Jeep Liberty KJ. Manual — part 304
•
When Monitored:
Possible Causes
•
Set Condition:
Possible Causes
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.
MULTIFUNCTION SWITCH
Turn the ignition off.
Disconnect the right side Multifunction Switch harness connector.
Connect a jumper wire between the Fused Ignition Switch Output circuit
and the Front Wiper Motor Low Driver circuit in the Multifunction Switch
harness connector.
Turn the ignition on.
Does the Front Wiper Motor function normally?
Yes
>> Replace the Multifunction Switch.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 2
2.
FRONT WIPER MOTOR GROUND CIRCUIT OPEN
Turn the ignition off.
Disconnect the Front Wiper Motor.
Using a 12-volt test light connected to 12-volts, check the Front Wiper
Motor Ground circuit.
Does the test light illuminate brightly?
Yes
>> Go To 3
No
>> Repair the Front Wiper Motor Ground Circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
8R - 8
WIPERS/WASHERS ELECTRICAL DIAGNOSTICS
KJ
3.
FRONT WIPER MOTOR LOW DRIVER CIRCUIT OPEN
Turn the ignition off.
Disconnect the Front Wiper Motor.
Disconnect the right side Multifunction Switch.
Measure the resistance of the Front Wiper Motor Low Driver circuit.
Is the resistance above 5.0 ohms?
Yes
>> Repair the Front Wiper Motor Low Driver Circuit for an
open.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 4
4.
FRONT WIPER MOTOR
Turn the ignition off.
Disconnect the Front Wiper Motor harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, check the Front Wiper
Motor Low Driver circuit.
Turn the Front Wipers on to Low.
Does the test light illuminate brightly?
Yes
>> Replace the Front Wiper Motor.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Repair the Fused B+ Output circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
KJ
WIPERS/WASHERS ELECTRICAL DIAGNOSTICS
8R - 9
WIPER HIGH/LOW RELAY OUTPUT CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W
8R - 10
WIPERS/WASHERS ELECTRICAL DIAGNOSTICS
KJ
•
When Monitored:
With ignition on.
•
Set Condition:
BCM detects a high level on the Wiper High/Low relay output when it is attempting to turn the wipers on for
more than 5 seconds.
Possible Causes
MISSING RELAY
OPEN CIRCUIT BREAKER
WIPER HIGH/LOW RELAY
BODY CONTROL MODULE
FRONT WIPER PARK SWITCH SENSE CIRCUIT OPEN
Diagnostic Test
1.
INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, clear all BCM DTC’s.
Turn the Front Wipers on.
With the scan tool, read the DTC information.
Does the scan tool read: WIPER HIGH/LOW RELAY CIRCUIT HIGH?
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.
MISSING RELAY
Turn the ignition off.
Check the PDC to make certain the Wiper High/Low Relay is present.
Is the Wiper High/Low Relay present?
Yes
>> Go To 3
No
>> Replace the missing Wiper High/Low Relay.
Perform BODY VERIFICATION TEST - VER 1.
3.
OPEN CIRCUIT BREAKER
Turn the ignition off.
Check the Junction Block Circuit Breaker 3.
Is the Circuit Breaker open?
Yes
>> Replace the open Circuit Breaker.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 4
KJ
WIPERS/WASHERS ELECTRICAL DIAGNOSTICS
8R - 11
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