Jeep Liberty KJ. Manual — part 307
WIPER PARK SWITCH FAILURE
For a complete wiring diagram Refer to Section 8W
•
When Monitored:
With the Wipers on (any speed).
•
Set Condition:
BCM fails to detect a park signal from the wiper motor for 8 consecutive seconds.
Possible Causes
MULTIFUNCTION SWITCH
FRONT WIPER MOTOR GROUND CIRCUIT OPEN
FRONT WIPER MOTOR LOW DRIVER CIRCUIT OPEN
FRONT WIPER MOTOR
FUSED IGNITION SWITCH OUTPUT CIRCUIT
Diagnostic Test
1.
INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, erase all BCM DTC’s.
Turn the Wipers on.
With the scan tool, read DTCs.
Does the scan tool display: WIPER PARK SWITCH FAILURE?
Yes
>> Go To 2
No
>> The condition is not present at this time. Monitor scan tool parameters while wiggling the related wire
harness. Refer to any Technical Service Bulletins that may apply. Visually inspect the related wiring har-
ness and connector terminals.
Perform BODY VERIFICATION TEST - VER 1.
2.
FRONT WIPER PARK SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
Turn the ignition off.
Disconnect the Front Wiper Motor harness connector.
Disconnect the Junction Block C3 harness connector.
Turn the ignition on.
Measure the voltage of the Wiper Park Switch Sense circuit in the Front Wiper Motor harness connector.
Is there any voltage present?
Yes
>> Repair the Wiper Park Switch Sense circuit for a short to voltage.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 3
8R - 20
WIPERS/WASHERS ELECTRICAL DIAGNOSTICS
KJ
3.
FRONT WIPER PARK SWITCH SENSE CIRCUIT OPEN
Turn the ignition off.
Disconnect the Front Wiper Motor harness connector.
Disconnect the Junction Block C3 harness connector.
Measure the resistance of the Wiper Park Switch Sense circuit between the Junction Block C3 harness connector
and the Wiper Motor harness connector.
Is the resistance below 5.0 ohms?
Yes
>> Go To 4
No
>> Repair the Front Wiper Park Switch Sense circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
4.
FRONT WIPER PARK SWITCH SENSE CIRCUIT SHORT TO GROUND
Turn the ignition off.
Disconnect the Front Wiper Motor harness connector.
Disconnect the Junction Block C3 harness connector.
Measure the resistance between ground and the Wiper Park Switch Sense circuit in the Junction Block C3 harness
connector.
Is the resistance below 100.0 ohms?
Yes
>> Repair the Front Wiper Park Switch Sense circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 5
5.
GROUND CIRCUIT OPEN
Turn the ignition off.
Disconnect the Front Wiper Motor harness connector.
Using a 12-volt test light connected to 12-volts, test the Ground circuit in the Front Wiper Motor harness connector.
Does the test light illuminate brightly?
Yes
>> Go To 6
No
>> Repair the Wiper Motor Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
6.
WIPER MOTOR
Turn the ignition off.
Disconnect the Front Wiper Motor harness connector.
Turn the ignition on.
Connect a jumper wire from the Wiper Park Switch Sense circuit to ground.
With the scan tool in Inputs/Outputs read: Wiper Park Switch state.
Did the Wiper Park Switch Input change state when connected to ground?
Yes
>> Replace the Wiper Motor.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
KJ
WIPERS/WASHERS ELECTRICAL DIAGNOSTICS
8R - 21
WIPERS/WASHERS - SERVICE INFORMATION
TABLE OF CONTENTS
page
page
WIPERS/WASHERS - SERVICE INFORMATION
WIPER & WASHER SYSTEMS . . . . . . . . . . . . . . . 36
CHECK VALVE
REAR WIPER MOTOR
WASHER FLUID LEVEL SWITCH
WASHER HOSES/TUBES
WASHER NOZZLE
WASHER PUMP/MOTOR
WASHER RESERVOIR
WIPER ARM
WIPER ARM PARK RAMP
WIPER BLADE
WIPER HIGH/LOW RELAY
WIPER MODULE
8R - 22
WIPERS/WASHERS - SERVICE INFORMATION
KJ
WIPER ON/OFF RELAY
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
KJ
WIPERS/WASHERS - SERVICE INFORMATION
8R - 23
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