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Test 6A - Bus Short To Ground

NOTE: For connector terminal identification see CONNECTOR IDENTIFICATION  . For wiring diagrams, see WIRING DIAGRAMS  . Perform, after each repair, VERIFICATION TEST VER-1A - VERIFICATION PROCEDURE  .
CAUTION: Always turn ignition off prior to disconnecting any module connector.
  1. Turn ignition off. Disconnect Powertrain Control Module (PCM). PCM is mounted to right inner fender. Turn ignition on. If scan tool does not display BUS SHORT TO GROUND, replace PCM. If scan tool displays BUS SHORT TO GROUND, go to next step.
  2. Turn ignition off. Disconnect anti-lock brake controller module. Controller module is mounted to top of ABS hydraulic unit. Turn ignition on. If scan tool does not display BUS SHORT TO GROUND, replace anti-lock brake controller module. If scan tool displays BUS SHORT TO GROUND, go to next step.
  3. Turn ignition off. Disconnect instrument cluster. Turn ignition on. If scan tool does not display BUS SHORT TO GROUND, replace instrument cluster circuit board. If scan tool displays BUS SHORT TO GROUND, go to next step.
  4. Turn ignition off. Disconnect compass mini-trip computer. Turn ignition on. If scan tool does not display BUS SHORT TO GROUND, replace compass mini-trip computer. If scan tool displays BUS SHORT TO GROUND, go to next step.
  5. Turn ignition off and wait 2 minutes. Disconnect Air Bag Control Module (ACM). ACM is located under front of center console. Turn ignition on. If scan tool does not display BUS SHORT TO GROUND, replace ACM. If scan tool displays BUS SHORT TO GROUND, go to next step.
  6. Turn ignition off. Disconnect Central Timer Module (CTM). CTM is located behind right corner of dash, beside glove box. Turn ignition on. If scan tool does not display BUS SHORT TO GROUND, replace CTM. If scan tool displays BUS SHORT TO GROUND, go to next step.
  7. Disconnect scan tool from DLC. Using external ohmmeter, measure resistance between ground and terminal No. 3 (Violet/Brown wire) on DLC connector. If resistance is less than 700 ohms, repair Violet/Brown wire for short to ground. If resistance is 700 ohms or greater, go to next step.
  8. Measure resistance between ground and terminal No. 11 (White/Black wire) on DLC connector. If resistance is less than 700 ohms, repair White/Dark Green wire for short to ground. If resistance is 700 ohms or greater, replace scan tool cable or scan tool as necessary.
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