P0650

DTC P0650

DTC DESCRIPTOR

DTC P0650
Malfunction Indicator Lamp (MIL) Control Circuit

DIAGNOSTIC FAULT INFORMATION

IMPORTANT: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Testing and Inspection






CIRCUIT/SYSTEM DESCRIPTION
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.

CONDITIONS FOR RUNNING THE DTC
DTC P0650 runs continuously when the ignition is ON.

CONDITIONS FOR SETTING THE DTC
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.

ACTION TAKEN WHEN THE DTC SETS
- The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
- The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

CONDITIONS FOR CLEARING THE MIL/DTC
- The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Clear the MIL and the DTC with a scan tool.

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

CIRCUIT/SYSTEM TESTING
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.

REPAIR INSTRUCTIONS

IMPORTANT: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure.
- Refer to Control Module References for ECM replacement, setup, and programming. Programming and Relearning
- Refer to Instrument Panel Cluster (IPC) Replacement. Verification Tests