Jeep Liberty KJ. Manual — part 170
SUNROOF DIAGNOSIS CHART
SYMPTOM
POSSIBLE CAUSE
CORRECTION
Sunroof completely
inoperative.
Inoperative control switch.
Perform sunroof switch diagnostics,
(Refer to 8 - ELECTRICAL/POWER
TOP/SWITCH - DIAGNOSIS AND
TESTING).
Inoperative circuit ground between
sunroof motor/module, control switch,
and body harness.
Inspect ground connections and
wiring. Repair as necessary.
Inoperative power circuit between
sunroof motor/module, control switch,
and body harness.
Check the condition of the circuit
protection and inspect all wiring.
Repair as necessary.
Inoperative sunroof motor/module.
Replace the sunroof motor/module,
(Refer to 8 - ELECTRICAL/POWER
TOP/MOTOR - REMOVAL).
Audible whine when switch
is depressed, sunroof does
not operate.
Inoperative sunroof motor/module.
Replace the sunroof motor/module,
(Refer to 8 - ELECTRICAL/POWER
TOP/MOTOR - REMOVAL).
Binding cable.
Repair or replace binding cable as
necessary.
Audible clicking or
ratcheting when switch is
pressed, sunroof does not
operate.
Broken or worn drive cable.
Repair or replace binding cable as
necessary.
Worn drive motor gear.
Replace the sunroof motor/module,
(Refer to 8 - ELECTRICAL/POWER
TOP/MOTOR - REMOVAL).
Mechanisms not synchronized.
Synchronize mechanisms, (Refer to 8
- ELECTRICAL/POWER TOP/MOTOR
- STANDARD PROCEDURE -
SUNROOF MOTOR/MODULE
CALIBRATION).
Sunroof vents and opens,
but does not close.
Broken or disengaged trough guide.
Repair trough guide as necessary.
Binding cable.
Repair or replace binding cable as
necessary.
Inoperative sunroof
9
CLOSE
9
circuit.
Check the condition of the circuit,
connections and wiring. Repair as
necessary.
Inoperative control switch.
Perform sunroof switch diagnostics,
(Refer to 8 - ELECTRICAL/POWER
TOP/SWITCH - DIAGNOSIS AND
TESTING).
Inoperative sunroof motor/module.
Replace the sunroof motor/module,
(Refer to 8 - ELECTRICAL/POWER
TOP/MOTOR - REMOVAL).
8N - 102
POWER TOP - SUNROOF
KJ
SYMPTOM
POSSIBLE CAUSE
CORRECTION
Sunroof vents, but does not
open.
Binding cable or mechanism.
Repair or replace binding cable as
necessary.
Inoperative sunroof
9
OPEN
9
circuit.
Check the condition of the circuit,
connections and wiring. Repair as
necessary.
Inoperative control switch.
Perform sunroof switch diagnostics,
(Refer to 8 - ELECTRICAL/POWER
TOP/SWITCH - DIAGNOSIS AND
TESTING).
Inoperative sunroof motor/module.
Replace the sunroof motor/module,
(Refer to 8 - ELECTRICAL/POWER
TOP/MOTOR - REMOVAL).
Sunroof does not vent
Binding cable or mechanism.
Repair or replace binding cable as
necessary.
Inoperative sunroof
9
VENT
9
circuit.
Check the condition of the circuit,
connections and wiring. Repair as
necessary.
Inoperative control switch.
Perform sunroof switch diagnostics,
(Refer to 8 - ELECTRICAL/POWER
TOP/SWITCH - DIAGNOSIS AND
TESTING).
Inoperative sunroof motor/module.
Replace the sunroof motor/module,
(Refer to 8 - ELECTRICAL/POWER
TOP/MOTOR - REMOVAL).
Glass movement not
consistant or glass does not
operate smoothly
Glass and Track timing.
Glass and Track alignment.
Cables and Guide alignment.
Perform the necessary adjustments,
(Refer to 23 - BODY/SUNROOF/
GLASS PANEL - ADJUSTMENTS).
KJ
POWER TOP - SUNROOF
8N - 103
MOTOR/MODULE - SUNROOF
DIAGNOSIS AND TESTING -
For complete circuit diagrams, refer to the appropriate wiring information. The wiring information includes wir-
ing diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector
pin-out information and location views for the various wire harness connectors, splices and grounds.
If the power top is completely inoperative perform the following diagnostic steps.
1. Check the Accessory delay 30 amp Circuit breaker in the Junction Block. If OK, go to Step 2. If not OK, repair
the shorted circuit or component as required and replace the inoperative circuit breaker.
2. Partially remove the headliner to access the sunroof motor/module.
3. Disconnect the motor/module electrical connector. With the ignition switch in the “RUN” position check for Battery
voltage at the Accessory Relay Output terminal of the harness connector. If OK, go to Step 4. If not OK repair
the Accessory Relay Output circuit as necessary.
4. Using an ohmmeter test for continuity between the harness connector ground circuit and a known good ground.
Continuity should be present. If OK, go to Step 5. If not OK, repair the open ground circuit as necessary.
5. Turn the ignition switch to the “OFF” position. Reconnect the motor/module electrical connector. With the ignition
switch in the “RUN” position check for 5 volts on the “VENT”, “CLOSE” and “OPEN” control circuits at the back
side of the motor/module connector. If OK, go to Step 6. If not OK, replace the motor/module assembly, (Refer
to 8 - ELECTRICAL/POWER TOP/MOTOR - REMOVAL).
6. Turn the ignition switch to the “OFF” position. Disconnect the motor/module and sunroof switch electrical con-
nectors. Using an ohmmeter check for continuity on the “VENT”, “CLOSE” and “OPEN” circuits between the
motor/module and sunroof switch. Continuity should be present. If OK, (Refer to 8 - ELECTRICAL/POWER TOP/
SWITCH - DIAGNOSIS AND TESTING) for diagnosis of the sunroof switch. If not OK, repair the control circuits
as necessary.
STANDARD PROCEDURE
STANDARD PROCEDURE - POWER SUNROOF TIMING
NOTE: Perform the timing procedures if any of the following conditions exist:
•
Glass skewed in the channel
•
One side of the glass dropping before the other while moving from “VENT” to “CLOSE”
•
Glass reversing direction when closing the sunroof
•
Glass will not close or may stop at the wrong location
•
The glass may over travel the “OPEN” position and stall the motor
•
The glass may over travel the “CLOSE” position and stall the motor
NOTE: The timing of the motor/module and the sunroof assembly play a critical role in the proper function
of the sunroof. If the motor/module is removed and the sunroof glass or cables are moved the sunroof
module will have to be timed. REFER to the following procedure for the necessary steps.
1. Perform the motor/module re-initialization procedure, (Refer to 8 - ELECTRICAL/POWER TOP/MOTOR - STAN-
DARD PROCEDURE).
2. Remove the motor/module, (Refer to 8 - ELECTRICAL/POWER TOP/MOTOR - REMOVAL).
3. Remove sunroof glass panel (Refer to 23 - BODY/SUNROOF/GLASS PANEL - REMOVAL).
4. Now place both right and left arms in the closed position. Using a screwdriver, push the plastic cable all the way
forward in the track until the glass mounting arm drops into the closed position.
5. Repeat this on the other side.
6. To verify correct timing, there is an 1/8 inch hole in the cable ramp that must be aligned with the front glass
mounting screw hole.
7. Using an awl, verify alignment of both right and left timing holes. The tracks will now be timed to the fully closed
position.
8. Install the motor/module (Refer to 8 - ELECTRICAL/POWER TOP/MOTOR - INSTALLATION).
8N - 104
POWER TOP - SUNROOF
KJ
9. Install the sunroof glass panel, (Refer to 23 - BODY/SUNROOF/GLASS PANEL - INSTALLATION).
10. Perform the motor/module re-initialization procedure, (Refer to 8 - ELECTRICAL/POWER TOP/MOTOR - STAN-
DARD PROCEDURE).
STANDARD PROCEDURE - RE-INITIALIZATION
NOTE: If for some reason the sunroof is not operating normally it may be necessary to re-initialize the sun-
roof assembly. This procedure should be attempted prior to any diagnosis of the sunroof system.
NOTE: The re-initialization procedure is not complete if any one of the following conditions occurs before
the re-initialization procedure is completed:
•
The sunroof switch is not held in the CLOSE position.
•
The ignition or battery power is lost.
•
The glass panel has not reached its closed position.
NOTE: If the re-initialization procedure is not carried out completely, it must be started over.
1. Cycle the sunroof to full “OPEN” position.
2. Once the sunroof is in the full “OPEN” position, press and continuously hold the “OPEN” button on the sunroof
switch.
3. After a delay of 10 seconds the sunroof will begin to move past the normal “OPEN” position to the hard stop
position. It will then reverse to the normal “OPEN” position also known as the soft stop. Once the sunroof has
reversed to the soft stop, immediately (within 5 seconds of stopping travel) release the “OPEN” button and con-
tinuously press it again.
4. After a delay of three seconds the sunroof will begin moving to the “VENT” and then “CLOSED” position. When
the roof reaches the fully “CLOSED” position and stops the “OPEN” button can be released.
The re-initialization procedure is now complete. Operate the sunroof in all directions to verify proper operation.
STANDARD PROCEDURE - INITIALIZATION
NOTE: This procedure should be attempted any time a new motor/module is installed in the sunroof assem-
bly. It must be performed on initial vehicle power up to be successful.
NOTE: The initialization procedure is not complete if any one of the following conditions occurs before the
initialization procedure is completed:
•
The sunroof switch is not held in the CLOSE position.
•
The ignition or battery power is lost.
•
The glass panel has not reached its closed position.
NOTE: if the initialization procedure is not carried out completely, it must be started over.
1. Turn the ignition key to the “RUN” position.
2. Move the sunroof to the full open position.
3. Continuously press the “OPEN” button on the sunroof switch.
4. The sunroof will begin to move past the normal “OPEN” position to the hard stop position. It will then reverse to
the normal “OPEN” position also known as the soft stop. Once the sunroof has reversed to the soft stop,
immediately (within 5 seconds of stopping travel) release the “OPEN” button and continuously press it again.
5. After a delay of three seconds the sunroof will begin moving to the “VENT” and then “CLOSED” position. When
the roof reaches the fully “CLOSED” position and stops the “OPEN” button can be released.
The initialization procedure is now complete. Operate the sunroof in all directions to verify proper operation.
KJ
POWER TOP - SUNROOF
8N - 105
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