Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

The malfunction indicator lamp (MIL) is located on the instrument panel cluster (IPC).

The MIL informs the driver that an emission system fault has occurred and that the engine control system requires service. The control module monitors the MIL control circuit for conditions that are incorrect for the commanded states of the MIL.

DTC P0650 runs continuously when the ignition is ON.

The control module detects that the commanded state of the MIL driver and the actual state of the control circuit do not match for more than one second.

DTC P0650

DTC P0650 is Type B DTC. The ECM will stop commanding the MIL Control Circuit for the remainder of the ignition cycle

DTC P2610

DTC P0650 is Type B DTC.

DTC P0650

DTC P0650 is Type B DTC. The ECM will stop commanding the MIL Control Circuit for the remainder of the ignition cycle

DTC P2610

DTC P0650 is Type B DTC.

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Electrical Information Reference

Scan Tool Reference

Description and Operation

Engine Control Module Description

Turn ON the ignition, then command the MIL ON and OFF with a scan tool. The MIL should turn ON and OFF when commanded.

1. Disconnect the engine control module (ECM) connector that contains the MIL control circuit.
2. Jumper the MIL control circuit with a J 36169-A at the ECM connector to a good ground.
3. Turn ON the ignition with the engine OFF.

⇒	If the MIL illuminates replace the ECM.

4. Test the MIL voltage supply circuit for an open or short to ground.
5. Test the MIL control circuit for a short to voltage or a short to ground.

⇒	If the all circuits test OK replace the instrument panel cluster assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.