B1668
B1668-REVERSE LAMP CONTROL CIRCUIT HIGHB1668 - Reverse Lamp Control Circuit High:
WHEN MONITORED
With the ignition on.
SET CONDITION
The TIPM detects an open condition.
POSSIBLE CAUSES
- (L1) Back-up lamp feed circuit short to voltage
- TIPM
Diagnostic Test
1. TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
Clear all TIPM 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 TIPM C8 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 Totally Integrated Power Module (TIPM). Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test