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Circuit/System Verification

WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, observe the scan tool Driver LF Window Switch, Driver RF Window Switch, Driver LR Window Switch and Driver RR Window Switch parameters while using each window switch on the driver master control. The parameters should change from Off, Up, Down, Express Up, and Express Down.
    • If the values do not change, replace the DDM.
  2. Observe the scan tool Passenger Window Switch parameters while using the front passenger window switch. The parameters should change from Off, Up, Down, Express Up, and Express Down.
    • If the values do not change, replace the PDM.
  3. Observe the scan tool Window Lockout Switch parameter while pressing and depressing the lockout switch on the driver master control. The parameter should change between On and Off.
    • If the value does not change, replace the DDM.
  4. Observe the operation of each power window while commanding each window UP and DOWN by using the power window switches on each door. Each power window should perform the UP and DOWN command.
    • If either rear passenger power window switch is inoperative, refer to Circuit/System Testing  for Rear Passenger Window Switch Malfunction.
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