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Sun Roof / T-Top / Convertible Top
Sunroof Description and Operation
Power Sunroof System Components
The power sunroof system consists of the following
components:
• Sunroof module
• Sunroof motor with limit switch
• Sunroof switch
• Sunroof glass, tilt/slide type, with glass sliding
between roof and headliner
• Sunshade
• Rail and track assembly upon which the sunroof glass
rides
• Sunroof system fuse: sunroof 20 A fuse
• Ground G401
Power Sunroof Operation
The power sunroof will operate with the ignition switch
turned to ACC or RUN.
Use the multifunction type sunroof switch, located in the
front center of the headliner, to command the sunroof to:
• Express open
• Slide fully open
• Vent fully open
• Partially open in either slide or vent mode
• Fully closed (flush with the vehicle roof)
General Description
Express Open
The express open will only operate with the sunroof in
the fully closed or partially open position. To express
open the sunroof glass, momentarily press the sunroof
switch to the second rearward position once. This will
apply the sunroof switch low reference circuit to both the
sunroof switch express signal circuit and to the sunroof
switch open signal circuit (12-volt references) inputs,
pulling the them to 0 volts momentarily. The momentary
transition inputs to the sunroof module indicates an
express open request. Once the express open has been
initiated, the sunroof module will drive the motor in the
open direction, slightly lowering the rear edge of the
sunroof glass, then sliding open with the sunshade,
allowing the wind deflector to raise upward. The sunroof
glass will continue to express open until:
• The sunroof glass reaches a predetermined (nearly
full open) comfort stop position controlled by the limit
switch.
• Activation of the sunroof switch (in any direction) to
stop the sunroof glass in a desired position other than
the express open (comfort stop) position.
• Motor stall is sensed because the sunroof glass is
being obstructed.
• The operation time-out expires, 15 seconds after the
initiation of the express open feature has been
requested.
To Open
Opening the sunroof can be done from any position
between fully closed and partially open. To open the
sunroof glass, press and hold the sunroof switch to the
first rearward position. This will apply the sunroof switch
low reference circuit to the sunroof switch open vent
signal circuit (12-volt reference) input, pulling the
reference voltage to 0 volts. The constant low (0 volts)
input to the sunroof module indicates an open request.
Once the open has been initiated, the sunroof module
will drive the motor in the open direction, slightly
lowering the rear edge of the sunroof glass, then sliding
open with the sunshade, allowing the wind deflector to
raise upward. The sunroof glass will continue to open
until the sunroof motion is terminated by either:
• Motor stall is sensed because the sunroof has
reached its limit of travel or due to an obstruction.
• Releasing of the sunroof switch. The sunroof may be
left in any position between fully open and fully closed.
• The operation time-out expires, 15 seconds after the
initiation of the express open feature had been
commanded.
Sun Roof / T-Top / Convertible Top:
9I-1
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Troubleshooting
