Operation Procedure

Turn ignition switch ON.
Check that MIL illuminates.
If it remains OFF, check MIL circuit. Refer to "Diagnosis Procedure ".
Start engine and let it idle.

For two trip detection logic diagnoses, ECM turns on MIL when it detects the same malfunction twice in the two consecutive driving cycles.
For 1st trip detection logic diagnoses, ECM turns on MIL when it detects a malfunction in one driving cycle.
ECM blinks MIL when it detects a malfunction that may damage the three way catalyst (misfire).