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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 34 (Sunroof System) >> Diagnostic Information and Procedures >> Power Sunroof Malfunction >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the S72 Sunroof Switch.
  2. Test for infinite resistance between the following signal circuit terminals and the ignition terminal 2 with the switch in the open position.
    • Terminal 2
    • Terminal 3
    • If less than infinite resistance 

      Replace the S72 Sunroof Switch.

    • If infinite resistance 
  3. Test for less than 5 Ω between the signal terminal 2 and the ignition terminal 2 with the sunroof open switch pressed.
    • If 5 Ω or greater 

      Replace the S72 Sunroof Switch.

    • If less than 5 Ω 
  4. Test for less than 5 Ω between the signal terminal 3 and the ignition terminal 2 with the sunroof close switch pressed.
    • If 5 Ω or greater 

      Replace the S72 Sunroof Switch.

    • If less than 5 Ω 
  5. All OK
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