FCM-Wiper Speed Relay Output Circuit Low

FCM-WIPER SPEED RELAY OUTPUT CIRCUIT LOW

FCM - Wiper Speed Relay Output Circuit Low:

WHEN MONITORED
With the ignition on

SET CONDITION
The FCM detects a low condition

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.
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 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 BODY VERIFICATION TEST - VER 1. Body Verification Test

2. WIPER HIGH/LOW RELAY




Turn the ignition off.
Install a substitute relay in place of the Wiper High/Low Relay.
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 Low?

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

3. POWER DISTRIBUTION CENTER
Turn the ignition off.
Remove the Wiper High/Low Relay.
Remove the FCM from the IPM.
Measure the resistance between ground and the Wiper High/Low Relay Control circuit in the IPM.

Q: Is the resistance below 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