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Test J: No Module/Network Communications - ISO 9141 Link

  1. Turn ignition off. Inspect Data Link Connector (DLC) for physical damage, bent terminals or corrosion. Pay particular attention to terminal No. 7 (Light Blue/White wire). Repair connector as necessary and retest system for normal operation. If connector is okay, go to next step.
  2. Ensure ignition is off. Disconnect Lighting Control Module (LCM) connector C2027 located behind driver's side of instrument panel, right of steering column. See Figure . Measure resistance of Light Blue/White wire between terminal No. 8 at LCM connector C2027 and terminal No. 7 at DLC. See Figure and Figure . If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair Light Blue/White wire between LCM connector and DLC. Retest system for normal operation.
    NOTE: ISO 9141 communication network (circuit No. 70) will not function if circuit No. 70 (Light Blue/White wire) is shorted to ground or power. Steps 3)-8) are used for locating a short in circuit No. 70.
  3. Turn ignition on. Measure voltage between terminal No. 7 (Light Blue/White wire) and terminals No. 16 (Yellow/Black wire) and No. 4 (Black wire) at DLC. See Figure . If any reading indicates voltage, go to next step (vehicle with driver's door module) or go to step 7) (vehicle without driver's door module). If both readings indicate zero volts, replace LCM and retest system for normal operation.
  4. Turn ignition off. Disconnect Driver's Door Module (DDM) 12-pin connector C518 located inside of driver's door. Inspect connector for loose, damaged or corroded terminals. Pay particular attention to terminal No. 1 (Light Blue/White wire). See Figure . Repair as necessary and retest system for normal operation. If connector is okay, go to next step.
  5. Turn ignition on. Measure voltage between terminal No. 7 (Light Blue/White wire) and terminals No. 16 (Yellow/Black wire) and No. 4 (Black wire) at DLC. See Figure . If any reading indicates voltage, go to next step. If both readings indicate zero volts, replace DDM and retest system for normal operation.
  6. Turn ignition off. Disconnect 16-pin connector C211 located behind left kick panel. See Figure . Turn ignition on. Measure voltage between terminal No. 7 (Light Blue/White wire) and terminals No. 16 (Yellow/Black wire) and No. 4 (Black wire) at DLC. See Figure . If any reading indicates voltage, go to next step. If both readings indicate zero volts, repair Light Blue/White wire between connector C211 and DDM connector.
  7. Turn ignition off. Deactivate air bag system. See appropriate AIR BAG RESTRAINT SYSTEMS article. Disconnect air bag Electronic Crash Sensor (ECS) module connector located behind right side of instrument panel, above glove box. Inspect ECS module connector for loose, damaged or corroded terminals. Pay particular attention to terminal No. 19 (Light Blue/White wire). Repair as necessary and retest system for normal operation. If connector is okay, go to next step.
  8. Turn ignition off. Disconnect 16-pin connector C211 located behind left kick panel. See Figure . Turn ignition on. Measure voltage between terminal No. 7 (Light Blue/White wire) and terminals No. 16 (Yellow/Black wire) and No. 4 (Black wire) at DLC. See Figure . If any reading indicates voltage, repair Light Blue/White wire between DLC, connector C211, ECS module and DDM connector. Retest system for normal operation. If both readings indicate zero volts, replace air bag ECS module and retest system for normal operation.
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