Symptom:
FCM-WIPER ON-OFF RELAY OUTPUT CIRCUIT OPEN
POSSIBLE CAUSES
INTERMITTENT CONDITION
WIPER ON/OFF RELAY
POWER DISTRIBUTION CENTER
FRONT CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, clear all FCM DTC’s.
Turn the Wipers ON then OFF.
With the DRBIIIt, read the DTC information.
Does the DRBIIIt read: Wiper ON-OFF Relay Output Circuit Open?
All
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.
2 Turn the ignition off.
Install a substitute relay in place of the Wiper On/Off Relay.
Turn the ignition on.
With the DRBIIIt, read DTCs.
Does the DRBIIIt display: Wiper On/Off Relay Output Circuit Open?
All
Yes → Go To 3
No → Replace the Wiper On/Off Relay in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
3 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.
Is the resistance above 5.0 ohms?
All
Yes → Replace the Power Distribution Center (PDC ) in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No → Replace the Front Control Module (FCM) in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
538
WINDSHIELD WIPER & WASHER
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