Malfunction Indicator Lamp (MIL), Checking

Malfunction Indicator Lamp (MIL)

Functional Check:
- Switch ignition on:
- The MIL must light-up.

If the MIL does not light-up with ignition switched on:
- Check MIL lamp wiring/MIL lamp bulb using wiring diagram.

If OK:
- Check instrument cluster/ECM, and replace if necessary.
- Check DTC memory, if necessary, repair any malfunctions and then erase DTC memory DTC Memory Checking and Erasing
- Display readiness code. If DTC memory has been erased or engine control module was disconnected from permanent positive, readiness code must be generated again.
Monitors, Trips, Drive Cycles and Readiness Codes
Monitors, Trips, Drive Cycles and Readiness Codes.

If the Malfunction Indicator Lamp (MIL) lights up with the ignition switched on, continue check as follows:
- Start engine and run at idle.

The Malfunction Indicator Lamp (MIL) must go out after a few seconds.

If the Malfunction Indicator Lamp (MIL) does not go out:
- Check DTC memory. If necessary, repair any malfunctions and erase DTC memoryDTC Memory Checking and Erasing.

If no DTCs are stored:
- Check Malfunction Indicator Lamp (MIL) wiring using wiring diagram.

If OK:
- Check instrument cluster/ECM, and replace if necessary.
- Check DTC memory, if necessary, repair any malfunctions and then erase DTC memory DTC Memory Checking and Erasing.
- Display readiness code. If DTC memory has been erased or engine control module was disconnected from permanent positive, readiness code must be generated again.
Monitors, Trips, Drive Cycles and Readiness Codes
Monitors, Trips, Drive Cycles and Readiness Codes.