B1638

B1638-RIGHT HIGH BEAM CONTROL CIRCUIT HIGH

For a complete wiring diagram refer to Diagrams/Electrical.

- When Monitored:

Continuously.

- Set Condition:

When the Totally Integrated Power Module (TIPM) detects a HIGH condition.





Diagnostic Test

1. INTERMITTENT CONDITION

Turn the ignition on.

With the scan tool, clear all DTC's.

Turn the Headlamps on.

With the scan tool, read DTC's.

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

Yes

- Go To 2

No

- The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

2. CHECK (L910) RIGHT HEADLAMP RETURN SIGNAL CIRCUIT

Turn the ignition off.

Disconnect the Right High Beam Lamp harness connector.

With a 12-volt test light connected to 12-volts, probe the (L910) right headlamp return signal circuit.

Does the test light illuminate brightly on each ground circuit?

Yes

- Go To 4

No

- Go To 3

3. (L910) RIGHT HEADLAMP RETURN SIGNAL CIRCUIT OPEN

Measure the resistance of the (L910) right headlamp return signal circuit at the Right High Beam harness connector.

Is the resistance below 10.0 ohms?

Yes

- Replace the Inoperative bulb.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Repair the (L910) right headlamp return signal circuit for an open.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

4. CHECK (L34) RIGHT HIGH BEAM CONTROL CIRCUIT

Turn the ignition on.

With a 12-volt test light connected to ground, check the (L34) Right High Beam Control circuit.

Does the test light illuminate brightly with the headlamps switch turned on, and shut off with the headlamps turned off?

Yes

- Replace the Inoperative bulb.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 5

5. (L34) RIGHT HIGH BEAM CONTROL CIRCUIT OPEN

Turn the ignition off.

Disconnect the TIPM C3 harness connector.

Measure the resistance of the (L34) Right High Beam Control circuit between the Right Headlamp harness connector and the TIPM C3 harness connector.

Is the resistance below 10.0 ohms?

Yes

- Go To 6

No

- Repair the (L34) Right High Beam Control circuit for an open.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

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

Turn the ignition on.

Measure for voltage on the (L34) High Beam Control circuit.

Is there any voltage present?

Yes

- Repair the (L34) High Beam Control circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Replace the Totally Integrated Power Module (TIPM).
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test