P0650

DTC P0650

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provide an overview of each diagnostic category.



DTC Descriptor
DTC P0650
- Malfunction Indicator Lamp (MIL) Control Circuit




Diagnostic Fault Information






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 engine control module (ECM) 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 and the ignition voltage is between 11-18 volts.


Conditions for Setting the DTC

The ECM detects that the commanded state of the MIL driver and the actual state of the control circuit do not match for 6 seconds.


Action Taken When the DTC Sets

DTC P0650 is a Type B DTC, with no MIL request.


Conditions for Clearing the MIL/DTC

DTC P0650 is a Type B DTC, with no MIL request.


Reference Information
Schematic Reference

* Engine Controls Schematics (Electrical Diagrams)
* Instrument Cluster Schematics (Instrument Cluster Diagrams)

Connector End View Reference

Component Connector End Views (Connector Views)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Diagnostic Trouble Code Descriptions)
Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information


Circuit/System Verification

1. Ignition ON, the MIL should turn ON and OFF when commanded with a scan tool.
2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.



Circuit/System Testing

1. Ignition ON, verify that the IPC warning indicators are illuminated.

• If the IPC warning indicators are not illuminated, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, replace the IPC.

2. Ignition OFF, disconnect connector X1 at the electronic ECM.
3. Ignition ON, verify that the MIL is not illuminated.

• If the MIL is illuminated inspect the MIL control circuit for a short to ground. If the circuit tests normal, replace the IPC.

4. Ignition ON, verify that the MIL illuminates with a 3A fused jumper between the MIL control circuit X1-27 and ground.

• If the MIL does not illuminate test the MIL control circuit for a short to voltage or an open/high resistance. If the circuit tests normal replace the ECM.




Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Instrument Cluster Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for ECM replacement, setup, and programming