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Circuit/System Testing

WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the X1 Q8 control solenoid assembly harness connector at the transmission.
  2. Ignition ON, verify that a test lamp illuminates between the ignition voltage circuits listed below and ground.
    • Terminal 4
    • Terminal 12
      • If the test lamp does not illuminate, test the ignition circuit for a Short to Ground or an Open/High Resistance.
  3. If all circuits test normal, replace the Q8 control solenoid valve assembly.
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