Malfunction Indicator Lamp (MIL), Checking

Malfunction Indicator Lamp (MIL), Checking

- Switch on ignition:
Malfunction Indicator Lamp (MIL) must light-up.

If the Malfunction Indicator Lamp (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. Refer to "DTC Memory, Checking And Erasing" under "Computers and Control Systems/Testing and Inspection/Procedures/Displaying, Reading and Erasing Trouble Codes/With Manufacturers Scan Tool/", Testing and Inspection
- Read-out the readiness code. If the DTC memory has been erased or the engine control module was disconnected from permanent positive, the readiness code must be generated again.
Refer to "Displaying Readiness Code" under "Computers and Control Systems/Testing and Inspection/Procedures/Monitors Trips and/or Drive Cycle/", Testing and Inspection
Refer to "Generating Readiness Code" under "Computers and Control Systems/Testing and Inspection/Procedures/Monitors Trips and/or Drive Cycle/", Testing and Inspection


If the MIL lights-up with ignition switched on, continue check as follows:
- Start engine and run at idle speed:
The MIL must go out after a few seconds.

If the MIL does not go out:
- Check DTC memory, if necessary, repair any malfunctions and then erase DTC memory. Refer to "DTC Memory, Checking And Erasing" under "Computers and Control Systems//Testing and Inspection/Procedures/Displaying, Reading and Erasing Trouble Codes/With Manufacturers Scan Tool/", Testing and Inspection


If no DTC is stored:
- Check MIL lamp 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. Refer to "DTC Memory, Checking And Erasing" under "Computers and Control Systems//Testing and Inspection/Procedures/Displaying, Reading and Erasing Trouble Codes/With Manufacturers Scan Tool/", Testing and Inspection
- Read-out the readiness code. If the DTC memory has been erased or the engine control module was disconnected from permanent positive, the readiness code must be generated again.
Refer to "Displaying Readiness Code" under "Computers and Control Systems/Testing and Inspection/Procedures/Monitors Trips and/or Drive Cycle/", Testing and Inspection
Refer to "Generating Readiness Code" under "Computers and Control Systems/Testing and Inspection/Procedures/Monitors Trips and/or Drive Cycle/", Testing and Inspection