B1668
B1668-REVERSE LAMP CONTROL CIRCUIT HIGHB1668-Reverse Lamp Control Circuit High:
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 CONDITION
Turn the ignition on.
Clear all FCM DTC's.
Shift the transmission into reverse.
With the scan tool, read DTC's.
Q: 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. Body Verification Test
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.
Q: 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. Body Verification Test
NO: Replace the IPM.
Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test