Diesel Data: Automotive Repair

B1660






B1660-FRONT FOG LAMP CONTROL CIRCUIT HIGH





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

- When Monitored:
With the Front Fog Lamps activated.

- Set Condition:
When the TIPM detects a high condition.





1. INTERMITTENT CONDITION

NOTE: Prior to testing, check and inspect that all applicable fuses are functional and working properly.

1. Turn the ignition on.
2. With the scan tool, clear all TIPM DTCs.
3. Actuate the Front Fog Lamps.
4. With the scan tool, read the DTC information.

Does the scan tool read: B1660-FRONT FOG LAMP CONTROL CIRCUIT HIGH?

Yes

- Go To 2

No

- The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. TOTALLY INTEGRATED POWER MODULE




1. Turn the ignition off.
2. Measure the voltage of the (L89) Front Fog Lamp Control Output circuit and ground.

Is the voltage above 1.0 volts?

Yes

- Repair the (L89) Front Fog Lamp Control Output circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

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