B1637

B1637-RIGHT HI BEAM CONTROL CIRCUIT LOW

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the high beam headlamps active.

- Set Condition:
When the Totally Integrated Power Module (TIPM) detects a low condition.





Diagnostic Test

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

Does the scan tool display DTC: 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. ATTEMPT TO SET THE OPPOSITE DTC
1. Turn the ignition off.
2. Disconnect the Right Front Lamp Assembly C4 harness connector.
3. Turn the ignition on.
4. With the scan tool, read DTCs.

Does the scan tool display DTC: B1638-RIGHT HI BEAM CONTROL CIRCUIT HIGH?

Yes

- Replace the Right High Beam Bulb.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. CHECK THE (L34) RIGHT HIGH BEAM CONTROL CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the TIPM C3 harness connector.
3. Measure the resistance between ground and the (L34) Right High Beam Control circuit.

Is the resistance above 10k Ohms?

Yes

- Go To 4

No

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

4. CHECK THE (L34) RIGHT HIGH BEAM CONTROL CIRCUIT FOR A SHORT TO THE (L910) HEADLAMP RETURN SIGNAL CIRCUIT
1. Measure the resistance between the (L34) Right High Beam Control circuit and the (L910) Headlamp Return Signal circuit.

Is the resistance above 10k Ohms?

Yes

- Replace the Totally Integrated Power Module (TIPM).
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the short between the (L34) Right High Beam Control circuit and the (L910) Headlamp Return Signal circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.