The MIL is located on the instrument panel (IP) cluster. Ignition 1 voltage is supplied directly to the malfunction indicator lamp (MIL). The engine control module (ECM) turns the MIL ON by grounding the MIL control circuit. There should be a steady MIL with the ignition ON and the engine OFF.

The ECM detects the MIL control circuit is open or shorted to ground or voltage.

DTC P0650 is a Type C DTC.

DTC P0650 is a Type C DTC.

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

1. Engine idling, command the MIL ON and OFF with a scan tool. The MIL should turn ON and OFF.
2. Observe the DTC information with a scan tool. DTC P0650 should not set.
3. If the vehicle passes the Circuit/System Verification Test, then operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records Data List.

1. If any other indicators are inoperative on the instrument panel (IP) cluster, refer to Symptoms - Instrument Panel, Gages and Console .
2. Ignition OFF, disconnect the ECM harness connector.
3. Ignition ON, the MIL should not illuminate.

⇒	If the MIL illuminates, test the MIL control circuit for a short to ground. If the circuit test normal, replace the instrument panel (IP) cluster.

4. Ignition ON, connect a 3-amp fused jumper wire between the MIL control circuit and ground. The MIL should illuminate.

⇒	If the MIL does not illuminate, test the MIL control circuit for a short to voltage or an open/high resistance. If the circuit test normal, replace the instrument panel (IP) cluster.

⇒	If the MIL illuminates, inspect for a poor connection or replace the ECM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.