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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Body & Frame >> Windows >> Fixed And MOVEABLE Window System >> Diagnostic Information and Procedures >> DTC B316B, B317A, B318A, or B319A: Window Switch >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify the scan tool parameters listed below change when pressing and pulling the switches for the passenger, left rear and right rear window on the driver window master control;
    • Left Rear Main Control Down Switch - Inactive and Active
    • Left Rear Main Control Express Switch - Inactive and Active
    • Left Rear Main Control Up Switch - Inactive and Active
    • Right Rear Main Control Down Switch - Inactive and Active
    • Right Rear Main Control Express Switch - Inactive and Active
    • Right Rear Main Control Up Switch - Inactive and Active
    • Front Passenger Main Control Down Switch - Inactive and Active
    • Front Passenger Main Control Express Switch - Inactive and Active
    • Front Passenger Main Control Up Switch - Inactive and Active
    • If any parameter does not change 

      Replace the S79D Window Switch-Driver.

    • If the parameters change 
  3. Verify the scan tool parameters listed below change when pressing and pulling the driver window control switch on the driver window master control:
    • Driver Window Main Control Down Switch - Inactive and Active
    • Driver Window Main Control Up Switch - Inactive and Active
    • Driver Window Main Control Express Down Switch - Inactive and Active
    • Driver Window Main Control Express Up Switch - Inactive and Active
    • If any parameter does not change 

      Refer to Circuit/System Testing - Driver Window Switch Malfunction.

    • If all the parameters change 
  4. Verify the scan tool Passenger Window Switch at Door parameters change to Inactive, Up, Express Up, Down, Express Down when pressing and pulling the S79P Window Switch-Passenger.
    • If any parameter does not change 

      Refer to Circuit/System Testing - Passenger Window Switch Malfunction.

    • If all the parameters change 
  5. Verify the scan tool parameters listed below change when pressing and pulling the S79LR Window Switch-Left Rear and the S79RR Window Switch-Right Rear.
    • Left Rear Window Switch at Door - Inactive, Up, Express Up, Down, Express Down
    • Right Rear Window Switch at Door - Inactive, Up, Express Up, Down, Express Down
    • If any parameter does not change 

      Test or replace the appropriate S79 Window Switch-Rear.

    • If all the parameters change 
  6. All OK.
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