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Home >> Chevrolet >> 2017 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 66 (Fixed And MOVEABLE Window System) >> Diagnostic Information and Procedures >> DTC B316B, B317A, B318A, or B319A >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify DTC B318A 02 is not set.
    • If the DTC is set 

      Replace the M74LR Window Motor-Left Rear

    • Go to next step: If the DTC is not set 
  3. Verify DTC B319A 02 is not set.
    • If the DTC is set 

      Replace the M74RR Window Motor-Right Rear

    • Go to next step: If the DTC is not set 
  4. 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 S79D Window Switch-Driver:
    • 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.

    • Go to next step: If the parameters change 
  5. Verify the scan tool parameters listed below change when pressing and pulling the driver window control switch on the S79D Window Switch-Driver:
    • Driver Window Main Control Down Switch - Inactive and Active
    • Driver Window Main Control Up Switch - Inactive and Active
    • Driver Window Main Control Express Switch - Inactive and Active
    • If any parameter does not change 

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

    • Go to next step: If all the parameters change 
  6. 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.

    • Go to next step: If all the parameters change 
  7. All OK.
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