B1668-REVERSE LAMP CONTROL CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
With the ignition on.
- Set Condition:
The FCM detects an open condition.
| Possible Causes |
| (L1) BACK-UP LAMP FEED CIRCUIT SHORT TO VOLTAGE |
| IPM |
Diagnostic Test
1. TEST FOR INTERMITTENT CONDITIONTurn the ignition on.
Clear all FCM DTC's.
Shift the transmission 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 the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
2. (L1) BACK-UP LAMP FEED CIRCUIT SHORT TO VOLTAGE
Turn the ignition off.
Disconnect the IPM C2 harness connector.
Turn the ignition on.
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 - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Replace the IPM in accordance with the service information.
- Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)