Check Engine Indicator Not Operating Properly
- Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with Powertrain Control Module (PCM). If communication was established, go to next step. If communication was not established, repair communication concern. See NO RESPONSE FROM POWERTRAIN CONTROL MODULE (PCI BUS) under COMMUNICATIONS.
- Using scan tool, retrieve Powertrain Control Module (PCM) DTCs. If no DTCs exists, replace instrument cluster. If any DTCs exist, repair powertrain concern as necessary. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.