MIL Operation

MIL is located on instrument panel and is displayed as CHECK ENGINE light.

MIL Function

• The MIL informs the driver that a malfunction has occurred and the vehicle should be taken in for service as soon as possible.
• The MIL illuminates during a bulb test and a system test.
• A DTC will be stored if a MIL is requested by the diagnostic.

MIL Illumination

• The MIL will illuminate with ignition ON and the engine not running.
• The MIL will turn OFF when the engine is started.
• The MIL will remain ON if the self-diagnostic system has detected a malfunction.
• The MIL may turn OFF if the malfunction is not present.
• If the MIL is illuminated and then the engine stalls, the MIL will remain illuminated so long as the ignition switch is ON.
• If the MIL is not illuminated and the engine stalls, the MIL will not illuminate until the ignition switch is cycled OFF, then ON.

Perform the Diagnostic System Check - Engine Controls, when the following conditions are present:

• The MIL does not turn ON when the ignition switch is turned to the RUN position. See above for MIL operation.
• The MIL remains ON while the engine is running.
• The MIL is flashing while the engine is running.
• A driveability symptom is determined.