B1668

B1668-REVERSE LAMP CONTROL CIRCUIT HIGH





For a complete wiring diagram Refer to Diagrams/Electrical.

- When Monitored:
- Continuously
- Set Condition:
- When the Front Control Module detects a short to battery on the Control circuit.





Diagnostic Test

1.TEST FOR INTERMITTENT CONDITION

Turn the ignition on.

Clear all FCM DTC's

Turn the Right Turn Signal on.

With the scan tool, read DTC's.

Does the scan tool read: B1668-REVERSE LAMP CONTROL CIRCUIT HIGH?

Yes

- Go To2

No

- The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

2.REVERSE LAMP

Turn the ignition off.

Inspect the Reverse Lamp assembly for an open condition.

Is the inoperative bulb OK?

Yes

- Go To 3

No

- Replace the inoperative bulb.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

3.L1 BACKUP LAMPS CONTROL CIRCUIT





Turn the ignition off.

Disconnect the PDM connector from the FCM.

Measure the resistance of the (L1) Backup Lamps Control circuit between the PDM and the FCM.

Is the resistance above 5.0 ohms?

Yes

- Repair the (L1) Backup Lamps Control circuit.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 4

4. FRONT CONTROL MODULE

Turn the ignition off.

Disconnect the Front Control Module from the PDM 49 way connector.

Measure the voltage between (L1) Backup Lamps Control circuit and ground.

Is there any voltage present?

Yes

- Replace the Power Distribution Center.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Replace the Front Control Module.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test