FCM-Left Stop Lamp Output Circuit Open

FCM-LEFT STOP LAMP OUTPUT CIRCUIT OPEN

FCM - Left Stop Lamp Output Circuit Open:

WHEN MONITORED
With the ignition on

SET CONDITION
The FCM detects an OPEN condition

POSSIBLE CAUSES
- Left brake lamp feed circuit open
- Power distribution center
- Front control module

1. INTERMITTENT CONDITION




Turn the ignition on.
With the DRBIII(R), clear all FCM DTC's.
Actuate the Stop Lamps.
With the DRBIII(R), read the DTC information.

Q: Does the DRBIII(R) read: Left Stop Lamp Output Circuit Open?

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 BODY VERIFICATION TEST - VER 1. Body Verification Test

2. LEFT BRAKE LAMP FEED CIRCUIT OPEN




Turn the ignition off.
Disconnect the IPM C3 harness connector.
Measure the resistance of the Left Brake Lamp Feed circuit.

Q: Is the resistance above 5.0 ohms?

YES: Repair the Left Brake Lamp Feed circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 3

3. FRONT CONTROL MODULE
Turn the ignition off
Disconnect the FCM from the IPM.
Disconnect the IPM C3 harness connector.
Measure the resistance of the Left Brake Lamp Feed circuit.

Q: Is the resistance above 5.0 ohms?

YES: Replace the Power Distribution Center. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Replace the Front Control Module. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test