM BODY CONTROL MODULE, perform «BUS +/- SIGNALS OPEN FROM BODY CONTROL MODULE»(ref-37884-S06574507812001011000000) test under COMMUNICATIONS SYSTEM. If scan tool does not display BUS +/- SIGNALS OPEN FROM BODY CONTROL MODULE, replace overhead console.

No PCM Messages Received

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Using scan tool, clear DTCs. Turn ignition on. Using scan tool, retrieve DTCs. If NO PCM MESSAGES RECEIVED DTC resets, go to next step. If NO PCM MESSAGES RECEIVED DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
2. Using scan tool, select BODY COMPUTER, SYSTEM TEST, then PCM MONITOR. If scan tool displays PCM ACTIVE ON THE BUS, replace overhead console. If scan tool does not display PCM ACTIVE ON THE BUS, perform «NO RESPONSE FROM POWERTRAIN CONTROL MODULE (PCI BUS)»(ref-37884-S31456202182001011000000) test under COMMUNICATIONS SYSTEM.

OTIS Screen Displays FAIL

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, perform AUTO SELF-TEST while observing Overhead Travel Information System (OTIS) display. If OTIS displays FAIL, replace OTIS module. If OTIS does not display FAIL, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See WIRING DIAGRAMS . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

OTIS Segments Fail To Light Up

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, perform AUTO SELF-TEST while observing Overhead Travel Information System (OTIS) display. If any OTIS segments do not illuminate, replace OTIS module. If all OTIS segments illuminate, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See WIRING DIAGRAMS . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

POWER DOOR LOCKS/REMOTE KEYLESS ENTRY SYSTEM

Note. For power door locks and remote and remote keyless entry systems wiring diagrams, see WIRING DIAGRAMS in POWER DOOR LOCKS & TRUNK RELEASE and REMOTE KEYLESS ENTRY SYSTEMS articles.

Deck Lid Release Solenoid Output Failure

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, clear Body Control Module (BCM) Diagnostic Trouble Codes (DTC). Press deck lid release switch several times. Using scan tool, retrieve BCM DTCs. If DECK LID RELEASE SOLENOID OUTPUT FAILURE DTC resets, go to next step. If DECK LID RELEASE SOLENOID OUTPUT FAILURE DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
2. Turn ignition off. Disconnect deck lid release solenoid/ajar switch connector. Turn ignition on. Connect a 12-volt test light between ground and deck lid release solenoid/ajar switch connector terminal No. 3, deck release solenoid control circuit (Black/White wire). (Scheme 46) If test light illuminates, leave deck lid release solenoid/ajar switch connector disconnected, and go to next step. If test light does not illuminate, leave deck lid release solenoid/ajar switch connector disconnected, and go to step 4.
3. Turn ignition off. Remove BCM from back of junction block. Turn ignition on. Measure voltage on deck lid release solenoid/ajar switch connector terminal No. 3, deck lid release solenoid control circuit (Black/White wire). If any voltage is present, repair short to voltage in Black/White wire. If no voltage is present, replace BCM.
4. Turn ignition off. Measure resistance between ground and deck lid release solenoid/ajar switch connector terminal No. 1, ground circuit (Black wire). If resistance is less than 5 ohms, leave deck lid release solenoid/ajar switch connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Black wire.
5. Connect a 12-volt test light between deck lid release solenoid/ajar switch connector terminal No. 1, ground circuit (Black wire) and terminal No. 3, deck release solenoid control circuit (Black/White wire). Observe test light while pressing deck lid release switch. If test light illuminates when switch is pressed, replace deck lid release solenoid/ajar switch. If test light does not illuminate when switch is pressed, leave deck lid release solenoid/ajar switch connector disconnected, and go to next step.
6. Ensure ignition is off. Remove BCM from back of junction block. Measure resistance between ground and deck lid release solenoid/ajar switch connector terminal No. 3, deck release solenoid control circuit (Black/White wire). If resistance is less than 100, repair short to ground in Black/White wire. If resistance is 100 ohms or more, leave deck lid release solenoid/ajar switch connector disconnected, BCM removed, and go to next step.
7. Measure resistance of deck release solenoid control circuit (Black/White wire) between deck lid release solenoid/ajar switch connector terminal No. 3 and terminal No. 8 at BCM connector on back of junction block. (Scheme 9)and (Scheme 46). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Black/White wire.

Scheme 45

Deck Lid Release Switch Failure

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Wait 30 seconds. Using scan tool, clear Body Control Module (BCM) Diagnostic Trouble Codes (DTC). Press deck lid release switch several times. Using scan tool, retrieve BCM DTCs. If DECK LID RELEASE SWITCH FAILURE DTC resets, go to next step. If DECK LID RELEASE SWITCH FAILURE DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
2. Turn ignition off. Disconnect 2-pin deck lid release switch connector. Turn ignition on. Using scan tool, clear DTCs. Cycle ignition switch off, then on. Wait 30 seconds. Using scan tool, retrieve DTCs. If DECK LID RELEASE SWITCH FAILURE DTC resets, leave deck lid release switch connector disconnected, and go to next step. If DECK LID RELEASE SWITCH FAILURE DTC does not reset, replace deck lid release switch.
3. Turn ignition off. Disconnect Body Control Module (BCM) connector C1. Turn ignition on. Measure voltage on deck lid release switch connector terminal No. 1, deck lid release switch output circuit (Black/White wire). If any voltage exists, repair short to voltage in Black/White wire. If no voltage exists, replace BCM.

Driver Door Central Lock (Arm)/Unlock (Disarm) Switch Failure

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, clear Body Control Module (BCM) Diagnostic Trouble Codes (DTC). Using key in driver door, lock and unlock vehicle several times. Using scan tool, retrieve BCM DTCs. If DRIVER DOOR CENTRAL LOCK (ARM)/UNLOCK (DISARM) SWITCH FAILURE DTC resets, go to next step. If DRIVER DOOR CENTRAL LOCK (ARM)/UNLOCK (DISARM) SWITCH FAILURE DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
2. Turn ignition off. Using key in driver door, lock and unlock vehicle several times. If key is not binding in any position, go to next step. If key is binding in any position, repair or replace driver cylinder lock as necessary.
3. Disconnect driver cylinder lock switch connector. Turn ignition on. Using scan tool, read DR DOOR DISARM SW voltage. If any voltage is displayed, leave driver cylinder lock switch connector disconnected, and go to next step. If no voltage is displayed, replace driver cylinder lock switch.
4. Turn ignition off. Disconnect BCM connector C4. Turn ignition on. Measure voltage on BCM connector C4 terminal No. 5, driver cylinder lock switch MUX circuit (White/Dark Green wire) at. (Scheme 8) If any voltage exists, repair short to voltage in White/Dark Green wire. If no voltage exists, replace BCM.

Passenger Door Central Lock (Arm)/Unlock (Disarm) Switch Failure

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, clear Body Control Module (BCM) Diagnostic Trouble Codes (DTC). Using key in passenger door, lock and unlock vehicle several times. Using scan tool, retrieve BCM DTCs. If PASSENGER DOOR CENTRAL LOCK (ARM)/UNLOCK (DISARM) SWITCH FAILURE DTC resets, go to next step. If PASSENGER DOOR CENTRAL LOCK (ARM)/UNLOCK (DISARM) SWITCH FAILURE DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
2. Turn ignition off. Using key in passenger door, lock and unlock vehicle several times. If key is not binding in any position, go to next step. If key is binding in any position, repair or replace passenger cylinder lock as necessary.
3. Disconnect passenger cylinder lock switch connector. Turn ignition on. Using scan tool, read PASS DOOR DISARM SW voltage. If any voltage is displayed, leave passenger cylinder lock switch connector disconnected, and go to next step. If no voltage is displayed, replace passenger cylinder lock switch.
4. Turn ignition off. Disconnect BCM connector C4. Turn ignition on. Measure voltage on BCM connector C4 terminal No. 3, passenger cylinder lock switch MUX circuit (Dark Green/Orange wire) at. (Scheme 8) If any voltage exists, repair short to voltage in Dark Green/Orange wire. If no voltage exists, replace BCM.

RKE Fob Battery Low

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. To determine which transmitter set RKE FOB BATTERY LOW DTC, press any button on each transmitter. If no chime is heard in Body Control Module (BCM) when button is pressed, transmitter is okay. If chime is heard in BCM when button is pressed, check problem transmitter. Go to next step.
2. Test voltage of each battery in problem transmitter. If voltage is more than 3 volts in both batteries, replace transmitter. If voltage is 3 volts or less in either battery, replace battery.

RKE Program Mode Entered Without Program Request

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Replace Remote Keyless Entry (RKE) module. Using scan tool, program all RKE transmitters to be used with vehicle. See «REMOTE KEYLESS ENTRY TRANSMITTER»(ref-37884-S32158010642001011000000) under PROGRAMMING. Go to next step.
2. Using scan tool, clear Body Control Module (BCM) Diagnostic Trouble Codes (DTC). Using RKE transmitters, lock and unlock vehicle several times. Using scan tool, retrieve BCM DTCs. If RKE PROGRAM MODE ENTERED WITHOUT PROGRAM REQUEST DTC resets, replace BCM. If RKE PROGRAM MODE ENTERED WITHOUT PROGRAM REQUEST DTC does not reset, test is complete.

RKE Unable To Enter Program Mode

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Replace Remote Keyless Entry (RKE) module. Connect scan tool to Data Link Connector (DLC). Using scan tool, clear Body Control Module (BCM) DTCs. Go to next step.
2. Using scan tool, attempt to program all RKE transmitters to be used with vehicle. See «REMOTE KEYLESS ENTRY TRANSMITTER»(ref-37884-S32158010642001011000000) under PROGRAMMING. Using scan tool, retrieve BCM DTCs. If RKE UNABLE TO ENTER PROGRAM MODE DTC resets, replace BCM. If RKE UNABLE TO ENTER PROGRAM MODE DTC does not reset, test is complete.

All Doors Failing To Lock & Unlock From Any Switch

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition on. Lower driver window. Turn ignition off. Remove ignition key from ignition switch. Connect scan tool to Data Link Connector (DLC). Using scan tool, actuate door lock relay. If all doors lock, go to next step. If all doors do not lock, go to step 13.
2. Using scan tool, read DOOR LOCK SW voltage. If voltage is more than 0.2 volt, go to next step. If voltage is 0.2 volt or less, go to step 7.
3. Disconnect passenger power door lock switch connector. Using scan tool, read DOOR LOCK SW voltage. If voltage is more than 0.2 volt, leave passenger power door lock switch connector disconnected, and go to next step. If voltage is 0.2 volt or less, replace passenger power door lock switch.
4. Disconnect Body Control Module (BCM) connector C4. Turn ignition on. Measure voltage on BCM connector C4 terminal No. 12, passenger door switch MUX circuit (White/Light Green wire). (Scheme 8) If voltage is more than 0.2 volt, repair short to voltage in White/Light Green wire. If voltage is 0.2 volt or less, go to next step.
5. Turn ignition off. Connect BCM connector C4. Disconnect driver power door lock switch connector. Turn ignition on. Using scan tool, read DOOR LOCK SW voltage. If voltage is more than 0.2 volt, leave driver power door lock switch connector disconnected, and go to next step. If voltage is 0.2 volt or less, replace driver power door lock switch.
6. Turn ignition off. Disconnect Body Control Module (BCM) connector C4. Turn ignition on. Measure voltage on BCM connector C4 terminal No. 5, driver door switch MUX circuit (White/Dark Green wire). If voltage is more than 0.2 volt, repair short to voltage in White/Light Green wire. If voltage is 0.2 volt or less, replace BCM.
7. Using scan tool, monitor DOOR LOCK SW voltage while pressing and holding driver power door lock switch in lock position. If voltage is more than 1.7 volts, replace Body Control Module (BCM). If voltage is 1.7 volts or less, go to next step.
8. Ensure ignition is off. Disconnect driver power door lock switch connector. Measure voltage on driver power door lock switch connector terminal No. 1, fused B+ circuit (Pink wire). (Scheme 47) If voltage is more than 10 volts, leave driver power door lock switch connector disconnected, and go to next step. If voltage is 10 volts or less, repair open in Pink wire.
9. Disconnect Body Control Module (BCM) connector C4. Measure resistance between ground and BCM connector C4 terminal No. 12, passenger door switch MUX circuit (White/Light Green wire). (Scheme 8) If resistance is less than 100 ohms, repair short to ground in White/Light Green wire. If resistance is 100 ohms or more, leave connectors disconnected, and go to next step.
10. Measure resistance between ground and BCM connector C4 terminal No. 5, driver door switch MUX circuit (White/Dark Green wire). If resistance is less than 100 ohms, repair short to ground in White/Dark Green wire. If resistance is 100 ohms or more, leave BCM connector C4 disconnected, and go to next step.
11. Ensure passenger power door lock switch connector is properly connected. Measure resistance between ground and BCM connector C4 terminal No. 12, passenger door switch MUX circuit (White/Light Green wire). If resistance is less than 100 ohms, replace passenger power door lock switch. If resistance is 100 ohms or more, lead BCM connector C4 disconnected, and go to next step.
12. Ensure driver power door lock switch connector is properly connected. Measure resistance between ground and BCM Connector C4 terminal No. 5, driver door switch MUX circuit (White/Dark Green wire). If resistance is less than 100 ohms, replace driver power door lock switch. If resistance is 100 ohms or more, replace BCM.
13. Remove door lock relay from junction block. (Scheme 38) Connect a 12-volt test light between ground and door lock relay connector terminal No. 83, fused B+ circuit. If test light illuminates brightly, leave door lock relay removed, and go to next step. If test light does not illuminate brightly, repair open in fused B+ circuit (Light Blue/Red wire) between Power Distribution Center (PDC) and junction block.
14. Connect 12-volt test light between door lock relay connector terminals No. 83, fused B+ circuit and 85, door lock relay control circuit. Using scan tool, actuate door lock relay. If test light flashes, leave door lock relay removed, and go to next step. If test light does not flash, go to step 22.
15. Remove Circuit Breaker No. 2 (CB 2) from junction block. (Scheme 38) Measure resistance of CB 2. If resistance is less than one ohm, leave door lock relay removed, and go to next step. If resistance is one ohm or more, replace CB 2 (20-amp).
16. Ensure CB 2 is properly installed. Remove door lock relay from junction block. Connect a 12-volt test light between ground and door lock relay connector terminal No. 82, fused B+ circuit. If test light illuminates brightly, leave door lock relay removed, and go to next step. If test light does not illuminate brightly, repair open in fused B+ circuit (Light Blue/Red wire) between Power Distribution Center (PDC) and junction block.
17. Connect 12-volt test light between battery voltage and door lock relay connector terminal No. 84 (ground circuit). If test light illuminates brightly, leave door lock relay removed, and go to next step. If test light does not illuminate brightly, repair open in ground circuit as necessary. See GROUND DISTRIBUTION article in WIRING DIAGRAMS.
18. Measure resistance between door lock relay (component side) terminals No. 85 and 86 at. (Scheme 48) If resistance is 50-90 ohms, leave door lock relay removed, and go to next step. If resistance is not 50-90 ohms, replace door lock relay.
19. Measure resistance between door lock relay (component side) terminal No. 86 and terminals No. 30, 87 and 87a. If any resistance is less than 5 ohms, replace door lock relay. If all resistances are 5 ohms or more, leave door lock relay removed, and go to next step.
20. Remove door unlock relay. Measure resistance between door lock relay (component side) terminals No. 30 and 87a, and between door unlock relay (component side) terminals No. 30 and 87a. If either resistance is less than one ohm, replace appropriate relay(s). If both resistances are one ohm or more, leave relays removed, and go to next step.
21. Measure resistance between door lock relay connector terminal No. 81, output circuit and door unlock relay connector terminal No. 76, output circuit. If resistance is less than 5 ohms, repair open in door lock output circuit and/or open door unlock relay output circuit as necessary. See POWER DISTRIBUTION article in WIRING DIAGRAMS.
22. Ensure ignition is off. Remove Body Control Module (BCM) from back of junction block. Measure resistance of door lock relay control circuit between door lock relay connector and terminal No. 15 at BCM connector on back of junction block. (Scheme 9)and (Scheme 38). If resistance is less than one ohm, replace BCM. If resistance is one ohm or more, replace junction block.

Scheme 46

Scheme 47

All Doors Failing To Lock & Unlock From One Switch

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Operate door locks from power door lock switches and door cylinder lock switches (if equipped). If problem is with door cylinder lock switch, go to next step. If problem is with power door lock switch, go to step 8.
2. Turn ignition off. Disconnect inoperative door cylinder lock switch connector. Measure voltage between ground and 2-pin door cylinder lock switch connector terminal No. 2, fused B+ circuit (Pink wire). If voltage is more than 10 volts, leave door lock cylinder switch connector disconnected, and go to next step. If voltage is 10 volts or less, repair open in Pink wire.
3. Ensure ignition is off. Disconnect Body Control Module (BCM) connector C4. Measure resistance between ground and door cylinder lock switch connector terminal No. 1, cylinder lock switch MUX circuit (Light Green/Orange wire on driver side; Dark Green/Orange wire on passenger side). If resistance is 100 ohms or less, repair short to ground in Light Green/Orange wire or Dark Green/Orange wire. If resistance is 100 ohms or more, leave connectors disconnected, and go to next step.
4. If driver door cylinder lock switch is malfunctioning, leave connectors disconnected, and go to next step. If passenger door cylinder lock switch is malfunctioning, leave connectors disconnected, and go to step 6.
5. Measure resistance of driver door cylinder lock switch MUX circuit (Light Green/Orange wire) between driver door lock cylinder switch connector terminal No. 1 and BCM connector C4 terminal No. 13. (Scheme 8) If resistance is less than 5 ohms, leave door cylinder lock switch connector disconnected, and go to step 7. If resistance is 5 ohms or more, repair open in Light Green/Orange wire.
6. Measure resistance of passenger door cylinder lock switch MUX circuit (Dark Green/Orange wire) between passenger door lock cylinder switch connector terminal No. 1 and BCM connector C4 terminal No. 3. (Scheme 8) If resistance is less than 5 ohms, leave door cylinder lock switch connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Dark Green/Orange wire.
7. Connect BCM connector C4. Connect scan tool to Data Link Connector (DLC). Connect a fused jumper wire between terminal No. 1, cylinder lock switch MUX circuit (Light Green/Orange wire on driver side; Dark Green/Orange wire on passenger side) and terminal No. 2, fused B+ circuit (Pink wire) at appropriate door cylinder lock switch connector. Using scan tool, read DOOR DISARM SWITCH voltage. If voltage is more than 9 volts, replace appropriate door cylinder lock switch. If voltage is 9 volts or less, replace BCM.
8. Disconnect malfunctioning power door lock switch connector. Measure voltage on appropriate door lock switch connector terminal No. 1, fused B+ circuit (Pink wire). (Scheme 47) If voltage is more than 10 volts, leave power door lock switch connector disconnected, and go to next step. If voltage is 10 volts or less, repair open in Pink wire.
9. If driver power door lock switch is malfunctioning, leave power door lock switch connector disconnected, and go to next step. If passenger power door lock switch is malfunctioning, leave power door lock switch connector disconnected, and go to step 11.
10. Ensure ignition is off. Disconnect Body Control Module (BCM) connector C4. Measure resistance of door switch MUX circuit (White/Light Green wire) between driver power door lock switch connector terminal No. 4 and BCM connector C4 terminal No. 5. (Scheme 8)and (Scheme 47). If resistance is less than 5 ohms, leave power door lock switch connector disconnected, and go to step 12. If resistance is 5 ohms or more, repair open in White/Light Green wire.
11. Ensure ignition is off. Disconnect Body Control Module (BCM) connector C4. Measure resistance of door switch MUX circuit (White/Dark Green wire) between passenger power door lock switch connector terminal No. 4 and BCM connector C4 terminal No. 12. (Scheme 8)and (Scheme 47). If resistance is less than 5 ohms, leave power door lock switch connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in White/Dark Green wire.
12. Connect BCM connector C4. Connect scan tool to Data Link Connector (DLC). Connect a fused jumper wire between terminal No. 1, fused B+ circuit (Pink wire) and terminal No.4, door switch MUX circuit (White/Dark Green wire on driver side; White/Light Green wire on passenger side) at appropriate power door lock switch connector. Using scan tool, read DOOR LOCK SWITCH voltage. If voltage is more than 9 volts, replace appropriate power door lock switch. If voltage is 9 volts or less, replace BCM.

All Doors Failing To Lock From Any Switch

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Remove door lock relay from junction block. (Scheme 38) Connect a 12-volt test light between ground and door lock relay connector terminals No. 82 and 83. If test light illuminates brightly at both terminals, leave door lock relay removed, and go to next step. If test light does not illuminate brightly at both terminals, replace junction block.
2. Connect scan tool to Data Link Connector (DLC). Connect test light between door lock relay connector terminals No. 83 and 85. Using scan tool, actuate door lock relay. If test light flashes, leave door lock relay removed, and go to next step. If test light does not flash, leave door lock relay removed, and go to step 8.
3. Measure resistance between door lock relay (component side) terminals No. 85 and 86. (Scheme 48) If resistance is 50-90 ohms, leave door lock relay removed, and go to next step. If resistance is not 50-90, replace door lock relay.
4. Measure resistance between door lock relay (component side) terminal No. 86 and terminals No. 30, 87 and 87a. If any resistance is less than 5 ohms, replace door lock relay. If all resistances are 5 ohms or more, leave door lock relay removed, and go to next step.
5. Remove door unlock relay and driver door unlock relay from junction block. (Scheme 38) Measure resistance between ground and door lock relay connector terminal No. 81. If resistance is less than 100 ohms, replace junction block. If resistance is 100 ohms or more, leave door unlock relay removed, and go to next step.
6. Measure resistance between door unlock relay (component side) terminals No. 30 and 87a. If resistance is more than 5 ohms, replace door unlock relay. If resistance is 5 ohms or less, leave door unlock relay removed, and go to next step.
7. Measure resistance between ground and door unlock relay connector terminal No. 79. If resistance is 5 ohms or more, replace junction block. If resistance is less than 5 ohms, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
8. Ensure ignition is off. Remove Body Control Module (BCM) from back of junction block. Measure resistance between door lock relay connector terminal No. 85 and terminal No. 15 at BCM connector on back of junction block. (Scheme 9)and (Scheme 38). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, replace junction block.

All Doors Failing To Lock From One Switch

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Lower driver window. Operate door locks from malfunctioning power door lock switch and door cylinder lock switch (if equipped) to lock position. If door does not lock, replace appropriate switch. If door locks, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See WIRING DIAGRAMS . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

All Doors Failing To Unlock From Any Switch

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Remove door unlock relay from junction block. Connect a 12-volt test light between ground and door unlock relay connector terminals No. 77 and 78. (Scheme 38) If test light illuminates brightly at both terminals, leave door unlock relay removed, and go to next step. If test light does not illuminate brightly at both terminals, replace junction block.
2. Connect scan tool to Data Link Connector (DLC). Connect test light between door unlock relay connector terminals No. 78 and 80. Using scan tool, actuate door unlock relay. If test light flashes, leave door unlock relay removed, and go to next step. If test light does not flash, leave door unlock relay removed, and go to step 8.
3. Measure resistance between door unlock relay (component side) terminals No. 85 and 86. (Scheme 48) If resistance is 50-90 ohms, leave door unlock relay removed, and go to next step. If resistance is not 50-90, replace door unlock relay.
4. Measure resistance between door unlock relay (component side) terminal No. 86 and terminals No. 30, 87 and 87a. If any resistance is less than 5 ohms, replace door unlock relay. If all resistances are 5 ohms or more, leave door unlock relay removed, and go to next step.
5. Remove door lock relay and driver door unlock relay from junction block. Measure resistance between ground and door unlock relay connector terminal No. 76. If resistance is less than 100 ohms, replace junction block. If resistance is 100 ohms or more, leave door lock relay removed, and go to next step.
6. Measure resistance between door lock relay (component side) terminals No. 30 and 87a. If resistance is more than 5 ohms, replace door lock relay. If resistance is 5 ohms or less, leave door lock relay removed, and go to next step.
7. Measure resistance between ground and door lock relay connector terminal No. 84. If resistance is 5 ohms or more, replace junction block. If resistance is less than 5 ohms, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
8. Ensure ignition is off. Remove Body Control Module (BCM) from back of junction block. Measure resistance between door unlock relay connector terminal No. 80 and terminal No. 18 at BCM connector on back of junction block. (Scheme 9)and (Scheme 38). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, replace junction block.

All Doors Failing To Unlock From One Switch

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Lower driver window. Operate door locks from malfunctioning power door lock switch and door cylinder lock switch (if equipped) to unlock position. If door does not unlock, replace appropriate switch. If door unlocks, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See WIRING DIAGRAMS . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Automatic (Rolling) Door Locks Inoperative

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Close all doors. Using scan tool, read DOOR AJAR status. If scan tool displays CLOSED for any door, perform appropriate DOOR AJAR CKT STG test under «DOOR AJAR SYSTEM»(ref-37884-S03975298622001012500000) . If scan tool displays OPEN for any door, go to next step.
2. Using scan tool, retrieve Powertrain Control Module (PCM) DTCs. If no PCM DTCs exist, go to next step. If any PCM DTCs exist, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
3. Using scan tool, read AUTO DOOR LOCK status. If scan tool displays ENABLED, replace BCM. If scan tool does not display ENABLED, enable auto door locks using scan tool.

Deck Lid Release Inoperative

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect deck lid release solenoid/ajar switch connector. Measure resistance between ground and deck lid release solenoid/ajar switch connector terminal No. 1, ground circuit (Black wire). (Scheme 46) If resistance is less than 5 ohms, leave deck lid release solenoid/ajar switch connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Black wire.
2. Connect a 12-volt test light between deck lid release solenoid/ajar switch connector terminal No. 1, ground circuit (Black wire) and terminal No. 3, deck lid release control circuit (Black/White wire). Press deck lid release switch. If test light illuminates when switch is pressed, replace deck lid release solenoid/ajar switch. If test light does not illuminate when switch is pressed, go to next step.
3. Ensure deck lid release solenoid/ajar switch connector is properly connected. Disconnect 2-pin deck lid release switch connector. Connect 12-volt test light between ground and deck lid release switch connector terminal No. 2, fused B+ circuit (Pink wire). If test light illuminates brightly, leave deck lid release switch connector disconnected, and go to next step. If test light does not illuminate brightly, repair open in Pink wire.
4. Disconnect deck lid release solenoid/ajar switch connector. Connect a 12-volt test light between deck lid release solenoid/ajar switch connector terminal No. 1, ground circuit (Black wire) and terminal No. 3, deck lid release control circuit (Black/White wire). Connect a fused jumper wire between deck lid release switch connector terminals. If test light illuminates brightly with jumper wire connected, replace deck lid release switch. If test light illuminates brightly, leave deck lid release switch connector disconnected, and go to next step.
5. Remove jumper wire. Ensure deck lid release solenoid/ajar switch connector is properly connected. Disconnect Body Control Module (BCM) connector C1. Measure resistance of deck lid release switch output circuit (Black/White wire) between BCM connector C1 terminal No. 1 and deck lid release switch connector. (Scheme 8) If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Black/White wire.
6. Disconnect deck lid release solenoid/ajar switch connector. Remove BCM from back of junction block. Measure resistance of deck lid release control circuit (Black/White wire) between deck lid release solenoid/ajar switch connector terminal No. 3 at terminal No. 8 at BCM connector on back of junction block. (Scheme 9)and (Scheme 46). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Black/White wire.

Door Lock Inhibit Inoperative

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Open driver door. Using scan tool, read DRIVER DOOR AJAR status. If scan tool displays CLOSED, go to next step. If scan tool displays OPEN, perform «DRIVER DOOR AJAR CKT OPEN»(ref-37884-S15696753412001012500000) test under DOOR AJAR SYSTEM.
2. Ensure key is in ignition switch. Using scan tool, read KEY-IN IGNITION status. If scan tool displays CLOSED, replace Body Control Module (BCM). If scan tool displays OPEN, go to next step.
3. Ensure ignition is off. Disconnect ignition switch connector. Connect a fused jumper wire between ignition switch connector terminal No. 2, key-in ignition switch sense circuit (Light Blue wire) and terminal No. 3, ground circuit (Black/Light Green wire). (Scheme 34) Using scan tool, read KEY-IN IGNITION status. If scan tool displays CLOSED, replace ignition switch. If scan tool displays OPEN, leave ignition switch connector disconnected, and go to next step.
4. Remove jumper wire. Ensure all lights are off. Measure resistance between ground and ignition switch connector terminal No. 3, ground circuit (Black/Light Green wire). If resistance is less than 5 ohms, leave ignition switch connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Black/Light Green wire.
5. Disconnect BCM connector C2. Measure resistance of key-ignition switch sense circuit (Light Blue wire) between ignition switch connector terminal No. 2 and BCM connector C2 terminal No. 24. (Scheme 8)and (Scheme 34). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Light Blue wire.

Driver Door Fails To Lock From Any Switch

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Remove driver door unlock relay from junction block. (Scheme 38) Measure resistance between ground and driver door unlock relay connector terminal No. 89. If resistance is less than 5 ohms, replace driver door unlock relay. If resistance is 5 ohms or more, replace junction block.

Driver Door Fails To Unlock From Any Switch

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Remove driver door unlock relay from junction block. (Scheme 38) Connect a 12-volt test light between ground and door unlock relay connector terminal No. 87. If test light illuminates brightly, leave driver door unlock relay removed, and go to next step. If test light does not illuminate brightly, replace junction block.
2. Connect test light between ground and door unlock relay connector terminal No. 88. If test light illuminates brightly, leave driver door unlock relay removed, and go to next step. If test light does not illuminate brightly, replace junction block.
3. Ensure ignition is off. Connect scan tool to Data Link Connector (DLC). Connect test light between driver door unlock relay connector terminals No. 88 and 90. Turn ignition on. Using scan tool, actuate driver door unlock relay. If test light flashes, replace driver door unlock relay. If test light does not flash, leave driver door unlock relay removes, and go to next step.
4. Turn ignition off. Remove Body Control Module (BCM) from back of junction block. Measure resistance between driver door unlock relay connector terminal No. 90 and terminal No. 13 at BCM connector on back of junction block. (Scheme 9)and (Scheme 38). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, replace junction block.

One Door Fails To Lock & Unlock From Any Switch

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. If problem is with driver door, go to next step. If problem is not with driver door, go to step 5.
2. Turn ignition off. Disconnect driver door lock motor/ajar switch connector. Connect a 12-volt test light between driver door lock motor/ajar switch connector terminal No. 3, driver door unlock relay output circuit (Dark Blue wire) and terminal No. 4, door lock relay output circuit (Orange wire). (Scheme 26) Observe test light while pressing door lock switch to lock and unlock positions. If test light flashes when door lock switch is pressed, replace driver door lock motor. If test light does not flash when door lock switch is pressed, leave driver door lock motor/ajar switch connector disconnected, and go to next step.
3. Remove driver door lock relay from junction block. Measure resistance of door lock relay output circuit (Orange wire) between door lock relay connector terminal No. 81 and driver door lock motor/ajar switch connector terminals No. 85 and 86 at driver door unlock relay (component side). (Scheme 38) If resistance is less than 50 ohms, leave driver door lock motor/ajar switch connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Orange wire.
4. Remove door unlock relay from junction block. Measure resistance of door unlock relay output circuit (Dark blue wire) between door unlock relay connector terminal No. 76 and driver door lock motor/ajar switch connector terminal No. 3. If resistance is less than 5 ohms, replace door unlock relay. If resistance is 5 ohms or more, repair open in Dark Blue wire.
5. Turn ignition off. Disconnect suspect door lock motor/ajar switch connector. Connect a 12-volt test light between door lock motor/ajar switch connector terminal No. 3, door unlock relay output circuit (Pink/Black wire) and terminal No. 4, door lock relay output circuit (Orange wire). (Scheme 49) Observe test light while pressing door lock switch to lock and unlock positions. If test light flashes when door lock switch is pressed, replace suspect door lock motor. If test light does not flash when door lock switch is pressed, leave door lock motor/ajar switch connector disconnected, and go to next step.
6. Connect scan tool to Data Link Connector (DLC). Connect a 12-volt test light between ground and suspect door lock motor/ajar switch connector terminal No. 4, lock relay output circuit (Orange wire). Using scan tool, actuate door lock relay. If test light does not flash, repair open in Orange wire. If test light flashes, leave door lock motor/ajar switch connector disconnected, and go to next step.
7. Connect 12-volt test light between ground and suspect door lock motor/ajar switch connector terminal No. 3, unlock relay output circuit (Pink/Back wire). Using scan tool, actuate door unlock relay. If test light does not flash, repair open in Pink/Black wire. If test light flashes, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Scheme 48

Remote Keyless Entry Problem

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Obtain known good Remote Keyless Entry (RKE) transmitter. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Using scan tool, program RKE transmitter. See REMOTE KEYLESS ENTRY TRANSMITTER under PROGRAMMING. Press lock or unlock button on RKE transmitter. If RKE system responds correctly, replace and program new transmitter. If RKE system is inoperative or does not operate correctly, replace RKE module and program all transmitters to be used with vehicle.

Remote Keyless Entry Horn Chirp Inoperative

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Press horn pad on steering wheel. If horn is operating properly, go to next step. If horn does not operate properly, repair horn as necessary. See HORN SYSTEM under TROUBLE SHOOTING in appropriate STEERING COLUMN SWITCHES article.
2. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, read HORN CHIRP status. If scan tool displays ENABLED, go to next step. If scan tool does not display ENABLED, enable horn chirp using scan tool.
3. Turn ignition off. Remove Body Control Module (BCM) from back of junction block. Momentarily connect a fused jumper wire between ground and terminal No. 18 at BCM connector on back of junction block. (Scheme 9) If horn sounds, replace BCM. If horn does not sound, replace junction block.

SPEED PROPORTIONAL STEERING SYSTEM

Note. For speed proportional steering system wiring diagrams, see ELECTRONIC STEERING article in WIRING DIAGRAMS.

Speed PRO Steering CKT Short To Voltage

Note. After making any repairs, perform SPEED PROPORTIONAL STEERING SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Start engine. Turn steering wheel and observe amount of steering assist. Using scan tool, de-activate Speed Proportional Steering (SPS) solenoid for 15 seconds while turning steering wheel and observing amount of steering assist. If steering power assist is unchanged once SPS solenoid is de-activated, go to next step. If steering has less power assist once SPS solenoid is de-activated, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
2. Turn ignition off. Disconnect 2-pin SPS solenoid connector. Measure resistance between SPS solenoid terminals (component side). If resistance is 5.7-6.3 ohms at 68°F (20°C), leave SPS solenoid connector disconnected, and go to next step. If resistance is not 5.7-6.3 ohms at 68°F (20°C), replace SPS solenoid.
3. Start engine. Measure voltage on SPS solenoid connector terminal No. 2, positive (+) circuit (Violet/Orange wire). If any voltage exists, repair short to voltage in Violet/Orange wire, and replace BCM. If no voltage exists, leave engine running, leave SPS solenoid connector disconnected, and go to next step.
4. Measure voltage on SPS solenoid connector terminal No. 1, negative (-) circuit (Light Green/Pink wire). If any voltage exists, repair short to voltage in Light Green/Pink wire, and replace BCM. If no voltage exists, leave SPS solenoid connector disconnected, and go to next step.
5. Turn ignition off. Remove BCM from back of junction block. Measure resistance between terminals No. 3 and 4 at BCM connector on back of junction block. (Scheme 9) If resistance is less than 100 ohms, repair SPS solenoid negative (-) circuit (Light Green/Pink wire) for short to SPS solenoid positive (+) circuit (Violet/Orange wire) between SPS solenoid and BCM connector C10. If resistance is 100 ohms or more, replace BCM.

Speed PRO Steering Solenoid CKT Open/Shorted To Ground

Note. After making any repairs, perform SPEED PROPORTIONAL STEERING SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Start engine. Turn steering wheel and observe amount of steering assist. Using scan tool, de-activate Speed Proportional Steering (SPS) solenoid for 15 seconds while turning steering wheel and observing amount of steering assist. If steering power assist is unchanged once SPS solenoid is de-activated, go to next step. If steering has less power assist once SPS solenoid is de-activated, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
2. Turn ignition off. Disconnect 2-pin SPS solenoid connector. Measure resistance between SPS solenoid terminals (component side). If resistance is 5.7-6.3 ohms at 68°F (20°C), leave SPS solenoid connector disconnected, and go to next step. If resistance is not 5.7-6.3 ohms at 68°F (20°C), replace SPS solenoid.
3. Measure resistance between ground and SPS solenoid connector terminal No. 2, positive (+) circuit (Violet/Orange wire). If resistance is less than 100 ohms, repair short to ground in Violet/Orange wire. If resistance is 100 ohms or more, leave SPS solenoid connector disconnected, and go to next step.
4. Measure resistance between ground and SPS solenoid connector terminal No. 1, negative (-) circuit (Light Green/Black wire). If resistance is less than 100 ohms, repair short to ground in Violet/Orange wire. If resistance is 100 ohms or more, leave SPS solenoid connector disconnected, and go to next step.
5. Remove BCM from back of junction block. Measure resistance of SPS solenoid negative (-) circuit (Light Green/Pink wire) between SPS solenoid connector and terminal No. 3 at BCM connector on back of junction block. (Scheme 9) If resistance is less than 5 ohms, leave BCM removed, SPS solenoid connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Light Green/Pink wire.
6. Measure resistance between terminals No. 3 and 4 at BCM connector on back of junction block. If resistance is less than 100 ohms, repair SPS solenoid negative (-) circuit (Light Green/Pink wire) for short to SPS solenoid positive (+) circuit (Violet/Orange wire) between SPS solenoid and BCM connector C10. If resistance is 100 ohms or more, leave BCM removed, SPS solenoid connector disconnected, and go to next step.
7. Measure resistance of SPS solenoid positive (+) circuit (Violet/Orange wire) between SPS solenoid and terminal No. 4 at BCM connector on back of junction block. If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Violet/Orange wire between SPS solenoid and BCM connector C10.

Speed PRO Steering Solenoid Over-Temperature

Note. After making any repairs, perform SPEED PROPORTIONAL STEERING SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Start engine. Turn steering wheel and observe amount of steering assist. Using scan tool, de-activate Speed Proportional Steering (SPS) solenoid for 15 seconds while turning steering wheel and observing amount of steering assist. If steering power assist is unchanged once SPS solenoid is de-activated, go to next step. If steering has less power assist once SPS solenoid is de-activated, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
2. Turn ignition off. Disconnect SPS solenoid connector. Measure resistance between SPS solenoid terminals (component side). If resistance is 5.7-6.3 ohms at 68°F (20°C), leave SPS solenoid connector disconnected, and go to next step. If resistance is not 5.7-6.3 ohms at 68°F (20°C), replace SPS solenoid.
3. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000) . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, replace Body Control Module (BCM).

VTSS

Note. For Vehicle Theft/Security System (VTSS) wiring diagrams, see WIRING DIAGRAMS in appropriate ANTI-THEFT SYSTEMS article.

Alarm Does Not Trip From Driver Door

Note. After making any repairs, perform VEHICLE THEFT SECURITY SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Turn ignition off. Connect scan tool to Data Link Connector (DLC). Using scan tool, read DR DOOR AJAR SW status. Open driver door. If scan tool displays CLOSED, replace Body Control Module (BCM). If scan tool displays OPEN, perform DRIVER DOOR AJAR CKT OPEN test under DOOR AJAR SYSTEM.

Alarm Does Not Trip From Left Rear Door

Note. After making any repairs, perform VEHICLE THEFT SECURITY SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Turn ignition off. Connect scan tool to Data Link Connector (DLC). Using scan tool, read LR DOOR AJAR SW status. Open left rear door. If scan tool displays CLOSED, replace Body Control Module (BCM). If scan tool displays OPEN, perform LEFT REAR DOOR AJAR CKT OPEN test under DOOR AJAR SYSTEM.

Alarm Does Not Trip From Passenger Door

Note. After making any repairs, perform VEHICLE THEFT SECURITY SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Turn ignition off. Connect scan tool to Data Link Connector (DLC). Using scan tool, read PASS DOOR AJAR SW status. Open passenger door. If scan tool displays CLOSED, replace Body Control Module (BCM). If scan tool displays OPEN, perform PASS DOOR AJAR CKT OPEN test under DOOR AJAR SYSTEM.

Alarm Does Not Trip From Right Rear Door

Note. After making any repairs, perform VEHICLE THEFT SECURITY SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Turn ignition off. Connect scan tool to Data Link Connector (DLC). Using scan tool, read RR DOOR AJAR SW status. Open right rear door. If scan tool displays CLOSED, replace Body Control Module (BCM). If scan tool displays OPEN, perform RIGHT REAR DOOR AJAR CKT OPEN test under DOOR AJAR SYSTEM.

Alarm Does Not Trip With Trunk Knockout Switch

Note. After making any repairs, perform VEHICLE THEFT SECURITY SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Turn ignition off. Disconnect Body Control Module (BCM) connector C4. Disconnect trunk knockout switch connector. Connect a 12-volt test light between battery voltage and BCM C4 connector terminal No. 8, deck lid security switch sense circuit (Violet/White wire). If test light illuminates, repair short to ground in Violet/White wire. If test light does not illuminate, replace BCM.

Alarm Trips On Its Own

Turn ignition off. Connect scan tool to Data Link Connector (DLC). Using scan tool, read ALARM TRIP BY status. If scan tool displays any causes for alarm tripping, repair intermittent alarm tripping condition. If scan tool does not display any causes for alarm tripping, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See WIRING DIAGRAMS . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Alarm Will Not Arm

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, read THEFT ALARM status. If scan tool displays ENABLED, go to next step. If scan tool does not display ENABLED, enable Vehicle Theft Security System (VTSS).
2. Using scan tool, retrieve Body Control Module (BCM) DTCs. If any DTCs exist, perform appropriate test. See «DIAGNOSTIC TROUBLE CODE IDENTIFICATION»(ref-37884-S09732796892001011000000) table under SELF-DIAGNOSTIC SYSTEM. If no DTCs exist, replace BCM.

Driver Door Key Fails To Arm Or Disarm Alarm

Note. After making any repairs, perform VEHICLE THEFT SECURITY SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Using scan tool, read DRV DOOR ARM/DISARM SW voltage. Rotate key in driver cylinder lock switch to lock and unlock positions. If scan tool displays 3.5-4.5 volts in lock position and 6.0-7.0 volts in unlock position, replace Body Control Module (BCM). If scan tool does not display 3.5-4.5 volts in lock position and 6.0-7.0 volts in unlock position, go to next step.
2. Disconnect 2-pin driver cylinder lock switch connector. Connect a 12-volt test light between ground and driver cylinder lock switch connector terminal No. 2, fused B+ circuit (Pink wire). If test light illuminates, leave driver cylinder lock switch connector disconnected, and go to next step. If test light does not illuminate, repair open in Pink wire.
3. Disconnect BCM connector C4. Connect 12-volt test light between battery voltage and BCM connector C4 terminal No. 13, driver cylinder lock switch MUX circuit (Light Green/Orange wire). (Scheme 8) If test light illuminates, repair short to ground in Light Green/Orange wire. If test light does not illuminate, leave connectors disconnected, and go to next step.
4. Measure resistance of driver cylinder lock switch MUX circuit (Light Green/Orange wire) between driver cylinder lock switch terminal No. 1 and BCM connector C4 terminal No. 13. If resistance is less than 5 ohms, replace driver cylinder lock switch. If resistance is 5 ohms or more, repair open in Light Green/Orange wire.

Hazard Lights Fail To Flash With Alarm Tripped

Note. After making any repairs, perform VEHICLE THEFT SECURITY SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn hazard lights on. If hazard lights operate properly, replace Body Control Module (BCM). If hazard lights do not operate properly, go to next step.
2. Turn hazard lights off. Substitute a known-good combination flasher. Turn hazard lights on. If hazard lights operate properly, replace combination flasher. If hazard lights do not operate properly, repair hazard lights as necessary. See EXTERIOR LIGHTS article.

Headlight/Park Lights Fail To Flash With Alarm Tripped

Note. After making any repairs, perform VEHICLE THEFT SECURITY SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Turn low beam headlights on. If headlights and parking lights operate properly, replace BCM. If headlights and parking lights do not operate properly, repair lights as necessary. Perform LOW BEAM HEADLIGHTS WILL NOT TURN ON test under EXTERIOR LIGHTING SYSTEMS.

Horn Fails To Sound With Alarm Tripped

Note. After making any repairs, perform VEHICLE THEFT SECURITY SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Press horn pad on steering wheel. If horn operates properly, go to next step. If horn does not operate properly, repair horn as necessary. See appropriate STEERING COLUMN SWITCHES article.
2. Turn ignition off. Remove Body Control Module (BCM) from back of junction block. Connect a 12-volt test light between battery voltage and terminal No. 18 at BCM connector on back of junction block. (Scheme 9) Press horn pad on steering wheel. If test light illuminates when horn pad is pressed, replace BCM. If test light does not illuminate when horn pad is pressed, replace junction block.

Passenger Door Key Fails To Arm Or Disarm Alarm

Note. After making any repairs, perform VEHICLE THEFT SECURITY SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Using scan tool, read PASS DOOR ARM/DISARM SW voltage. Rotate key in passenger cylinder lock switch to lock and unlock positions. If scan tool displays 3.5-4.5 volts in lock position and 6.0-7.0 volts in unlock position, replace Body Control Module (BCM). If scan tool does not display 3.5-4.5 volts in lock position and 6.0-7.0 volts in unlock position, go to next step.
2. Disconnect 2-pin passenger cylinder lock switch connector. Connect a 12-volt test light between ground and passenger cylinder lock switch connector terminal No. 2, fused B+ circuit (Pink wire). If test light illuminates, leave passenger cylinder lock switch connector disconnected, and go to next step. If test light does not illuminate, repair open in Pink wire.
3. Disconnect BCM connector C4. Connect 12-volt test light between battery voltage and BCM connector C4 terminal No. 3, passenger cylinder lock switch MUX circuit (Dark Green/Orange wire). (Scheme 8) If test light illuminates, repair short to ground in Dark Green/Orange wire. If test light does not illuminate, leave connectors disconnected, and go to next step.
4. Measure resistance of passenger cylinder lock switch MUX circuit (Dark Green/Orange wire) between passenger cylinder lock switch terminal No. 1 and BCM connector C4 terminal No. 3. If resistance is less than 5 ohms, replace passenger cylinder lock switch. If resistance is 5 ohms or more, repair open in Dark Green/Orange wire.

VTSS Indicator Inoperative

Note. After making any repairs, perform VEHICLE THEFT SECURITY SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect sun sensor/Vehicle Theft Security System (VTSS) indicator connector. Measure voltage on sun sensor/VTSS indicator connector terminal No. 1, fused B+ circuit (Pink wire). (Scheme 37) If voltage is more than 10 volts, leave sun sensor/VTSS indicator connector disconnected, and go to next step. If voltage is 10 volts or less, repair open in Pink wire.
2. Connect scan tool to Data Link Connector (DLC). Using an external voltmeter, connect positive lead to battery voltage, and negative lead to sun sensor/VTSS indicator connector terminal No. 2, VTSS indicator driver circuit (Black/Orange wire). Go to next step.
3. Turn ignition on. Using scan tool, actuate VTSS indicator. If voltmeter displays more than 10 volts when VTSS indicator is actuated, replace sun sensor/VTSS indicator. If voltmeter display 10 volts or less, leave connectors disconnected, and go to next step.
4. Turn ignition off. Disconnect Body Control Module (BCM) connector C2. Measure resistance of sun sensor/VTSS indicator driver circuit (Black/Orange wire) between sun sensor/VTSS indicator connector terminal No. 2 and BCM connector C2 terminal No. 23. (Scheme 8) If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Black/Orange wire.

WINDSHIELD WIPER SYSTEM

Note. For windshield wiper system wiring diagrams, see WIRING DIAGRAMS in appropriate WIPER/WASHER SYSTEMS article.

Headlight Washers Not Operating Properly

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn on parking lights, fog lights, low beam headlights, then high beam headlights. If all exterior light operate properly, go to next step. If any exterior lights do not operate properly, repair exterior lights as necessary. See EXTERIOR LIGHTS article.
2. Turn low speed windshield wipers on. Push and release wash button on multifunction switch. If windshield wipers and washers operate properly, go to next step. If windshield wipers and washers do not operate properly, repair by symptom. Perform appropriate test under WINDSHIELD WIPER SYSTEM. See «SYMPTOM IDENTIFICATION»(ref-37884-S39909830572001011000000) table under SELF-DIAGNOSTIC SYSTEM.
3. Turn ignition off. Remove headlight washer relay from Power Distribution Center (PDC). (Scheme 25) Connect a 12-volt test between ground and headlight washer relay connector terminal "B", fused B+ circuit (Red/Yellow wire), then terminal "C", fused B+ circuit (Red/Yellow wire). If test light illuminates at both terminals, go to next step. If test light does not illuminate at both terminals, repair open in Red/Yellow wire(s).
4. Substitute a known-good headlight washer relay. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, actuate headlight washer relay. If headlight washers operate, replace headlight washer relay. If headlight washers do not operate, go to next step.
5. Turn ignition off. Disconnect 2-pin headlight washer pump motor connector. Connect 12-volt test light between headlight washer pump motor connector. Using scan tool, actuate headlight washer relay. If test light flashes, replace headlight washer pump motor. If test light does not flash, go to next step.
6. Remove headlight washer relay. Turn ignition on. Measure voltage on headlight washer relay connector terminal "D", headlight washer relay output circuit (Red/Orange wire). If voltage is more than one volt, repair short to voltage in Red/Orange wire. If voltage is one volt or less, leave headlight washer relay removed, and go to next step.
7. Turn ignition off. Disconnect headlight washer pump motor connector. Measure resistance between ground and headlight washer relay connector terminal No. "D", headlight washer relay output circuit (Red/Orange wire). If resistance is more than 100 ohms, leave headlight washer relay removed, headlight washer pump motor connector disconnected, and go to next step. If resistance is 100 ohms or less, repair short to ground in Red/Orange wire.
8. Measure resistance of headlight washer relay output circuit (Red/Orange wire) between headlight washer relay connector terminal "D" and headlight washer pump motor connector terminal No. 2. If resistance is less than 5 ohms, leave headlight washer pump motor connector disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Red/Orange wire.
9. Connect 12-volt test light between battery voltage and headlight washer pump motor connector terminal No. 1, ground circuit (Black wire). If test light illuminates, go to next step. If headlight does not illuminate, repair open in Black wire.
10. Ensure ignition is off. Disconnect Body Control Module (BCM) connector C3. Remove headlight washer relay. Turn ignition on. Measure voltage on headlight washer relay connector terminal "A", headlight washer relay control circuit (Brown/Yellow wire). If voltage is more than one volt, repair short to voltage in Red/Yellow wire. If voltage is one volt or less, leave headlight washer relay removed, BCM connector C3 disconnected, and go to next step.
11. Turn ignition off. Measure resistance between ground and headlight washer relay connector terminal "A", headlight washer relay control circuit (Brown/Yellow wire). If resistance is more than 100 ohms, leave headlight washer relay removed, BCM connector C3 disconnected, and go to next step. If resistance is 100 ohms or less, repair short to ground in Brown/Yellow wire.
12. Measure resistance of headlight washer relay control circuit (Brown/Yellow wire) between BCM connector C3 terminal No. 9 and headlight washer relay connector terminal "A". (Scheme 8)and (Scheme 25). If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Brown/Yellow wire.

Washer Inoperative

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Disconnect junction block connector C1. Turn ignition on. Connect a 12-volt test light between ground and junction block connector C1 terminal No. 3, ignition switch output ACC/RUN circuit (Black/White wire). (Scheme 9) If test light illuminates, go to next step. If test light does not illuminate, repair open in Black/White wire.
2. Turn ignition off. Remove and inspect fuse No. 5 (10-amp) in junction block. If fuse is open, leave fuse removed, and go to next step. If fuse is okay, install fuse, and go to step 6.
3. Disconnect multifunction switch connector. Measure resistance between ground and junction block connector C1 terminal No. 3, ignition switch output ACC/RUN circuit (Black/White wire). If resistance is less than 100 ohms, repair short to ground in Black/White wire. If resistance is 100 ohms or more, leave multifunction switch connector disconnected, and go to next step.
4. Disconnect Body Control Module (BCM) connector C2. Disconnect washer pump motor connector. Measure resistance between ground and BCM connector C2 terminal No. 7, washer pump motor control switch output circuit (Brown wire). (Scheme 8) If resistance is less than 100 ohms, repair short to ground in Brown wire. If resistance is 100 ohms or more, leave multifunction switch connector disconnected, and go to next step.
5. Remove multifunction switch from steering column. Ensure washer switch is in off position. Measure resistance between multifunction switch (component side) terminal No. 1 and all other multifunction switch (component side) terminals. see scheme 48 If any resistance is less than 5 ohms, replace multifunction switch. If all resistances are 5 ohms or more, replace washer pump motor.
6. Disconnect multifunction switch connector. Turn ignition on. Connect a 12-volt test light between ground and multifunction switch connector terminal No. 1, fused ignition switch output circuit (Dark Blue wire). (Scheme 39) If test light illuminates, go to next step. If test light does not illuminate, repair open in Dark Blue wire.
7. Turn ignition off. Ensure multifunction switch connector is properly connected. Disconnect 2-pin washer pump motor connector. Connect 12-volt test light between battery voltage and washer pump motor connector terminal No. 2, ground circuit (Black wire). If test light illuminates, leave washer pump motor connector disconnected, and go to next step. If test light does not illuminate, repair open in Black wire.
8. Turn ignition on. Connect 12-volt test light between ground and washer pump motor connector terminal No. 1, washer pump motor control switch output circuit (Brown wire). Observe test light while operating washer switch. If test light illuminates, go to next step. If test light does not illuminate, repair open in Brown wire.
9. Turn ignition off. Disconnect multifunction switch connector. Remove multifunction switch from steering column. Measure resistance between multifunction switch (component side) terminals No. 1 and 2 while operating washer switch. see scheme 48 Resistance should be less than 5 ohms when washer switch is pressed and more than 100 ohms when wiper switch is released. If resistance is not as specified, replace multifunction switch. If resistance is as specified, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Scheme 49

Washer Runs At All Times With Ignition On

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Turn ignition off. Ensure washer switch is in off position. Disconnect multifunction switch connector. Turn ignition on. If washer stops running when multifunction switch is disconnected, replace multifunction switch. If washer continues to run when multifunction switch is disconnected, repair short to voltage in washer pump motor control output circuit (Brown wire) between multifunction switch, BCM and washer pump motor. See WIRING DIAGRAMS .

Wiper Not Wiping After Wash

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition on. Operate wipers in all speeds. If wipers operate properly, go to next step. If wipers do not operate properly, repair by symptom. Perform appropriate test under WINDSHIELD WIPER SYSTEM. See «SYMPTOM IDENTIFICATION»(ref-37884-S39909830572001011000000) table under SELF-DIAGNOSTIC SYSTEM.
2. Turn wipers off. Turn ignition off. Disconnect Body Control Module (BCM) connector C2. Turn ignition on. Connect a 12-volt test light between ground and BCM connector C2 terminal No. 7, washer pump control switch output circuit (Brown wire). (Scheme 8) Monitor test light while pressing and releasing washer switch. If test light flashes, replace BCM. If test light does not flash, repair open in Brown wire.

Wiper Not Working At All

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Remove wiper on/off relay from Power Distribution Center (PDC). (Scheme 25) Connect a fused jumper wire between wiper on/off relay connector terminal "A", fused B+ circuit (Red/Orange wire) and terminal "B", wiper relay common circuit (Dark Green wire). If wipers operate, disconnect jumper wire, and go to next step. If wipers do not operate, leave wiper on/off relay removed, disconnect jumper wire, and go to step 14.
2. Ensure wiper on/off relay is properly installed in PDC. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, read INTERMITTENT WIPER SWITCH status while operating wiper switch from off to high positions. If voltage increases from zero to 8.5 volts as switch is turned from off to high, go to next step. If voltage does not increase from zero to 8.5 volts as switch is turned from off to high, go to step 9.
3. Turn ignition off. Remove wiper on/off relay. Connect a 12-volt test light between ground and wiper on/off relay connector terminal "A", fused B+ circuit (Red/Orange wire). If test light illuminates, leave wiper on/off relay removed, and go to next step. If test light does not illuminate, repair open in Red/Orange wire.
4. Substitute known-good wiper on/off relay. Turn ignition on. Operate wipers in all speeds. If wipers operate properly, replace wiper on/off relay. If wipers do not operate properly, go to next step.
5. Turn ignition off. Remove wiper on/off relay. Disconnect Body Control Module (BCM) connector C3. Turn ignition on. Connect a jumper wire between ground and BCM connector terminal No. 4, wiper on/off relay control circuit (Red/Violet wire). (Scheme 8) Measure resistance between ground and wiper on/of relay connector terminal "C", wiper on/off relay control circuit (Red/Violet wire). If resistance is less than 5 ohms, leave wiper on/off relay removed, BCM connector C3 disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Red/Violet wire.
6. Remove jumper wire. Turn ignition on. Measure voltage on BCM connector C3 terminal No. 4, wiper on/off relay control circuit (Red/Violet wire). If voltage is more than one volt, repair short to voltage in Red/Violet wire. If voltage is one volt or more, go to next step.
7. Turn ignition off. Reinstall wiper on/off relay. Ensure BCM connectors are properly connected. Disconnect multifunction switch connector. Turn ignition on. Connect a 12-volt test light between ground and multifunction switch connector terminal No. 5, fused B+ circuit (Pink/Red wire). (Scheme 39) If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open in Pink/Red wire.
8. Remove wiper on/off relay. Connect 12-volt test light between battery voltage and wiper on/off relay connector terminal "C", wiper on/off relay control circuit (Red/Violet wire). Using scan tool, actuate wiper on/off relay. If test light does not flash, replace BCM. If test light flashes, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
9. Turn ignition off. Disconnect multifunction switch connector. Turn ignition on. Connect a 12-volt test light between ground and multifunction switch connector terminal No. 1, fused ignition switch output circuit (Dark Blue wire). (Scheme 39) If test light illuminates brightly, leave multifunction switch connector disconnected, and go to next step. If test light does not illuminate brightly, repair open in Dark Blue wire.
10. Turn ignition off. Disconnect Body Control Module (BCM) connector C2. Turn ignition on. Measure voltage on BCM connector C2 terminal No. 8, wiper switch MUX circuit (Dark Green/Red wire). (Scheme 8) If voltage is more than one volt, repair short to voltage in Dark Green/Red wire. If voltage is one volt or less, leave connectors disconnected, and go to next step.
11. Turn ignition off. Measure resistance of wiper switch MUX circuit (Dark Green/Red wire) between BCM connector C2 connector terminal No. 8 and multifunction switch connector terminal No. 3. (Scheme 8)and (Scheme 39). If resistance is less than 5 ohms, leave connectors disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Dark Green/Red wire.
12. Measure resistance between ground and BCM connector C2 terminal No. 8, wiper switch MUX circuit (Dark Green/Red wire). If resistance is less than 100 ohms, repair short to ground in Dark Green/Red wire. If resistance is 100 ohms or more, leave multifunction switch connector disconnected, and go to next step.
13. Ensure BCM connectors are properly connected. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, read INTERMITTENT WIPER SWITCH voltage. Momentarily connect a 12-volt test light between battery voltage and multifunction switch connector terminal No. 3, wiper switch MUX circuit (Dark Green/Red wire). If voltage changes from zero to more than 10 volts, replace multifunction switch. If voltage does not change from zero to more than 10 volts, replace BCM.
14. Connect a 12-volt test between ground and wiper on/off relay connector terminal "A", fused B+ circuit (Red/Orange wire), then terminal "D", fused B+ circuit (Red/Orange wire). If test light illuminates brightly at both terminals, go to next step. If test light does not illuminate brightly at both terminals, repair open in Red/Orange wire(s).
15. Disconnect wiper motor connector. Connect 12-volt test light between battery voltage and wiper motor connector terminal No. 5, ground circuit (Black wire). see scheme 49 If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open in Black wire.
16. Install a known-good wiper on/off relay. Turn ignition on. Operate wipers in low, then high speeds. If wipers operate properly, replace wiper on/off relay. If wipers do not operate properly, go to next step.
17. Turn ignition off. Remove wiper on/off relay and wiper high/low relay from power distribution center. Measure resistance of wiper relay common feed circuit (Dark Green wire) between ground and wiper high/low relay connector terminal "B". (Scheme 25) If resistance is less than 100 ohms, repair short to ground in Dark Green wire. If resistance is 100 ohms or more, leave relays removed, and go to next step.
18. Measure resistance of wiper relay common feed circuit (Dark Green wire) between wiper on/off relay connector terminal "B" and wiper high/low relay connector terminal "B". If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Dark Green wire.
19. Turn ignition on. Disconnect wiper motor connector. Connect 12-volt test light between ground and wiper motor connector terminal No. 2, wiper relay low speed output circuit (Brown/White wire). Turn wiper speed to low speed. If test light illuminates brightly, replace wiper motor. If test light does not illuminate brightly, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.

Wiper Not Working In High Speed

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Remove wiper high/low relay from Power Distribution Center (PDC). (Scheme 25) Connect a jumper wire between wiper high/low relay connector terminal "A", fused B+ circuit (Red/Orange wire) and terminal "D", wiper high/low relay high speed output circuit (Red/Yellow wire). If windshield wipers operate at high speed, leave wiper high/low relay removed, and go to next step. If windshield wipers do not operate at high speed, leave wiper high/low relay removed, and go to step 6.
2. Remove jumper wire. Substitute a known-good wiper high/low relay. Turn ignition on. Operate wipers in low, then high speed. If wipers operate properly, replace wiper high/low relay. If wipers do not operate properly, install original wiper high/low relay, and go to next step.
3. Turn wipers off. Turn ignition off. Disconnect multifunction switch connector. Remove multifunction switch from steering column. Set multifunction switch in high position. Measure resistance between multifunction switch (component side) terminals No. 1 and 3. see scheme 48 If resistance is 480-540 ohms, go to next step. If resistance is not 480-540 ohms, replace multifunction switch.
4. Remove wiper high/low relay. Disconnect Body Control Module (BCM) connector C3. Turn ignition on. Measure voltage on BCM connector C3 terminal No. 12, wiper high/low relay control circuit (Violet wire). (Scheme 8) If any voltage exists, repair short to voltage in Violet wire. If no voltage exists, leave wiper high/low relay removed, BCM connector C3 disconnected, and go to next step.
5. Turn ignition off. Measure resistance of wiper high/low relay control circuit (Violet wire) between BCM connector C3 terminal No. 12 and high/low relay connector terminal "C". If resistance is less than 5 ohms, replace BCM. If resistance is 5 ohms or more, repair open in Violet wire.
6. Remove jumper wire. Turn wipers off. Connect a 12-volt test light between ground and wiper high/low relay connector terminal "A", fused B+ circuit (Red/Orange wire). If test light illuminates brightly, leave wiper high/low relay removed, and go to next step. If test light does not illuminate brightly, repair open in Red/Orange wire.
7. Disconnect wiper motor connector. Connect a fused jumper wire between ground and wiper motor connector terminal No. 1, wiper relay high speed output circuit (Red/Yellow wire). see scheme 49 Connect 12-volt test light between battery voltage and wiper high/low relay connector terminal "D", wiper relay high speed output circuit (Red/Yellow wire). If test light illuminates brightly, leave wiper high/low relay removed, wiper motor connector disconnected, and go to next step. If test light does not illuminate brightly, repair open in Red/Yellow wire.
8. Measure resistance between ground and wiper motor connector terminal No. 1, wiper relay high speed output circuit (Red/Yellow wire). If resistance is less than 100 ohms, repair short to ground in Red/Yellow wire. If resistance is 100 ohms or more, replace wiper motor.

Wiper Not Working In Low Speed

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Remove wiper high/low relay from Power Distribution Center (PDC). (Scheme 25) Connect a jumper wire between wiper high/low relay connector terminal "A", fused B+ circuit (Red/Orange wire) and terminal "E", wiper high/low relay low speed output circuit (Brown/White wire). If windshield wipers operate at low speed, leave wiper high/low relay removed, and go to next step. If windshield wipers do not operate at low speed, leave wiper high/low relay removed, and go to step 5.
2. Remove jumper wire. Substitute a known-good wiper high/low relay. Turn ignition on. Operate wipers in low, then high speed. If wipers operate properly, replace wiper high/low relay. If wipers do not operate properly, install original wiper high/low relay, and go to next step.
3. Turn wipers off. Turn ignition off. Disconnect multifunction switch connector. Remove multifunction switch from steering column. Set multifunction switch in low position. Measure resistance between multifunction switch (component side) terminals No. 1 and 3. see scheme 48 If resistance is 980-1060 ohms, go to next step. If resistance is not 980-1060 ohms, replace multifunction switch.
4. Remove wiper high/low relay. Disconnect Body Control Module (BCM) connector C3. Measure resistance between ground and BCM connector C3 terminal No. 12, wiper high/low relay control circuit (Violet wire). (Scheme 8) If resistance is less than 100 ohms, repair short to ground in Violet wire. If resistance is 100 ohms or more, replace BCM.
5. Remove jumper wire. Turn wipers off. Connect a 12-volt test light between ground and wiper high/low relay connector terminal "A", fused B+ circuit (Red/Orange wire). If test light illuminates, leave wiper high/low relay removed, and go to next step. If test light does not illuminate, repair open in Red/Orange wire.
6. Disconnect wiper motor connector. Measure resistance of wiper high/low relay low speed output circuit (Brown/White wire) between wiper high/low relay connector terminal "E" and wiper motor connector terminal No. 2. see scheme 49 If resistance is less than 5 ohms, replace wiper motor. If resistance is 5 ohms or more, repair open in Brown/White wire.

Wiper Park Switch Failure (Wipers Run Continuously)

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, clear Body Control Module (BCM) DTCs. Turn ignition off, then on. Turn wiper switch to each intermittent position, then to low and high. Turn wiper switch off. Using scan tool, retrieve BCM DTCs. If WIPER PARK SWITCH FAILURE DTC resets, go to next step. If WIPER PARK SWITCH FAILURE DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See «WIRING DIAGRAMS»(ref-37884-S20269144402001011000000). Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
2. Turn ignition off. Disconnect wiper motor connector. Disconnect BCM connector C3. Turn ignition on. Measure voltage on wiper motor connector terminal No. 4, wiper park switch sense circuit (Tan/Red wire). see scheme 49 If no voltage exists, leave connectors disconnected, and go to next step. If any voltage exists, repair short to voltage in Tan/Red wire.
3. Turn ignition off. Measure resistance of wiper park switch sense circuit (Tan/Red wire) between wiper motor connector terminal No. 4 and BCM connector C3 terminal No. 3. (Scheme 8)and see scheme 49. If resistance is less than 5 ohms, leave connectors disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Tan/Red wire.
4. Measure resistance between ground and BCM connector C3 terminal No. 3, wiper park switch sense circuit (Tan/Red wire). If resistance is less than 100 ohms, repair short to ground in Tan/Red wire. If resistance is 100 ohms or more, leave wiper motor connector disconnected, and go to next step.
5. Ensure ignition, all lights and accessories are off. Ensure BCM connectors are properly connected. Connect a 12-volt test light between battery voltage and wiper motor connector terminal No. 5, ground circuit (Black wire). If test light illuminates, leave wiper motor connector disconnected, and go to next step. If test light does not illuminate, repair open in Black wire.
6. Turn ignition on. Using scan tool, monitor WIPER PARK SWITCH status. Using a fused jumper wire, momentarily ground wiper motor connector terminal No. 4, wiper park switch sense circuit (Tan/Red wire) while observing scan tool display. If WIPER PARK SWITCH status changes, replace wiper motor. If WIPER PARK SWITCH status does not change, replace BCM.

Wiper Runs All The Time With Ignition On

Note. After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

1. Install a known-good wiper on/off relay in power distribution center. (Scheme 25) Turn ignition on. Check wiper operation. If wipers operate properly, replace wiper on/off relay. If wipers do not operate properly, go to next step.
2. Turn ignition off. Remove wiper on/off relay from power distribution center. Disconnect Body Control Module (BCM) connector C3. Measure resistance between ground and wiper on/off relay connector terminal "C", wiper on/off control circuit (Red/Violet wire). (Scheme 25) If resistance is less than 100 ohms, repair short to ground in Red/Violet wire. If resistance is 100 ohms or more, leave BCM connector C3 disconnected, and go to next step
3. Remove wiper high/low relay from power distribution center. Disconnect wiper motor connector. Turn ignition on. Measure voltage on wiper high/low relay connector terminal "E", wiper low speed output circuit (Brown/White wire). If voltage exists, repair short to voltage in Brown/White wire. If voltage does not exist, leave wiper high/low relay removed, wiper motor connector disconnected, and go to next step.
4. Measure voltage on wiper high/low relay connector terminal "D", wiper high speed output circuit (Red/Yellow wire). If voltage exists, repair short to voltage in Red/Yellow wire. If voltage does not exist, leave wiper high/low relay removed, and go to next step.
5. Measure voltage on wiper high/low relay connector terminal No. 2, wiper relay common circuit (Dark Green wire). If voltage exists, repair short to voltage in Dark Green wire. If volage does not exist, replace BCM.

Note. If Powertrain Control Module (PCM) has been replaced, the correct vehicle mileage and Vehicle Identification Number (VIN) must be programmed into replacement PCM to prevent DTCs from being set in Anti-Lock Brake System (ABS) Controller Anti-Lock Brake (CAB) and Occupant Restraint Controller (ORC). If replacing Powertrain Control Module (PCM) on models equipped with a Smart Key Immobilizer Module (SKIM), secret key data must also be updated to enable engine starting. To program PCM, see POWERTRAIN CONTROL MODULE under PROGRAMMING.

Note. If Sentry Key Immobilizer Module (SKIM) has been replaced, SKIM and at least 2 sentry keys must be programmed. To program SKIM, see SENTRY KEY IMMOBILIZER MODULE under PROGRAMMING. To program sentry keys, see SENTRY KEYS under PROGRAMMING.

Note. If Transmission Control Module (TCM) has been replaced, TCM must be programmed. To program TCM, see TRANSMISSION CONTROL MODULE under PROGRAMMING.