On Board Diagnosis Function

DIAGNOSIS SYSTEM (ECM)

On Board Diagnosis Function


ON BOARD DIAGNOSIS ITEM

The on board diagnostic system has the following functions.






BULB CHECK MODE

Description
This function allows damage inspection in the MIL bulb (blown, open circuit, etc.).
Operation Procedure
1.Turn ignition switch ON.
2.The MIL on the instrument panel should stay ON.
If it remains OFF, check MIL circuit. Testing and Inspection.

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. Testing and Inspection.
3.Perform "INSPECTION MODE 5". Description.
4.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).