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Circuit/System Testing

WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

Sunroof System Test 

  1. Ignition OFF, disconnect the harness connector at the sunroof motor.
  2. Test for less than 5.0 Ω between the ground circuit terminal A and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Test for infinite resistance between the control circuit terminal C and ground.
    • If less than the specified value, test the control circuit for a short to ground. If the circuit tests normal, test or replace the sunroof switch.
  4. Test for infinite resistance between the control circuit terminal D and ground.
    • If less than the specified value, test the control circuit for a short to ground. If the circuit tests normal, test or replace the sunroof switch.
  5. Disconnect the harness connector at the sunroof switch.
  6. Test for less than 5.0 Ω between the ground circuit terminal A and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  7. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal E 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, replace the sunroof motor.
  8. Connect the sunroof switch. Connect a test lamp between control circuit terminal C and ground.
  9. Press and release the sunroof close switch. The test lamp should turn ON and OFF.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, test or replace the sunroof switch.
    • If the test lamp is always OFF, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the sunroof switch.
  10. Connect a test lamp between control circuit terminal D and ground.
  11. Press and release the sunroof open switch. The test lamp should turn ON and OFF.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, test or replace the sunroof switch.
    • If the test lamp is always OFF, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the sunroof switch.
  12. Connect a test lamp between control circuit terminal B and ground.
  13. Press and release the sunroof vent switch. The test lamp should turn ON and OFF.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, test or replace the sunroof switch.
    • If the test lamp is always OFF, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the sunroof switch.
  14. If all circuits test normal, replace the sunroof motor.
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