B231C
B231C-REAR WIPER MOTOR CONTROL CIRCUIT HIGHB231C-Rear Wiper Motor Control Circuit High:
WHEN MONITORED
SET CONDITION
POSSIBLE CAUSES
- Wiper motor
- (Z914) ground circuit
- Module power distribution
- (W13) rear wiper control circuit low
- Front control module
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.
DIAGNOSTIC TEST
1. INTERMITTENT CONDITION
Turn the ignition on.
With the Scan Tool, clear all FCM DTC's.
Turn the Rear Wipers on.
With the Scan Tool, read the Rear Wiper DTC's.
Q: Does the Scan Tool read: B231C-REAR WIPER MOTOR CONTROL CIRCUIT HIGH?
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 - VER 1. Body Verification Test
2. WIPER MOTOR REAR
Turn the ignition off.
Disconnect the Rear Wiper Motor connector.
Measure the internal resistance of the Wiper Motor between cavity 1 and 2 of the Motor.
Q: Is the resistance above 5.0 ohms?
YES: Replace the Rear Wiper Motor. Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 3
3. Z914 WIPER MOTOR GROUND CIRCUIT
Turn the ignition off.
Disconnect the Rear Wiper Motor connector.
Measure the resistance between ground and the (Z914) Rear Wiper Motor ground circuit.
Q: Is the resistance above 5.0 ohms?
YES: Repair the (Z914) Rear Wiper Motor Ground circuit for a short condition. Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 4
4. W13 MOTOR CONTROL CIRCUIT
Turn the ignition off.
Disconnect the Rear Wiper Motor connector.
Disconnect the Module Power Distribution C2 connector.
Measure the resistance of the wiper Motor Control circuit.
Q: Is the resistance above 5.0 ohms?
YES: Repair the (W13) Wiper Motor Control circuit. Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 5
5. FRONT CONTROL MODULE
Turn the ignition off.
Disconnect the FCM from the PDC.
Disconnect the Module Power Distribution.
Measure the internal resistance of the PDC (W13) Wiper Motor Control circuit.
Q: Is the resistance above 5.0 ohms?
YES: Replace the Module Power Distribution. Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Replace the Front Control Module. Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test