Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Circuit | Short to Ground | Open | Short to Voltage | Signal Performance |
---|---|---|---|---|
MIL Voltage Supply | P0650 | P0650 | -- | -- |
MIL Control | P0650/MIL ON | P0650 | P0650 | -- |
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 is a Type B DTCs.
DTC P0650 is a Type B DTCs.
Turn ON the ignition, then command the MIL ON and OFF with a scan tool. The MIL should turn ON and OFF when commanded.
⇒ | If the MIL is still ON, test the MIL control circuit for a short to ground. |
⇒ | If the MIL control circuit tested OK and the MIL stayed ON, replace the IPC. |
⇒ | If the MIL control circuit tested OK and the MIL went out when the ECM was disconnected, replace the ECM. |
⇒ | If there is less than 12 volts, test the MIL ignition voltage circuit for an open, or a short to ground and an open fuse. |
⇒ | If there is more than one volt, test the MIL control circuit for a short to voltage. |
⇒ | If the MIL does not illuminate, test the MIL control circuit for an open or high resistance. |
⇒ | If the MIL control circuit tests OK, replace the IPC. |
⇒ | If the MIL does illuminate, but does not when commanded ON with a scan tool, replace the ECM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for ECM replacement, setup, and programming |