B1638

B1638-RIGHT HI BEAM CONTROL CIRCUIT HIGH







- When Monitored:
With the Headlamps activated.

- Set Condition:
When the TIPM detects a high condition.





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

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

Yes

- Go To 2

No

- The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. RIGHT LOW BEAM BULB
1. Turn the ignition off.
2. Inspect the Right High Beam Bulb Assembly.

Is the inoperative bulb OK?

Yes

- Go To 3

No

- Replace the Inoperative bulb.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. (L34) HIGH BEAM CONTROL CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the TIPM C4 harness connector.
3. Disconnect the Right HIGHBEAM Lamp harness connector.
4. Measure the resistance of the (L34) High Beam Control circuit.

Is the resistance above 5.0 Ohms?

Yes

- Repair the (L34) High Beam Control circuit for an open condition.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. (L34) HIGH BEAM CONTROL CIRCUIT SHORT TO VOLTAGE




1. Turn the ignition off.
2. Disconnect the TIPM C4 harness connector.
3. Disconnect the Right HIGHBEAM Lamp harness connector.
4. Turn the ignition on.
5. Measure for voltage on the (L34) High Beam Control circuit.

Is the voltage above 10.0 volts?

Yes

- Repair the (L34) High Beam Control circuit for a short to voltage condition.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

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