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Home >> Plymouth >> 1993 >> Voyager Base, 3.0 3 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Body Control Computer >> Vehicle Communication Tests >> Test 7A - Short To Battery

Test 7A - Short To Battery

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION. For wiring diagrams, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.
CAUTION: Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
  1. Using DRB-II, indicate whether vehicle is equipped with specific module. Turn ignition off. Disconnect Transmission Control Module (TCM), if equipped. TCM is located on left side of engine compartment near cowl. Turn ignition on. If DRB-II does not display BUS SHORT TO BATTERY, replace TCM. Perform TEST VER-1.
  2. If DRB-II displays BUS SHORT TO BATTERY, turn ignition off and disconnect Powertrain Control Module (PCM). PCM is located between CCD data link connector and battery on fenderwell.
  3. Turn ignition on. If DRB-II does not display BUS SHORT TO BATTERY, go to TEST 7B. If DRB-II displays BUS SHORT TO BATTERY, turn ignition off and disconnect Controller Anti-Lock Brake (CAB) module, if equipped.
  4. Turn ignition on. If DRB-II does not display BUS SHORT TO BATTERY, go to TEST 7C. If DRB-II displays BUS SHORT TO BATTERY, turn ignition off and disconnect Mechanical Instrument Cluster (MIC) or Electronic Instrument Cluster (EIC). Turn ignition on. If DRB-II does not display BUS SHORT TO BATTERY, go to TEST 7E. If DRB-II displays BUS SHORT TO BATTERY, turn ignition off and disconnect Vehicle Theft Alarm (VTA) module, if equipped.
  5. Turn ignition on. If DRB-II does not display BUS SHORT TO BATTERY, replace VTA module. Perform TEST VER-1. If DRB-II displays BUS SHORT TO BATTERY, turn ignition off and disconnect compass/mini trip module, if equipped. Compass/mini trip module is located at center of roof, above visors. Turn ignition on. If DRB-II does not display BUS SHORT TO BATTERY, replace compass/mini trip module. Perform TEST VER-1.
  6. If DRB-II displays BUS SHORT TO BATTERY, turn ignition off and disconnect auto temperature control head, if equipped. Turn ignition on. If DRB-II does not display BUS SHORT TO BATTERY, replace auto temperature control head. Perform TEST VER-1.
  7. If DRB-II displays BUS SHORT TO BATTERY, turn ignition off and disconnect Body Control Module (BCM), if equipped. BCM is located behind knee panel below dashboard. Turn ignition on. If DRB-II does not display BUS SHORT TO BATTERY, go to TEST 7F. If DRB-II displays BUS SHORT TO BATTERY, disconnect DRB-II.
  8. Using an external voltmeter, check voltage between CCD data link connector CCD bus positive circuit (White/Violet wire on YJ body and Violet/Brown wire on all others) and ground. If voltage is more than 8 volts, repair short to voltage in CCD bus positive circuit. Perform TEST VER-1.
  9. If voltage is less than 8 volts, check voltage between CCD data link connector CCD bus negative circuit (White/Black wire on AS) and ground.
  10. If voltage is more than 8 volts, repair short to voltage in CCD bus negative circuit. Perform TEST VER-1. If voltage is less than 8 volts, replace DRB-II cable or cartridge as necessary. Perform TEST VER-1.
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