Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provide an overview of each diagnostic category. |
DTC Descriptor
DTC P0650: Malfunction Indicator Lamp (MIL) Control CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open | Short to Voltage | Signal Performance |
|---|---|---|---|---|
MIL Voltage Supply | P0650 | P0650 | -- | -- |
MIL Control | P0650/MIL ON | P0650 | P0650 | -- |
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
| • | The ignition is in the Run or Crank position. |
| • | The ignition voltage is between 9-18 volts. |
| • | 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 5 seconds.
Action Taken When the DTC Sets
DTC P0650 is a Type B DTC.
Conditions for Clearing the MIL/DTC
DTC P0650 is a Type B DTC.
Reference Information
Schematic Reference
Connector End View Reference
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Ignition ON, the MIL should turn ON and OFF when commanded with a scan tool.
- 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
- Ignition ON, verify that the instrument panel cluster (IPC) warning indicators are illuminated.
- Ignition OFF, disconnect connector X1 at the ECM.
- Ignition ON, verify the MIL is not illuminated.
- Ignition ON, verify that the MIL illuminates with a 3A fused jumper between the MIL control circuit, ECM terminal X1-68, and ground.
| ⇒ | If the IPC warning indicators are not illuminated, test the ignition circuit for a sort to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, replace the IPC. |
| ⇒ | If the MIL is illuminated, inspect the MIL control circuit for a short to ground. If the circuit tests normal, replace the IPC. |
| ⇒ | 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 after completing the diagnostic procedure.
Control Module References for ECM replacement, setup, and programming
