B1664

B1664-REAR FOG LAMP CONTROL CIRCUIT HIGH

For a complete wiring diagram refer to Diagrams/Electrical.

- When Monitored:

Continuously.

- Set Condition:

The Totally Integrated Power Module (TIPM) Detects a HIGH condition.





Diagnostic Test

1.INTERMITTENT CONDITION

Turn the ignition on.

With the scan tool, clear all DTC's.

Turn the Rear Fog Lamps on.

With the scan tool, read DTC's.

Does the scan tool display active: B1664-REAR FOG LAMP 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 - VER 1. Body Verification Test

2.LEFT AND RIGHT REAR FOG LAMP BULBS

Turn the ignition off.

Remove the Left and Right Fog Lamp Bulbs.

Inspect the Left and Right Fog Lamp Bulbs.

Are the inoperative bulbs OK?

Yes

- Go To 3

No

- Replace the Inoperative bulb(s).
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

3.(L239) REAR FOG LAMP CONTROL CIRCUIT OPEN

Disconnect the TIPM C6 harness connector.

Disconnect the Left and Right Rear Fog Lamp harness connectors.

Measure the resistance of the (L239) Rear Fog Lamp Control circuit between the Left and Right Rear Fog Lamp harness connectors and the TIPM C6 harness connector.

Is the resistance below 10.0 ohms?

Yes

- Go To 4

No

- Repair the (L239) Rear Fog Lamp Control circuit for an open.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

4.(L239) REAR FOG LAMP CONTROL CIRCUIT SHORTED TO VOLTAGE

Turn the ignition on.

Measure for voltage on the (L239) Rear Fog Lamp Control circuit.

Is there any voltage present?

Yes

- Repair the (L239) Rear Fog Lamp Control circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Replace the Totally Integrated Power Module (TIPM).
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test