B1667

B1667-REVERSE LAMP CONTROL CIRCUIT LOW







- When Monitored:
With the ignition on.

- Set Condition:
The Front Control Module (FCM) detects a short to ground condition.





1. INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, clear all FCM DTCs.
3. Shift the transmission into reverse.
4. With the scan tool, read DTCs.

Does the scan tool display: B1667-REVERSE LAMP CONTROL CIRCUIT LOW?

Yes

- Go To 2

No

- The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK THE (L1) BACK-UP LAMP FEED CIRCUIT FOR A SHORT IN THE HARNESS




1. Turn the ignition off.
2. Disconnect the IPM C2 harness connector.
3. Measure the resistance between ground and the (L1) Back-up Lamp circuits.

Are the resistances below 5.0 Ohms?

Yes

- Repair the short to ground in the appropriate (L1) Back-up Lamp circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. CHECK (L1) BACK-UP LAMP FEED CIRCUIT IN IPM FOR A SHORT TO GROUND




1. Disconnect the Front Control Module (FCM) from the IPM 49-way connector.
2. Reconnect the IPM C2 harness connector.
3. Measure the resistance of the (L1) Back-up Lamp circuit between ground and the IPM 49-way connector.

Is the resistance below 5.0 Ohms?

Yes

- Replace the Integrated Power Module (IPM).
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Front Control Module (FCM).
- Perform the BODY VERIFICATION TEST. Body Verification Test.