Sunroof / Moonroof: Description and Operation

CIRCUIT OPERATION
The optional power sunroof is supplied power on two circuits. One circuit is the F35. This circuit is a direct battery feed to the sunroof control module. This circuit is protected by a 20 Amp circuit breaker located in the junction block cavity 23. Power for the circuit breaker is supplied on circuit A3. This circuit is protected by a 30 Amp fuse located in cavity H of the Power Distribution Center (PDC). Both the A3 and F35 circuits are HOT at all times. Circuit F35 is spliced and provides power to the power seats, power antenna, and the power door locks.

The second power source is on circuit G5. This circuit is HOT in the RUN position only, and protected by a 5 Amp fuse located in cavity 14 of the junction block. Power for the fuse is supplied on circuit A21 from the ignition switch. Power for the A21 circuit is supplied by circuit A1. This circuit is protected by a 20 Amp fuse located in cavity A of the PDC.

Ground for the sunroof is provided on circuit Z1. This ground terminates at the Airbag Control Module (ACM) bracket.

When the operator selects the OPEN function, voltage is provided on the Q41 circuit from the control module through the CLOSED switch and to the Q44 circuit. Circuit Q44 is the switched ground back to the control module.

The control module then activates the motor and moves the sunroof to the desired position. A position sensor is used to prevent the sunroof from being moved too far in any one direction. When the sensor detects the roof is at the end of its travel it sends a signal to the control module and voltage is shut off to the motor.

When the operator selects the CLOSE function, voltage is provided on the Q42 circuit from the control module through the CLOSED switch and to the Q44 circuit. Circuit Q44 is the switched ground back to the control module.

The control module then activates the motor and moves the sunroof to the desired position. A position sensor is used to prevent the sunroof from being moved too far in any one direction. When the sensor detects the roof is at the end of its travel it sends a signal to the control module and voltage is shut off to the motor.

When the operator selects the VENT function, voltage is provided on the Q43 circuit from the control module through the CLOSED switch and to the Q44 circuit. Circuit Q44 is the switched ground back to the control module.

The control module then activates the motor and moves the sunroof to the desired position. A position sensor is used to prevent the sunroof from being moved too far in any one direction. When the sensor detects the roof is at the end of its travel it sends a signal to the control module and voltage is shut off to the motor.