Self-Diagnostic System: Notes

PCM is equipped with a self-diagnostic system, which detects system failures or abnormalities. When malfunction occurs, Malfunction Indicator Light (MIL) on instrument panel is turned on.

By analyzing various input signals, PCM detects system malfunctions related to various operating parameter sensors. PCM stores trouble codes associated with the detected failure until the diagnostic system is cleared. For further information, see appropriate TESTS W/CODES article.