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Diagnostic System Check

WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Did you review DESCRIPTION & OPERATION ? If so, go to next step. If not, go to DESCRIPTION & OPERATION .
  2. Install a scan tool. Does the scan tool power up? If so, go to next step. If not, see SCAN TOOL DOES NOT POWER UP in appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
  3. Turn the ignition ON, with the engine Off. Attempt to establish communication with the Powertrain Control Module (PCM). Does the scan tool communicate with the PCM? If so, go to next step. If not, see SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE in appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
  4. Select the PCM display DTCs function on the scan tool. Does the scan tool display any DTCs? If so, go to next step. If not, go to SYMPTOM DIAGNOSIS  under TROUBLE SHOOTING.
  5. Does the scan tool display any DTCs which begin with a "U"? If so, see SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE in appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. If not, go to next step.
  6. Does the scan tool display any DTCs which begin with a "P" that are associated with the HVAC system? If so, go to DIAGNOSTIC TESTS . If not, see DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
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