Body Control Modules: Other Dodge Cab & Chassis R2500

ANTI-LOCK BRAKE SYSTEM CONTROL MODULE

ABS uses a Controller Anti-Lock Brake (CAB) module. CAB module monitors wheel speeds to modulate hydraulic pressure in each brake channel, when ABS or traction control are activated to prevent wheel lock-up under severe conditions to provide improved vehicle control. CAB module communicates with other modules via Programmable Communication Interface (PCI) bus circuit. For additional information on ABS, see appropriate ANTI-LOCK article in BRAKES.

CENTRAL TIMER MODULE

Central Timer Module (CTM), controls air bag, chime, courtesy lights, illuminated entry, power door locks, remote keyless entry, speed sensitive intermittent wipers and vehicle theft security system. Module is located to right side of steering column, behind knee bolster.

CHIME

Chime system is built into CTM. System also supports external chime requests from instrument cluster. There are 2 chime rates: 50 chimes per minute for reminders, and 180 chimes a minute for serious conditions that require immediate attention.

CHRYSLER COLLISION DETECTION BUS SYSTEM

Chrysler Collision Detection (CCD) bus is a pair of twisted wires traveling from module to module receiving and delivering coded information. Code identifies message and its importance. When multiple messages attempt to access CCD bus at once, code assigns priority ranking.

CCD bus uses a 2 wire network to communicate with modules. The 2 twisted wires used by CCD bus system are called bus "+" (positive) and bus "-" (negative). Both wires carry approximately 2.5 volts. Network consists of some modules with "bias" and some with "termination".

Bias is part of voltage divider network which places both bus "+" and bus "-" at 2.5 volts. Termination is part of circuitry required to complete voltage divider network and also provide some electromagnetic protection for CCD bus. Terminations in all CCD applications have approximately 120 ohms resistance.

COMPASS/MINI-TRIP COMPUTER

Compass/Mini-Trip Computer (CMTC) is located in overhead console. This display provides a digital readout of ambient temperature, 8 primary compass readings to indicate direction vehicle is facing, trip odometer that indicates distance traveled and fuel economy function that shows distance to empty and miles per gallon.

HEATED SEAT

Optional leather covered heated seats are available. Heated seat components include: instrument panel mounted switches with instrument panel illumination and indicator LEDs, Seat Heat Interface Module (SHIM), leather seat cover mounted heating elements with sensors and heated seat relay. Driver and passenger can select off, low or high heating for each seat. Low temperature is about 97°F (36°C), high temperature is about 108°F (42°C). Central timer module energizes heated seat relay to allow operation only when engine is running. SHIM monitors system and will flash indicators to report failures.

ENHANCED ACCIDENT RESPONSE

Enhanced accident response is included in high-line CTM only. After CTM is notified of air bag deployment, door locks will unlock and lock function will be disabled for a predetermined time, and courtesy lights will turn on 10 seconds after CTM is notified that vehicle has stopped. This is dependent on battery power, intact wiring and an operating CTM.

ILLUMINATION

Ignition switch halo light and courtesy lights are controlled by CTM. High-line CTM also controls illuminated entry when RKE is used. If door is left open or dome light switch is left on, CTM will turn off interior lights after 15 minutes.

MECHANICAL INSTRUMENT CLUSTER

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

Powertrain Control Module (PCM) sends signals necessary for cluster to position gauges. Cluster receives these messages from CCD bus and translates them into gauge positions. CTM sends status of all indicator lights and dimming level to instrument cluster over CCD bus when ignition switch is in RUN or START position. Malfunction (CHECK ENGINE) indicator light status is sent to CTM from PCM over CCD bus. VFD odometer/trip display works when ignition switch is in RUN or START position. CTM stores mileage information that odometer displays. If CCD bus is not functioning, odometer will display dashes instead of mileage numbers. CTM sends mileage message and dimming level message to VFD when ignition is switch in ON position. All other instrument cluster features only work when ignition switch is in RUN position.

REMOTE KEYLESS ENTRY

Remote Keyless Entry (RKE) system works in conjunction with Vehicle Theft Security System (VTSS). RKE will store up to 4 key fob codes on models with VTSS and 2 key fob codes on models without VTSS. When lock/unlock button is pressed on RKE transmitter, RKE system tells VTSS to disarm.

SPEED SENSITIVE INTERMITTENT WIPERS

Speed sensitive intermittent wipers are controlled by CTM using intermittent wiper relay, and are included in high-line CTM only. At vehicle speeds of 10 MPH or less, delay time range is 1-36 seconds. At vehicle speeds more than 10 MPH, delay time is halfed. Speed information is supplied by PCM on CCD bus.

VEHICLE THEFT SECURITY SYSTEM

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

When an unauthorized entry into vehicle occurs, VTSS module signals Powertrain Control Module (PCM) via CCD bus that it is not okay to start engine. PCM then "zeros out" pulse width of fuel injectors, thus preventing engine from starting. Engine will NOT start until VTSS is disarmed.

Manual Override Mode & Tamper Alert Mode

VTSS will not arm if doors are locked using key or manual lock control (manual override mode). If horn sounds 3 times when either front door is unlocked, alarm was activated/triggered (tamper alert mode).

PROGRAMMING

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

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. Using scan tool, program all other options as necessary.

Compass Variance

Perform variance with vehicle headed within 45 degrees of directly north or south. Vehicle can be moving or stationary. Ensure compass/temperature is displayed. Turn ignition on. Press US/M and STEP buttons for more than 100 milliseconds, but not more than one second. Compass will display VAR and current variance. Within the next 5 seconds, momentarily depress and release US/M button. Variance zone will be set and normal operation will resume. If display flashes VAR twice before resuming normal operation, new variance was not accepted. Reposition vehicle toward north or south, and repeat procedure.

If new Mechanical Instrument Cluster (MIC) is installed, optional equipment indicators must be programmed. Activate or deactivate cruise-on indicator, overdrive off indicator, transmission oil temperature warning light and upshift indicator. Instrument cluster is programmed using scan tool. Follow scan tool directions.

POWERTRAIN CONTROL MODULE

Note. If Powertrain Control Module (PCM) is replaced, 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) module and Occupant Restraint Controller (ORC) module.

1. To program PCM and clear DTCs from ABS and SRS modules, connect scan tool to Data Link Connector (DLC). DLC is located below driver's side of instrument panel. Turn ignition on.
2. Using scan tool, enter correct VIN and mileage into PCM. Using scan tool manufacturer's instructions, clear DTCs from ABS and SRS modules.
3. Attempt to start vehicle. If vehicle starts and stays running, system is operating correctly and repair is complete. If vehicle does not start or stay running, repair by symptom. See appropriate TROUBLE SHOOTING - NO CODES article in ENGINE PERFORMANCE.

System will store up to 4 key fob codes. If a fob is lost or stolen, all codes can be erased. RKE system is programmed using scan tool. Follow scan tool directions.

REMOTE TRANSMITTER

Connect scan tool to Data Link Connector (DLC). Following scan tool manufacturer's instructions to program remote transmitter.

Initialization & Verification

An initialization procedure, included in VTSS, requires that vehicle record 20 engine cranking cycles before allowing VTSS module to function. For this reason, VTSS requires verification. To verify VTSS, perform the following: open driver's door (all others closed), remove ignition key, lock doors with power door lock switch and close driver's door. If VTSS SET light flashes, system is armed and operational. If VTSS SET light does not flash, 20 engine cranking cycles have not occurred or there is a problem with VTSS.

SYSTEM TESTS

Note. For connector terminal identification, see COMPONENT LOCATIONS . For wiring identification, see WIRING DIAGRAMS . Perform BODY VERIFICATION under VERIFICATION TESTS after each repair.

Chime Inoperative At All Times

Turn ignition on. Using scan tool, select BODY SYSTEM, BODY COMPUTER, then ACTUATORS. Actuate chime. If chime sounds, system is currently functioning correctly. If chime does not sound, replace Central Timer Module (CTM). CTM is located to right side of steering column, behind knee bolster.

Bus (+) &/Or Bus (-) Open

Note. Refer to WIRING DIAGRAMS for wire colors and terminal location.

1. Disconnect scan tool. Turn ignition on. Using DVOM, measure voltage between ground and CCD bus (+) circuit at DLC. If voltage is 1.8-2.3 volts, go to next step. If voltage is not 1.8-2.3 volts, go to step 3 .
2. Measure voltage between ground and CCD bus (-) DLC circuit. If voltage is not 1.8-2.3 volts, go to next step. If voltage is 1.8-2.3 volts, replace scan tool cable or scan tool.
3. Turn ignition off. Disconnect instrument cluster connector C1. Using DVOM, measure resistance between ground, CCD bus (-) and CCD bus (+). If resistance is more than 5 ohms, repair open in appropriate wire. If resistance is less than 5 ohms, replace instrument cluster. See ANALOG INSTRUMENT PANELS - RAM PICKUP article.

Bus (+) & Bus (-) Shorted Together

1. Turn ignition off. Disconnect Powertrain Control Module (PCM). PCM is mounted in right side of firewall. Turn ignition on. If scan tool displays BUS (+) & BUS (-) SHORTED TOGETHER, check scan tool and cable. If scan tool and cable are okay, go to next step for diesel or step 3 for gasoline. If scan tool does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace PCM. See «ENGINE CONTROL MODULE/POWERTRAIN CONTROL MODULE»(ref-34573-S28526183732001010900000) under REMOVAL & INSTALLATION.
2. Disconnect Engine Control Module (ECM). ECM is mounted on side of engine. Turn ignition on. If scan tool displays BUS (+) & BUS (-) SHORTED TOGETHER, go to next step. If scan tool does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace ECM. See «ENGINE CONTROL MODULE/POWERTRAIN CONTROL MODULE»(ref-34573-S28526183732001010900000) under REMOVAL & INSTALLATION.
3. Turn ignition off. Disconnect Controller Anti-Lock Brake (CAB) module. Controller is mounted to top of ABS hydraulic unit. Turn ignition on. If scan tool displays BUS (+) & BUS (-) SHORTED TOGETHER, go to next step. If scan tool does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace CAB module. See «CONTROLLER ANTI-LOCK BRAKE»(ref-34573-S27337435662001011200000) under REMOVAL & INSTALLATION.
4. Turn ignition off. Disconnect instrument cluster. Turn ignition on. If scan tool displays BUS (+) & BUS (-) SHORTED TOGETHER, go to next step. If scan tool does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace instrument cluster. See ANALOG INSTRUMENT PANELS - RAM PICKUP article.
5. Turn ignition off. Disconnect Compass/Mini-Trip Computer (CMTC). Turn ignition on. If scan tool displays BUS (+) & BUS (-) SHORTED TOGETHER, go to next step. If scan tool does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace CMTC.
6. Turn ignition off. Disconnect radio connector. Turn ignition on. If scan tool displays BUS (+) & BUS (-) SHORTED TOGETHER, go to next step. If scan tool does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace radio.
7. Turn ignition off and wait 2 minutes. Disconnect Air Bag Control Module (ACM). ACM is located under center of instrument panel. Turn ignition on. If scan tool displays BUS (+) & BUS (-) SHORTED TOGETHER, go to next step. If scan tool does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace ACM.
8. Turn ignition off. Disconnect Central Timer Module (CTM). CTM is located to right side of steering column, behind knee bolster. Turn ignition on. If scan tool displays BUS (+) & BUS (-) SHORTED TOGETHER, go to next step. If scan tool does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace CTM.
9. Disconnect scan tool from DLC. Using DVOM, measure resistance between CCD bus (+) at DLC connector and CCD bus (-) circuits. If resistance is less than 5 ohms, repair short between circuits. If resistance is more than 5 ohms, replace scan tool cable or scan tool as necessary.

Bus Bias Level Too Low/Too High

1. Disconnect scan tool. Turn ignition on. Using DVOM, measure voltage between ground and CCD bus (+) circuit at DLC. If voltage is 1.8-2.3 volts, repair/replace scan tool or scan tool cable. If voltage is not 1.8-2.3 volts, go to next step.
2. Turn ignition off. Disconnect PCM connector C3. Turn ignition on. Using scan tool, enter SYSTEMS MONITOR then CCD BUS TEST. If scan tool indicates BUS OPERATIONAL, replace PCM. If scan tool does not indicate BUS OPERATIONAL, go to next step.
3. Turn ignition off. Disconnect negative battery cable and wait 2 minutes before proceeding. Disconnect Air Bag Control Module (ACM). Reconnect negative cable Turn ignition on. Use scan tool to enter SYSTEMS MONITOR then CCD BUS TEST. If scan tool indicates BUS OPERATIONAL, replace ACM. If scan tool does not indicate BUS OPERATIONAL, go to next step.
4. Turn ignition off. Disconnect CTM connector C2. Turn ignition on. Use scan tool to enter SYSTEMS MONITOR then CCD BUS TEST. If scan tool indicates BUS OPERATIONAL, replace ACM. If scan tool does not indicate BUS OPERATIONAL, go to next step.
5. Turn ignition off. Disconnect CAB connector C1. Turn ignition on. Use scan tool to enter SYSTEMS MONITOR then CCD BUS TEST. If scan tool indicates BUS OPERATIONAL, replace CTM. If scan tool does not indicate BUS OPERATIONAL, go to next step.
6. Turn ignition off. Disconnect CMTC connector. If vehicle is not equipped with CMTC, go to next step. Turn ignition on. Use scan tool to enter SYSTEMS MONITOR then CCD BUS TEST. If scan tool indicates BUS OPERATIONAL, replace CMTC. If scan tool does not indicate BUS OPERATIONAL, go to next step.
7. Turn ignition off. Disconnect radio connector C3. If vehicle is not equipped with radio, go to next step. Turn ignition on. Use scan tool to enter SYSTEMS MONITOR then CCD BUS TEST. If scan tool indicates BUS OPERATIONAL, replace radio. If scan tool does not indicate BUS OPERATIONAL, go to next step.
8. Turn ignition off. Disconnect ECM connector. If vehicle is not equipped with diesel, go to next step. Turn ignition on. Use scan tool to enter SYSTEMS MONITOR then CCD BUS TEST. If scan tool indicates BUS OPERATIONAL, replace ECM. If scan tool does not indicate BUS OPERATIONAL, go to next step.
9. Turn ignition off. Disconnect instrument cluster connector C1. Ensure interior lights are off. Measure resistance between ground and instrument cluster ground circuits. If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, repair open in ground circuit.
10. Using DVOM, measure resistance between CCD bus (-) at DLC connector and CCD bus (-) at instrument cluster. If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, repair open White/Black wire.
11. Measure resistance between ground and instrument cluster CCD bus (-). If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, repair open White/Black wire.
12. Using DVOM, measure resistance between ground and instrument cluster CCD bus (+). If resistance is less than 1000 ohms, repair CCD bus (+) short to ground. If resistance is more than 1000 ohms, replace instrument cluster. See ANALOG INSTRUMENT PANELS - RAM PICKUP article.

No Bus Bias

1. Turn ignition on. Ensure fuse No. 17 (10-amp) is okay. Using DVOM, measure voltage between ground and CCD bus (+) circuit at Data Link Connector (DLC). If voltage is not 1.8-2.3 volts, go to step 3 . If voltage is 1.8-2.3 volts, go to next step.
2. Measure voltage between ground and CCD bus (-) circuit at DLC. If voltage is 1.8-2.3 volts, replace scan tool cable or scan tool. If voltage is not 1.8-2.3 volts, go to next step.
3. Turn ignition off. Disconnect instrument cluster connector C1. Turn ignition on. Using DVOM, measure voltage between ground and ignition feed circuit. Battery voltage should be present. If battery voltage is not present, check for open in ignition feed circuit. If battery voltage is present, go to next step.
4. Turn ignition off. Ensure interior lights are off. Measure resistance between ground and instrument cluster ground circuits. If resistance is more than 5 ohms, repair open in ground circuit. If resistance is less than 5 ohms, go to next step.
5. Using DVOM, measure resistance between CCD bus (+) circuit at DLC and instrument cluster CCD bus (+) circuit. If resistance is more than 5 ohms, repair open in CCD bus (+) circuit. If resistance is less than 5 ohms, go to next step.
6. Measure resistance between CCD bus (-) circuit at DLC and instrument cluster CCD bus (-) circuit. If resistance is more than 5 ohms, repair open in CCD bus (-) circuit. If resistance is less than 5 ohms, go to next step.
7. Measure resistance between ground and instrument cluster CCD bus (+) and CCD bus (-) circuits. If resistance is less than 1000 ohms, check for short to ground in CCD bus circuits. If resistance is more than 1000 ohms, replace instrument cluster. See ANALOG INSTRUMENT PANELS - RAM PICKUP article.

No Response Air Bag Control Module

1. Remove and inspect fuse(s) No. 18 and 19 (both 10-amp) from junction block located on left side of instrument panel and go to next step.
2. Disconnect ACM connector, located on transmission tunnel, below instrument panel. Using jumper wire, connect CCD bus (+) circuit to ground. Turn ignition on. Using scan tool enter SYSTEMS MONITOR then CCD BUS TEST. Scan tool should display SHORT TO GROUND. If scan tool does not display SHORT TO GROUND, repair open in Violet/Brown wire. If scan tool does display SHORT TO GROUND, go to next step.
3. Turn ignition off and wait 2 minutes. Disconnect jumper from CCD bus(+) circuit. Connect jumper wire to CCD bus(-) circuit. Turn ignition on. Using scan tool enter SYSTEMS MONITOR then CCD BUS TEST. Scan tool should display SHORT TO GROUND. If scan tool does not display SHORT TO GROUND, repair open in White/Black wire. If scan tool does display SHORT TO GROUND, replace ACM. See AIR BAG RESTRAINT SYSTEMS - TRUCKS article.

No Response Central Timer Module

1. Turn ignition off. Disconnect CTM connectors C1 and C2. Using DVOM, measure resistance between ground and CTM ground circuits. If resistance is more than 5 ohms, check for open or high resistance in ground circuit. If resistance is less than 5 ohms, go to next step.
2. Turn ignition on. Check for voltage between ground, ignition feed and battery feed circuits of CTM. If voltage is not present, repair open in appropriate wire. If voltage is present, go to next step.
3. Using scan tool, perform CCD bus test. Connect jumper wire between ground and CTM CCD bus (+) circuit. If scan tool displays BUS SHORT TO GROUND, go to next step. If scan tool does not display BUS SHORT TO GROUND, repair open in CCD bus(+) circuit.
4. Disconnect jumper wire. Connect jumper wire between ground and CTM CCD bus (-) circuit. If scan tool does not display BUS SHORT TO GROUND, repair open in CCD bus(-) circuit. If scan tool displays BUS SHORT TO GROUND, replace CTM. See «CENTRAL TIMER MODULE»(ref-34573-S37618349582001010900000) under REMOVAL & INSTALLATION.

No Response Compass/Mini-Trip System

1. Turn ignition off. Disconnect compass/mini-trip system connector. Using DVOM, measure resistance between ground and compass/mini-trip system ground circuits. If resistance is more than 5 ohms, check for open or high resistance in ground circuit. If resistance is less than 5 ohms, go to next step.
2. Turn ignition on. Check for voltage between ground and ignition feed and battery feed circuits of compass/mini-trip system. If voltage is not present, repair open in appropriate wire. If voltage is present, go to next step.
3. Using scan tool, perform CCD bus test. Connect jumper wire between ground and compass/mini-trip system CCD bus (+) circuit. If scan tool displays BUS SHORT TO GROUND, go to next step. If scan tool does not display BUS SHORT TO GROUND, repair open in CCD bus (+) circuit.
4. Disconnect jumper wire. Connect jumper wire between ground and compass/mini-trip system CCD bus (-) circuit. If scan tool does not display BUS SHORT TO GROUND, repair open in CCD bus (-) circuit. If scan tool displays BUS SHORT TO GROUND, replace compass/mini-trip system. See «COMPASS/MINI-TRIP COMPUTER»(ref-34573-S37363073162001010900000) under REMOVAL & INSTALLATION.

No Response Controller Anti-Lock Brake

1. Turn ignition on. Using scan tool, select SYSTEM TEST. If scan tool does not display PCM ACTIVE ON THE BUS, go to «NO RESPONSE ECM & PCM MODULE»(ref-34573-S30028116492001011100000) . If scan tool displays PCM ACTIVE ON THE BUS, go to next step.
2. Check fuses No. 3 and 11. If fuses are not okay, replace and repair wiring as necessary. If fuses are okay go to next step.
3. Turn ignition off. Disconnect Controller Anti-lock Brake (CAB) connector C1. Using DVOM, measure resistance between ground and CAB ground circuits. If resistance is more than 5 ohms, repair open or high resistance in ground circuits. If resistance is less than 5 ohms, go to next step.
4. Turn ignition on. Check for voltage between ground and ignition feed and battery feed circuits. if battery voltage is not present, repair open in appropriate circuit. If battery voltage is present, go to next step.
5. Using jumper wire, connect CCD bus (+) circuit from CAB connector to ground. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display SHORT TO GROUND, repair open in CCD bus (+) circuit. If scan tool displays SHORT TO GROUND, go to next step.
6. Using jumper wire, connect CCD bus (-) circuit from CAB connector to ground. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display SHORT TO GROUND, repair open in CCD bus (-) circuit. If scan tool displays SHORT TO GROUND, replace CAB. See «CONTROLLER ANTI-LOCK BRAKE»(ref-34573-S27337435662001011200000) under REMOVAL & INSTALLATION.

No Response ECM & PCM Module

1. Disconnect all Powertrain Control Module (PCM) connectors. Turn ignition on. Using scan tool, attempt to access ECM. If scan tool is able to access ECM, replace PCM. See «ENGINE CONTROL MODULE/POWERTRAIN CONTROL MODULE»(ref-34573-S28526183732001010900000) under REMOVAL & INSTALLATION. If scan tool is unable to access ECM, go to next step.
2. Turn ignition off. Disconnect scan tool. Disconnect all ECM connectors. Turn ignition on. Using DVOM, measure voltage of SCI Transmit circuit at DLC. If voltage is more than one volt, repair short to voltage in SCI transmit circuit. If voltage is less than one volt, go to next step.
3. Using DVOM, measure resistance between SCI transmit circuit and both SCI receive circuits at DLC. If resistance is less than 5 ohms, repair short between appropriate circuits. If resistance is more than 5 ohms, go to next step.
4. Measure resistance between ground and SCI receive circuit. If resistance is less than 5 ohms, repair short in SCI receive circuit. If resistance is more than 5 ohms, go to next step.
5. Measure resistance of SCI receive circuit between ECM connector and DLC. If resistance is more than 5 ohms, repair open in SCI receive circuit. If resistance is less than 5 ohms, go to next step.
6. Measure resistance of SCI transmit circuit between ECM connector and DLC. If resistance is more than 5 ohms, repair open in SCI transmit circuit. If resistance is less than 5 ohms, replace ECM (Diesel) or PCM (Gasoline). See «ENGINE CONTROL MODULE/POWERTRAIN CONTROL MODULE»(ref-34573-S28526183732001010900000) under REMOVAL & INSTALLATION.

No Response Instrument Cluster

1. Turn ignition on. Using scan tool, select CENTRAL TIMER MODULE. If scan tool displays NO RESPONSE, go to «NO RESPONSE CENTRAL TIMER MODULE»(ref-34573-S37028533692001010900000) . If scan tool does not display NO RESPONSE, go to next step.
2. Using scan tool, select 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, go to «NO RESPONSE ECM & PCM MODULE»(ref-34573-S30028116492001011100000) .
3. Remove and inspect fuse No. 17 (10-amp) from junction block, located on left side of instrument panel. If fuse is open, go to next step. If fuse is okay, go to step 5 .
4. Using DVOM, measure resistance between ground and ignition feed circuit. If resistance is less than 5 ohms, repair short in ground circuit. If resistance is more than 5 ohms, replace fuse. After repair, recheck system.
5. Turn ignition off. Disconnect instrument cluster connector C1. Turn ignition on. Using DVOM, measure resistance between ground and instrument cluster ground circuits. If resistance is more than 5 ohms, repair open or high resistance in ground circuits. If resistance is less than 5 ohms, go to next step.
6. Turn ignition on. Measure voltage between ground and battery feed and ignition feed circuits. If battery voltage is not present, repair open in appropriate feed circuit. If battery voltage is present, go to next step.
7. Using jumper wire, connect CCD bus (+) circuit from instrument cluster connector to ground. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display SHORT TO GROUND, repair open in CCD bus (+) circuit. If scan tool displays SHORT TO GROUND, go to next step.
8. Using jumper wire, connect CCD bus (-) circuit from instrument cluster connector to ground. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display SHORT TO GROUND, repair open in CCD bus (-) circuit. If scan tool displays SHORT TO GROUND, replace instrument cluster. See ANALOG INSTRUMENT PANELS - RAM PICKUP article.

No Response Radio

1. Turn ignition on. Using scan tool, select CENTRAL TIMER MODULE. If scan tool displays NO RESPONSE, go to «NO RESPONSE CENTRAL TIMER MODULE»(ref-34573-S37028533692001010900000) . If scan tool does not display NO RESPONSE, go to next step.
2. Using scan tool, select SYSTEM TEST. If scan tool does not display PCM ACTIVE ON THE BUS, go to «NO RESPONSE ECM & PCM MODULE»(ref-34573-S30028116492001011100000) . If scan tool displays PCM ACTIVE ON THE BUS, go to next step.
3. Remove radio. See «RADIO»(ref-34573-S11110025372001011200000) under REMOVAL & INSTALLATION. Disconnect radio connector. Turn ignition on. Using DVOM, check for voltage between ground and battery feed and ignition feed circuits. If voltage is not present, repair open in appropriate circuit. If voltage is present, go to next step.
4. Turn ignition off. Using jumper wire, connect CCD bus (+) circuit at radio connector to ground. Turn ignition on. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display SHORT TO GROUND, repair open in CCD bus (+) circuit. If scan tool displays SHORT TO GROUND, go to next step.
5. Turn ignition off. Using jumper wire, connect CCD bus (-) circuit at radio connector to ground. Turn ignition on. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display SHORT TO GROUND, repair open in CCD bus (-) circuit. If scan tool displays SHORT TO GROUND, replace radio.

No Termination

1. Turn ignition off. Disconnect PCM connector C3. Using jumper wire, connect CCD bus (+) circuit to ground. Turn ignition on. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display SHORT TO GROUND, repair open in CCD bus (+) circuit. If scan tool displays SHORT TO GROUND, go to next step.
2. Disconnect jumper from CCD bus (+). Using jumper wire, connect CCD bus (-) circuit to ground. Turn ignition on. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display SHORT TO GROUND, repair open in CCD bus (-) circuit. If scan tool displays SHORT TO GROUND, replace instrument cluster and PCM.

Not Receiving Bus Messages Correctly

1. Turn ignition off. Disconnect PCM connector C3. Turn ignition on. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool displays BUS OPERATIONAL, replace PCM. If scan tool does not display BUS OPERATIONAL, check scan tool cable and scan tool. If scan tool and cable are okay, go to next step.
2. Disconnect Controller Anti-Lock Brake (CAB) module. CAB module is mounted to top of ABS hydraulic unit. Turn ignition on. If scan tool displays BUS OPERATIONAL, replace CAB module. See «CONTROLLER ANTI-LOCK BRAKE»(ref-34573-S27337435662001011200000) under REMOVAL & INSTALLATION. If scan tool does not display BUS OPERATIONAL, go to next step.
3. Disconnect Compass/Mini-Trip Computer (CMTC). Turn ignition on. If scan tool displays BUS OPERATIONAL, replace CMTC. If scan tool does not display BUS OPERATIONAL, go to next step.
4. Disconnect 2-pin radio CCD busconnector. Turn ignition on. If scan tool displays BUS OPERATIONAL, replace radio. If scan tool does not display BUS OPERATIONAL, go to next step.
5. Turn ignition off and wait 2 minutes. Disconnect Air Bag Control Module (ACM). ACM is located under center of instrument panel. Turn ignition on. If scan tool displays BUS OPERATIONAL, replace ACM. If scan tool does not display BUS OPERATIONAL, go to next step.
6. Disconnect Central Timer Module (CTM). CTM is located to right side of steering column, behind knee bolster. Turn ignition on. If scan tool displays BUS OPERATIONAL, replace CTM. If scan tool does not display BUS OPERATIONAL, go to next step.
7. Disconnect Powertrain Control Module (PCM). PCM is mounted in right side of firewall. Turn ignition on. If scan tool displays BUS OPERATIONAL, replace PCM. If scan tool does not display BUS OPERATIONAL, replace instrument cluster. and recheck system.

Bus Short To 5 Volts

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector C3. Connect scan tool. Turn ignition on. If scan tool does not display BUS OPERATIONAL, go to step 3 . If scan tool displays BUS OPERATIONAL, check scan tool and cable. If scan tool and cable are okay, go to next step.
2. Turn ignition off. Using DVOM, measure resistance between CCD bus circuits and 5-volt supply circuits at PCM connectors. If resistance is less than 800 ohms, repair appropriate CCD bus circuit. If resistance is more than 800 ohms, replace PCM.
3. Turn ignition off. Disconnect Controller Anti-Lock Brake (CAB) module, located on top of ABS hydraulic unit. Turn ignition on. If scan tool displays BUS OPERATIONAL, replace CAB module. See «CONTROLLER ANTI-LOCK BRAKE»(ref-34573-S27337435662001011200000) under REMOVAL & INSTALLATION. If scan tool does not display BUS OPERATIONAL, go to next step.
4. Turn ignition off. Disconnect instrument cluster. Turn ignition on. If scan tool does not display BUS OPERATIONAL, go to next step. If scan tool displays BUS OPERATIONAL, replace instrument cluster. See ANALOG INSTRUMENT PANELS - RAM PICKUP article.
5. Turn ignition off. Disconnect Compass/Mini-Trip Computer (CMTC). Turn ignition on. If scan tool does not display BUS OPERATIONAL, go to next step. If scan tool displays BUS OPERATIONAL, replace CMTC.
6. Turn ignition off. Disconnect CCD busradio 2-pin connector. Turn ignition on. If scan tool does not display BUS OPERATIONAL, go to next step. If scan tool displays BUS OPERATIONAL, replace radio.
7. Turn ignition off, and wait at least 2 minutes. Disconnect Air Bag Control Module (ACM), located under center of instrument panel. Turn ignition on. If scan tool does not display BUS OPERATIONAL, go to next step. If scan tool displays BUS OPERATIONAL, replace ACM.
8. Turn ignition off. Disconnect Central Timer Module (CTM). CTM is mounted behind right corner of dash, beside glove box. Turn ignition on. If scan tool displays BUS OPERATIONAL, replace CTM. If scan tool does not display BUS OPERATIONAL, go to next step.
9. Turn ignition off. Ensure all modules are disconnected. Using DVOM, check for voltage between each CCD bus circuit at DLC and ground. If voltage is less than 4-volts, replace scan tool and recheck system. If voltage is more than 4 volts, repair short on appropriate CCD bus circuit.

Bus Short To Battery

1. Turn ignition off. Disconnect PCM. Turn ignition on. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display SHORT TO BATTERY, go to step 12 . If scan tool displays SHORT TO BATTERY, go to next step.
2. Turn ignition off. Disconnect negative battery cable and wait at least 2 minutes. Disconnect ACM connector. Reconnect battery. Turn ignition on. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display SHORT TO BATTERY, replace ACM. See «AIR BAG CONTROL MODULE»(ref-34573-S37820853762001011200000) under REMOVAL & INSTALLATION. If scan tool displays SHORT TO BATTERY, go to next step.
3. Turn ignition off. Disconnect instrument cluster connector C1. Turn ignition on. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display SHORT TO BATTERY, go to step 11 . If scan tool displays SHORT TO BATTERY, go to next step.
4. Turn ignition off. Disconnect CAB connector C1. Turn ignition on. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display SHORT TO BATTERY, replace CAB module. See «CONTROLLER ANTI-LOCK BRAKE»(ref-34573-S27337435662001011200000) under REMOVAL & INSTALLATION. If scan tool displays SHORT TO BATTERY, go to next step.
5. Turn ignition off. Disconnect CTM connectors. Turn ignition on. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display SHORT TO BATTERY, go to step 10 . If scan tool displays SHORT TO BATTERY, go to next step.
6. Turn ignition off. Disconnect CTMC connector. Turn ignition on. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display SHORT TO BATTERY, go to step 9 . If scan tool displays SHORT TO BATTERY, go to next step.
7. Turn ignition off. Disconnect radio connector. Turn ignition on. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display SHORT TO BATTERY, replace radio. See «RADIO»(ref-34573-S11110025372001011200000) under REMOVAL & INSTALLATION. If scan tool displays SHORT TO BATTERY, go to next step.
8. Turn ignition off. Ensure all modules are disconnected. Turn ignition on. Using DVOM, measure voltage between both CCD bus circuits and ground. If voltage is more than .5-volts, trace appropriate CCD bus circuit and repair short. If voltage is less than .5-volts, replace scan tool and recheck system.
9. Turn ignition off. Disconnect CMTC connector. Turn all lights off. Using DVOM, measure resistance between ground and CMTC ground circuits. If resistance is less than 5 ohms, replace CMTC. See «COMPASS/MINI-TRIP COMPUTER»(ref-34573-S37363073162001010900000) under REMOVAL & INSTALLATION. If resistance is more than 5 ohms, repair open or high resistance in ground circuit.
10. Turn ignition off. Disconnect CTM connector. Turn all lights off. Using DVOM, measure resistance between ground and CTM ground circuits. If resistance is less than 5 ohms, replace CTM. See «CENTRAL TIMER MODULE»(ref-34573-S37618349582001010900000) under REMOVAL & INSTALLATION. If resistance is more than 5 ohms, repair open or high resistance in ground circuit.
11. Turn ignition off. Disconnect instrument cluster connector C1. Using DVOM, measure resistance between ground and instrument cluster ground circuits. If resistance is less than 5 ohms, replace instrument cluster. See «INSTRUMENT CLUSTER»(ref-34573-S24552994882001010900000) under REMOVAL & INSTALLATION. If resistance is more than 5 ohms, repair open or high resistance in ground circuit.
12. Turn ignition off. Disconnect PCMconnector C1. Using DVOM, measure resistance between ground and PCM ground circuits. If resistance is less than 5 ohms, replace PCM. See «ENGINE CONTROL MODULE/POWERTRAIN CONTROL MODULE»(ref-34573-S28526183732001010900000) under REMOVAL & INSTALLATION. If resistance is more than 5 ohms, repair open or high resistance in ground circuit.

Bus Short To Ground

1. Turn ignition off. Disconnect scan tool. Using DVOM, measure resistance between ground and DLC ground circuits. If resistance is more than 5 ohms, repair open or high resistance in ground circuits. If resistance is less than 5 ohms, go to next step.
2. Turn ignition off. Disconnect ECM/PCM. Turn ignition on. If scan tool does not display BUS SHORT TO GROUND, replace ECM/PCM. See «ENGINE CONTROL MODULE/POWERTRAIN CONTROL MODULE»(ref-34573-S28526183732001010900000) under REMOVAL & INSTALLATION. If scan tool displays BUS SHORT TO GROUND, go to next step.
3. Turn ignition off. Disconnect Controller Anti-Lock Brake (CAB) module. CAB module is mounted to top of ABS hydraulic unit. Turn ignition on. If scan tool does not display BUS SHORT TO GROUND, replace CAB module. See «CONTROLLER ANTI-LOCK BRAKE»(ref-34573-S27337435662001011200000) under REMOVAL & INSTALLATION. If scan tool displays BUS SHORT TO GROUND, go to next step.
4. Turn ignition off. Disconnect instrument cluster. Turn ignition on. If scan tool does not display BUS SHORT TO GROUND, replace instrument cluster. See «INSTRUMENT CLUSTER»(ref-34573-S24552994882001010900000) under REMOVAL & INSTALLATION. If scan tool displays BUS SHORT TO GROUND, go to next step.
5. Turn ignition off. Disconnect Compass/Mini-Trip Computer (CMTC). Turn ignition on. If scan tool does not display BUS SHORT TO GROUND, replace CMTC. See «COMPASS/MINI-TRIP COMPUTER»(ref-34573-S37363073162001010900000) under REMOVAL & INSTALLATION. If scan tool displays BUS SHORT TO GROUND, go to next step.
6. Turn ignition off. Disconnect radio connector. Turn ignition on. If scan tool does not display BUS SHORT TO GROUND, replace radio. See «RADIO»(ref-34573-S11110025372001011200000) under REMOVAL & INSTALLATION. If scan tool displays BUS SHORT TO GROUND, go to next step.
7. Turn ignition off and wait 2 minutes. Disconnect Air Bag Control Module (ACM). Turn ignition on. If scan tool does not display BUS SHORT TO GROUND, replace ACM. See «AIR BAG CONTROL MODULE»(ref-34573-S37820853762001011200000) under REMOVAL & INSTALLATION. If scan tool displays BUS SHORT TO GROUND, go to next step.
8. Turn ignition off. Disconnect Central Timer Module (CTM). Turn ignition on. If scan tool does not display BUS SHORT TO GROUND, replace CTM. See «CENTRAL TIMER MODULE»(ref-34573-S37618349582001010900000) under REMOVAL & INSTALLATION. If scan tool displays BUS SHORT TO GROUND, go to next step.
9. Ensure all modules are disconnected from CCD bus. Disconnect scan tool from (DLC). Using DVOM, measure resistance between ground and CCD bus (+) at DLC. If resistance is less than 1000 ohms, repair CCD bus (+) circuit short to ground. If resistance is more than 1000 ohms, go to next step.
10. Measure resistance between ground and CCD bus (-) at DLC. If resistance is less than 1000 ohms, repair CCD bus (-) circuit to ground. If resistance is more than 1000 ohms, replace scan tool cable or scan tool as necessary and recheck system.

DOOR AJAR SYSTEM

Note. Testing is for CTM only. For connector terminal identification, see COMPONENT LOCATIONS . For wiring identification, see WIRING DIAGRAMS . Perform BODY VERIFICATION under VERIFICATION TESTS after each repair.

Left Door Ajar Circuit Open

1. Open driver's door. Connect scan tool to DLC. Turn ignition on. Select INPUT/OUTPUTS. Observe DRVR DOOR AJAR SW. If scan tool displays CLOSED, replace CTM. See «CENTRAL TIMER MODULE»(ref-34573-S37618349582001010900000) under REMOVAL & INSTALLATION. If scan tool does not display CLOSED, go to next step.
2. Disconnect driver's door switch. Using DVOM, connect positive lead to battery voltage and check ground circuit of switch. If battery voltage is not present, repair open or high resistance in ground circuit. If battery voltage is present, go to next step.
3. Using jumper wire, connect sensing circuit to ground circuit. Observe DRVR DOOR AJAR SW with scan tool. If scan tool does not display OPEN, replace driver's door switch. If scan tool displays OPEN, go to next step.
4. Disconnect CTM connector C1. Measure resistance of sensing circuit between CTM and driver's door switch. If resistance is less than 5 ohms, replace CTM. See «CENTRAL TIMER MODULE»(ref-34573-S37618349582001010900000) under REMOVAL & INSTALLATION. If resistance is more than 5 ohms, repair open or high resistance in sensing circuit.

Left Door Ajar Circuit Shorted

1. Close driver's door. Connect scan tool to DLC. Turn ignition on. Select INPUT/OUTPUTS. Observe DRVR DOOR AJAR SW. If scan tool displays OPEN, replace CTM. See «CENTRAL TIMER MODULE»(ref-34573-S37618349582001010900000) under REMOVAL & INSTALLATION. If scan tool does not display OPEN, go to next step.
2. Disconnect driver's door switch. If scan tool does not display CLOSED, replace driver's door switch. If scan tool displays CLOSED, go to next step.
3. Disconnect driver's door switch. Disconnect CTM connector C1. Using DVOM, connect positive lead to battery voltage and check sensing circuit. If battery voltage is not present, replace CTM. See «CENTRAL TIMER MODULE»(ref-34573-S37618349582001010900000) under REMOVAL & INSTALLATION. If battery voltage is present, repair short to ground in sensing circuit.

Right Door Ajar Circuit Open

1. Open passenger's door. Connect scan tool to DLC. Turn ignition on. Select INPUT/OUTPUTS. Observe PASS DOOR AJAR SW. If scan tool displays CLOSED, replace CTM. See «CENTRAL TIMER MODULE»(ref-34573-S37618349582001010900000) under REMOVAL & INSTALLATION. If scan tool does not display CLOSED, go to next step.
2. Disconnect passenger's door switch. Using DVOM, connect positive lead to battery voltage and check ground circuit of switch. If battery voltage is not present, repair open or high resistance in ground circuit. If battery voltage is present, go to next step.
3. Using jumper wire, connect sensing circuit to ground circuit. Observe PASS DOOR AJAR SW with scan tool. If scan tool does not display OPEN, replace passenger's door switch. If scan tool displays OPEN, go to next step.
4. Disconnect CTM connector C1. Measure resistance of sensing circuit between CTM and passenger's door switch. If resistance is less than 5 ohms, replace CTM. See «CENTRAL TIMER MODULE»(ref-34573-S37618349582001010900000) under REMOVAL & INSTALLATION. If resistance is more than 5 ohms, repair open or high resistance in sensing circuit.

Right Door Ajar Circuit Shorted

1. Close passenger's door. Connect scan tool to DLC. Turn ignition on. Select INPUT/OUTPUTS. Observe PASS DOOR AJAR SW. If scan tool displays OPEN, replace CTM. See «CENTRAL TIMER MODULE»(ref-34573-S37618349582001010900000) under REMOVAL & INSTALLATION. If scan tool does not display OPEN, go to next step.
2. Disconnect passenger's door switch. If scan tool does not display CLOSED, replace passenger's door switch. If scan tool displays CLOSED, go to next step.
3. Disconnect CTM connector C1. Using DVOM, connect positive lead to battery voltage and check sensing circuit. If battery voltage is not present, replace CTM. See «CENTRAL TIMER MODULE»(ref-34573-S37618349582001010900000) under REMOVAL & INSTALLATION. If battery voltage is present, repair short to ground in sensing circuit.

INSTRUMENT CLUSTER

Note. For connector terminal identification, see COMPONENT LOCATIONS . For wiring identification, see WIRING DIAGRAMS . Perform BODY VERIFICATION under VERIFICATION TESTS after each repair.

All Gauges Inoperative

1. Turn ignition on. Using scan tool, select ELECTRO/MECH CLUSTER. If scan tool displays BUS OPERATIONAL, go to next step. If scan tool does not display BUS OPERATIONAL, go to «COMMUNICATIONS»(ref-34573-S31633498492001010900000) and follow appropriate symptom diagnostics.
2. If scan tool displays NO RESPONSE, go to «NO RESPONSE INSTRUMENT CLUSTER»(ref-34573-S25257261302001010900000) under COMMUNICATIONS. If scan tool does not display NO RESPONSE, go to next step.
3. Using scan tool, select SYSTEM TEST. If scan tool displays PCM INACTIVE ON BUS, go to «NO RESPONSE ECM & PCM MODULE»(ref-34573-S30028116492001011100000) under COMMUNICATIONS. If scan tool does not display PCM INACTIVE ON BUS, go to next step.
4. Turn ignition off. Remove instrument cluster. See «INSTRUMENT CLUSTER»(ref-34573-S24552994882001010900000) under REMOVAL & INSTALLATION. Turn ignition on. Using DVOM, measure resistance between ground and instrument cluster ground circuits. If resistance is more than 5 ohms, repair open or high resistance in ground circuits. If resistance is less than 5 ohms go to next step.
5. Turn ignition off. Remove instrument cluster. See «INSTRUMENT CLUSTER»(ref-34573-S24552994882001010900000) under REMOVAL & INSTALLATION. Turn ignition on. Using DVOM, measure voltage between ground and instrument cluster ignition feed circuit. If battery voltage is not present, repair open in ignition feed circuit. If battery voltage is present, replace instrument cluster. See «INSTRUMENT CLUSTER»(ref-34573-S24552994882001010900000) under REMOVAL & INSTALLATION.

Any CCD Cluster Warning Light Or Indicator Inoperative

1. Turn ignition on. Using scan tool, select ELECTRO/MECH CLUSTER. If scan tool displays BUS OPERATIONAL, go to next step. If scan tool does not display BUS OPERATIONAL, go to «COMMUNICATIONS»(ref-34573-S31633498492001010900000) and follow appropriate symptom diagnostics.
2. If scan tool displays NO RESPONSE, go to «NO RESPONSE INSTRUMENT CLUSTER»(ref-34573-S25257261302001010900000) under COMMUNICATIONS. If scan tool does not display NO RESPONSE, go to next step.
3. Using scan tool, select SYSTEM TEST. If scan tool displays PCM INACTIVE ON BUS, go to «NO RESPONSE ECM & PCM MODULE»(ref-34573-S30028116492001011100000) under COMMUNICATIONS. If scan tool does not display PCM INACTIVE ON BUS, go to next step.
4. Turn ignition off. Push and hold RESET button while cycling ignition key. Release RESET button when CHEC appears in odometer display. Observe inoperative light during self-test. If inoperative light did not illuminate during self-test, go to next step. If inoperative light illuminated during self-test, verify if light is controlled by an input to instrument cluster. See «WIRING DIAGRAMS»(ref-34573-S42794653672001010900000) . If light is controlled by an input to instrument cluster, go to appropriate test. See «DIAGNOSTIC TROUBLE CODE IDENTIFICATION»(ref-34573-S18023964172001010900000) table under SELF-DIAGNOSTIC SYSTEM.
5. Remove instrument cluster. See «INSTRUMENT CLUSTER»(ref-34573-S24552994882001010900000) under REMOVAL & INSTALLATION. If defective light is a LED, replace instrument cluster. See «INSTRUMENT CLUSTER»(ref-34573-S24552994882001010900000) under REMOVAL & INSTALLATION. If defective light is a replaceable bulb, replace bulb.

Any Hard-Wired Cluster Warning Light Inoperative

1. Turn ignition off. Remove instrument cluster. See «INSTRUMENT CLUSTER»(ref-34573-S24552994882001010900000) under REMOVAL & INSTALLATION. Remove inoperative bulb. If bulb is burned out, replace bulb. If bulb is not burned out, go to next step.
2. Using DVOM, measure resistance between ground and ground circuits of instrument cluster. See «WIRING DIAGRAMS»(ref-34573-S42794653672001010900000) . If resistance is more than 5 ohms, repair open or high resistance in ground circuit. If resistance is less than 5 ohms go to next step.
3. Measure voltage between ground and battery feed and ignition feed circuits. If battery voltage is present, replace instrument cluster. See «INSTRUMENT CLUSTER»(ref-34573-S24552994882001010900000) under REMOVAL & INSTALLATION. If battery voltage is not present, repair open in appropriate feed circuit.

Instrument Cluster Dimming Inoperative

1. Ensure fuse No. 5 (5-amp) is not open. If fuse is open, repair wiring as necessary then replace fuse. If fuse is not open, turn parking lights on and set panel lights to brightest setting. Remove instrument cluster. See «INSTRUMENT CLUSTER»(ref-34573-S24552994882001010900000) under REMOVAL & INSTALLATION. Using DVOM, measure voltage between ground and panel lamps feed circuit. If battery voltage is not present, repair open in feed circuit. See «WIRING DIAGRAMS»(ref-34573-S42794653672001010900000) . If battery voltage is present, go to next step.
2. Measure resistance between ground and instrument cluster ground circuits. If resistance is more than 5 ohms, repair open or high resistance in ground circuit. If resistance is less than 5 ohms, go to next step.
3. Using DVOM, check suspect illumination bulb. If bulb is open, replace bulb and recheck system. If bulb is not open, replace instrument cluster. See «INSTRUMENT CLUSTER»(ref-34573-S24552994882001010900000) under REMOVAL & INSTALLATION.

One Gauge Not Operating Properly

1. Diagnose PCM and communication DTCs before continuing. Press and hold Trip/Reset button while cycling ignition on and off. When CHEC is displayed on odometer, release button and self-check will begin. Observe gauge readings. See «GAUGE SELF-TEST CALIBRATION POINTS»(ref-34573-S32483669882001010900000) table. If suspect gauge did not reach specified calibration point, replace instrument cluster. See «INSTRUMENT CLUSTER»(ref-34573-S24552994882001010900000) under REMOVAL & INSTALLATION. If suspect gauge reached specified calibration point, go to next step.
2. Check for TSBs related to incident. Inspect wiring harness connectors and terminals for corrosion and loose fit. Perform wiggle test on related wiring harness and connectors. If suspect gauge begins to operate normally, repair wiring as necessary. If suspect gauge does not begin to operate normally, replace instrument cluster.

GAUGE SELF-TEST CALIBRATION POINTS

Note. For connector terminal identification, see COMPONENT LOCATIONS . For wiring identification, see WIRING DIAGRAMS . Perform BODY VERIFICATION under VERIFICATION TESTS after each repair.

Average MPH/Fuel Econ Inoperative Or Wrong, CMTC Fails To Respond To Instrument Cluster Dimming, CMTC Display Shows Fail, Elapsed Time Inoperative/Wrong, Switch On CMTC Inoperative, Trip Odometer Inoperative/Wrong

Diagnose and repair PCM and Communication DTCs before continuing. If any listed symptoms exist, Compass/Mini-Trip Computer (CMTC) is defective. Replace CMTC.

CMTC Segments Fail To Light Up

Using scan tool, perform AUTO SELF TEST. If Compass/Mini-Trip Computer (CMTC) segments fail to illuminate, replace CMTC. If CMTC segments illuminate properly, system is currently functioning properly.

Compass/Mini-Trip Computer Inoperative

1. Ensure fuses No. 11 and 12 are okay. If fuse(s) are not okay, repair as necessary. If fuse(s) are okay, go to next step.
2. Disconnect Compass/Mini-Trip Computer (CMTC) connector. Using DVOM, measure voltage between ground and battery feed and ignition feed circuits. If battery voltage is not present, repair open in appropriate feed circuit. If battery voltage is present, go to next step.
3. Measure resistance between ground and CMTC ground circuits. If resistance is more than 5 ohms, repair open or high resistance in ground circuit. If resistance is less than 5 ohms, replace CMTC. See «COMPASS/MINI-TRIP COMPUTER»(ref-34573-S37363073162001010900000) under REMOVAL & INSTALLATION.

Distance To Empty Inoperative Or Wrong

Using scan tool, select COMPASS/MINI-TRIP then PROGRAM FUEL TANK SIZE. If current fuel tank size displayed on scan tool matches size of tank in vehicle, replace CTMC. If current fuel tank size does not match size of tank in vehicle, use scan tool to program correct tank size.

Incorrect Temp Reading Beyond +/- 5; Temp Reading Does Not Update After 3 Minutes Over 30 MPH

Disconnect ambient temperature sensor connector. Sensor is located on left radiator saddle. Turn ignition on. Observe Compass/Mini-Trip Computer (CMTC) display. If CMTC displays -40°F or -40°C, replace ambient temperature sensor. If CMTC does not display -40°F or -40°C, replace CMTC module.

Repairing -40°F Or -40°C In CMTC Display

1. Disconnect ambient temperature sensor, located on left radiator saddle. Connect jumper wire between sensor connector terminals. Turn ignition on. Observe Compass/Mini-Trip Computer (CMTC) display. If CMTC displays 131°F or 55°C, replace ambient temperature sensor. If CMTC does not display 131°F or 55°C, go to next step.
2. Turn ignition off. Disconnect jumper wire. Connect a jumper wire between ground and ambient temperature sensor signal circuit. Turn ignition on. If CMTC displays 131°F or 55°C, repair open ground circuit between ambient temperature sensor harness connector and CMTC. If CMTC does not display 131°F or 55°C, go to next step.
3. Leave CMTC connected. Using jumper wire, backprobe between ground and CMTC signal circuit. If CMTC displays 131°F or 55°C, repair open signal circuit between ambient temperature sensor harness connector and CMTC connector. If CMTC does not display 131°F or 55°C, replace CMTC module.

Repairing 131°F Or 55°C In CMTC Display

1. Disconnect ambient temperature sensor connector. Sensor is located on left radiator saddle. Turn ignition on. Observe Compass/Mini-Trip Computer (CMTC) display. If CMTC displays -40°F or -40°C, replace ambient temperature sensor. If CMTC does not display -40°F or -40°C, go to next step.
2. Turn ignition off. Disconnect Compass/Mini-Trip Computer (CMTC) connector. Using DVOM, measure resistance between CMTC signal circuit and ground. If resistance is less than 5 ohms, repair short to ground in signal circuit. If resistance is more than 5 ohms, go to next step.
3. Measure resistance between signal circuit and ambient temperature sensor ground circuits. If resistance is less than 1000 ohms, repair short between circuits. If resistance is more than 1000 ohms, replace CMTC module.

POWER DOOR LOCK SYSTEM

Note. For connector terminal identification, see COMPONENT LOCATIONS . For wiring identification, see WIRING DIAGRAMS . Perform BODY VERIFICATION under VERIFICATION TESTS after each repair.

Power Door Lock Switch Failure

1. Disconnect driver's door lock switch. Connect scan tool to DLC. Turn ignition on. Using scan tool, clear trouble codes as needed. Select POWER DOOR LOCK status. If scan tool does not display CLOSED, replace driver's door lock switch. If scan tool displays CLOSED, go to next step.
2. Disconnect passenger's door lock switch. Connect scan tool to DLC. Turn ignition on. Using scan tool, clear trouble codes as needed. Select POWER DOOR LOCK status. If scan tool does not display CLOSED, go to step 4 . If scan tool displays CLOSED, go to next step.
3. Disconnect CTM connectors. Measure voltage between passenger's door lock circuit and CTM connector. If voltage is present, repair short to voltage in passenger's door lock circuit. If voltage is not present, replace CTM.
4. Measure voltage between driver door lock circuit and CTM connector. If voltage is present, repair short to voltage in driver door lock circuit. If voltage is not present, replace passenger's door lock switch.

Power Door Unlock Switch Failure

1. Disconnect driver's door lock switch. Connect scan tool to DLC. Turn ignition on. Using scan tool, clear trouble codes as needed. Select POWER DOOR UNLOCK status. If scan tool does not display CLOSED, replace driver's door lock switch. If scan tool displays CLOSED, go to next step.
2. Disconnect passenger's door lock switch. Connect scan tool to DLC. Turn ignition on. Using scan tool, clear trouble codes as needed. Select POWER DOOR UNLOCK status. If scan tool does not display CLOSED, go to step 4 . If scan tool displays CLOSED, go to next step.
3. Disconnect CTM connectors. Measure voltage between passenger's door lock circuit and CTM connector. If voltage is present, repair short to voltage in passenger's door unlock circuit. If voltage is not present, replace CTM.
4. Measure voltage between driver door unlock circuit and CTM connector. If voltage is present, repair short to voltage in driver door unlock circuit. If voltage is not present, replace passenger's door lock switch.

Automatic (Rolling) Door Locks Inoperative

1. Ensure all doors are closed. Connect scan tool to DLC. Turn ignition on. Select BODY COMPUTER then INPUT/OUTPUT. If scan tool displays OPEN for any door ajar switch, go to «DOOR AJAR SYSTEM»(ref-34573-S15478411832001010900000) for short diagnosis. If scan tool does not display OPEN, go to next step.
2. Use scan tool to display engine DTCs. If scan tool displays any Throttle Position (TP) sensor or Vehicle Speed Sensor (VSS) DTCs, go to SELF-DIAGNOSTICS - RAM PICKUP article in ENGINE PERFORMANCE. If scan tool does not display any engine DTCs, go to next step.
3. Using scan tool, select BODY COMPUTER then MISCELLANEOUS. If scan tool does not display AUTO DOOR LOCKS: ENABLED, use scan tool to enable door locks and recheck system. If scan tool displays AUTO DOOR LOCKS: ENABLED, replace CTM.

Door Lock Inhibit Inoperative

1. Open driver's door. Connect scan tool to DLC. Turn ignition on. Select BODY COMPUTER then INPUT/OUTPUT. If scan tool does not display DR DOOR AJAR SW: CLOSED, go to «DOOR AJAR SYSTEM»(ref-34573-S15478411832001010900000) and diagnose by symptom. If scan tool displays DR DOOR AJAR SW: CLOSED, go to next step.
2. Ensure key is in ignition. If scan tool displays KEY IN IGN CHIME STATE: ON, replace CTM. If scan tool does not display KEY IN IGN CHIME STATE: ON, go to next step.
3. Turn ignition off. Disconnect ignition switch connector C2. Using jumper wire, connect key in ignition switch sense circuit to ground. (Scheme 15) Turn ignition on. Using scan tool, select BODY COMPUTER then INPUT/OUTPUT. Observe KEY IN IGN CHIME STATE status. If scan tool displays KEY IN IGN CHIME STATE: ON, replace ignition switch. If scan tool does not display KEY IN IGN CHIME STATE: ON, go to next step.
4. Turn ignition off. Ensure all lights are off. Disconnect ignition switch connector C2. Using DVOM, measure resistance between ground and ignition switch ground circuit in connector C2. If resistance is more than 5 ohms, repair open or high resistance in ground circuit. If resistance is less than 5 ohms, go to next step.
5. Disconnect CTM connector C2. Measure resistance of key in ignition switch sense circuit between ignition switch connector C2 and CTM connector C2. If resistance is more than 5 ohms, repair open or high resistance in sense circuit. If resistance is less than 5 ohms, replace CTM.

Scheme 15

Doors Fail To Lock & Unlock From Either Door Switch

1. Ensure fuse No. 13 is okay before continuing. Diagnose any PCM or BODY DTCs before continuing. Connect scan tool to DLC. Turn ignition on. Lower both front power windows. Using scan tool, actuate DOOR LOCK RLY then DOOR UNLOCK RLY. If door locks do not lock then unlock, go to step 5 . If door locks do lock then unlock, go to next step.
2. Disconnect passenger's door lock switch connector. Using DVOM, measure voltage between ground and battery feed circuit of passenger's door lock switch connector. If battery voltage is not present, repair open in feed circuit. If battery voltage is present, go to next step.
3. Reconnect passenger's door lock switch connector. Disconnect CTM connector C2. Measure voltage of passenger's door lock output circuit. Press passenger's door lock switch to LOCK then UNLOCK position. If battery voltage is present in both positions, replace CTM. If battery voltage is not present in both positions, go to next step.
4. Disconnect passenger's door lock switch connector. Measure resistance between passenger's door LOCK, UNLOCK circuits and CTM at connector C2. If resistance is less than 5 ohms on either circuit, replace passenger's door lock switch. If resistance is more than 5 ohms on either circuit, repair open or high resistance in appropriate circuit.
5. Disconnect CTM connector C2. Measure voltage between ground and battery feed circuit. If battery voltage is not present, repair open in feed circuit. If battery voltage is present, go to next step.
6. Using jumper wire, connect door lock driver circuit to ground. Then, momentarily, connect door unlock driver circuit to battery voltage. Reverse jumper wires to operate door lock motors in opposite direction. If doors LOCK then UNLOCK, replace CTM. If doors LOCK then UNLOCK, go to next step.
7. Measure resistance between door LOCK driver circuits, door UNLOCK driver circuits and CTM connector C2. If resistance is more than 5 ohms, repair open or high resistance in appropriate driver circuit. If resistance is less than 5 ohms, system is okay.

Doors Fail To Lock Or Unlock From One Switch Only

1. Disconnect passenger's door lock switch. While pressing driver's door lock and unlock switch, use DVOM to measure voltage between ground and driver door lock and unlock output circuits at passenger's door lock connector. If battery voltage is present, replace passenger's door lock switch. If battery voltage is not present, go to next step.
2. Disconnect driver's door lock connector. Measure resistance of driver's door lock and unlock circuit between passenger's door lock switch and driver door lock switch connectors. If resistance is more than 5 ohms, repair open or high resistance in appropriate circuit. If resistance is less than 5 ohms, replace driver's door lock switch.

Remote Keyless Entry Inoperative

1. Obtain all transmitters from customer and ensure each transmitter battery voltage is 3.2 volts. Turn ignition on. Place transmission in Park and disarm anti-theft system (if equipped). Using scan tool, select MISCELLANEOUS, then PROGRAM RKE. If BCM IS IN PROGRAMMING MODE does not appear, exit and select PROGRAM RKE again. Program mode will last for 30 seconds. Follow instructions on scan tool. When programming is finished, turn ignition off and remove key from ignition switch. Using reprogrammed transmitter(s) lock and unlock doors. If door locks operate properly, system has been repaired. If door locks do not operate properly, go to next step.
2. Using scan tool, reprogram a known-good transmitter. Operate door locks with reprogrammed transmitter. If doors locked properly, replace transmitter. If doors did not lock properly, replace CTM.

VEHICLE THEFT/SECURITY SYSTEM

Note. For connector terminal identification, see COMPONENT LOCATIONS . For wiring identification, see WIRING DIAGRAMS . Perform BODY VERIFICATION under VERIFICATION TESTS after each repair.

Alarm Trips On Its Own

Use scan tool to display ALARM TRIPPED BY status. If any codes are displayed, diagnose by symptom. See SYMPTOM INDENTIFICATION table under SELF-DIAGNOSTIC SYSTEM. If no codes are displayed, look for loose connections and chafed wiring harness.

Cylinder Lock Switch Failure

1. Using scan tool, select BODY, BODY CONTROL COMPUTER and SENSORS. Read CYLINDER LOCK SWITCH voltage with all lock switches in normal position. If voltage is 3.3 volts, go to next step. If voltage is more than 4.5 volts, go to step 3 . If voltage is less than 2.5 volts, go to step 9 .
2. Using scan tool, read CYLINDER LOCK SWITCH voltage while moving each lock switch to LOCK and UNLOCK positions. Lock voltage should be .46 volt. Unlock voltage should be one volt. If voltage is as specified, replace CTM. If voltage is not as specified, replace faulty switch.
3. Using scan tool, read CYLINDER LOCK SWITCH voltage while moving each lock switch to LOCK and UNLOCK positions. If one switch is inoperative, go to next step. If both switches are inoperative, go to step 8 .
4. Disconnect inoperative lock switch. Using jumper wire, connect harness connector terminals. Using scan tool, read CYLINDER LOCK SWITCH voltage. If voltage is displayed, go to next step. If zero voltage is displayed, replace inoperative cylinder lock switch.
5. Disconnect jumper wire. Using jumper wire, connect harness connector switch sense circuit to known-good ground. Using scan tool, read CYLINDER LOCK SWITCH voltage. If voltage is displayed, repair ground circuit. If zero voltage is displayed, go to next step.
6. Disconnect Central Timer Module (CTM) connector C2. CTM is located to right side of steering column, behind knee bolster. Measure resistance between cylinder lock switch sense circuit and ground. If resistance is more than 5 ohms, repair open or high resistance in sense circuit. If resistance is less than 5 ohms, go to next step.
7. Measure resistance between cylinder lock switch ground circuit and known-good ground. If resistance is more than 5 ohms, repair open or high resistance in sense circuit. If resistance is less than 5 ohms, replace CTM.
8. Disconnect both cylinder lock switch connectors. Disconnect CTM connector. Measure resistance of cylinder lock sense circuit between CTM harness connector and cylinder lock switches. If resistance is more than 5 ohms, repair open or high resistance in sense circuit. If resistance is less than 5 ohms, replace CTM.
9. Using scan tool, read CYLINDER LOCK SWITCH voltage while disconnecting each lock switch. If voltage does not change when switches are disconnected, go to next step. If voltage changes to more than 3 volts when a switch is disconnected, replace faulty cylinder lock switch.
10. Ensure both switches are disconnected. Disconnect Central Timer Module (CTM) connector C2. Using DVOM, measure resistance of cylinder lock switch sense circuit between ground and cylinder lock switch connector. If resistance is less than 5 ohms, repair short to ground in sense circuit. If resistance is more than 5 ohms, replace CTM.

Driver's Door Does Not Trip Alarm

Use scan tool to display DRVR DOOR AJAR SW status. Open driver's side door. If scan tool displays CLOSED, replace CTM. If scan tool does not display CLOSED, diagnose by symptom. See DOOR AJAR SYSTEM .

Headlights Fail To Flash When Alarm Is Tripped

1. Ensure headlights operate properly before continuing. Remove security relay from Power Distribution Center (PDC), located on left inner fenderwell. Using jumper wire, connect ground circuit of headlights, at security relay, to ground. If headlights do not turn on, replace PDC. If headlights do turn on, go to next step.
2. Install known-good relay. Arm and trip Vehicle Theft Security System (VTSS). If headlights flash, replace security relay. If headlights do not flash, go to next step.
3. Remove security relay. Using DVOM, measure voltage between ground and battery feed circuit. See «WIRING DIAGRAMS»(ref-34573-S42794653672001010900000) . If battery voltage is not present, repair open in feed circuit. If battery voltage is present, go to next step.
4. Measure voltage between battery voltage and ground circuit at security relay. If battery voltage is not present, repair open or high resistance in ground circuit. If battery voltage is present, go to next step.
5. Disconnect CTM. Measure voltage between ground and security relay control circuit. If battery voltage is present, repair control circuit for a short to voltage. If battery voltage is not present, go to next step.
6. Measure resistance between control circuit at CTM and security relay. If resistance is more than 5 ohms, repair open or high resistance in control circuit. If resistance is less than 5 ohms, replace CTM.

Horn Fails To Sound When Alarm Is Tripped

1. Push horn button on steering wheel. If horn does not sound, diagnose by symptom. See STEERING COLUMN SWITCHES - DAKOTA, DURANGO & RAM PICKUP article. If horn does sound, go to next step.
2. Disconnect CTM. Using jumper wire, connect horn relay control circuit to ground. If horn does not sound, repair open in horn control relay circuit. If horn does sound, replace CTM.

System Will Not Arm Or Disarm With Door Key

Connect scan tool to DLC. Turn ignition on. Observe CYLINDER LOCK SW voltage. Obtain a second key and rotate it from LOCK to UNLOCK position in each door lock cylinder.

Scan tool should display .5 volt in lock position, one volt in unlock position and 3.3 volts in neutral position. If voltage displayed is as specified, replace CTM. If voltage displayed is not as specified, check suspect door lock cylinder switch circuit for open, short to ground or short to voltage.

Passenger's Door Does Not Trip VTSS

Using scan tool observe PASS DOOR AJAR SW. Open passenger's door. If scan tool displays CLOSED, replace CTM. If scan tool does not display CLOSED, go to RIGHT DOOR AJAR CIRCUIT OPEN under DOOR AJAR SYSTEM.

VTSS Indicator Inoperative

1. Disconnect Compass/Mini-Trip Computer (CMTC) connector. Connect scan tool to DLC. Turn ignition on. Select VEHICLE THEFT and turn on VTSS indicator lamp. Using DVOM, measure voltage between ground and CMTC drive circuit. If battery voltage is present, replace CMTC. If battery voltage is not present, go to next step.
2. Turn ignition off. Disconnect CTM. measure resistance of VTSS indicator driver circuit between CMTC connector and CTM connector. If resistance is more than 5 ohms, repair open or high resistance in VTSS indicator driver circuit. If resistance is less than 5 ohms, replace CTM.

VTSS Will Not Arm

1. Connect scan tool to DLC. Turn ignition on. Using scan tool, ensure THEFT ALARM is enabled. If VTSS was not enabled, use scan tool to enable VTSS. If VTSS was enabled, go to next step.
2. Ensure all doors are closed, headlights are off and key is not in ignition switch. Using scan tool, read active DTCs, KEY IN IGNITION, HEADLAMP and DOOR AJAR SWITCH states. If any arming inhibitors are present, go to «SYMPTOM IDENTIFICATION»(ref-34573-S42161417312001011700000) table under SELF-DIAGNOSTIC SYSTEM. If arming inhibitors are not present, replace CTM.

WINDSHIELD WIPER SYSTEM

Note. For connector terminal identification, see COMPONENT LOCATIONS . For wiring identification, see WIRING DIAGRAMS . Perform BODY VERIFICATION under VERIFICATION TESTS after each repair.

Wiper Park Switch Failure

1. Using scan tool, clear DTCs. Operate wipers in low speed, then intermittent mode for at least 20 seconds. Reread DTCs. If WIPER PARK SWITCH FAILURE is not displayed, check related connectors for proper fit and wiring harness for chafes or pinches. If WIPER PARK SWITCH FAILURE is displayed, go to next step.
2. Turn wipers off. Turn ignition off. Ensure wipers are in park position. Disconnect wiper motor connector. Turn ignition on. Using DVOM, measure voltage between ground and wiper motor Park sense circuit at wiper connector. If voltage is less than .5 volt, replace wiper motor. If voltage is more than .5 volt, go to next step.
3. Disconnect CTM connector C1. Measure voltage between ground and wiper park sense circuit at CTM connector C1. If voltage is not present, replace CTM. If voltage is present, repair short to voltage in sense circuit between CTM and wiper relay or wiper motor.

Intermittent Wipers Inoperative

1. Turn ignition on. Inspect fuse No. 6 (25-amp) and repair as necessary. Turn wiper multifunction switch to low or high speed for about 20 seconds then turn off. If wipers do not Park properly, go to «Wipers Fail To Park»(ref-34573-S26535559412001011700000) . If wipers do park properly, go to next step.
2. Remove wiper relay, located in Power Distribution Center (PDC). Turn ignition on. Using DVOM, measure voltage between both ignition switch feed circuits and ground. If battery voltage is not present, repair open in ignition switch feed circuit. If battery voltage is present, go to next step.
3. Install a known-good relay. Operate wipers in all intermittent delay positions. If wipers operate properly, replace wiper relay. If wipers do not operate properly, go to next step.
4. Turn ignition off. Disconnect CTM connector C1. Measure resistance between wiper mode sense circuit and wiper mode signal circuit while turning wiper multifunction switch through all intermittent modes. Resistance should change smoothly from 5 ohms to 3000 ohms. If resistance is not as specified, go to step 9 . If resistance is as specified, go to next step.
5. Remove wiper relay. Turn ignition on. Rotate wiper multifunction switch to inoperative intermittent position. Using test light, connect wiper relay ignition switch feed circuit to wiper motor relay control circuit. Test light should illuminate consistently within one minute. If test light does not illuminate as specified, go to step 8 . If test light does illuminate as specified, go to next step.
6. Turn ignition off. Disconnect multifunction switch connector. Using DVOM measure resistance between wiper motor low speed driver circuits. If resistance is more than one ohm, repair open between wiper motor low speed driver circuits. If resistance is less than one ohm, go to next step.
7. Measure resistance between low speed wiper switch output circuits at multifunction switch. If resistance is more than one ohm, repair open or high resistance in low speed wiper switch output circuits. If resistance is less than one ohm, replace multifunction switch. See STEERING COLUMN SWITCHES - DAKOTA, DURANGO & RAM PICKUP article.
8. Turn ignition off. Disconnect CTM connector C1. Using jumper wire, connect wiper motor relay control circuit to ground. Using DVOM, measure resistance between wiper motor relay control circuit and ground. If resistance is more than 5 ohms, repair open or high resistance in wiper motor relay control circuit. If resistance is less than 5 ohms, replace CTM.
9. Disconnect multifunction switch. Using DVOM, measure resistance of wiper switch mode signal circuit between CTM connector C1 and multifunction switch connector. If resistance is more than 5 ohms, repair open or high resistance in wiper mode signal circuit. If resistance is less than 5 ohms, go to next step.
10. Measure resistance of wiper switch mode sense circuit between CTM connector C1 and multifunction switch connector. If resistance is more than 5 ohms, repair open or high resistance in wiper switch mode sense circuit. If resistance is less than 5 ohms, replace multifunction switch.

No Wiper Actuation After Wash Button Pushed

1. Turn ignition on. If washer system works, go to next step. If washer system does not work, see appropriate WIPER/WASHER SYSTEMS article.
2. Using scan tool, actuate washer. If washer pump sense displays on and washer does not actuate, replace CTM. If washer pump sense does not display on, repair open in washer switch sense circuit.

Wiper Speed Sensitive Feature Inoperative

1. Raise and support vehicle. Turn wipers on to lowest intermittent position. Time interval between wipes. Spin rear wheels to more than 15 MPH. Time interval between wipes. If interval between wipes decreased, system is currently functioning properly. If interval between wipes did not decrease, go to next step.
2. Spin rear wheels to more than 15 MPH. Using scan tool, select WIPER SYSTEM MONITOR. If monitored speed matches speedometer reading, replace CTM. If monitored speed does not match speedometer reading, diagnose by symptom. See «INSTRUMENT CLUSTER»(ref-34573-S23425635272001010900000) .

Wipers Fail To Park

1. Connect scan tool to DLC. Turn ignition on. Turn wiper switch to low speed. Using scan tool, select INPUTS/OUTPUTS and monitor WIPER PK SW state for 30 seconds. If WIPER PK SW does not toggle between open and closed, go to step 4 . If WIPER PK SW toggles between open and closed, go to next step.
2. Turn wiper switch off. Turn ignition off. Install known-good wiper relay in Power Distribution Center (PDC). Turn ignition on. Turn wiper switch to low speed for about 20 seconds then turn wiper switch off. If wipers park properly, replace wiper relay. If wipers do not park properly, go to next step.
3. Turn ignition off. Disconnect multifunction switch connector. Remove wiper relay. Using jumper wire, connect low speed wiper motor driver circuit at relay connector in PDC to ground. Using DVOM, measure resistance between low speed wiper motor driver circuit and ground. If resistance is more than 5 ohms, repair open or high resistance in low speed wiper motor driver circuit. If resistance is less than 5 ohms, replace multifunction switch.
4. Remove wiper relay from PDC. Turn ignition on. Connect test light to wiper park switch sense circuit at relay connector. Turn wiper switch to low position. Test light should illuminate on-off when wiper motor rotates. If test does not illuminate as specified, go to step 6 . If test light does illuminate as specified, go to next step.
5. Disconnect jumper wire. Turn ignition off. Disconnect CTM connector C1. Using jumper wire, connect wiper park switch sense circuit in relay connector to ground. Using DVOM, measure resistance between ground and wiper park switch sense circuit at CTM connector C1. If resistance is more than 5 ohms, repair open or high resistance in wiper park switch sense circuit. If resistance is less than 5 ohms, replace CTM.
6. Turn ignition off. Disconnect wiper motor. Measure resistance of wiper park switch sense circuit between wiper motor connector and wiper relay connector. If resistance is more than 5 ohms, repair open or high resistance in wiper park switch sense circuit. If resistance is less than 5 ohms, go to next step.
7. Disconnect jumper wire. Turn ignition on. Measure voltage between ignition switch feed circuit and ground. If battery voltage is not present, repair open in feed circuit. If battery voltage is present, replace wiper motor.

AIR BAG SYSTEM VERIFICATION

1. Remove all jumper wires. Reconnect all components, except battery. Turn ignition on. Reconnect battery.
2. Turn ignition off. Connect scan tool to Data Link Connector (DLC), located under instrument panel. Turn ignition on. Using scan tool, clear DTCs.
3. Turn ignition off. After 15 seconds, turn ignition on. Wait one minute. Using scan tool, check air bag system DTCs with passenger's air bag switch in on and off positions. If fault messages exist, see appropriate MITCHELL® AIR BAG SERVICE & REPAIR MANUAL, DOMESTIC & IMPORTED MODELS. If fault messages do not exist, repair is complete.

BODY VERIFICATION

1. Remove all jumper wires. Reconnect all previously disconnected connectors. Turn ignition on, engine off. Using scan tool, erase all fault messages. Turn ignition off. Wait 10 seconds. Turn ignition on, engine off. Operate system that is malfunctioning. If system does not operate properly, go to «SELF-DIAGNOSTIC SYSTEM»(ref-34573-S06869457432001010900000) . If system operates properly, go to next step.
2. Using scan tool, read fault messages. If fault messages exist, go to «SELF-DIAGNOSTIC SYSTEM»(ref-34573-S06869457432001010900000) . If fault messages do not exist, repair is complete.

Note. Before removing Central Timer Module (CTM), use scan tool to view settings for programmable features. Use these settings to program replacement CTM.

ENGINE CONTROL MODULE/POWERTRAIN CONTROL MODULE

Note. If Powertrain Control Module (PCM) was replaced, the correct vehicle mileage and Vehicle Identification Number (VIN) must be programmed into the PCM to prevent DTCs from being set in Controller Anti-Lock Brake (CAB) and Occupant Restraint Controller (ORC) modules. To program PCM, see POWERTRAIN CONTROL MODULE under PROGRAMMING.