Engine Malfunction Indicator Light Not Operating Properly

NOTE: After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with Powertrain Control Module (PCM). If scan tool communicates with PCM, go to next step. If scan tool does not communicate with PCM established, perform NO RESPONSE FROM POWERTRAIN CONTROL MODULE (PCI BUS) test under COMMUNICATIONS SYSTEM.
Using scan tool, retrieve Powertrain Control Module (PCM) DTCs. If any PCM DTCs exist, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If no PCM DTCs exist, replace instrument cluster.