907F

907F-REAR WINDOW HEATER 2 CONTROL CIRCUIT LOW





For a complete wiring diagram, Refer to the Wiring Information Electrical Diagrams

- When Monitored:
Continuously.

- Set Condition:
When no Voltage is detected on the Heated Rear Window 2 Relay Control circuit by the Body Control Module (BCM).





1. ERASE AND ATTEMPT TO RESET DTC
1. Turn the ignition on.
2. With the scan tool, erase BCM DTCs.
3. Start the engine.
4. Operate the rear defogger.
5. With the scan tool, read BCM DTCs.

Does the scan tool display 907F-REAR WINDOW HEATER 2 CONTROL CIRCUIT LOW?

Yes

- Go To 2

No

- The condition that caused this symptom is currently not present. Inspect the related wiring harness for a possible intermittent condition.
- Perform BODY VERIFICATION TEST. Verification Tests.

2. CHECK REAR WINDOW DEFOGGER FUSE
1. Check rear window defogger fuse.

Is the fuse open?

Yes

- Check for a short to ground in the Fused B+ circuit. Replace the fuse.
- Perform BODY VERIFICATION TEST. Verification Tests.

No

- Go To 3

3. INSTALL KNOWN GOOD RELAY
1. Turn the ignition off.
2. Substitute the original Rear Window Defogger 2 Relay with a known good relay.
3. Turn the ignition on.
4. With the scan tool, erase BCM DTCs.
5. Start the engine.
6. Operate the rear defogger.
7. With the scan tool, read BCM DTCs.

Does the scan tool display 907F-REAR WINDOW HEATER 2 CONTROL CIRCUIT LOW?

Yes

- Go To 4

No

- Replace the original Rear Window Defogger 2 Relay.
- Perform BODY VERIFICATION TEST. Verification Tests.

4. HEATED REAR WINDOW 2 RELAY CONTROL CIRCUIT SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the Rear Window Defogger 2 Relay.
3. Disconnect the Body Control Module C9 connector.
4. Measure the resistance of the Heated Rear Window 2 Relay Control circuit at the Rear Window Defogger 2 Relay connector to ground.

Is the resistance below 5.0 ohms?

Yes

- Repair the Heated Rear Window 2 Relay Control circuit for a short to ground.
- Perform BODY VERIFICATION TEST. Verification Tests.

No

- Go To 5

5. HEATED REAR WINDOW 2 RELAY CONTROL CIRCUIT OPEN
1. Measure the resistance of the Heated Rear Window 2 Relay Control circuit between the BCM connector and the Rear Window Defogger 2 Relay connector.

Is the resistance below 5.0 ohms?

Yes

- Replace the Body Control Module (BCM).
- Perform BODY VERIFICATION TEST. Verification Tests.

No

- Repair the Heated Rear Window 2 Relay Control circuit for an open.
- Perform BODY VERIFICATION TEST. Verification Tests.