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.

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).