B1668

B1668-REVERSE LAMP CONTROL CIRCUIT HIGH





For a complete wiring diagram Refer to the Wiring Information.

- When Monitored:
With the ignition on.

- Set Condition:
The FCM detects an open condition.





1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. Clear all FCM DTC's.
3. Shift the transmission into reverse.
4. 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 the BODY VERIFICATION TEST. Body Verification Test

2. (L1) BACK-UP LAMP FEED CIRCUIT SHORT TO VOLTAGE




1. Turn the ignition off.
2. Disconnect the IPM C2 harness connector.
3. Turn the ignition on.
4. Measure the voltage on the (L1) Back-up Lamp Feed circuit.

Is the voltage greater than 10.0 volts?

Yes

- Repair the (L1) Back-up Lamp Feed circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST. Body Verification Test

No

- Replace the IPM.
- Perform the BODY VERIFICATION TEST. Body Verification Test