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Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install a scan tool. Does the scan tool power up? If so, go to next step. If not, diagnose scan tool concern. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
  2. Turn ignition switch to ON position. Attempt to establish communication with the DIM and the RIM. Does the scan tool communicate with the DIM and the RIM? If so, go to next step. If not, diagnose body control system. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
    NOTE: If vehicle is a 2001 model year, go to step  4 . If vehicle is a 2002 model year, go to next step.
    3. NOTE: The engine may start during the following step. Turn engine off as soon as you have observed the CRANK POWER mode.
  3. Access the Class 2 Power Mode in the Diagnostic Circuit Check on the scan tool. Rotate the ignition switch through all positions while observing the ignition switch power mode parameter. Does the ignition switch parameter reading match the ignition switch position for all switch positions? If so, go to next step. If not, check for power mode mismatch concern. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
  4. Select the display DTCs function on the scan tool for the DIM and the RIM. Does the scan tool display any DTCs for the DIM or the RIM? If so, go to next step. If not, attempt diagnosis by symptom. See SYMPTOM TESTS  .
  5. Does the scan tool display any DTCs which begin with a "U"? If so, diagnose body control system. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. If not, go to next step.
  6. Does the scan tool display DTC B1000, B1004, B1007, B1009 or B1010? If so, diagnose body control system. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. If not, go to next step.
  7. Does the scan tool display DTC B1327? If so, diagnose charging system. See appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS. If not, attempt diagnosis by symptom. See SYMPTOM TESTS  .
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