The power sunroof, CF5 option has the following features:
| • | A manually operated sunshade. A recess in the sunshade allows
you to push the shade open or pull the shade shut. |
| • | An express module at the front of the sunroof module. This module
allows the window panel to stop in the closed, vent, and fully open positions. |
| • | The position encoding system (PES) module contains the limit switches
for the window panel operation. The gearing in this module drives the window
into the desired position. The window panel must be in the closed position
when you replace this unit. |
| • | The sunroof actuator attaches to the PES module and contains the
driveshaft that drives the gearing in the PES. This driveshaft will turn infinitely
in both directions. |
| • | The power sunroof switch is a 2 position rocker type switch which
electrically operates the power sunroof. The switch is located in the headliner
in front of the sunroof. Press and hold the front indent position in order
to move the sunroof glass to the vent position. Press and hold the rear indent,
and the sunroof will return to the full closed position. |
| | Press
the rear indent once, and the sunroof glass will slide to the full open position
automatically. This is the express open feature. |
| | Press and hold
the front indent position on the control switch in order to close the sunroof
window from the open position. Hold the switch until the window reaches a
desired position or until the window closes completely. |
| • | A drain trough is positioned under the sunroof glass panel. Water
is collected by this trough and is drained off by drain hoses connected at
each corner. |
| • | The glass panel seal fits around the glass panel and is used to
seal the opening between the glass panel and the roof panel. |
| • | The sunroof electrical harness is routed to join the body harness
at the right rear pillar. |
Power Sunroof System Components
The power sunroof system consists of the following components:
| • | Position Encoding System (PES) module limit switches |
| • | Sunroof glass tilt/slide type, with glass sliding between roof
and headliner |
| • | Rail and track assembly upon which the sunroof glass rides |
| • | Power supply for the sunroof module: PWR WINDOWS PWR SUN ROOF
30 A circuit breaker |
Power Sunroof Operation
The power sunroof operates with the ignition switch turned to Accessory,
ON or retained accessory power (RAP), when applicable. Once the ignition switch
is turned to OFF the sunroof will continue to operate until any door is opened
or when RAP has timed out. For a description and operation of the RAP operation,
refer to
Retained Accessory Power (RAP) Description and Operation
in Retained Accessory Power.
Use the rocker type sunroof switch, located in the front center of the
headliner, in order to command the sunroof to move the following positions:
Press the rearward portion on the sunroof switch in order to slide the
sunroof glass:
| • | Vent position to the closed position |
| • | Closed position to the open position |
Press the forward portion of the sunroof switch in order to slide the
sunroof glass:
| • | Open position to the closed position |
| • | Closed position to the vent position |
Vent Open
To open the power sunroof to the vent position from the closed position,
press and hold the forward portion of the sunroof switch. This causes a 5-volt
reference input to the sunroof switch close signal circuit to drop to 0 volts.
As long as the sunroof module detects a constant input request of 0 volts,
the module will continue to raise the rear of the glass upward toward the
full vent position. The sunroof glass will stop softly at the full vent position
based on the inputs from the limit switches. In order to stop the sunroof
glass in a position other than the full vent position, release the sunroof
switch when the sunroof glass reaches the desired vent position. Manually
slide the sunshade open.
Close from Vent Position
To close the power sunroof from the vent position, press and hold the
rearward portion of the sunroof switch. This causes a 5-volt input to the
sunroof switch open signal circuit to drop to 0 volts. As long as the
sunroof module detects a constant input request of 0 volts, the module
will continue to lower the rear of the glass downward to the closed position.
The sunroof glass will stop softly at the closed position based on the inputs
from the limit switches. Manually slide the sunshade closed.
Express Open
The express open function will work only with the glass between the
closed position and the partially open position. In order to use the express
open function, press the rearward portion of the sunroof switch once. This
causes a 5-volt reference input to the sunroof switch signal open signal circuit
to drop to 0 volts momentarily. This momentary drop in voltage indicates
an express open request. The sunroof glass will lower slightly, then begin
to automatically slide between the roof and the headliner. The sunroof glass
will stop softly at the full open position based on the inputs from the limit
switches. As the sunroof glass opens, the sunshade opens automatically. To
stop the sunroof glass in a desired position other than to the express open
position, press the sunroof switch again in either direction.
Close from Open Position
To close the power sunroof from the open position, use the same procedure
as when you open the sunroof glass to the vent position. Press and hold the
forward portion of the sunroof switch. This causes a 5-volt reference input
to the sunroof switch close signal circuit to drop to 0 volts. As long
as the sunroof module detects a constant input request of 0 volts,
the module will continue to slide the sunroof glass to the closed position.
As the sunroof glass nears the closed position the sunroof glass will stop
softly at the closed position based on the inputs from the limit switches.
Manually slide the sunshade closed.
Sunroof Motor
The sunroof has a bi-directional motor. When the motor is not operating,
both circuits are grounded. When the motor drives the sunroof glass in the
direction from the vent to closed or closed to open position, the following
occurs:
| • | Voltage is supplied to the sunroof motor open control circuit. |
| • | Ground is maintained to the sunroof motor close control circuit. |
When the motor drives the sunroof in the direction from the open to
closed or closed to vent position, the following occurs:
| • | Voltage is supplied to the sunroof motor close control circuit. |
| • | Ground is maintained to the sunroof motor open control circuit. |
The sunroof module is equipped with a timer circuit which stops the
operation of the sunroof motor after 8 seconds.
Position Encoding System (PES) Module
The position encoding system (PES) module tracks the position of the
glass through the limit switches and detects the limits of travel to the following
positions:
The sunroof module monitors the limit switches. As a limit switch closes,
the sunroof limit switch circuit 5-volt reference is shorted to the sunroof
limit switch low reference circuit, pulling the reference voltage to 0 volts.
The sunroof module detects the position of the sunroof glass based on the
multiple input combinations through the limit switch inputs, which brings
the sunroof glass to a soft stop under the following conditions:
| • | When the glass has reached the full vent position |
| • | When the glass has reached the full open position |
| • | When the glass has reached the closed position |
Sunroof Maintenance
- Clean the surface of the window by wiping with a clean, dampened
cloth using GM Window Cleaner GM P/N 10500427 or equivalent.
- Apply a silicone lubricant GM P/N 12345579 or equivalent
in order to achieve the following results:
| • | Prolong the weatherstrip life |
| • | Help to seal the weatherstrip |
| • | Assist in eliminating squeaks |
