Diagnostic Modes

Self-diagnostic system can detect engine control system malfunctions and store related trouble codes. Trouble codes, including intermittent codes, are stored in ECM memory and are available for retrieval unless codes have been cleared.

Self-diagnostic system uses MIL, located in instrument panel, or dual Light Emitting Diodes (LED), located on ECM. See ECM LOCATIONS table. For system application, see SELF-DIAGNOSTIC SYSTEM .