B162E-15

B162E-15-RIGHT LOW BEAM CONTROL - CIRCUIT SHORT TO BATTERY OR OPEN





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

Theory of Operation

The Body Control Module (BCM) receives the input from the headlamp switch requesting low beam lamp illumination. The BCM provides a voltage output through the low beam driver circuit. For additional information on the Headlamp operation, Exterior Lamps - Operation.

- When Monitored:
With the low beam headlamps active.

- Set Condition:
When the Body Control Module (BCM) detects a high condition on the (L44) Right Low Beam Driver circuit.





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

Does the scan tool display DTC: B162E-15-RIGHT LOW BEAM CONTROL - CIRCUIT SHORT TO BATTERY OR OPEN?

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. CHECK THE (L44) RIGHT LOW BEAM DRIVER CIRCUIT FOR A SHORT TO VOLTAGE IN THE HARNESS
1. Turn the Headlamps off.
2. Turn the ignition off.
3. Disconnect the Right Front Lamp Assembly C1 harness connector.
4. Disconnect the BCM D harness connector.
5. Turn the ignition on.
6. Measure the voltage between ground and the (L44) Right Low Beam Driver circuit.

Is there any voltage present?

Yes

- Repair the short to voltage in the (L44) Right Low Beam Driver circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. CHECK THE (L44) RIGHT LOW BEAM DRIVER CIRCUIT FOR AN OPEN IN THE HARNESS
1. Turn the ignition off.
2. Measure the resistance of the (L44) Right Low Beam Driver circuit between the Right Front Lamp Assembly C1 harness connector and the BCM D harness connector.

Is the resistance below 5.0 Ohms?

Yes

- Go To 4

No

- Repair the open in the (L44) Right Low Beam Driver circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. CHECK THE (Z902) GROUND CIRCUITS FOR AN OPEN IN THE HARNESS
1. Using a 12-volt test light connected to 12-volts, check the (Z902) Ground circuits at the Right Front Lamp Assembly C1 harness connector.

Does the test light illuminate brightly for each circuit?

Yes

- Go To 5

No

- Repair the open in the (Z902) Ground circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

5. CHECK THE BCM FOR CORRECT OPERATION
1. Reconnect the BCM D harness connector.
2. Connect a 12-volt test light between the (L44) Right Low Beam Driver circuit and ground at the Right Front Lamp Assembly C1 harness connector.
3. Turn the ignition on.
4. Turn the Headlamps on.

Does the test light illuminate brightly?

Yes

- Replace the Right Low Beam Bulb/Lamp. Front Lamp Unit - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Body Control Module (BCM). Body Control Module - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.