FCM-Wiper On-Off Relay Output Circuit Open

FCM-WIPER ON-OFF RELAY OUTPUT CIRCUIT OPEN

FCM - Wiper On-Off Relay Output Circuit Open:

WHEN MONITORED
With the ignition on

SET CONDITION
The FCM detects an open condition on the BUS

POSSIBLE CAUSES
- Wiper on/off relay
- Front control module
- Power distribution center

1. INTERMITTENT CONDITION




Turn the ignition on.
With the DRBIII(R), clear all FCM DTC's.
Turn the Wipers ON then OFF.
With the DRBIII(R), read the DTC information.

Q: Does the DRBIII(R) read: Wiper ON-OFF Relay 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. WIPER ON/OFF RELAY




Turn the ignition off.
Install a substitute relay in place of the Wiper On/Off Relay.
Turn the ignition on.
With the DRBIII(R), read DTCs.

Q: Does the DRBIII(R) display: Wiper On/Off Relay Output Circuit Open?

YES: Go To 3
NO: Replace the Wiper On/Off Relay. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

3. POWER DISTRIBUTION CENTER
Turn the ignition off.
Remove the Wiper On/Off Relay from the IPM.
Remove the FCM from the IPM.
Measure the resistance of the Wiper On/Off Control circuit in the IPM.

Q: Is the resistance above 5.0 ohms?

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