FCM-Wiper Speed Relay Output Circuit High

FCM-WIPER SPEED RELAY OUTPUT CIRCUIT HIGH

FCM - Wiper Speed Relay Output Circuit High:

WHEN MONITORED
With the ignition on

SET CONDITION
The FCM detects a HIGH condition the BUS

POSSIBLE CAUSES
- Wiper high/low relay
- Front control module
- Power distribution center

1. INTERMITTENT CONDITION




Turn the ignition on.
With the DRBIII(R), clear all FCM DTC's.
Actuate the Wipers in all speed positions.
With the DRBIII(R), read the DTC information.

Q: Does the DRBIII(R) read: Wiper Speed Relay Output 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 BODY VERIFICATION TEST - VER 1. Body Verification Test

2. WIPER HIGH/LOW RELAY




Turn the ignition off.
Remove the Wiper High/Low Relay from the IPM.
Turn the ignition on.
Activate the Wiper Switch to all speed positions.
With the DRBIII(R), read DTCs.

Q: Does the DRBIII(R) display: Wiper Speed Relay Output Circuit Open?

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

3. POWER DISTRIBUTION CENTER




Turn the ignition off.
Remove the Wiper High/Low Relay from the IPM.
Remove the FCM from the IPM.
Measure the voltage between the Wiper High/Low Relay Control circuit and ground in the IPM.

Q: Is there any voltage present?

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