B16CF-15

B16CF-15-LEFT DRL LAMP CONTROL - CIRCUIT SHORT TO BATTERY OR OPEN





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

Theory of Operation

The BCM provides a voltage output through the front daytime running lamp driver circuits to power the Daytime Running Lamp (DRL) Light Emitting Diodes (LED)s, which are located in the Front Lamp unit. A ground path for the lamps is present through the harness to the body sheet metal. For additional information on the Daytime Running Lamps operation, Exterior Lamps - Operation.

- When Monitored:
With the DRL active.

- Set Condition:
When the Body Control Module (BCM) detects a high condition on the (L58) Left Daytime Running Lamp Driver circuit for more than five seconds.





1. INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, clear all DTCs.
3. Cycle the ignition from off to on.
4. With the brakes firmly applied, shift the gear selector into Drive.
5. Wait 10 seconds.
6. With the scan tool, read DTCs.

Does the scan tool display DTC: B16CF-15-LEFT DRL LAMP 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 (L58) LEFT DAYTIME RUNNING LAMP DRIVER CIRCUIT FOR A SHORT TO VOLTAGE IN THE HARNESS




1. Shift the gear selector into Park.
2. Turn the ignition off.
3. Disconnect the Left 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 (L58) Left Daytime Running Lamp Driver circuit.

Is there any voltage present?

Yes

- Repair the short to voltage in the (L58) Left Daytime Running Lamp Driver circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. CHECK THE (L58) LEFT DAYTIME RUNNING LAMP DRIVER CIRCUIT FOR AN OPEN IN THE HARNESS




1. Turn the ignition off.
2. Measure the resistance of the (L58) Left Daytime Running Lamp Driver circuit between the Left 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 (L58) Left Daytime Running Lamp Driver circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. CHECK THE BCM FOR CORRECT OPERATION




1. Reconnect the BCM D harness connector.
2. Connect a 12-volt test light between the (L58) Left Daytime Running Lamp Driver circuit and ground at the Left Front Lamp Assembly C1 harness connector.
3. Turn the ignition on.
4. With the brakes firmly applied, shift the gear selector into Drive.

Does the test light illuminate?

Yes

- Replace the Left Front Lamp Unit. Front Lamp Unit - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

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