switches located on the windshield header, rearward
of the map lamp. To operate the sunroof the ignition
switch must be in the On/Run position. One switch
(CLOSE) is a push button type and used too close the
sunroof. Pressing and holding the CLOSE button, the
sunroof will fully close. If the CLOSE button is
released prior to the sunroof reaching the fully closed
position, the sunroof will stop in that position. The
other switch (OPEN/VENT) is a rocker type for open-
ing and venting the sunroof. Pressing and releasing
the OPEN button once the sunroof will express open
and the wind deflector will raise. If the button is
pressed a second time the sunroof will stop in that
position. To open the sunroof from the vent position,
push and hold the open button. The sunroof will not

express open until you have passed through the full
closed position. The OPEN button may be released
and the sunroof will continue to open in the express
open feature. If the VENT button is pressed and held
while the sunroof is in the open position, the sunroof
will travel to the close position and then to the vent
position. Releasing the button at anytime during the
travel will cause the sunroof to stop at that current
position.

DIAGNOSIS AND TESTING

Before beginning sunroof diagnostics verify that all

other power accessories are in proper operating con-
dition. Refer to Sunroof Diagnostic Chart for possible
causes. If not, a common electrical problem may
exist. Refer to Wiring Diagram Information, of this
publication for circuit, splice and component descrip-
tions. Check the condition of the circuit protection
(20 amp high current fuse (battery feed) located in
the Power Distribution Center (PDC). Check the
cover of the PDC for location of the fuse. The ten
amp fuse (ignition feed) located in cavity 14 of the
Junction Block). Inspect all wiring connector pins for
proper engagement and continuity. Check for battery
voltage at battery and ignition pins of the power sun-
roof express module wiring connector. Refer to Wiring
Diagram Information, for circuit information. The
controller will not operate at less than 10 volts.
Check the ground at the sunroof express module.

SUNROOF

23 - 101

Before beginning diagnosis for wind noise or water

leaks, verify that the problem was not caused by
releasing the control switch before the was sunroof
fully closed. The sunroof module has a water man-
agement

system.

During

washing

high-pressure

water may be forced between the glass panel seal
and the roof opening. Normally this water will drain.
However, when some type of drying blower system is

used, like those found in automatic car washes, the
water may not have a chance to drain before the
blower forces air between the seal and the roof open-
ing. This causes the water to blow over the edge of
the module and onto the headlining.

Refer to (Fig. 1) Sunroof Assembly for exploded

view of the sunroof.

SUNROOF DIAGNOSIS CHART

SYMPTOM

POSSIBLE CAUSE

Sunroof motor inoperative.

Faulty control switch.
Faulty circuit ground between sunroof express module, drive
motor, control switch, and body harness.
Faulty power circuit between sunroof express module, drive
motor, switch, and body harness.
Faulty sunroof drive motor.
Faulty sunroof express module.
Faulty sunroof drive motor connector.

Audible whine when switch is depressed,
sunroof does not operate.

Faulty sunroof drive motor.
Binding cable.

Audible clicking or ratcheting when switch is
pressed, sunroof does not operate.

Broken or worn drive cable.
Worn drive motor gear.
Mechanisms not synchronized.

Sunroof vents and opens, but does not close.

Binding cable.
Faulty circuit.
Faulty control switch.
Faulty sunroof express module.
Faulty drive motor.

Sunroof vents, but does not open.

Binding linkage.
Faulty circuit.
Faulty switch.
Faulty sunroof controller.
Faulty drive motor.

Sunroof does not vent

Binding cable.
Faulty circuit.
Faulty control switch.
Faulty sunroof express module.

Sunroof water leak.

Drain tubes clogged or kinked.
Glass panel improperly adjusted.
Faulty glass panel seal.

Wind noise from sunroof.

Front of glass panel too high or rear too low.
Glass panel not centered in opening.
Faulty glass panel seal.

Rattles from open sunroof while driving

Loose or broken attaching hardware.
Worn or broken mechanism.

Rattles from closed sunroof while driving

Loose or broken attaching hardware.
Worn or broken mechanism

23 - 102

SUNROOF

SUNROOF (Continued)

Fig. 1 SUNROOF ASSEMBLY

1 - SUNSHADE

2 - EXPRESS MODULE

3 - DRIVE MOTOR

4 - FRAME ASSEMBLY

5 - WIND DEFLECTOR

6 - GLASS PANEL

7 - DRAIN CHANNEL

SUNROOF

23 - 103

SUNROOF (Continued)

Fig. 2 SUNROOF HOUSING ASSEMBLY REMOVAL

1 - DRAIN HOSE
2 - DRAIN HOSE
3 - SUN ROOF FRAME ASSEMBLY

4 - DRAIN HOSE
5 - A-PILLAR

23 - 104

SUNROOF

SUNROOF (Continued)

Content .. 366 367 368 369 ..