Jeep Liberty KJ. Manual — part 155
*DRIVER DOOR FAILS TO LOCK AND UNLOCK
For a complete wiring diagram Refer to Section 8W.
8N - 42
POWER LOCKS - ELECTRICAL DIAGNOSTICS
KJ
Possible Causes
DOOR LOCK MOTOR - OPEN
(P34) DRIVER DOOR UNLOCK RELAY OUTPUT WIRE OPEN
(P33) DOOR LOCK RELAY OUTPUT WIRE OPEN
DRIVER DOOR UNLOCK RELAY GROUND OPEN
Diagnostic Test
1.
CHECK DOOR LOCK MOTOR
Turn the ignition off.
Remove the inner door trim panel to gain access to the Door Lock
Motor connector.
Disconnect the Driver Door Lock Motor connector.
Remove the key from the ignition switch.
Connect a test light between the Door Lock Relay Output and the Driver
Door Unlock Relay Output circuits in the door lock motor connector.
Turn the ignition on.
Press the door lock switch to the Lock and Unlock positions.
Did the test light illuminate brightly when the lock switch was
pressed in both directions?
Yes
>> Replace the Door Lock Motor.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
No
>> Go To 2
2.
CHECK (P34) DRIVER DOOR UNLOCK RELAY OUTPUT WIRE FOR AN OPEN
Using a 12-volt test light connected to ground, check the (P34) Driver
Door Unlock Relay Output circuit in the door latch connector.
Close the driver door or trip the latch to the door closed position
With the scan tool actuate the DRIVER DOOR UNLOCK RELAY.
Does the test light illuminate brightly when the relay is actu-
ated?
Yes
>> Go To 3
No
>> Repair the (P34) Driver Door Unlock Relay Output wire for
an open.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
KJ
POWER LOCKS - ELECTRICAL DIAGNOSTICS
8N - 43
3.
CHECK (P33) DOOR LOCK RELAY OUTPUT WIRE FOR AN OPEN
Using a 12-volt test light connected to ground, check the (P33) Door
Lock Relay Output circuit.
With the scan tool actuate the Door Lock Relay.
Does the test light illuminate brightly when the relay is actu-
ated?
Yes
>> Go To 4
No
>> Repair the (P33) Door Lock Relay Output wire for an open.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
4.
CHECK DRIVER DOOR UNLOCK RELAY GROUND
Remove the Driver Door Unlock Relay.
Using a 12-volt test light connected to 12-volts, check the Driver Door
Unlock Relay Ground circuit (cavity 87a) in the relay connector.
Does the test light illuminate brightly?
Yes
>> Replace the Driver Door Unlock Relay.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
No
>> Repair the Driver Door Unlock Relay Ground circuit for an
open or replace the Junction Block.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
8N - 44
POWER LOCKS - ELECTRICAL DIAGNOSTICS
KJ
*DRIVER DOOR FAILS TO UNLOCK
For a complete wiring diagram Refer to Section 8W.
KJ
POWER LOCKS - ELECTRICAL DIAGNOSTICS
8N - 45
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