The sunroof module supplies each of the sunroof switch signal circuits with a 12-volt reference. When a switch is pressed the signal circuit is pulled low signaling the sunroof open or close request. The module determines the motor direction based on inputs received from the sunroof switch. When the modules reverse the polarity of the applied voltage, the motor reverses direction.

Schematic Reference

Sunroof Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Sunroof Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

1. With the sunroof in the closed position, press the sunroof open switch. The sunroof should vent.
2. With the sunroof in the closed position, press and hold the sunroof open switch for 2 seconds. The sunroof should open.
3. With the sunroof in the open position, press the sunroof close switch. The sunroof should close.

Important: Because of the accessibility of the sunroof switch, perform the sunroof switch component test before beginning the Circuit/System Testing.

1. Ignition OFF, disconnect the harness connector at the sunroof control module.
2. Test for less than 5.0 ohm between the ground circuit terminal 1 and ground.

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

3. 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. If the circuit tests normal and the B+ circuit fuse is open, replace the fuse and replace the sunroof control module.

4. 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 an open/high resistance. If the circuit tests normal, refer to Retained Accessory Power (RAP) Malfunction.

5. Ignition OFF, connect the harness connector at the sunroof control module.
6. Disconnect the harness connector at the sunroof switch.
7. Test for less than 5.0 ohm 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.

Important: Apply ground to the module for no longer than 2 seconds at a time or the module could be damaged.

When performing the following tests, make sure that the sunroof or sunshade is not at its end of travel position by switching the grounded jumper to the other signal circuit if the sunroof or sunshade does not move in one direction.
8. Ignition ON, momentarily install a 10-amp fused jumper wire between the signal circuit terminal C and ground. The sunroof should move.

⇒	If the sunroof does not move, test the signal circuit for a short to ground, short to voltage or an open/high resistance. If the circuit test is normal, replace the sunroof control module.

9. Momentarily install a 10-amp fused jumper wire between the signal circuit terminal A and ground. The sunroof should move.

⇒	If the sunroof does not move, test the signal circuit for a short to ground, short to voltage or an open/high resistance. If the circuit test is normal, replace the sunroof control module.

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

Sunroof Switch

1. With the ignition OFF, disconnect the harness connector at the sunroof switch.
2. Test for infinite resistance between the switch terminals listed below and the low reference terminal B with the switch in the neutral position.

•	Roof open terminal C

•	Roof close terminal A

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

Important: If the switch tests open in any switch position other than Off, test the sunroof switch signal circuits for a short to voltage before replacing the switch.

3. Test for less than 5.0 ohms of resistance between the switch terminals listed below and the low reference terminal B with the switch in the appropriate position.

•	Roof open terminal C

•	Roof close terminal A

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

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.