opened, closed or placed in the vent position electri-
cally by actuating a switch in the overhead console.
The sunroof system receives battery feed through a
fuse in the Integrated Power Module (IPM), when the
ignition switch is in the RUN and ACCESSORY posi-
tions. The sunroof will continue to operate normally
with the key in the OFF position or with the key
removed while the Accessory Delay System is active.

The sunroof glass panel tilts upward at the rear for

ventilation and slides rearward under the roof when
open. The panel seals flush with the roof in the
closed position to eliminate wind noise. The sunroof
includes a manual-sliding sunshade to cover the
deep-tinted glass panel.

The main components of the power sunroof system

are:

• The motor/module assembly

• The power sunroof glass

• The U-Frame assembly

• The power sunroof switch

• The manual-sliding sunshade

OPERATION

This vehicle has a vent, tilt and slide power sun-

roof system with express (one-touch) open feature.
The sunroof system receives battery feed through a
fuse in the Integrated Power Module (IPM), when the
ignition switch is in the RUN and ACCESSORY posi-
tions. The sunroof will operate normally with the key

in any position while the Accessory Delay system is
active.

The sunroof is electrically operated from a switch

located in the overhead console. The switch is a com-
bination rocker/push button style design that will
operate the sunroof. When pressing and releasing the
open button once, the sunroof will express open to
the comfort stop and the wind deflector will raise. If
the button is pressed a second time, the sunroof will
continue to open to full travel unless the button is
released, at which time it will stop in that position.
Pressing and holding the close button will close the
sunroof. If the close button is released before the
glass fully closes, the sunroof will stop in that posi-
tion. Pressing and holding the vent button will cause
the sunroof glass panel to tilt upward at the rear
into the “VENT” position.

DIAGNOSIS AND TESTING

SUNROOF

Refer to SUNROOF DIAGNOSIS CHART for pos-

sible causes. Before beginning sunroof diagnostics
verify that all other power accessories are in proper
operating condition. If not, a common electrical prob-
lem may exist.

Check the condition of the circuit protection and

inspect all wiring connector pins for proper engage-
ment and continuity. For complete circuit diagrams,
refer to the appropriate wiring information. The wir-
ing information includes wiring 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.

POWER TOP - SUNROOF

8N - 37

SUNROOF DIAGNOSIS CHART

Fig. 1 SUN ROOF ASSEMBLY

1 - Glass Assembly

8 - Insulator

2 - Screw(s)

9 - Motor/Module

3 - Motor Clip

10 - Lace

4 - Motor Cover

11 - Wind Deflector

5 - U-Frame Assembly

12 - Sun Shade

6 - Rear Drain Covers

13 - Water Channel

7 - Screw(s)

14 - Screw(s)

8N - 38

POWER TOP - SUNROOF

POWER TOP - SUNROOF (Continued)

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

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).

POWER TOP - SUNROOF

8N - 39

POWER TOP - SUNROOF (Continued)

SYMPTOM

POSSIBLE CAUSE

CORRECTION

Sunroof vents, but does not
open.

Binding cable or mechanism.

Repair or replace binding cable as
necessary.

Inoperative sunroof

OPEN

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

VENT

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).

MOTOR/MODULE - SUNROOF

DIAGNOSIS AND TESTING -

For complete circuit diagrams, refer to the

appropriate wiring information. The wiring infor-
mation includes wiring 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 con-
nectors, splices and grounds.

If the power top is completely inoperative perform

the following diagnostic steps.

(1) Check the B+ 40 amp fuse in the Integrated

Power Module (IPM). If OK, go to Step 2. If not OK,
repair the shorted circuit or component as required
and replace the inoperative fuse.

(2) Check the Accessory delay 20 amp fuse in the

IPM. If OK, go to Step 3. If not OK, repair the
shorted circuit or component as required and replace
the inoperative fuse.

(3) Partially remove the headliner to access the

sunroof motor/module.

(4) Disconnect the motor/module electrical connec-

tor. Using a voltmeter check for Battery voltage at
the B+ terminal of the harness connector. If OK, go
to Step 5. If not OK, repair the B+ circuit as neces-
sary.

(5) With the ignition switch in the “RUN” position

check for Battery voltage at the Accessory Relay Out-
put terminal of the harness connector. If OK , go to
Step 6. If not OK repair the Accessory Relay Output
circuit as necessary.

(6) 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 7. If not OK, repair the open ground circuit
as necessary.

(7) Turn the ignition switch to the “OFF” position.

Reconnect the motor/module electrical connector.
With the ignition switch in the “RUN” position check
for battery voltage on the “VENT”, “CLOSE” and
“OPEN” circuits at the back side of the motor/module
connector. If OK, go to Step 8. If not OK replace the
motor/module assembly, (Refer to 8 - ELECTRICAL/
POWER TOP/MOTOR - REMOVAL).

8N - 40

POWER TOP - SUNROOF

POWER TOP - SUNROOF (Continued)

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