B1663

B1663-REAR FOG LAMP CONTROL CIRCUIT LOW

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

- When Monitored:
With the Rear Fog Lamps activated.

- Set Condition:
The Totally Integrated Power Module (TIPM) Detects a LOW condition.





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

Does the scan tool display active: B1663-REAR FOG LAMP CONTROL CIRCUIT LOW?

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. LEFT REAR FOG LAMP BULB
1. Turn the ignition off.
2. Disconnect the Left Rear Fog Lamp Bulb.
3. Turn the ignition on.
4. With the scan tool, read DTCs.

Does the DTC reset?

Yes

- Go To 3

No

- Replace the Left Rear Fog Lamp Bulb.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. RIGHT REAR FOG LAMP BULB
1. Turn the ignition off.
2. Disconnect the Right Rear Fog Lamp Bulb.
3. Turn the ignition on.
4. With the scan tool, read DTCs.

Does the DTC reset?

Yes

- Go To 4

No

- Replace the Right Rear Fog Lamp Bulb.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. (L239) REAR FOG LAMP CONTROL CIRCUIT SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the TIPM C6 harness connector.
3. Disconnect the Left and Right Rear Fog Lamp harness connectors.
4. Measure the resistance between ground and the (L239) Rear Fog Lamp Control circuit.

Is the resistance above 10k Ohms?

Yes

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

No

- Repair the (L239) Rear Fog Lamp Control circuit for a short to ground.
- Perform the BODY VERIFICATION TEST. Body Verification Test.