Malfunction Indicator Lamp (MIL) Inoperative

CIRCUIT DESCRIPTION
The battery positive voltage is supplied directly to the Malfunction Indicator Lamp (MIL). The Powertrain Control Module (PCM) turns the MIL ON by grounding the MIL control circuit. When the ignition is ON and the engine is OFF, the MIL should be steady.

MIL OPERATION
The MIL is located on the instrument panel.

MIL FUNCTION
^ The MIL informs the driver that a malfunction has occurred. The vehicle should be serviced as soon as possible.
^ The MIL illuminates during a bulb test and during a system test.
^ A DTC will be stored if the diagnostic requests a MIL.

MIL ILLUMINATION
^ The MIL will illuminate with ignition switch ON, and with the engine not running.
^ The MIL will turn OFF when the engine is started.
^ The MIL will remain ON if the self-diagnostic system detects 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 if 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.

DIAGNOSTIC AIDS
If the problem is intermittent, refer to Intermittent Conditions. Intermittent Conditions

TEST DESCRIPTION

Steps 1-14:

The numbers below refer to the step numbers on the diagnostic table.
3. This step determines if the condition is with the MIL control circuit or the PCM.
4. This step determines if a voltage is being applied to the control circuit.