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Test 9A - Short To Ground

NOTE: For connector terminal identification, see CONNECTOR  IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS  . Perform TEST VER-1 after each repair.
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. See 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.
  2. If DRB displays BUS SHORT TO GROUND, turn ignition off and disconnect Powertrain Control Module (PCM). 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.
  3. If DRB displays BUS SHORT TO GROUND, turn ignition off and disconnect Controller Anti-Lock Brake (CAB), if equipped. CAB is located on left fenderwell of engine compartment, behind anti-lock brake pump motor. 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 and disconnect traveler module, if equipped. Traveler module is located in bottom of center section of dash. Turn ignition on. If DRB does not display BUS SHORT TO GROUND, replace traveler module.
  5. If DRB displays BUS SHORT TO GROUND, turn ignition off and disconnect Mechanical Instrument Cluster (MIC) or Electronic Instrument Cluster (EIC). Turn ignition on. If DRB does not display BUS SHORT TO GROUND, replace MIC or EIC.
  6. If DRB displays BUS SHORT TO GROUND, turn ignition off and disconnect Vehicle Theft Security System (VTSS) module, if equipped. VTSS module is located in back of glove box. Turn ignition on. If DRB does not display BUS SHORT TO GROUND, replace VTSS module. If DRB displays BUS SHORT TO GROUND, turn ignition off and wait 5 minutes.
    CAUTION: Ensure ignition is off for 5 minutes before proceeding.
  7. Disconnect Air Bag System Control Module (ABSCM). ABSCM is located under center of instrument panel. Turn ignition on. If DRB does not display BUS SHORT TO GROUND, replace ABSCM.
  8. If DRB displays BUS SHORT TO GROUND, turn ignition off and disconnect Auto Temperature Control (ATC) head, if equipped. Turn ignition on. If DRB does not display BUS SHORT TO GROUND, replace ATC.
  9. If DRB displays BUS SHORT TO GROUND, turn ignition off and disconnect Overhead Traveler Information System (OTIS) module, if equipped. OTIS is located at center of roof, above visors. Turn ignition on. If DRB does not display BUS SHORT TO GROUND, replace OTIS.
  10. If DRB displays BUS SHORT TO GROUND, turn ignition off and disconnect Body Control Module (BCM), if equipped. BCM is located behind right kick panel. Turn ignition on. If DRB does not display BUS SHORT TO GROUND, replace BCM. If DRB displays BUS SHORT TO GROUND, disconnect DRB.
  11. Using an external ohmmeter, check resistance between chassis ground and DLC terminal No. 4 (Violet/Brown wire). If resistance is less than 5 ohms, repair short to ground in Violet/Brown wire.
  12. If resistance is more than 5 ohms, check resistance between chassis ground and DLC terminal No. 3 (White/Black wire) If resistance is less than 5 ohms, repair short to ground in White/Black wire. If resistance is more than 5 ohms, replace DRB cable or cartridge as necessary.
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