Sunroof Description and Operation One Connector System
Sunroof
This diagnostic procedure is to be used for the 1 connector Sunroof System that
combines the sunroof control module with the sunroof motor/actuator.
The Sunroof System consists of the following components:
| • | Body control module (BCM) |
| • | Sunroof module (includes sunroof motor/actuator) |
The Sunroof System is controlled by the sunroof switch and the sunroof motor/actuator
assembly.
When the ignition is turned to RUN or ACCESSORY, or when the retained accessory
power (RAP) system is active, the body control module (BCM) applies a ground to the
RAP relay in the instrument panel (I/P) fuse block. This activates the RAP relay and
allows battery positive voltage to be applied through the SUNROOF Fuse to the sunroof
module. Ground for the sunroof module is supplied from G302.
The sunroof can be placed in 3 preset positions:
When the sunroof switch is placed in the OPEN position, a ground is applied
from the sunroof switch low reference circuit , through the sunroof switch and to
the sunroof switch open signal circuit. The sunroof motor/actuator then applies voltage
to the sunroof motor open control circuit and applies a ground to the sunroof motor
close circuit. The sunroof motor then opens the sunroof to the full open position.
When the sunroof switch is placed in the VENT position, a ground is applied
from the sunroof switch low reference circuit , through the sunroof switch and to
the sunroof switch open signal circuit. The sunroof module then applies voltage to
the sunroof motor open control circuit and applies a ground to the sunroof motor close
circuit. The sunroof motor then opens the sunroof to the VENT position.
When the sunroof switch is placed and held in the CLOSED position, a ground
is applied from the sunroof switch low reference circuit , through the sunroof switch
and to the sunroof switch close signal circuit. The sunroof module then applies voltage
to the sunroof motor close control circuit and applies a ground to the sunroof motor
open circuit. The sunroof motor then closes the sunroof.
The sunroof can be placed in any preferred open position when:
| • | The sunroof is in the fully opened position by pressing and holding the
sunroof switch in the CLOSE position until the panel has reached the desired position
then release the CLOSE switch in order to stop the sunroof |
| • | The sunroof is opening, it can be stopped by momentarily pressing either
side of the switch. |
The sunroof control module, sun roof actuator, and the sunroof motor are integral
parts of the sunroof module assembly and are not service separately.
