B1668

B1668-REVERSE LAMP CONTROL CIRCUIT HIGH

For a complete wiring diagram consult Diagrams/Electrical.


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







Diagnostic Test


1. TEST FOR INTERMITTENT CONDITION
Turn the ignition on, engine off.
Clear all TIPM DTC's
With foot on brake, place the gear selector into reverse.
With the scan tool, read DTC's.
Does the scan tool read: B1668-REVERSE LAMP CONTROL CIRCUIT HIGH?

Yes


- Go to 2


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. BACKUP LAMP
Turn the ignition off.
Inspect the Backup 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. TOTALLY INTEGRATED POWER MODULE
Turn the ignition off.
Disconnect the TIPM C3 harness connector.
Measure the voltage between (L1) Backup Lamps Control circuit and ground.
Is there any voltage present?

Yes


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


No


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