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Circuit/System Testing

WARNING: This page is about a different car, the 2011 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the S88 sunroof tilt switch.
  2. Test for less than 10 Ω between the ground circuit terminal 1 and ground.
    • If greater than the specified value, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool sunroof tilt switch is short to battery.
    • If not the specified value, test the signal circuit terminal 4 for a short to ground. If the circuit tests normal, replace the K61 sunroof control module.
  4. Install a 5 A fused jumper wire between the signal circuit terminal 4 and the ground circuit terminal 1. Verify the scan tool sunroof tilt switch is short to ground.
    • If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K61 sunroof control module.
  5. If all circuits test normal, test or replace the S88 sunroof tilt switch.
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