B1634

B1634-LEFT HI BEAM CONTROL CIRCUIT HIGH

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

- When Monitored:
Continuously.

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





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

Does the scan tool display active: B1634-LEFT 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. Body Verification Test.

2. CHECK (L911) LEFT HEADLAMP RETURN SIGNAL
1. Turn the ignition off.
2. Disconnect the Left High Beam Lamp harness connector.
3. With a 12-volt test light connected to 12-volts, probe the (L911) left headlamp return signal circuit.

Does the test light illuminate brightly on each ground circuit?

Yes

- Go To 4

No

- Go To 3

3. (L911) LEFT HEADLAMP RETURN SIGNAL
1. Measure the resistance of the (L911) left headlamp return signal circuit at the Left High Beam harness connector.

Is the resistance below 10.0 Ohms?

Yes

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

No

- Repair the (L911) left headlamp return signal circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. CHECK (L33) LEFT HIGH BEAM CONTROL CIRCUIT
1. Turn the ignition on.
2. With a 12-volt test light connected to ground, check the (L33) Left 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. Body Verification Test.

No

- Go To 5

5. (L33) LEFT HIGH BEAM CONTROL CIRCUIT OPEN
1. Turn the ignition off.
2. Disconnect the TIPM C3 harness connector.
3. Measure the resistance of the (L33) Left High Beam Control Circuit between the Left Headlamp harness connector and the TIPM C3 harness connector.

Is the resistance below 10.0 Ohms?

Yes

- Go To 6

No

- Repair the (L33) Left High Beam Control circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

6. (L33) LEFT HIGH BEAM CONTROL CIRCUIT SHORT TO VOLTAGE
1. Turn the ignition on.
2. Measure for voltage on the (L33) Left High Beam Control circuit.

Is there any voltage present?

Yes

- Repair the (L33) Left High Beam Control circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

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