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Body Control Modules: Other Jeep Cherokee III

Body, Cab Control Systems 11 illustrations ~13050 words

CHRYSLER COLLISION DETECTION BUS SYSTEM

Chrysler Collision Detection (CCD) bus is a pair of twisted wires traveling from module-to-module between 5 modules receiving and delivering coded information. These modules are Air Bag Control Module (ACM), Compass/Mini-Trip Computer (CMTC), instrument cluster, Remote Keyless Entry (RKE) module and Sentry Key Immobilizer Module (SKIM). Powertrain Control Module (PCM) and Transmission Control Module (TCM) are not part of body control system, but use CCD bus to communicate.

Coded information identifies message and its importance. When multiple messages attempt to access CCD bus at once, code assigns priority ranking.

CCD bus system uses 2 twisted wires and 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 that 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. CMTC will display information for compass direction, outside temperature, elapsed time, distance to empty, average fuel economy, instantaneous fuel economy and trip odometer. CMTC module is self-calibrated and requires no adjustment. Remote Keyless Entry (RKE) module is part of overhead console but can be serviced as a separate unit. CMTC can perform an independent self-test. This can be done using either DRB or pressing both US/M and STEP buttons simultaneously, and turning ignition switch to ON position. All segments of CMTC should illuminate while CMTC checks for internal function. If any internal failures are present, CMTC will display FAIL. If a problem with Chrysler Collision Detection (CCD) communication is present, CMTC will display CCD.

INSTRUMENT CLUSTER

Instrument cluster includes a speedometer, tachometer, fuel gauge, oil pressure gauge, water temperature gauge, voltmeter and a series of warning lights.

Powertrain Control Module (PCM) sends signals necessary for instrument cluster to position gauges. Instrument cluster receives these messages from Chrysler Collision Detection (CCD) bus and translates them into gauge positions. Body Control Module (BCM) sends status of some indicator lights and dimming level to instrument cluster over CCD bus when ignition switch is in ON or START positions. Other indicator lights are hard-wired directly to system being monitored. Malfunction Indicator Light (MIL) status is sent to BCM from PCM over CCD bus. All other instrument cluster features only work when ignition switch is in ON position. Vehicle chime function and rear window defogger timer are part of instrument cluster circuit board.

Vacuum Florescent (VF) odometer/trip display works when ignition switch is in ON or START positions. BCM stores mileage information for odometer display. If CCD bus is not functioning, odometer will display dashes instead of mileage. BCM sends mileage message and dimming level message to vacuum fluorescent display when ignition switch is in ON position. PCM Diagnostic Trouble Codes (DTC) can be accessed using VF display by turning ignition switch from OFF to ON position 3 times.

Instrument cluster indicator lights controlled by CCD bus are as follows.

  1. Air Bag
  2. Cruise Control
  3. Low Fuel Warning
  4. Low Washer Fluid
  5. Upshift (M/T Only)
  6. Seat Belt
  7. Sentry Key Immobilizer
  8. Engine Temperature
  9. Battery Charge (If Equipped)
  10. Low Oil Pressure Warning (If Equipped)
  11. Check Gauges

Instrument cluster indicator lights hard-wired to monitored system are as follow

  1. Brake
  2. Full Time 4WD
  3. Part Time 4WD
  4. High Beam
  5. Left Turn Signal
  6. Right Turn Signal
  7. Liftgate Ajar
  8. ABS (Amber Light)
  9. Malfunction Indicator Light (MIL)
  10. SKIM

REMOTE KEYLESS ENTRY

On vehicles equipped with Compass/Mini-Trip Computer (CMTC), Remote Keyless Entry (RKE) module is located in rear of overhead console. On vehicles not equipped with CMTC, RKE module is part of mini-dome light. See COMPONENT LOCATIONS . On all vehicles, when RKE module receives a valid signal from RKE transmitter, it will send a signal on bus to lock or unlock doors. When unlock button on remote keyless entry transmitter is pressed, doors will unlock and illuminated entry will turn on. Remote keyless entry transmitter uses radio frequency signals to communicate with RKE module.

POWERTRAIN CONTROL MODULE/SENTRY KEY IMMOBILIZER MODULE

Note. If Powertrain Control Module (PCM) has been replaced and correct Vehicle Identification Number (VIN) and mileage have not be entered into new PCM, Diagnostic Trouble Codes (DTC) will set in Anti-Lock Brake System (ABS), Air Bag Control Module (ACM) and Sentry Key Immobilizer Module (SKIM). Secret key data must be updated prior to starting vehicle.

  1. Connect scan tool to Data Link Connector (DLC). see scheme 1 For Anti-Lock Brake System (ABS) and air bag systems, enter correct VIN and current mileage into new Powertrain Control Module (PCM). Use scan tool to erase ABS and ACM DTCs.
  2. For Sentry Key Immobilizer Module (SKIM), connect scan tool and select THEFT ALARM, SKIM then MISCELLANEOUS. Place SKIM in secured access mode by using 4-digit Personal Identification Number (PIN). This number can be obtained from vehicle invoice or calling Chrysler customer center. Select UPDATE SECRET KEY DATA. SKIM data will automatically be transferred to PCM.
  3. Attempt to start engine. If engine starts and runs, programming is complete. If engine is unable to start, verify that programming procedure has been completed and check for related Technical Service Bulletins (TSB).

Note. Remote Keyless Entry (RKE) system has customer programmable chirp feature. This will enable activation of vehicle horn when vehicle is locked using RKE transmitter.

  1. Ensure Remote Keyless Entry (RKE) transmitter is within operating range. Press and hold lock button on transmitter for 5-10 seconds.
  2. While holding lock button, press and release unlock button. This will enable or disable chirp function of RKE system. To verify operation, lock vehicle using RKE transmitter. If horn does not operate as desired, repeat procedure.

Transmitter

Connect scan tool and follow on-screen instructions. Select THEFT ALARM, MISCELLANEOUS, then PROGRAMMING RKE. Select a position between 1 and 4. Power locks will cycle to indicate programming mode has been entered. Press unlock button on transmitter. Power locks will cycle again to indicate programming of that transmitter has been completed. Transmitters will go out of synchronization when batteries are dead or replaced, or if any button is pressed more than 128 times with transmitter out of operating range. To resynchronize transmitter, ensure transmitter is within operating range of vehicle and press and hold lock button until door locks cycle.

Programming Blank Sentry Keys Using Customer Learn Method

Note. This procedure is to program additional sentry keys (up to 8) beyond existing 2 sentry keys. At least 2 sentry keys programmed to current module must be available for programming of additional keys. If 2 sentry keys are not available, perform PROGRAMMING BLANK SENTRY KEY USING SCAN TOOL .

Perform this procedure for each new blank sentry key.

  1. Insert first valid sentry key into ignition lock cylinder and turn ignition switch to ON position for a minimum of 3 seconds but not longer than 15 seconds.
  2. Turn ignition switch to OFF position and remove first valid sentry key from ignition lock cylinder.
  3. Within 15 seconds of removing first valid sentry key, insert second valid sentry key into ignition lock cylinder and turn ignition switch to ON position.
  4. When sentry key indicator on instrument cluster begins to flash and a single chime is heard (about 10 seconds after turning ignition on), turn ignition switch to OFF position and remove second valid ignition key.
  5. Within 60 seconds of removing second valid sentry key, insert blank sentry key into ignition lock cylinder and turn ignition switch to ON position. Sentry key indicator on instrument cluster will continue to flash and a single chime will be heard (about 10 seconds after turning ignition on). Sentry key indicator will stop flashing. Sentry key indicator will then turn on and off once. Blank sentry key is now programmed.

Initialization Procedure

  1. Obtain vehicle unique Personal Identification Number (PIN) number assigned to original SKIM from vehicle invoice or calling Chrysler customer center.
  2. Using scan tool, select THEFT ALARM, SKIM, then MISCELLANEOUS. Select SKIM MODULE REPLACED function.
  3. Enter SECURED ACCESS mode using unique 4-digit PIN. This number can be obtained from vehicle invoice or calling Chrysler Customer Center.
  4. Program vehicle VIN number into SKIM memory.
  5. Program country code into SKIM memory (U.S.).
  6. Transfer vehicle unique secret key data from PCM. This process will require SKIM module to be in SECURED ACCESS mode. PIN must be entered into scan tool before SKIM will enter SECURED ACCESS mode. Once SECURED ACCESS mode is active, SKIM will remain in that mode for 60 seconds.
  7. Program all customer keys into SKIM memory. This requires that SKIM be in SECURED ACCESS mode. SKIM will immediately exit SECURED ACCESS mode after each key is programmed.

SYSTEM TESTS

WARNINGDO NOT reconnect battery before turning ignition switch to ON position and ensuring no one is in vehicle. Air bag may deploy.

Note. Disconnect battery and wait 2 minutes before disconnecting air bag control module. If air bag control module is dropped, it must be replaced.

Bus (+) & Bus (-) Shorted Together

  1. Turn ignition switch to OFF position. Disconnect Powertrain Control Module (PCM) harness connector C3. See «COMPONENT LOCATIONS»(ref-91240-S10554460982001030600000). Turn ignition switch to ON position. Using scan tool, select SYSTEM MONITORS, then CCD BUS TEST. If scan tool displays BUS (+) & BUS (-) SHORTED TOGETHER, go to next step. If scan tool does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace PCM. See «POWERTRAIN CONTROL MODULE»(ref-91240-S28898862992001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  2. Turn ignition switch to OFF position. Disconnect instrument cluster harness connector. Turn ignition switch to ON position. 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 INSTRUMENT PANELS - CHEROKEE article. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  3. Turn ignition switch to OFF position. Disconnect Transmission Control Module (TCM) harness connector, if equipped. see scheme 4 Turn ignition switch to ON position. If scan tool displays BUS (+) & BUS (-) SHORTED TOGETHER, go to next step. If scan tool does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace TCM. See «TRANSMISSION CONTROL MODULE»(ref-91240-S11517013252001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  4. Turn ignition switch to OFF position. Disconnect Compass/Mini-Trip Computer (CMTC) harness connector, if equipped. Turn ignition switch to ON position. If scan tool displays BUS (+) & BUS (-) SHORTED TOGETHER, go to next step. If scan tool does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace CMTC. See «COMPASS/MINI-TRIP COMPUTER»(ref-91240-S38914682602001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  5. Turn ignition switch to OFF position. Disconnect Remote Keyless Entry (RKE) module harness connector, if equipped. Turn ignition switch to ON position. If scan tool displays BUS (+) & BUS (-) SHORTED TOGETHER, go to next step. If scan tool does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace RKE module. See «REMOTE KEYLESS ENTRY MODULE»(ref-91240-S08064593242001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  6. Turn ignition switch to OFF position. Disconnect Sentry Key Immobilizer Module (SKIM) harness connector. see scheme 5 Turn ignition switch to ON position. If scan tool displays BUS (+) & BUS (-) SHORTED TOGETHER, go to next step. If scan tool does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace SKIM. See «SENTRY KEY IMMOBILIZER MODULE»(ref-91240-S20499079592001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  7. Turn ignition switch to OFF position. Disconnect negative battery cable and wait 2 minutes. Disconnect Air Bag Control Module (ACM) harness connector. See «COMPONENT LOCATIONS»(ref-91240-S10554460982001030600000). Connect negative battery cable. Turn ignition switch to ON position. If scan tool displays BUS (+) & BUS (-) SHORTED TOGETHER, go to next step. If scan tool does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace ACM. See «AIR BAG CONTROL MODULE»(ref-91240-S29159333592001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  8. Turn ignition switch to OFF position. Disconnect scan tool from Data Link Connector (DLC). Measure resistance between terminals No. 3 (Violet/Brown wire) and No. 11 (White/Black wire) at DLC. (Scheme 9) If resistance is less than 100 ohms, repair short between Violet/Brown wire and/or White/Black wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If resistance is 100 ohms or greater, repair or replace scan tool cable or scan tool as necessary. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

Scheme 9

Scheme 9
Scheme 9

Bus Bias Level Too High

  1. Disconnect scan tool. Turn ignition switch to ON position. Measure voltage between ground and terminals No. 3 (Violet/Brown wire) and No. 11 (White/Black wire) at Data Link Connector (DLC). (Scheme 9) If both voltages are 1.8-2.8 volts, repair or replace scan tool cable or scan tool as necessary. If either voltage is not 1.8-2.8 volts, go to next step.
  2. Turn ignition switch to OFF position. Disconnect PCM harness connector C3. Turn ignition switch to ON position. Connect scan tool to DLC. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool display BUS OPERATIONAL, replace PCM. See «POWERTRAIN CONTROL MODULE»(ref-91240-S28898862992001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If scan tool does not display BUS OPERATIONAL, go to next step.
  3. Turn ignition switch to OFF position. Disconnect negative battery cable and wait 2 minutes. Disconnect ACM harness connector. Connect negative battery cable. Connect scan tool to DLC. Turn ignition switch to ON position. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool displays BUS OPERATIONAL, replace ACM. See «AIR BAG CONTROL MODULE»(ref-91240-S29159333592001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If scan tool does not display BUS OPERATIONAL, go to next step.
  4. Turn ignition switch to OFF position. Disconnect Sentry Key Immobilizer Module (SKIM) harness connector. see scheme 5 Turn ignition switch to ON position. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display BUS OPERATIONAL, go to next step. If scan tool displays BUS OPERATIONAL, replace SKIM. See «SENTRY KEY IMMOBILIZER MODULE»(ref-91240-S20499079592001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  5. Turn ignition switch to OFF position. Disconnect Remote Keyless Entry (RKE) module harness connector, if equipped. Turn ignition switch to ON position. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display BUS OPERATIONAL, go to next step. If scan tool displays BUS OPERATIONAL, replace RKE module. See «REMOTE KEYLESS ENTRY MODULE»(ref-91240-S08064593242001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  6. Turn ignition switch to OFF position. Disconnect Compass/Mini-Trip Computer (CMTC) harness connector, if equipped. Turn ignition switch to ON position. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display BUS OPERATIONAL, go to next step. If scan tool displays BUS OPERATIONAL, replace CMTC. See «COMPASS/MINI-TRIP COMPUTER»(ref-91240-S38914682602001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  7. Turn ignition switch to OFF position. Disconnect Transmission Control Module (TCM) harness connector, if equipped. see scheme 4 Turn ignition switch to ON position. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display BUS OPERATIONAL, go to next step. If scan tool displays BUS OPERATIONAL, replace TCM. See «TRANSMISSION CONTROL MODULE»(ref-91240-S11517013252001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  8. Turn ignition switch to OFF position. Remove instrument cluster. Disconnect instrument cluster harness connector C1. Ensure interior lights are off. Disconnect scan tool from DLC. Measure resistance between ground and terminal No. 6 (Black/Light Green wire) at instrument cluster connector C1. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in Black/Light Green wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  9. Disconnect instrument cluster harness connector C2. Measure resistance of White/Black wire between terminal No. 1 at instrument cluster harness connector C2 and terminal No. 11 at DLC. (Scheme 9)and (Scheme 10). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in White/Black wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  10. Measure resistance of Violet/Brown wire between terminal No. 2 at instrument cluster harness connector C2 and terminal No. 3 at DLC. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in Violet/Brown wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  11. Disconnect negative battery cable. Ensure instrument cluster is still removed. Measure resistance between ground and terminal No. 1 (White/Black wire) at instrument cluster harness connector C2. If resistance is less than 1000 ohms, repair short to ground in White/Black wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If resistance is 1000 ohms or greater, go to next step.
  12. Measure resistance between ground and terminal No. 2 (Violet/Brown wire) at instrument cluster harness connector C2. If resistance is less than 1000 ohms, repair short to ground in Violet/Brown wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If resistance is 1000 ohms or greater, replace instrument cluster. See INSTRUMENT PANELS - CHEROKEE article. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

Scheme 10

Scheme 10
Scheme 10

Bus Bias Level Too Low

  1. Disconnect scan tool. Turn ignition switch to ON position. Measure voltage between ground and terminals No. 3 (Violet/Brown wire) and No. 11 (White/Black wire) at Data Link Connector (DLC). (Scheme 9) If both voltages are 1.8-2.8 volts, repair or replace scan tool cable or scan tool as necessary. If either voltage is not 1.8-2.8 volts, go to next step.
  2. Turn ignition switch to OFF position. Disconnect PCM harness connector C3. Turn ignition switch to ON position. Connect scan tool to DLC. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool display BUS OPERATIONAL, replace PCM. See «POWERTRAIN CONTROL MODULE»(ref-91240-S28898862992001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If scan tool does not display BUS OPERATIONAL, go to next step.
  3. Turn ignition switch to OFF position. Disconnect negative battery cable and wait 2 minutes. Disconnect ACM harness connector. Connect negative battery cable. Connect scan tool to DLC. Turn ignition switch to ON position. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool displays BUS OPERATIONAL, replace ACM. See «AIR BAG CONTROL MODULE»(ref-91240-S29159333592001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If scan tool does not display BUS OPERATIONAL, go to next step.
  4. Turn ignition switch to OFF position. Disconnect Sentry Key Immobilizer Module (SKIM) harness connector. see scheme 5 Turn ignition switch to ON position. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display BUS OPERATIONAL, go to next step. If scan tool displays BUS OPERATIONAL, replace SKIM. See «SENTRY KEY IMMOBILIZER MODULE»(ref-91240-S20499079592001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  5. Turn ignition switch to OFF position. Disconnect Remote Keyless Entry (RKE) module harness connector, if equipped. Turn ignition switch to ON position. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display BUS OPERATIONAL, go to next step. If scan tool displays BUS OPERATIONAL, replace RKE module. See «REMOTE KEYLESS ENTRY MODULE»(ref-91240-S08064593242001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  6. Turn ignition switch to OFF position. Disconnect Compass/Mini-Trip Computer (CMTC) harness connector, if equipped. Turn ignition switch to ON position. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display BUS OPERATIONAL, go to next step. If scan tool displays BUS OPERATIONAL, replace CMTC. See «COMPASS/MINI-TRIP COMPUTER»(ref-91240-S38914682602001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  7. Turn ignition switch to OFF position. Disconnect Transmission Control Module (TCM) harness connector, if equipped. see scheme 4 Turn ignition switch to ON position. Using scan tool, select SYSTEM MONITORS then CCD BUS TEST. If scan tool does not display BUS OPERATIONAL, go to next step. If scan tool displays BUS OPERATIONAL, replace TCM. See «TRANSMISSION CONTROL MODULE»(ref-91240-S11517013252001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  8. Turn ignition switch to OFF position. Remove instrument cluster. Disconnect instrument cluster harness connector C1. Ensure interior lights are off. Disconnect scan tool from DLC. Measure resistance between ground and terminal No. 6 (Black/Light Green wire) at instrument cluster connector C1. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in Black/Light Green wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  9. Disconnect instrument cluster harness connector C2. Measure resistance of White/Black wire between terminal No. 1 at instrument cluster harness connector C2 and terminal No. 11 at DLC. (Scheme 9)and (Scheme 10). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in White/Black wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  10. Measure resistance of Violet/Brown wire between terminal No. 2 at instrument cluster harness connector C2 and terminal No. 3 at DLC. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in Violet/Brown wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  11. Disconnect negative battery cable. Ensure instrument cluster is still removed. Measure resistance between ground and terminal No. 1 (White/Black wire) at instrument cluster harness connector C2. If resistance is less than 1000 ohms, repair short to ground in White/Black wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If resistance is 1000 ohms or greater, go to next step.
  12. Measure resistance between ground and terminal No. 2 (Violet/Brown wire) at instrument cluster harness connector C2. If resistance is less than 1000 ohms, repair short to ground in Violet/Brown wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If resistance is 1000 ohms or greater, replace instrument cluster. See INSTRUMENT PANELS - CHEROKEE article. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

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

  1. Turn ignition switch to On position. Measure voltage between ground and terminal No. 3 (Violet/Brown wire) and No. 11 (White/Black wire) at Data Link Connector (DLC). (Scheme 9) If both voltages are 1.8-2.8 volts, repair or replace scan tool cable or scan tool as necessary. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If either voltage is not 1.8-2.8 volts, go to next step.
  2. Turn ignition switch to OFF position. Remove instrument cluster. Disconnect instrument cluster harness connector C2. Measure resistance of Violet/Brown wire between terminal No. 2 at instrument cluster harness connector C2 and terminal No. 3 at DLC. (Scheme 9)and (Scheme 10). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in Violet/Brown wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  3. Measure resistance of White/Black wire between terminal No. 1 at instrument cluster harness connector C2 and terminal No. 11 at DLC. If resistance is less than 5 ohms, replace instrument cluster. See INSTRUMENT PANELS - CHEROKEE article. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If resistance is 5 ohms or greater, repair open in White/Black wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

Short To 5 Volts Failure

  1. Turn ignition switch to OFF position. Disconnect Powertrain Control Module (PCM) harness connector C3. See «COMPONENT LOCATIONS»(ref-91240-S10554460982001030600000). Turn ignition switch to ON position. Using scan tool, select SYSTEM MONITORS, then CCD BUS TEST. If scan tool displays BUS OPERATIONAL, go to next step. If scan tool does not display BUS OPERATIONAL, go to step 4.
  2. Turn ignition switch to OFF position. Disconnect all PCM harness connectors. Measure resistance between terminal No. 30 (Violet/Brown wire) at PCM harness connector C3 and terminal No. 17 (Orange wire) at PCM harness connector C1. Measure resistance between terminal No. 30 (Violet/Brown wire) at PCM harness connector C3 and terminal No. 31 (Orange wire) at PCM harness connector C2. (Scheme 11) If any resistance is less than 800 ohms, repair short between appropriate wire(s). Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If all resistances are 800 ohms or greater, go to next step.
  3. Measure resistance between terminal No. 28 (White/Black wire) at PCM harness connector C3 and terminal No. 17 (Orange wire) at PCM harness connector C1. Measure resistance between terminal No. 28 (White/Black wire) at PCM harness connector C3 and terminal No. 31 (Orange wire) at PCM harness connector C2. If any resistance is less than 800 ohms, repair short between appropriate wire(s). If all resistances are 800 ohms or greater, replace PCM. See «POWERTRAIN CONTROL MODULE»(ref-91240-S28898862992001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  4. Disconnect following module harness connectors one at a time and check for short to 5 volts using scan tool: Transmission Control Module (TCM), instrument cluster, Compass/Mini-Trip Computer (CMTC), Remote Keyless Entry (RKE), Sentry Key Immobilizer Module (SKIM), then Air Bag Control Module (ACM). Turn ignition switch to OFF position. Disconnect negative battery cable and wait 2 minutes. Disconnect next module harness connector. Connect negative battery cable. Turn ignition switch to ON position. If scan tool displays SHORT TO 5 VOLTS for any module, go to next step. If scan tool does not display SHORT TO 5 VOLTS for all modules, go to step 7.
  5. Turn ignition switch to OFF position. Disconnect module harness connector when bus failure message was eliminated. Measure resistance between Violet/Brown wire terminal at suspect module harness connector and Orange wire terminal at suspect harness connector. If resistance is less than 100 ohms, repair short between Violet/Brown wire and 5 volt supply circuit. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If resistance is 100 ohms or greater, go to next step.
  6. Measure resistance between White/Black wire terminal at suspect harness connector and Orange wire terminal at suspect harness connector. If resistance is less than 100 ohms, repair short between White/Black wire and 5 volt supply circuit. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If resistance is 100 ohms or greater, replace module or component that caused bus failure message. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  7. Ensure all modules are still disconnected. Turn ignition switch to ON position. Measure voltage between ground and terminal No. 3 (Violet/Brown wire) at DLC. (Scheme 9) If voltage is less than 4 volts, go to next step. If voltage is 4 volts or greater, repair short to voltage in Violet/Brown wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  8. Measure voltage between ground and terminal No. 11 (White/Black wire) at DLC. If voltage is 4 volts or greater, repair short to voltage in White/Black wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If voltage is less than 4 volts, repair or replace scan tool cable or scan tool as necessary. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

Scheme 11

Scheme 11
Scheme 11

Short To Battery Failure

  1. Turn ignition switch to OFF position. Disconnect Powertrain Control Module (PCM) connector C3. See «COMPONENT LOCATIONS»(ref-91240-S10554460982001030600000). Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO BATTERY, go to next step. If scan tool does not display SHORT TO BATTERY, go to step 16.
  2. Turn ignition switch to OFF position. Disconnect negative battery cable and wait 2 minutes. Disconnect Air Bag Control Module (ACM). Connect negative battery cable. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO BATTERY, go to next step. If scan tool does not display SHORT TO BATTERY, replace ACM. See «AIR BAG CONTROL MODULE»(ref-91240-S29159333592001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  3. Turn ignition switch to OFF position. Disconnect instrument cluster harness connector C2. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO BATTERY, go to next step. If scan tool does not display SHORT TO BATTERY, go to step 15.
  4. Turn ignition switch to OFF position. Disconnect Sentry Key Immobilizer Module (SKIM) harness connector. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO BATTERY, go to next step. If scan tool does not display SHORT TO BATTERY, go to step 13.
  5. Turn ignition switch to OFF position. Disconnect Remote Keyless Entry (RKE) module harness connector, if equipped. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO BATTERY, go to next step. If scan tool does not display SHORT TO BATTERY, go to step 11.
  6. Turn ignition switch to OFF position. Disconnect Compass/Mini-Trip Computer (CMTC) harness connector, if equipped. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO BATTERY, go to next step. If scan tool does not display SHORT TO BATTERY, go to step 10.
  7. Turn ignition switch to OFF position. Disconnect Transmission Control Module (TCM) harness connector, if equipped. see scheme 4 Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO BATTERY, go to next step. If scan tool does not display SHORT TO BATTERY, replace TCM. See «TRANSMISSION CONTROL MODULE»(ref-91240-S11517013252001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  8. Turn ignition switch to OFF position. Ensure all modules harness connectors are still disconnected. Disconnect scan tool from Data Link Connector (DLC). Check for poor connections between scan tool and DLC. Measure voltage between ground and terminal No. 3 (Violet/Brown wire) at DLC. (Scheme 9) If voltage is less than 0.5 volt, go to next step. If voltage is 0.5 volt or greater, repair short to voltage in Violet/Brown wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  9. Measure voltage between ground and terminal No. 11 (White/Black wire) at DLC. If voltage is 0.5 volt or greater, repair short to voltage in White/Black wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If voltage is less than 0.5 volt, replace scan tool cable or scan tool as necessary. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  10. Turn ignition switch to OFF position. Measure resistance between ground and terminal No. 12 (Black/Light Green wire) at CMTC harness connector. (Scheme 12) If resistance is less than 5 ohms, replace CMTC. See «COMPASS/MINI-TRIP COMPUTER»(ref-91240-S38914682602001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If resistance is greater than 5 ohms, repair open in Black/Light Green wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  11. Turn ignition switch to OFF position. Measure resistance between ground and terminal No. 3 (Black wire) at RKE module harness connector. (Scheme 13) If resistance is less than 5 ohms, go to next step. If resistance is greater than 5 ohms, repair open in Black wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  12. Measure resistance between ground and terminal No. 9 (Black wire) at RKE module harness connector. If resistance is less than 5 ohms, replace RKE module. See «REMOTE KEYLESS ENTRY MODULE»(ref-91240-S08064593242001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If resistance is greater than 5 ohms, repair open in Black wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  13. Turn ignition switch to OFF position. Disconnect SKIM harness connector. Turn all lights off. Measure resistance between ground and terminal No. 3 (Black/Light Green wire) at SKIM harness connector. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in Black/Light Green wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  14. Measure resistance between ground and terminal No. 5 (Black/Light Green wire) at SKIM harness connector. (Scheme 14) If resistance is less than 5 ohms, replace SKIM. See «SENTRY KEY IMMOBILIZER MODULE»(ref-91240-S20499079592001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If resistance is 5 ohms or greater, repair open in Black/Light Green wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  15. Turn ignition switch to OFF position. Disconnect instrument cluster harness connector C1. Measure resistance between ground and terminal No. 6 (Black/Light Green wire) at instrument cluster harness connector C1. (Scheme 10) If resistance is less than 5 ohms, replace instrument cluster. See INSTRUMENT PANELS - CHEROKEE article. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If resistance is greater than 5 ohms, repair open in Black/Light Green wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  16. Turn ignition switch to OFF position. Disconnect PCM harness connector C1. Measure resistance between ground and terminal No. 31 (Black/Tan wire) at PCM harness connector C1. (Scheme 11) If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in Black/Tan wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  17. Measure resistance between ground and terminal No. 32 (Black/Tan wire) at PCM harness connector C1. If resistance is less than 5 ohms, replace PCM. See «POWERTRAIN CONTROL MODULE»(ref-91240-S28898862992001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If resistance is 5 ohms or greater, repair open in Black/Tan wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

Scheme 12

Scheme 12
Scheme 12

Scheme 13

Scheme 13
Scheme 13

Scheme 14

Scheme 14
Scheme 14

Short To Ground Failure

  1. Turn ignition switch to OFF position. Disconnect scan tool from Data Link Connector (DLC). Measure resistance between ground and terminal No. 5 (Black/Tan wire) at DLC. (Scheme 9) If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in Black/Tan wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  2. Disconnect Powertrain Control Module (PCM) harness connector C3. See «COMPONENT LOCATIONS»(ref-91240-S10554460982001030600000). Connect scan tool to DLC. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, go to next step. If scan tool does not display SHORT TO GROUND, replace PCM. See «POWERTRAIN CONTROL MODULE»(ref-91240-S28898862992001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  3. Turn ignition switch to OFF position. Disconnect negative battery cable and wait 2 minutes. Disconnect Air Bag Control Module (ACM) harness connector. ACM is located under center console. Connect negative battery cable. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, go to next step. If scan tool does not display SHORT TO GROUND, replace ACM. See «AIR BAG CONTROL MODULE»(ref-91240-S29159333592001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  4. Turn ignition switch to OFF position. Disconnect instrument cluster harness connector C2. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, go to next step. If scan tool does not display, SHORT TO GROUND, replace instrument cluster. See INSTRUMENT PANELS - CHEROKEE article. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  5. Turn ignition switch to OFF position. Disconnect Sentry Key Immobilizer Module (SKIM) harness connector. see scheme 5 Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, go to next step. If scan tool does not display SHORT TO GROUND, replace SKIM. See «SENTRY KEY IMMOBILIZER MODULE»(ref-91240-S20499079592001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  6. Turn ignition switch to OFF position. Disconnect Remote Keyless Entry (RKE) module harness connector, if equipped. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, go to next step. If scan tool does not display SHORT TO GROUND, replace RKE module. See «REMOTE KEYLESS ENTRY MODULE»(ref-91240-S08064593242001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  7. Turn ignition switch to OFF position. Disconnect Compass/Mini-Trip Computer (CMTC) harness connector, if equipped. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, go to next step. If scan tool does not display SHORT TO GROUND, replace CMTC. See «COMPASS/MINI-TRIP COMPUTER»(ref-91240-S38914682602001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  8. Turn ignition switch to OFF position. Disconnect Transmission Control Module (TCM) harness connector, if equipped. see scheme 4 Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS, then CCD BUS TEST. If scan tool displays SHORT TO GROUND, go to next step. If scan tool does not display SHORT TO GROUND, replace TCM. See «TRANSMISSION CONTROL MODULE»(ref-91240-S11517013252001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  9. Turn ignition switch to OFF position. Ensure all module harness connectors are still disconnected. Disconnect scan tool from DLC. Measure resistance between ground and terminal No. 3 (Violet/Brown wire) at DLC. (Scheme 9) If resistance is 1000 ohms or greater, go to next step. If resistance is less than 1000 ohms, repair short to ground in Violet/Brown wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  10. Measure resistance between ground and terminal No. 11 (White/Black wire) at DLC. If resistance is 1000 ohms or greater, repair or replace scan tool cable or scan tool as necessary. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If resistance is less than 1000 ohms, repair short to ground in White/Black wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

No Bus Bias Failure

  1. Turn ignition switch to OFF position. Disconnect scan tool from Data Link Connector (DLC). Turn ignition switch to ON position. Measure voltage between ground and terminals No. 3 (Violet/Brown wire) and No. 11 (White/Black wire) at DLC. If either voltage is not 1.8-2.8 volts, go to next step. If both voltages are 1.8-2.8 volts, repair or replace scan tool or scan tool cable as necessary. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  2. Turn ignition switch to OFF position. Remove and inspect fuse No. 9 (10-amp) from junction block. See «COMPONENT LOCATIONS»(ref-91240-S10554460982001030600000). If fuse is blown, inspect circuit for short to ground. See POWER DISTRIBUTION article in WIRING DIAGRAMS. If fuse is not blown, go to next step
  3. Turn ignition switch to OFF position. Remove instrument cluster. Disconnect instrument cluster harness connector C1. Install fuse No. 9. Turn ignition switch to ON position. Measure voltage between ground and terminal No. 8 (White/Black wire) at instrument cluster harness connector C1. (Scheme 10) If voltage is 10 volts or less, repair open in White/Black wire between instrument cluster and junction block. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If voltage is greater than 10 volts, replace instrument cluster. See INSTRUMENT PANELS - CHEROKEE article. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

No Response From Air Bag Control Module

WARNINGDO NOT reconnect battery before turning ignition switch to ON position and ensuring no one is in vehicle. Air bag may deploy.

Note. Disconnect battery and wait 2 minutes before disconnecting Air Bag Control Module (ACM). If ACM is dropped, it must be replaced.

  1. Turn ignition switch to OFF position. Disconnect negative battery cable and wait 2 minutes. Disconnect Air Bag Control Module (ACM) harness connector. Measure resistance between ground and terminal No. 10 (Black/Pink wire) at ACM harness connector. (Scheme 15) If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in Black/Pink wire. Perform «AIR BAG VERIFICATION TEST»(ref-91240-S00651347552001030900000) under VERIFICATION TESTS.
  2. Using a jumper wire, ground terminal No. 19 (Violet/Brown wire) at ACM harness connector. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, go to next step. If scan tool does not display SHORT TO GROUND, repair open in Violet/Brown wire. Perform «AIR BAG VERIFICATION TEST»(ref-91240-S00651347552001030900000) under VERIFICATION TEST.
  3. Using a jumper wire, ground terminal No. 18 (White/Black wire) at ACM harness connector. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, replace ACM. See «AIR BAG CONTROL MODULE»(ref-91240-S29159333592001030600000) under REMOVAL & INSTALLATION. Perform «AIR BAG VERIFICATION TEST»(ref-91240-S00651347552001030900000) under VERIFICATION TESTS. If scan tool does not display SHORT TO GROUND, repair open in White/Black wire. Perform «AIR BAG VERIFICATION TEST»(ref-91240-S00651347552001030900000) under VERIFICATION TESTS.

Scheme 15

Scheme 15
Scheme 15

No Response From Compass/Mini-Trip Computer

  1. Turn ignition switch to OFF position. Disconnect Compass/Mini-Trip Computer (CMTC) harness connector, if equipped. Turn ignition switch to ON position. Measure voltage between ground and terminal No. 6 (White/Black wire) at CMTC harness connector. (Scheme 12) If voltage is 10 volts or greater, go to next step. If voltage is less than 10 volts, repair open in White/Black wire between CMTC and junction block. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  2. Turn ignition switch to OFF position. Using a jumper wire, ground terminal No. 11 (White/Black wire) at CMTC harness connector. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, go to next step. If scan tool displays SHORT TO GROUND, repair open in White/Black wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  3. Turn ignition switch to OFF position. Using a jumper wire, ground terminal No. 5 (Violet/Brown wire) at CMTC harness connector. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, replace CMTC. See «COMPASS/MINI-TRIP COMPUTER»(ref-91240-S38914682602001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If scan tool displays SHORT TO GROUND, repair open in Violet/Brown wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

No Response From Instrument Cluster

  1. Turn ignition switch to OFF position. Disconnect instrument cluster harness connector C2. Measure resistance between ground and terminal No. 9 (Black/Light Green wire) at instrument cluster harness connector C2. (Scheme 10) If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in Black/Light Green wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  2. Turn ignition switch to OFF position. Disconnect instrument cluster harness connector C2. Using a jumper, ground terminal No. 2 (Violet/Brown wire) at instrument cluster harness connector C2. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, go to next step. If scan tool does not display, SHORT TO GROUND, repair open in Violet/Brown wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  3. Using a jumper wire, ground terminal No. 1 (White/Black wire) at instrument cluster harness connector C2. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, replace instrument cluster. See INSTRUMENT PANELS - CHEROKEE article. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If scan tool does not display SHORT TO GROUND, repair open in White/Black wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

No Response From Powertrain Control Module

Note. Attempt to start engine. If engine does not start, repair no start condition. See NO-START DIAGNOSIS in BASIC DIAGNOSTIC PROCEDURES article in ENGINE PERFORMANCE.

  1. Connect scan tool to a different vehicle. Turn ignition switch to ON position. If scan tool communicates with vehicle, go to next step. If scan tool does not communicate with vehicle, repair or replace scan tool or scan tool cable as necessary. Perform «POWERTRAIN CONTROL MODULE VER-1»(ref-91240-S28898862992001030600000) under VERIFICATION TESTS.
  2. Check Powertrain Control Module (PCM) power and ground circuits. See POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in SYSTEM & COMPONENT TESTING article in ENGINE PERFORMANCE. If power and ground circuits are okay, go to next step. If power and ground circuits are not okay, repair power and ground circuits as necessary. Perform «POWERTRAIN CONTROL MODULE VER-1»(ref-91240-S28898862992001030600000) under VERIFICATION TESTS.
  3. Turn ignition switch to OFF position. Disconnect PCM harness connector C3. Disconnect scan tool from Data Link Connector (DLC). Measure resistance between ground and terminal No. 27 (Pink wire) at PCM harness connector C3. (Scheme 11) If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, go to step 6.
  4. Turn ignition switch to OFF position. Disconnect Transmission Control Module (TCM) harness connector, if equipped. Measure resistance between ground and terminal No. 14 (Pink wire) at TCM harness connector. (Scheme 16) If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, replace TCM. See «TRANSMISSION CONTROL MODULE»(ref-91240-S11517013252001030600000) under REMOVAL & INSTALLATION. Perform «POWERTRAIN CONTROL MODULE VER-1»(ref-91240-S28898862992001030600000) under VERIFICATION TESTS.
  5. Turn ignition switch to OFF position. Disconnect Controller Anti-Lock Brake (CAB) harness connector. Measure resistance between ground and terminal No. 20 (Pink wire) at CAB harness connector. (Scheme 17) If resistance is less than 5 ohms, repair short to ground in Pink wire. Perform «POWERTRAIN CONTROL MODULE VER-1»(ref-91240-S28898862992001030600000) under VERIFICATION TESTS. If resistance is 5 ohms or greater, replace CAB. Perform «POWERTRAIN CONTROL MODULE VER-1»(ref-91240-S28898862992001030600000) under VERIFICATION TESTS.
  6. Turn ignition switch to OFF position. Disconnect scan tool from DLC. Measure resistance between ground and terminal No. 29 (Light Green/Black wire) at PCM harness connector C3. If resistance is less than 5 ohms, repair short to ground in Light Green/Black wire. Perform «POWERTRAIN CONTROL MODULE VER-1»(ref-91240-S28898862992001030600000) under VERIFICATION TESTS. If resistance is 5 ohms or greater, go to next step.
  7. Measure resistance of Light Green/Black wire between terminal No. 29 at PCM harness connector C3 and terminal No. 6 at DLC. (Scheme 9)and (Scheme 11). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in Light Green/Black wire. Perform «POWERTRAIN CONTROL MODULE VER-1»(ref-91240-S28898862992001030600000) under VERIFICATION TESTS.
  8. Measure resistance of Pink wire between terminal No. 27 at PCM harness connector C3 and terminal No. 7 at DLC. If resistance is less than 5 ohms, replace PCM. See «POWERTRAIN CONTROL MODULE»(ref-91240-S28898862992001030600000) under REMOVAL & INSTALLATION. Perform «POWERTRAIN CONTROL MODULE VER-1»(ref-91240-S28898862992001030600000) under VERIFICATION TESTS. If resistance is 5 ohms or greater, repair open in Pink wire. Perform «POWERTRAIN CONTROL MODULE VER-1»(ref-91240-S28898862992001030600000) under VERIFICATION TESTS.

Scheme 16

Scheme 16
Scheme 16

Scheme 17

Scheme 17
Scheme 17

No Response From Remote Keyless Entry

  1. Turn ignition switch to OFF position. Disconnect Remote Keyless Entry (RKE) module harness connector, if equipped. See «COMPONENT LOCATIONS»(ref-91240-S10554460982001030600000). Measure voltage between ground and terminal No. 2 (Pink wire) at RKE module harness connector. (Scheme 13) If voltage is less than 10 volts, repair open in Pink wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If voltage is 10 volts or greater, go to next step.
  2. Ensure all lights are off. Measure resistance between ground and terminals No. 3 and 9 (both Black wires) at RKE module harness connector. If all resistances are less than 5 ohms, go to next step. If any resistance is 5 ohms or greater, repair open in appropriate Black wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  3. Using a jumper wire, ground terminal No. 6 (Violet/Brown wire) at RKE module harness connector. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, go to next step. If scan tool does not display SHORT TO GROUND, repair open in Violet/Brown wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  4. Turn ignition switch to OFF position. Using a jumper wire, ground terminal No. 12 (White/Black wire) at RKE module harness connector. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, replace RKE module. See «REMOTE KEYLESS ENTRY MODULE»(ref-91240-S08064593242001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If scan tool does not display SHORT TO GROUND, repair open in White/Black wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

No Response From Sentry Key Immobilizer Module

  1. Turn ignition switch to OFF position. Remove and inspect fuse No. 27 (10-amp) from power distribution center. If fuse is blown, go to next step. If fuse is okay, go to step 4.
  2. Turn ignition switch to OFF position. Replace fuse No. 27 in power distribution center. Turn ignition switch to ON position. Turn ignition switch to OFF position, and inspect fuse No. 27. If fuse is blown, go to next step. If fuse is okay, repair intermittent short to ground in power distribution circuits as necessary. See POWER DISTRIBUTION article in WIRING DIAGRAMS. Perform «SKIS VERIFICATION TEST»(ref-91240-S10304504572001030900000) under VERIFICATION TESTS.
  3. Turn ignition switch to OFF position. Disconnect Sentry Keyless Immobilizer Module (SKIM) harness connector. Measure resistance between ground and terminal No. 6 (Dark Blue/Gray wire) at SKIM harness connector. (Scheme 14) If resistance is less than 5 ohms, repair short to ground in Dark Blue/Gray wire. Perform «SKIS VERIFICATION TEST»(ref-91240-S10304504572001030900000) under VERIFICATION TESTS. If resistance is 5 ohms or greater, replace SKIM. See «SENTRY KEY IMMOBILIZER MODULE»(ref-91240-S20499079592001030600000) under REMOVAL & INSTALLATION. Perform «SKIS VERIFICATION TEST»(ref-91240-S10304504572001030900000) under VERIFICATION TESTS.
  4. Turn ignition switch to OFF position. Ensure fuse No. 27 is installed in power distribution center. Disconnect SKIM harness connector. Measure voltage between ground and terminal No. 6 (Dark Blue/Gray wire) at SKIM harness connector. (Scheme 14) If voltage is less than 10 volts, repair open in Dark Blue/Gray wire. Perform «SKIS VERIFICATION TEST»(ref-91240-S10304504572001030900000) under VERIFICATION TESTS. If voltage is 10 volts or greater, go to next step.
  5. Turn ignition switch to ON position. Measure voltage between ground and terminal No. 4 (White/Black wire) at SKIM harness connector. If voltage is less than 10 volts, repair open in White/Black wire. Perform «SKIS VERIFICATION TEST»(ref-91240-S10304504572001030900000) under VERIFICATION TESTS. If voltage is 10 volts or greater, go to next step.
  6. Turn ignition switch to OFF position. Turn all lights off. Measure resistance between ground and terminals No. 3 and 5 (both Black wires) at SKIM harness connector. If all resistances are less than 5 ohms, go to next step. If any resistance is 5 ohms or greater, repair open in appropriate Black wire. Perform «SKIS VERIFICATION TEST»(ref-91240-S10304504572001030900000) under VERIFICATION TESTS.
  7. Turn ignition switch to OFF position. Using a jumper wire, ground terminal No. 1 (Violet/Brown wire) at SKIM harness connector. Connect scan tool to Data Link Connector (DLC). Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, go to next step. If scan tool does not display SHORT TO GROUND, repair open in Violet/Brown wire. Perform «SKIS VERIFICATION TEST»(ref-91240-S10304504572001030900000) under VERIFICATION TESTS.
  8. Turn ignition switch to OFF position. Using a jumper wire, ground terminal No. 2 (White/Black wire) at SKIM harness connector. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, replace SKIM. See «SENTRY KEY IMMOBILIZER MODULE»(ref-91240-S20499079592001030600000) under REMOVAL & INSTALLATION. Perform «SKIS VERIFICATION TEST»(ref-91240-S10304504572001030900000) under VERIFICATION TESTS. If scan tool does not display SHORT TO GROUND, repair open in White/Black wire. Perform «SKIS VERIFICATION TEST»(ref-91240-S10304504572001030900000) under VERIFICATION TESTS.

No Response From Transmission Control Module

Note. Ensure scan tool communicates with Powertrain Control Module (PCM) before proceeding with this test.

  1. Turn ignition switch to OFF position. Disconnect Transmission Control Module (TCM) harness connector. see scheme 4 Measure resistance between ground and terminal No. 24 (Black/Tan wire) at TCM harness connector. (Scheme 16) If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in Black/Tan wire. Perform «AW4 TRANS VERIFICATION TEST»(ref-91240-S26963737702001030900000) under VERIFICATION TESTS.
  2. Turn ignition switch to ON position. Measure voltage between ground and terminal No. 26 (Dark Blue/White wire) at TCM harness connector. If voltage is less than 10 volts, repair open in Dark Blue/White wire. Perform «AW4 TRANS VERIFICATION TEST»(ref-91240-S26963737702001030900000) under VERIFICATION TESTS. If voltage is 10 volts or greater, go to next step.
  3. Turn ignition switch to OFF position. Using a jumper wire, ground terminal No. 7 (Violet/Brown wire) at TCM harness connector. Connect scan tool to Data Link Connector (DLC). Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, go to next step. If scan tool does not display SHORT TO GROUND, repair open in Violet/Brown wire. Perform «AW4 TRANS VERIFICATION TEST»(ref-91240-S26963737702001030900000) under VERIFICATION TESTS.
  4. Turn ignition switch to OFF position. Using a jumper wire, ground terminal No. 6 (White/Black wire) at TCM harness connector. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, replace TCM. See «TRANSMISSION CONTROL MODULE»(ref-91240-S11517013252001030600000) under REMOVAL & INSTALLATION. Perform «AW4 TRANS VERIFICATION TEST»(ref-91240-S26963737702001030900000) under VERIFICATION TESTS. If scan tool does not display SHORT TO GROUND, repair open in White/Black wire. Perform «AW4 TRANS VERIFICATION TEST»(ref-91240-S26963737702001030900000) under VERIFICATION TESTS.

No Termination Failure

  1. Turn ignition switch to OFF position. Disconnect Powertrain Control Module (PCM) harness connector C3. Using a jumper wire, ground terminal No. 30 (Violet/Brown wire) at PCM harness connector C3. (Scheme 11) Connect scan tool to Data Link Connector (DLC). Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, go to next step. If scan tool does not display SHORT TO GROUND, repair open in Violet/Brown wire. Perform «POWERTRAIN VERIFICATION TEST VER-2»(ref-91240-S20021182262001030900000) under VERIFICATION TESTS.
  2. Turn ignition switch to OFF position. Using a jumper wire, ground terminal No. 28 (White/Black wire) at PCM harness connector C3. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, replace PCM and instrument cluster. See INSTRUMENT PANELS - CHEROKEE article. See «POWERTRAIN CONTROL MODULE»(ref-91240-S28898862992001030600000) under REMOVAL & INSTALLATION. Perform «POWERTRAIN VERIFICATION TEST VER-2»(ref-91240-S20021182262001030900000) under VERIFICATION TESTS. If scan tool does not display SHORT TO GROUND, repair open in White/Black wire. Perform «POWERTRAIN VERIFICATION TEST VER-2»(ref-91240-S20021182262001030900000) under VERIFICATION TESTS.

Not Receiving BUS Messages Correctly

  1. Turn ignition switch to OFF position. Disconnect Powertrain Control Module (PCM) harness connector C3. See «COMPONENT LOCATIONS»(ref-91240-S10554460982001030600000). Connect scan tool to Data Link Connector (DLC). see scheme 1 Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool display BUS OPERATIONAL, replace PCM. See «POWERTRAIN CONTROL MODULE»(ref-91240-S28898862992001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If scan tool does not display BUS OPERATIONAL, go to next step.
  2. Turn ignition switch to OFF position. Disconnect negative battery cable and wait 2 minutes. Disconnect Air Bag Control Module (ACM) harness connector. Connect negative battery cable. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays BUS OPERATIONAL, replace ACM. See «AIR BAG CONTROL MODULE»(ref-91240-S29159333592001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If scan tool does not display BUS OPERATIONAL, go to next step.
  3. Turn ignition switch to OFF position. Disconnect Sentry Keyless Immobilizer Module (SKIM) harness connector. see scheme 5 Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool display BUS OPERATIONAL, replace SKIM. See «SENTRY KEY IMMOBILIZER MODULE»(ref-91240-S20499079592001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If scan tool does not display BUS OPERATIONAL, go to next step.
  4. Turn ignition switch to OFF position. Disconnect Remote Keyless Entry (RKE) module harness connector, if equipped. Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool display BUS OPERATIONAL, replace RKE module. See «REMOTE KEYLESS ENTRY MODULE»(ref-91240-S08064593242001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If scan tool does not display BUS OPERATIONAL, go to next step.
  5. Turn ignition switch to OFF position. Disconnect Compass/Mini-Trip Computer (CMTC) harness connector, if equipped. see scheme 2 Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays BUS OPERATIONAL, replace CMTC. See «COMPASS/MINI-TRIP COMPUTER»(ref-91240-S38914682602001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If scan tool does not display BUS OPERATIONAL, go to next step.
  6. Turn ignition switch to OFF position. Disconnect Transmission Control Module (TCM) harness connector, if equipped. see scheme 4 Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays BUS OPERATIONAL, replace TCM. See «TRANSMISSION CONTROL MODULE»(ref-91240-S11517013252001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If scan tool does not display BUS OPERATIONAL, go to next step.
  7. Connect a known-good scan tool or communication cable to DLC. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool still displays NOT RECEIVING BUS MESSAGES CORRECTLY, replace instrument cluster. See INSTRUMENT PANELS - CHEROKEE article. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If scan tool does not display NOT RECEIVING BUS MESSAGES CORRECTLY, repair or replace scan tool or scan tool cable as necessary. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

All Gauges Inoperative

  1. Turn ignition switch to OFF position. Remove and inspect fuse No. 16 (15-amp) from power distribution center. If fuse is okay, go to next step. If fuse is blown, inspect Pink wire for possible short to ground. See POWER DISTRIBUTION article in WIRING DIAGRAMS. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  2. Connect scan tool to Data Link Connector (DLC). see scheme 1 Turn ignition switch to ON position. Using scan tool, select SYSTEM TEST. If scan tool displays PCM INACTIVE ON BUS, perform «NO RESPONSE FROM POWERTRAIN CONTROL MODULE»(ref-91240-S03924656002001030600000) under COMMUNICATIONS. If scan tool does not display PCM INACTIVE ON BUS, go to next step.
  3. Turn ignition switch to OFF position. Disconnect instrument cluster harness connector C1. Turn ignition switch to ON position. Measure voltage between ground and terminal No. 9 (Pink wire) at instrument cluster harness connector C1. (Scheme 10) If voltage is less than 10 volts, repair open in Pink wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If voltage is 10 volts or greater, go to next step.
  4. Turn ignition switch to OFF position. Remove fuse No. 16 (15-amp) from power distribution center. Measure resistance between ground and terminal No. 9 (Pink wire) at instrument cluster harness connector C1. If resistance is less than 5 ohms, repair short to ground in Pink wire. Replace fuse. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If resistance is 5 ohms or greater, replace instrument cluster. See INSTRUMENT PANELS - CHEROKEE article. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

All CCD Cluster Warning Lights Inoperative

  1. Press and hold trip/reset button on instrument cluster. Cycle ignition switch from OFF to ON positions. Wait until odometer displays mileage, then release trip/reset button. This will start self-test for instrument cluster. Observe all CCD controlled warning lights. See «INSTRUMENT CLUSTER»(ref-91240-S12475972192001030600000) under OPERATION for list of CCD controlled warning lights. If all warning lights illuminate, go to next step. If any warning light does not illuminate, go to step 3.
  2. Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). see scheme 1 Turn ignition switch to ON position. Using scan tool, establish communications with Powertrain Control Module (PCM). If scan tool communicates with PCM, test is complete. If scan tool does not communicate with PCM, perform «NO RESPONSE FROM POWERTRAIN CONTROL MODULE»(ref-91240-S03924656002001030600000) under COMMUNICATIONS.
  3. Turn ignition switch to OFF position. Gain access to rear of instrument cluster. Remove inoperative bulb from instrument cluster and inspect bulb and socket. If fault is found with bulb or socket, repair or replace as necessary. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If no fault is found with bulb or socket, replace instrument cluster. See INSTRUMENT PANELS - CHEROKEE article. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

All Hard Wired Warning Lights Inoperative

  1. Turn ignition switch to OFF position. Gain access to rear of instrument cluster. Remove inoperative bulb from instrument cluster and inspect bulb and socket. If fault is found with bulb or socket, replace as necessary. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If no fault is found, go to next step.
  2. Disconnect instrument cluster connectors. Turn ignition switch to ON position. Check voltage or ground signals for appropriate indicator light. See «INSTRUMENT CLUSTER WARNING LIGHT TERMINAL IDENTIFICATION»(ref-91240-S03308208182001030600000) table. If suspect indicator light circuit does not have voltage or ground signal, inspect appropriate circuit between instrument cluster and monitored system device for an open or short. If suspect indicator light circuit does have voltage or ground signal, replace instrument cluster. See INSTRUMENT PANELS - CHEROKEE article. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
Warning Light(1) Connector/Terminal No.Wire ColorInput
ABSC1/4Light Green/Orange(2) Ground
BrakeC1/2Gray/White(2) Ground
High BeamC1/5Red/Gray(3) Voltage
Left Turn SignalC1/10Light Green/White(4) Voltage
Right Turn SignalC2/6Tan(4) Voltage
Part Time 4WDC2/5Black/Red(2) Ground
Full Time 4WDC2/7Black/White(2) Ground
(1) (Scheme 10) (2) Cycle ignition switch from OFF to ON positions, to perform bulb check while monitoring input state. (3) Actuate high beams. (4) Turn ignition switch to ON and actuate turn signals.
(2)Cycle ignition switch from OFF to ON positions, to perform bulb check while monitoring input state.
(3)Actuate high beams.
(4)Turn ignition switch to ON and actuate turn signals.

INSTRUMENT CLUSTER WARNING LIGHT TERMINAL IDENTIFICATION

One Gauge Not Operating Properly

Note. Ensure instrument cluster is communicating on bus before proceeding.

  1. Turn ignition switch to OFF position. Press and hold trip/reset button on instrument cluster. Cycle ignition switch from OFF to ON positions. Wait until odometer displays mileage, then release trip/reset button. This will initiate instrument cluster self-test. Observe gauges. Compare operation of suspect gauge(s) with instrument cluster self-test chart. (Scheme 18) If all gauges reach calibration point, go to next step. If any gauge does not reach calibration point, go to step 3.
  2. Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). see scheme 1 Turn ignition switch to ON position. Using scan tool, select BODY, ELECTRO/MECH CLUSTER, SYSTEM TEST then monitor PCM status. If scan tool displays PCM ACTIVE ON BUS, go to next step. If scan tool does not display PCM ACTIVE ON BUS, perform «NO RESPONSE FROM POWERTRAIN CONTROL MODULE (PCM)»(ref-91240-S03924656002001030600000).
  3. Turn ignition switch to OFF position. Identify inoperative gauge, and perform appropriate test. See «GAUGE TEST INDEX»(ref-91240-S17201141492001030900000) table. After test is complete, perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. GAUGE TEST INDEX Gauge Go To Speedometer Next Step Temperature (1) Fuel Level (1) Tachometer (1) Voltage (1) (1) Perform appropriate test. See SELF-DIAGNOSTICS - CHEROKEE article in ENGINE PERFORMANCE.
  4. Raise and support vehicle. Start engine, and place gearshift selector in forward gear. Using scan tool, monitor Vehicle Speed Sensor (VSS) status while drive wheels are moving. If scan tool and speedometer match, repair VSS signal related DTC. See SELF-DIAGNOSTICS - CHEROKEE article in ENGINE PERFORMANCE. If scan tool and speedometer do not match, replace instrument cluster. See INSTRUMENT PANELS - CHEROKEE article. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

Scheme 18

Scheme 18
Scheme 18

Chime Inoperative

Replace instrument cluster. See INSTRUMENT PANELS - CHEROKEE article. Perform BODY VERIFICATION TEST under VERIFICATION TESTS.

Compass/Mini-Trip Computer Average MPH Or Fuel Economy Wrong, Or CMTC Distance To Empty Inoperative Or Wrong

  1. Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). see scheme 1 Turn ignition switch to ON position. Using scan tool, select BODY, ELECTRO/MECH CLUSTER, SYSTEM TEST, then monitor Powertrain Control Module (PCM) status. If scan tool displays PCM ACTIVE ON BUS, go to next step. If scan tool does not display PCM ACTIVE ON BUS, perform «NO RESPONSE FROM POWERTRAIN CONTROL MODULE»(ref-91240-S03924656002001030600000).
  2. Turn ignition switch to OFF position. Raise and support vehicle. Start engine and place gearshift selector in forward gear. Using scan tool, monitor Vehicle Speed Sensor (VSS) status while drive wheels are moving. If scan tool displays approximate wheel speed, go to next step. If scan tool does not display approximate wheel speed, repair VSS signal. See SELF-DIAGNOSTICS - CHEROKEE article in ENGINE PERFORMANCE. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  3. Verify fuel gauge is operating correctly. If fuel gauge is operating correctly, repair fuel level sensor related DTCs. See SELF-DIAGNOSTICS - CHEROKEE article in ENGINE PERFORMANCE. If fuel gauge is not operating correctly, replace CMTC. See «COMPASS/MINI-TRIP COMPUTER»(ref-91240-S38914682602001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

Compass/Mini-Trip Computer Elapsed Time Wrong

Replace Compass/Mini-Trip Computer (CMTC). See COMPASS/MINI-TRIP COMPUTER under REMOVAL & INSTALLATION. Perform BODY VERIFICATION TEST under VERIFICATION TESTS.

Compass/Mini-Trip Computer Does Not Light

Perform Compass/Mini-Trip Computer (CMTC) self-test, by using scan tool or pressing US/M and STEP buttons simultaneously. Turn ignition switch to ON position. All segments of CMTC should illuminate while internal functions are being checked. If all segments illuminate, test is complete. If any segment does not illuminate, replace CMTC. See COMPASS/MINI-TRIP COMPUTER under REMOVAL & INSTALLATION. Perform BODY VERIFICATION TEST under VERIFICATION TESTS.

Compass/Mini-Trip Computer Shows CCD

When Compass/Mini-Trip Computer (CMTC) displays CCD, a communication problem exists. Repair communications problem as necessary. See SELF-DIAGNOSTIC SYSTEM .

Compass/Mini-Trip Computer Displays OC

  1. Turn ignition switch to OFF position. Disconnect ambient temperature sensor harness connector. Sensor is located behind front bumper (right center). Remove ambient temperature sensor. Measure resistance between terminals (component side) at ambient temperature sensor. See «AMBIENT TEMPERATURE SENSOR SPECIFICATIONS»(ref-91240-S03053232842001030900000) table. If resistance and temperature are as specified, go to next step. If resistance and temperature are not as specified, replace ambient temperature sensor. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. AMBIENT TEMPERATURE SENSOR SPECIFICATIONS Temperature - °F (°C) Resistance 32 (0) 29.3-36 50 (10) 18-22 68 (20) 11.4-13.6 77 (25) 9.1-10.8 86 (30) 7.4-8.7 104 (40) 4.9-5.7 122 (50) 3.3-3.8
  2. Turn ignition switch to OFF position and wait one minute. Measure resistance between ground and terminal No. 2 (Black/Light Blue wire) at ambient temperature sensor harness connector. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in Black/Light Blue wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  3. Disconnect Compass/Mini-Trip Computer (CMTC) harness connector. see scheme 2 Measure resistance of Violet/Light Green wire between terminal No. 1 at ambient temperature sensor harness connector and terminal No. 4 at CMTC harness connector. If resistance is less than 5 ohms, replace CMTC. See «COMPASS/MINI-TRIP COMPUTER»(ref-91240-S38914682602001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If resistance is 5 ohms or greater, repair open in Violet/Light Green wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

Compass/Mini-Trip Computer Displays SC

  1. Turn ignition switch to OFF position. Disconnect ambient temperature sensor harness connector. Sensor is located behind front bumper (right center). Remove ambient temperature sensor. Measure resistance between terminals (component side) at ambient temperature sensor. See «AMBIENT TEMPERATURE SENSOR SPECIFICATIONS»(ref-91240-S03053232842001030900000) table. If resistance and temperature are as specified, go to next step. If resistance and temperature are not as specified, replace ambient temperature sensor. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  2. Measure resistance between ground and terminal No. 2 (Black/Light Blue wire) at ambient temperature sensor harness connector. If resistance is less than 5 ohms, repair short to ground in Black/Light Blue wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If resistance is 5 ohms or greater, replace CMTC. See «COMPASS/MINI-TRIP COMPUTER»(ref-91240-S38914682602001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

Compass/Mini-Trip Computer Switch Inoperative

  1. Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). see scheme 1 Turn ignition switch to ON position. Using scan tool, select COMPASS/MINI-TRIP, INPUT/OUTPUT and monitor button display. If scan tool does not display any button pressed, go to next step. If scan tool displays all buttons pressed, replace CMTC push button module assembly. See «COMPASS/MINI-TRIP COMPUTER»(ref-91240-S38914682602001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  2. Using scan tool, select COMPASS /MINI-TRIP, INPUTS/OUTPUTS then monitor button display. Observe scan tool display while pressing STEP button, then US/M button. If scan tool displays PRESSED with all buttons, test is complete. If scan tool does not display PRESSED with any button, replace CMTC push button module assembly. See «COMPASS/MINI-TRIP COMPUTER»(ref-91240-S38914682602001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

Compass/Mini-Trip Odometer Incorrect Or Inoperative

  1. Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). see scheme 1 Turn ignition switch to ON position. Using scan tool, select BODY, ELECTRO/MECH CLUSTER, SYSTEM TEST then monitor Powertrain Control Module (PCM) status. If scan tool displays PCM ACTIVE ON BUS, go to next step. If scan tool does not display PCM ACTIVE ON BUS, perform «NO RESPONSE FROM POWERTRAIN CONTROL MODULE»(ref-91240-S03924656002001030600000).
  2. Turn ignition switch to OFF position. Raise and support vehicle. Start engine and place gearshift selector in forward gear. Using scan tool, monitor Vehicle Speed Sensor (VSS) while drive wheels are moving. If scan tool displays approximate wheel speed, replace CMTC. See «COMPASS/MINI-TRIP COMPUTER»(ref-91240-S38914682602001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If scan tool does not display approximate wheel speed, repair VSS signal related DTCs. See SELF-DIAGNOSTICS - CHEROKEE article in ENGINE PERFORMANCE. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

POWER DOOR LOCKS/REMOTE KEYLESS ENTRY SYSTEM

Note. On models equipped with compass, Remote Keyless Entry (RKE) module is part of overhead console. On models equipped without compass, RKE module is part of dome light assembly.

Illuminated Entry Inoperative

  1. Turn ignition switch to OFF position. Operate door locks by using Remote Keyless Entry (RKE) transmitter. If door locks operate correctly with RKE transmitter, go to next step. If door locks do not operate correctly with RKE transmitter, repair remote keyless entry concern. Perform «REMOTE KEYLESS ENTRY INOPERATIVE»(ref-91240-S20742579232001030600000).
  2. Check courtesy light operation by opening and closing doors, and using dash switch. If courtesy lights operate correctly, go to next step. If courtesy lights do not operate, repair courtesy light concern. See ILLUMINATION/INTERIOR LIGHTS article. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  3. Turn ignition switch to OFF position. Disconnect RKE module harness connector. RKE module is mounted in roof or overhead console. Close all doors. Using a jumper wire ground terminal No. 1 (Yellow wire) at RKE module harness connector. (Scheme 13) If courtesy lights illuminate, replace RKE module. See «REMOTE KEYLESS ENTRY MODULE»(ref-91240-S08064593242001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If courtesy lights do not illuminate, repair open in Yellow wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

Remote Keyless Entry Inoperative

Note. Ensure power door locks operate correctly before proceeding with test.

  1. Remove batteries from Remote Keyless Entry (RKE) transmitter. Measure voltage of batteries. If voltage is less than 3 volts, replace batteries. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If voltage is 3 volts or greater, go to next step.
  2. Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). see scheme 1 Turn ignition switch to ON position. Using scan tool, select THEFT ALARM, VTSS, MISCELLANEOUS then PROGRAM RKE. Follow scan tool instructions and program a transmitter to be used with vehicle. Operate door locks using transmitter. If door locks do not operate properly, go to next step. If door locks operate properly, program remaining transmitters. See «REMOTE KEYLESS ENTRY»(ref-91240-S20969660892001030600000) under PROGRAMMING. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  3. Turn ignition switch to OFF position. Disconnect RKE module harness connector. Measure voltage between ground and terminal No. 2 (Pink wire) at RKE module harness connector. (Scheme 13) If voltage is less than 10 volts, repair open in Pink wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If voltage is 10 volts or greater, go to next step.
  4. Ensure all lights are off. Measure resistance between ground and terminals No. 3 and 9 (both Black wires) at RKE module harness connector. If all resistances are less than 5 ohms, go to next step. If any resistance is 5 ohms or greater, repair open in appropriate Black wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  5. Using a jumper wire, momentarily ground terminal No. 5 (Dark Blue wire) at RKE module harness connector. If door lock motors actuate, go to next step. If door lock motors do not actuate, go to step 7.
  6. Using a jumper wire, momentarily ground terminal No. 11 (Light Blue/Red wire) at RKE module harness connector. If door lock motors actuate, replace RKE module. See «REMOTE KEYLESS ENTRY MODULE»(ref-91240-S08064593242001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If door lock motors do not actuate, go to next step.
  7. Remove passenger's door panel. Disconnect passenger's door module harness connector C2. Measure resistance in circuit between terminal No. 2 at Passenger's Door Module (PDM) harness connector and terminal No. 5 at RKE module harness connector. (Scheme 13)and (Scheme 19). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in Dark Blue wire and/or Dark Blue/Pink wire between RKE module and PDM. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.
  8. Measure resistance of Light Blue/Red wire between terminal No. 1 at passenger's door module harness connector C2 and terminal No. 11 at RKE module harness connector. If resistance is less than 5 ohms, replace RKE module. See «REMOTE KEYLESS ENTRY MODULE»(ref-91240-S08064593242001030600000) under REMOVAL & INSTALLATION. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS. If resistance is 5 ohms or greater, repair open in Light Blue/Red wire. Perform «BODY VERIFICATION TEST»(ref-91240-S24709081812001030600000) under VERIFICATION TESTS.

Scheme 19

Scheme 19
Scheme 19

VEHICLE THEFT SECURITY SYSTEM

Note. Sentry Key Immobilizer System (SKIS) diagnosis may require use of all sentry keys.

Internal Fault, Antenna, COP, EEPROM, RAM, Serial Link Internal Or Stack Overflow Failure

Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). see scheme 1 Turn ignition switch to ON position. Using scan tool, read and record Sentry Key Immobilizer Module (SKIM) DTCs. Erase SKIM DTCs. Cycle ignition switch from OFF to ON positions 10 times, leaving ignition switch in ON position for a minimum of 90 seconds per cycle. Recheck for DTCs. If DTCs reset, replace SKIM. See SENTRY KEY IMMOBILIZER MODULE under REMOVAL & INSTALLATION. Perform SKIS VERIFICATION TEST under VERIFICATION TESTS. If DTCs do not reset, test is complete.

PCM Status Or Serial Link External Failure

  1. Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). see scheme 1 Turn ignition switch to ON position. Using scan tool, read and record Sentry Key Immobilizer Module (SKIM) DTCs. Erase DTCs. Turn ignition switch to OFF position and wait 2 minutes. Turn ignition switch to ON position. Recheck for DTCs. If DTCs reset, go to next step. If DTCs do not reset, go to step 4.
  2. Turn ignition switch to OFF position. Visually inspect connectors at Powertrain Control Module (PCM) and SKIM for damaged terminals or chaffed wires. See «COMPONENT LOCATIONS»(ref-91240-S10554460982001030600000). Check wiring harness for damage. Check for related Technical Service Bulletins (TSB). If no fault is found, go to next step. If fault is found, repair as necessary. Perform «SKIS VERIFICATION TEST»(ref-91240-S10304504572001030900000) under VERIFICATION TESTS.
  3. Turn ignition switch to ON position. Using scan tool, display and erase all PCM and SKIM DTCs. Cycle ignition switch from OFF to ON positions 5 times, leaving ignition switch in ON position for a minimum of 90 seconds per cycle. Using scan tool, read and record SKIM DTCs. If DTCs reset, replace PCM. See «POWERTRAIN CONTROL MODULE»(ref-91240-S28898862992001030600000) under REMOVAL & INSTALLATION. Perform «SKIS VERIFICATION TEST»(ref-91240-S10304504572001030900000) under VERIFICATION TESTS. If DTCs do not reset, test is complete.
  4. Turn ignition switch to OFF position. Visually inspect connectors at PCM and SKIM for damaged terminals or chaffed wires. See «COMPONENT LOCATIONS»(ref-91240-S10554460982001030600000). Check wiring harness for damage. Check for related Technical Service Bulletins (TSB). If no fault is found, test is complete. If fault is found, repair as necessary. Perform «SKIS VERIFICATION TEST»(ref-91240-S10304504572001030900000) under VERIFICATION TESTS.

Transponder CRC Failure, Transponder Communication Failure, Transponder ID Mismatch, Or Transponder Response Mismatch

  1. Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). see scheme 1 Turn ignition switch to ON position. Using scan tool, read and record DTCs. Erase DTCs. Turn ignition switch to OFF position and wait 10 seconds. Turn ignition switch to ON position. Recheck for DTCs. If DTC resets, go to next step. If DTC does not reset, go to step 6.
  2. Verify if multiple sentry keys are available. If multiple sentry keys are available, go to next step. If multiple sentry keys are not available, go to step 4.
  3. Using scan tool, erase DTCs. Turn ignition switch to OFF position and wait 10 seconds. Turn ignition switch to ON position. Using scan tool, read and record DTCs. If DTC resets for all sentry keys, replace Sentry Key Immobilizer Module (SKIM). See «SENTRY KEY IMMOBILIZER MODULE»(ref-91240-S20499079592001030600000) under REMOVAL & INSTALLATION. Perform «SKIS VERIFICATION TEST»(ref-91240-S10304504572001030900000) under VERIFICATION TESTS. If DTC does not reset for any sentry key, test is complete.
  4. Using scan tool, program sentry keys into SKIM. See «PROGRAMMING BLANK SENTRY KEYS USING SCAN TOOL»(ref-91240-S35910253812001030600000) under PROGRAMMING. Using scan tool, erase SKIM DTCs. Turn ignition switch to OFF position and wait 10 seconds. Turn ignition switch to ON position. Using scan tool, read and record DTCs. If DTC resets, go to next step. If DTC does not reset, test is complete.
  5. Replace ignition key and program into SKIM. See «PROGRAMMING BLANK SENTRY KEYS USING SCAN TOOL»(ref-91240-S35910253812001030600000) under PROGRAMMING. Using scan tool, erase DTCs. Turn ignition switch to OFF position and wait 10 seconds. Turn ignition switch to ON position. Using scan tool, read and record DTCs. If DTC resets, go to next step. If DTC does not reset, test is complete.
  6. Turn ignition switch to OFF position. Visually inspect connectors at Powertrain Control Module (PCM) and SKIM for damaged terminals or chaffed wires. See «COMPONENT LOCATIONS»(ref-91240-S10554460982001030600000). Check wiring harness for damage. Check for related Technical Service Bulletins (TSB). If no fault is found, replace SKIM. See «SENTRY KEY IMMOBILIZER MODULE»(ref-91240-S20499079592001030600000) under REMOVAL & INSTALLATION. Perform «SKIS VERIFICATION TEST»(ref-91240-S10304504572001030900000) under VERIFICATION TESTS. If fault is found, repair as necessary. Perform «POWERTRAIN VERIFICATION TEST VER-1»(ref-91240-S21304200362001030600000) under VERIFICATION TESTS.

Rolling Code Failure Or VIN Mismatch

  1. Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). see scheme 1 Turn ignition switch to ON position. Using scan tool, read and record DTCs. Erase DTCs. Turn ignition switch to OFF position and wait 10 seconds. Turn ignition switch to ON position. Using scan tool, read and record DTCs. If DTC resets, go to next step. If DTC does not reset, go to step 4.
  2. Using scan tool, select ENGINE. Display and record Vehicle Identification Number (VIN). If displayed VIN matches vehicle actual VIN, go to next step. If displayed VIN does not match vehicle actual VIN, replace Powertrain Control Module (PCM). See «POWERTRAIN CONTROL MODULE»(ref-91240-S28898862992001030600000) under REMOVAL & INSTALLATION. Perform «SKIS VERIFICATION TEST»(ref-91240-S10304504572001030900000) under VERIFICATION TESTS.
  3. Turn ignition switch to OFF position. Replace Sentry Key Immobilizer Module (SKIM). See «SENTRY KEY IMMOBILIZER MODULE»(ref-91240-S20499079592001030600000) under REMOVAL & INSTALLATION. Turn ignition switch to ON position. Using scan tool, read and erase all PCM and SKIM DTCs. Cycle ignition switch from OFF to ON positions 5 times, leaving ignition switch in ON position for 90 seconds per cycle. Using scan tool, read and record DTCs. If DTC resets, replace PCM. See «POWERTRAIN CONTROL MODULE»(ref-91240-S28898862992001030600000) under REMOVAL & INSTALLATION. Perform «SKIS VERIFICATION TEST»(ref-91240-S10304504572001030900000) under VERIFICATION TESTS. If DTC does not reset, test is complete.
  4. Turn ignition switch to OFF position. Visually inspect connectors at PCM and SKIM for damaged terminals or chaffed wires. See «COMPONENT LOCATIONS»(ref-91240-S10554460982001030600000). Check wiring harness for damage. Check for related Technical Service Bulletins (TSB). If no fault is found, test is complete. If fault is found, repair as necessary. Perform «SKIS VERIFICATION TEST»(ref-91240-S10304504572001030900000) under VERIFICATION TESTS.

AIR BAG CONTROL MODULE

WARNINGDO NOT reconnect battery before turning ignition switch to ON position and ensuring no one is in vehicle. Air bag may deploy.

Note. Disconnect battery and wait 2 minutes before disconnecting Air bag Control Module (ACM). If ACM is dropped, it must be replaced.

REMOTE KEYLESS ENTRY MODULE

Note. Remote Keyless Entry (RKE) module is part of mini-dome light and is replaced as one unit.

SENTRY KEY IMMOBILIZER MODULE

WARNINGDO NOT reconnect battery before turning ignition switch to ON position and ensuring no one is in vehicle. Air bag may deploy.
WARNINGVehicles are equipped with air bag supplemental restraint system. Before attempting ANY repairs involving steering column, instrument panel or related components, see SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM in appropriate AIR BAG RESTRAINT SYSTEMS article.

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