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Home >> Eagle >> 1993 >> Vision ESi >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Body Control Computer >> Vehicle Communications Tests >> Test 8A - Short To 5 Volts
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Test 8A - Short To 5 Volts

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION  . For appropriate wiring diagram, see WIRING DIAGRAMS  at end of article.
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). TCM is located on left side of engine compartment, at front.
  2. Turn ignition on. If DRB-II does not display BUS SHORT TO 5 VOLTS, replace TCM. Perform VERIFICATION PROCEDURE VER-1. If DRB-II displays BUS SHORT TO 5 VOLTS, turn ignition off, and disconnect Powertrain Control Module (PCM). PCM is located under air box in engine compartment.
  3. Turn ignition on. If DRB-II does not display BUS SHORT TO 5 VOLTS, go to TEST 8B. If DRB-II displays BUS SHORT TO 5 VOLTS, 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.
  4. Turn ignition on. If DRB-II does not display BUS SHORT TO 5 VOLTS, replace CAB. If DRB-II displays BUS SHORT TO 5 VOLTS, turn ignition off and disconnect Overhead Traveler Information System (OTIS) module, if equipped. OTIS is located at center of roof, above visors.
  5. Turn ignition on. If DRB-II does not display BUS SHORT TO 5 VOLTS, replace OTIS. If DRB-II displays BUS SHORT TO 5 VOLTS, turn ignition off and disconnect Auto Temperature Control (ATC) head, if equipped.
  6. Turn ignition on. If DRB-II does not display BUS SHORT TO 5 VOLTS, replace ATC. If DRB-II displays BUS SHORT TO 5 VOLTS, turn ignition off and disconnect Mechanical Instrument Cluster (MIC).
  7. Turn ignition on. If DRB-II does not display BUS SHORT TO 5 VOLTS, replace MIC. If DRB-II displays BUS SHORT TO 5 VOLTS, turn ignition off and disconnect Body Control Module (BCM). BCM is located behind right kick panel.
  8. Turn ignition on. If DRB-II does not display BUS SHORT TO 5 VOLTS, go to TEST 8C. If DRB-II displays BUS SHORT TO 5 VOLTS, turn ignition off.
    CAUTION: Ensure ignition is off for 5 minutes before proceeding.
  9. Disconnect Passenger Air Bag System Diagnostic Module (PASDM). PASDM is located under center of instrument panel. Turn ignition on. If DRB-II does not display BUS SHORT TO 5 VOLTS, replace PASDM. Perform VERIFICATION PROCEDURE VER-1.
  10. If DRB-II displays BUS SHORT TO 5 VOLTS, use an external voltmeter to check voltage between BCM Bone connector terminal No. 8, CCD bus positive circuit (Violet/Brown wire), and ground. If voltage is more than 4 volts, repair short to voltage in Violet/Brown wire. Perform VERIFICATION PROCEDURE VER-1.
  11. If voltage is less than 4 volts, check voltage between BCM Bone connector terminal No. 7, CCD bus negative circuit (White/Black wire), and ground.
  12. If voltage is more than 4 volts, repair short to voltage in White/Black wire. Perform VERIFICATION PROCEDURE VER-1. If voltage is less than 4 volts, replace DRB-II cable or cartridge as necessary. Perform VERIFICATION PROCEDURE VER-1.
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