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Test 9A - Short To Ground

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION  . For wiring diagram, see WIRING DIAGRAMS article in this section.
CAUTION: Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
  1. Using DRB, indicate whether vehicle is equipped with specific module. For module/system options available, refer to the MODULE APPLICATIONS  table under IDENTIFICATION. Turn ignition off. Disconnect Transmission Control Module (TCM) connector, if equipped. TCM is located on left side of engine compartment, near cowl. Turn ignition on. If DRB does not display BUS SHORT TO GROUND, replace TCM. Perform TEST VER-1  .
  2. If DRB displays BUS SHORT TO GROUND, turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located between Data Link Connector (DLC) and battery, on fenderwell. Turn ignition on. If DRB does not display BUS SHORT TO GROUND, replace PCM. Perform TEST VER-1  .
  3. If DRB displays BUS SHORT TO GROUND, turn ignition off. Disconnect Controller Anti-Lock Brake (CAB) module connector, if equipped. Turn ignition on. If DRB does not display BUS SHORT TO GROUND, go to TEST 9B  .
  4. If DRB displays BUS SHORT TO GROUND, turn ignition off. Disconnect Mechanical Instrument Cluster (MIC) or Electronic Instrument Cluster (EIC) connector. Turn ignition on. If DRB does not display BUS SHORT TO GROUND, replace MIC or EIC. Perform TEST VER-1  .
  5. If DRB displays BUS SHORT TO GROUND, turn ignition off. Disconnect Vehicle Theft Security System (VTSS) module connector, if equipped. Turn ignition on. If DRB does not display BUS SHORT TO GROUND, replace VTSS module. Perform TEST VER-1  .
  6. If DRB displays BUS SHORT TO GROUND, turn ignition off. Disconnect compass/mini-trip module connector, if equipped. Compass/mini-trip module is located at center of roof, above visors. Turn ignition on. If DRB does not display BUS SHORT TO GROUND, replace compass/mini-trip module. Perform TEST VER-1  .
  7. If DRB displays BUS SHORT TO GROUND, turn ignition off. Disconnect Automatic Temperature Control (ATC) module connector, if equipped. Turn ignition on. If DRB does not display BUS SHORT TO GROUND, replace ATC module. Perform TEST VER-1  .
  8. If DRB displays BUS SHORT TO GROUND, turn ignition off. Disconnect Body Control Module (BCM) connectors, if equipped. BCM is located under lower knee panel of dashboard. Turn ignition on. If DRB does not display BUS SHORT TO GROUND, replace BCM. Perform TEST VER-1  . If DRB displays BUS SHORT TO GROUND, disconnect DRB.
  9. Using an external ohmmeter, check resistance between CCD DLC, CCD BUS positive circuit (Violet/Brown wire) and ground. If resistance is more than 5 ohms, repair short to ground in CCD BUS positive circuit. Perform TEST VER-1  .
  10. If resistance is less than 5 ohms, check resistance between CCD DLC, CCD BUS negative circuit (White/Black wire) and ground.
  11. If resistance is more than 5 ohms, repair short to ground in CCD BUS negative circuit. Perform TEST VER-1  . If resistance is less than 5 ohms, replace DRB cable or cartridge as necessary. Perform TEST VER-1  .
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