Circuit/System Testing

Power Sunroof Malfunction

1. Ignition OFF, disconnect the harness connector at the sunroof switch.
2. Interior lamps OFF, test for less than 10 ohms of resistance between the ground circuit terminal 5 and ground.
   • If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, connect a 3A fused jumper wire between the following sunroof switch signal circuits and ground. The roof should be inoperative in at least one or more directions.
   • Sunroof switch open signal terminal 8
   • Sunroof switch close signal terminal 2
   • Sunroof switch open vent signal terminal 4
   • Sunroof switch close vent signal terminal 6
   • If the roof moved in all directions, replace the sunroof switch.
4. Disconnect the X310 inline harness connector.
5. Test for less than 1 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.
6. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 3 and ground.
   • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance
7. Ignition ON, verify that a test lamp illuminates between the sunroof enable signal circuit terminal 2 and B+.
   • If the test lamp does not illuminate, test the signal circuit for a short to battery or an open/high resistance. If the circuit tests normal, refer to Retained Accessory Power (RAP) Malfunction .
8. Ignition OFF, connect the X310 inline harness connector.
9. Disconnect the harness connector at the sunroof module.
10. Ignition OFF, test for less than 1 ohm of resistance between the ground circuit terminal 4 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
11. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 1 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for an open/high resistance
12. Ignition ON, verify that a test lamp illuminates between the sunroof enable signal circuit terminal 2 and B+.
    • If the test lamp does not illuminate, test the signal circuit for a short to battery or an open/high resistance.
13. Ignition OFF, connect the harness connector at the sunroof control module.
14. Ignition ON, at the sunroof switch, test for B+ between the sunroof switch signal circuits listed below and ground.
    • Sunroof switch close signal terminal 2
    • Sunroof switch open vent signal terminal 4
    • Sunroof switch close vent signal terminal 6
    • Sunroof switch open signal terminal 8
    • If less than the specified value, test the appropriate signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the sunroof control module.
15. If all circuits test normal, test or replace the sunroof control module.

Power Sunroof Express Feature Malfunction

1. Ignition OFF, disconnect the harness connector at the sunroof switch.
2. Ignition ON, with the sunroof in the closed position, connect a 3A fused jumper wire between the sunroof open signal circuit terminal 8 and the sunroof express signal circuit terminal 7 to ground for less than 1 second. The roof should express open.
   • If the roof did not express open, test the express signal circuit for a short to voltage or an open high resistance. If the circuit tests normal, replace the sunroof control module.
3. Ignition ON, with the sunroof in the closed position, connect a 3A fused jumper wire between the sunroof vent open signal circuit terminal 4 and the sunroof express vent signal circuit terminal 1 to ground for less than 1 second. The roof should express vent open.
   • If the roof did not express vent open, test the express signal circuit for a short to voltage or an open high resistance. If the circuit tests normal, replace the sunroof control module.
4. If all circuits test normal, test or replace the sunroof switch.