P0650

DTC P0650 MALFUNCTION INDICATOR LAMP (MIL) CONTROL CIRCUIT

Component Location:

GENERAL DESCRIPTION
The Malfunction Indicator Lamp (MIL), which is located in the instrument cluster, comes on to notify the driver that there may be a problem with the vehicle and that service is needed. Immediately after the ignition switch turns on, the malfunction indicator lamp is lit to indicate that the MIL operates normally and goes off after starting.

DTC DESCRIPTION
ECM sets DTC P0650 if the ECM detects that the MIL control line is open or short circuit to ground or battery line.

DTC Detecting Condition:

Schematic Diagram:

MONITOR DTC STATUS
1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode.
2. Press F4 (DTAL) to select DTC information from the DTCs menu.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions.




4. Read "DTC Status" parameter.
5. Is parameter displayed "History (Not Present) fault"?

NOTE:
- History (Not Present) fault : DTC occurred but has been cleared
- Present fault : DTC is occurring at present time

YES - Fault is intermittent caused by poor contact in the sensor's and/or the ECM's connector, which was repaired but ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure

NO - Go to next step as below

CONTROL CIRCUIT INSPECTION
1. Ignition "OFF".
2. Disconnect ECM connector.
3. Ignition "ON" 8 Engine "OFF".
4. Using a suitable wire, jumper the terminal 92 of the ECM harness connector to chassis ground.
5. Is MIL bulb illuminated?

YES - Go to next step as below.

NO - Remove instrument cluster and inspect MIL bulb. If it is burned out, replace bulb. If bulb is okay, locate source of open between bulb and Meter Fuse. Repair as necessary and go to "Verification of Vehicle Repair" procedure 6. Remove wire from ECM harness connector

7. Does MIL bulb go out?

YES - Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure

NO - Check for source of short to GND between bulb and ECM. Repair as necessary and go to "Verification of Vehicle Repair" procedure

VERIFICATION OF VEHICLE REPAIR
After a repair, it is essential to verify that the fault has been corrected.
1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode.
2. Press F4 (DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions.
3. Read "DTC Status" parameter.
4. Is parameter displayed "History (Not Present) fault"?

YES - System performing to specification at this time. Clear the DTC

NO - Go to the applicable troubleshooting procedure.