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Diagnostic Procedures

WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue and 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Did you perform the Diagnostic System Check - Engine Controls? If yes, go to next step. If no, go to DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM.
  2. Is DTC P0602 set? If yes, go to next step. If no, go to step  5.
  3. Ensure that all tool connections are secure. Ensure that the programming equipment is operating correctly. Ensure that correct software/calibration package is used. Attempt to program the PCM. Does DTC P0602 reset? If yes, go to step  5. If no, go to step  6.
  4. Ensure that all tool connections are secure. Ensure that the programming equipment is operating correctly. Ensure that correct software/calibration package is used. Attempt to program the PCM. Does DTC P0602 reset? If yes, go to next step. If no, go to step  6.
  5. Replace PCM. Program replacement PCM. See PROGRAMMING . After repairs, go to next step.
  6. Using scan tool, clear DTCs. Turn ignition off for 30 seconds. Start engine. Operate vehicle within conditions for running the DTC. See CONDITIONS FOR RUNNING DTC . If DTC runs and passes, go to next step. If DTC resets, go to step  2.
  7. Using scan tool, check for any other DTCs that are set. If no other DTCs are set, system is okay. If any other DTCs are set, repair DTCs as necessary. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .
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