B163E-15

B163E-15-FRONT RIGHT TURN LAMP 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 a communication network message from the Steering Column Control Module (SCCM) requesting turn signal lamp illumination. When this bus message is received, the BCM provides a pulsed voltage output through the front turn signal driver circuit. The front turn signal driver circuit connects to the Turn Signal Lamp. For additional information on the Turn Signal Lamps operation, Exterior Lamps - Operation.

- When Monitored:
With the turn signal active.

- Set Condition:
When the Body Control Module (BCM) detects a high condition on the (L60) Right Front Turn Signal Driver circuit.





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

Does the scan tool display DTC: B163E-15-FRONT RIGHT TURN 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 (L60) RIGHT FRONT TURN SIGNAL DRIVER CIRCUIT FOR A SHORT TO VOLTAGE IN THE HARNESS
1. Turn the Right Turn Signal off.
2. Turn the ignition off.
3. Disconnect the Right Front Lamp Assembly C1 harness connector.
4. Disconnect the BCM A harness connector.
5. Turn the ignition on.
6. Measure the voltage between ground and the (L60) Right Front Turn Signal Driver circuit.

Is there any voltage present?

Yes

- Repair the short to voltage in the (L60) Right Front Turn Signal Driver circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. CHECK THE (L60) RIGHT FRONT TURN SIGNAL DRIVER CIRCUIT FOR AN OPEN IN THE HARNESS
1. Turn the ignition off.
2. Measure the resistance of the (L60) Right Front Turn Signal Driver circuit between the Right Front Lamp Assembly C1 harness connector and the BCM A harness connector.

Is the resistance below 5.0 Ohms?

Yes

- Go To 4

No

- Repair the open in the (L60) Right Front Turn Signal 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.

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. Turn the ignition off.
2. Reconnect the BCM A harness connector.
3. Connect a 12-volt test light between the (L60) Right Front Turn Signal Driver circuit and ground at the Right Front Lamp Assembly C1 harness connector.
4. Turn the ignition on.
5. Turn the Right Turn Signal on.

Does the test light blink on and off?

Yes

- Replace the Turn Signal Bulb. 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.