Power Sunroof Inoperative W/RPO CF5

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

The sunroof system is controlled by the sunroof switch and the sunroof control module/motor assembly, which is also known as the motor/actuator assembly.

The sunroof control module is supplied battery positive voltage at all times through the 15A SUNROOF fuse located in the rear fuse block. Whenever the ignition is turned to RUN or ACCESSORY, or when the retained accessory power (RAP) system is active, the module is also supplied voltage through the accessory voltage circuit and the 10-amp ROOF/HEAT SEAT fuse located in the body control module (BCM). The sunroof control module is grounded through the ground circuit at G302.

The sunroof control module supplies voltage to the contacts of the sunroof switch through the sunroof switch close signal circuit and the sunroof switch open signal circuit. The sunroof control module also supplies ground to the switch contacts through the sunroof switch low reference circuit. When the switch is operated, the contacts and signal circuit for the selected mode are closed to ground, the voltage is pulled low in the module, and the appropriate signal is recognized by the control module. The control module then internally applies battery positive voltage and ground to the appropriate circuits of the reversible power sunroof motor in order to move the sunroof glass panel to the open, close, or vent position.

The sunroof motor and sunroof control module are integral parts of the sunroof motor/actuator assembly and are not service separately.

Schematic Reference

Sunroof Schematics

Connector End View Reference

Power Roof Systems Connector End Views

Description and Operation

Sunroof Description and Operation

Electrical Information Reference

1. With the sunroof in the closed position, press the sunroof open switch. The sunroof should open.
2. With the sunroof in the open position, press the sunroof close switch. The sunroof should close.

1. Ignition OFF, disconnect the harness connector at the sunroof control module.
2. Ignition OFF, test for less than 1.0 ohm of resistance between the ground circuit terminal 1 and ground.

⇒	If greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 3 and ground.

⇒	If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.

4. Verify that a test lamp illuminates between the B+ circuit terminal 6 and ground.

⇒	If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

5. Connect the harness connector at the sunroof control module.
6. Ignition OFF, disconnect the harness connector at the sunroof switch.
7. Ignition OFF, test for less than 1.0 ohm of resistance between the low reference circuit terminal B and ground.

⇒	If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, test or replace the sunroof control module.

8. Ignition ON, test for B+ between the signal circuit terminal C and ground.

⇒	If not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the sunroof control module.

9. Test for B+ between the signal circuit terminal A and ground.

⇒	If not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the sunroof control module.

10. If all circuits test normal, test or replace the sunroof switch.

Sunroof Switch

1. Ignition OFF, disconnect the harness connector at the sunroof switch.
2. Test for infinite resistance between the following terminals at the sunroof switch with the switch in the neutral position:

•	Signal circuit terminal C

•	Signal circuit terminal A

•	Low reference circuit terminal B

⇒	If not the specified value, replace the sunroof switch.

3. Test for less than 2.0 ohms of resistance between the signal circuit terminal C and the low reference circuit terminal B at the sunroof switch with the switch in the Sunroof Open position.

⇒	If greater than the specified range, replace the sunroof switch.

4. Test for less than 2.0 ohms of resistance between the signal circuit terminal A and the low reference circuit terminal B at the sunroof switch with the switch in the Sunroof Close position.

⇒	If greater than the specified range, replace the sunroof switch.

Sunroof Control Module

1. Ignition OFF, disconnect the harness connector at the sunroof switch.
2. Ignition ON, with the sunroof in the open position, install a 5A fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B. The sunroof should begin to close.

⇒	If the sunroof does not close, replace the sunroof control module.

3. With the sunroof in the closed position, install a 5A fused jumper wire between the signal circuit terminal C and the low reference circuit terminal B. The sunroof should begin to open.

⇒	If the sunroof does not open, replace the sunroof control module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.