Malfunction Warning Mode

Description 

In this function ECM turns on or blinks MIL when it detects a malfunction in the emission control system components and/or the powertrain control components (which affect vehicle emissions) to inform the driver that a malfunction has been detected.

Operation Procedure 

1. Turn ignition switch ON.
2. Check that MIL illuminates.

   If it remains OFF, check MIL circuit. Refer to Diagnosis Procedure .

3. 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).