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Power Sunroof Malfunction

WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the sunroof control module.
  2. Test for less than 5.0 Ω between the ground circuit terminal 4 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 1 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 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 a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, replace the sunroof control module.
  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 Ω between the low reference circuit terminal 5 and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance.
    8. NOTE: 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 did not move in one direction.
  8. Ignition ON, momentarily install a 3 A fused jumper wire between the signal circuit terminal 2 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. With the sunroof in the fully closed position, momentarily install a 3 A fused jumper wire between the signal circuit terminal 3 and ground. The sunroof should vent open.
    • If the sunroof does not vent open, 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.
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