The Malfunction Indicator Lamp (MIL) is located on the instrument panel. The lamp is connected to the PCM and will alert the driver to certain malfunctions within the EEC-V system. When the lamp is illuminated, the PCM has detected a fault and stored an DTC in memory.
The light will stay illuminated as long as the fault is present. Should the fault self-correct, the MIL will extinguish but the stored code will remain in memory.
Under normal operating conditions, the MIL should illuminate briefly when the ignition key is turned ON . This is commonly known as a prove-out. As soon as the PCM receives a signal that the engine is cranking, the lamp should extinguish. The lamp should remain extinguished during the normal operating cycle.