B1637

B1637-RIGHT HI BEAM CONTROL CIRCUIT LOW







- When Monitored:
With the High beam Headlamps active.

- Set Condition:
When the Front Control Module (FCM) detects a low condition.





1. INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, clear all FCM DTCs.
3. Turn the High beam Headlamps on.
4. With the scan tool, read the DTC information.

Does the scan tool display B1637-RIGHT HI BEAM CONTROL CIRCUIT LOW?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. (L34) RIGHT HIGH BEAM OUTPUT CIRCUIT SHORTED TO GROUND




1. Turn the ignition off.
2. Disconnect the FCM C2 harness connector.
3. Disconnect the Right Headlamp harness connector.
4. Measure the resistance between ground and the (L34) Right High beam Output circuit.

Is the resistance below 5.0 Ohms?

Yes

- Repair the short to ground in the (L34) Right High beam Output circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the FCM.
- Perform the BODY VERIFICATION TEST. Body Verification Test.