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Test M: No Module/Network Communication - ISO 9141 Link

NOTE: Depending on module configuration, with all modules connected and with ignition switch in RUN position or with engine running, 2-3 volts may be present at Data Link Connector (DLC) terminal No. 7 (Gray/Black wire). This is the International Standards Organization (ISO) 9141 diagnostic communications network circuit.
  1. Turn ignition switch to RUN position. Measure voltage between Data Link Connector (DLC) terminals No. 4 (Black wire) and No. 7 (Gray/Black wire). DLC is located below driver's side of instrument panel, to right of steering column. Measure voltage between DLC terminals No. 7 (Gray/Black wire) and No. 16 (Orange/Yellow wire). See Figure . If voltage is not indicated in both measurements, go to next step. If voltage is indicated in both measurements, replace Restraints Control Module (RCM).
  2. Turn ignition switch to LOCK position. Disconnect Anti-Lock Brake System (ABS) control module harness connector. ABS control module is located in right front corner of engine compartment. Turn ignition switch to RUN position. Measure voltage between DLC terminals No. 4 (Black wire) and No. 7 (Gray/Black wire). Measure voltage between DLC terminals No. 7 (Gray/Black wire) and No. 16 (Orange/Yellow wire). If voltage is not indicated in both measurements, go to next step. If voltage is indicated in both measurements, replace ABS control module.
  3. Turn ignition switch to LOCK position. Disconnect 20-pin in-line harness connector C211. In-line harness connector C211 is located behind driver's side kick panel. See Figure . Turn ignition switch to RUN position. Measure voltage between DLC terminals No. 4 (Black wire) and No. 7 (Gray/Black wire). Measure voltage between DLC terminals No. 7 (Gray/Black wire) and No. 16 (Orange/Yellow wire). If voltage is not indicated in both measurements, go to next step. If voltage is indicated in both measurement, repair short to ground or voltage in Gray wire between in-line harness connector C211 and ABS control module.
  4. Turn ignition switch to LOCK position. Disconnect 20-pin in-line harness connector C212. In-line harness connector C212 is located behind driver's side kick panel. See Figure . Turn ignition switch to RUN position. Measure voltage between DLC terminals No. 4 (Black wire) and No. 7 (Gray/Black wire). Measure voltage between DLC terminals No. 7 (Gray/Black wire) and No. 16 (Orange/Yellow wire). If voltage is indicated in either measurement, repair short to ground or voltage in Gray/Black wire between in-line harness connector C212 and DLC. If voltage is not indicated in either measurement, go to next step.
  5. Turn ignition switch to LOCK position. Deactivate air bag system. See appropriate AIR BAG RESTRAINT SYSTEMS article. Disconnect Restraints Control Module (RCM) 26-pin harness connector C310a. RCM is located under center console. Connect in-line harness connector C212. Turn ignition switch to RUN position. Measure voltage between DLC terminals No. 4 (Black wire) and No. 7 (Gray/Black wire). Measure voltage between DLC terminals No. 7 (Gray/Black wire) and No. 16 (Orange/Yellow wire). If voltage is indicated in either measurement, repair short to ground or voltage in wiring between in-line harness connector C212, RCM and in-line harness connector C211. If voltage is not indicated in either measurement, replace RCM.
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