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Home >> Buick >> 2017 >> Envision Base >> Repair and Diagnosis >> Body & Frame >> Windows >> Fixed And MOVEABLE Window System >> Diagnostic Information and Procedures >> Power Windows Malfunction >> Circuit/System Verification

Circuit/System Verification

  1. Ignition - On / Vehicle - In Service Mode
  2. Perform the scan tool control function:Driver Window Motor - Up & Down

    Verify the component operates in both directions:M74D Window Motor - Driver

    • If not the specified state 

      Refer to: Circuit/System Testing - Test 1

    • If the specified state 
  3. Operate the component:Driver Left Front Window Switch - Pressed & Pulled

    Verify the component works as specified:M74D Window Motor - Driver =Up/Express Up /Down/Express Down

    • If not the specified state 

      Refer to: Circuit/System Testing - Test 2

    • If the specified state 
  4. S79D Window Switch - Driver - Not Pressed

    Verify the scan tool parameter:

    • Left Rear Window Main Control Down Switch=Inactive
    • Left Rear Window Main Control Express Switch=Inactive
    • Left Rear Window Main Control Up Switch=Inactive
    • Right Rear Window Main Control Down Switch=Inactive
    • Right Rear Window Main Control Express Switch=Inactive
    • Right Rear Window Main Control Up Switch=Inactive
    • Front Passenger Window Main Control Down Switch=Inactive
    • Front Passenger Window Main Control Express Switch=Inactive
    • Front Passenger Window Main Control Up Switch=Inactive
    • If not the specified state 

      Test or replace the component:S79D Window Switch - Driver

    • If the specified state 
  5. Operate the component:S79D Window Switch - Driver-Left Rear Window Switch - Pressed & Pulled

    Verify the scan tool parameter:

    • Left Rear Window Main Control Down Switch=Active
    • Left Rear Window Main Control Express Switch=Active
    • Left Rear Window Main Control Up Switch=Active
    • If not the specified state 

      Test or replace the component:S79D Window Switch - Driver

    • If the specified state 
  6. Operate the component:S79D Window Switch - Driver-Right Rear Window Switch - Pressed & Pulled

    Verify the scan tool parameter:

    • Right Rear Window Main Control Down Switch=Active
    • Right Rear Window Main Control Express Switch=Active
    • Right Rear Window Main Control Up Switch=Active
    • If not the specified state 

      Test or replace the component:S79D Window Switch - Driver

    • If the specified state 
  7. Operate the component:S79D Window Switch - Driver-Right Front Window Switch - Pressed & Pulled

    Verify the scan tool parameter:

    • Front Passenger Window Main Control Down Switch=Active
    • Front Passenger Window Main Control Express Switch=Active
    • Front Passenger Window Main Control Up Switch=Active
    • If not the specified state 

      Test or replace the component:S79D Window Switch - Driver

    • If the specified state 
  8. Operate the component:Window Lockout Switch - Pressed

    Verify the scan tool parameter:Child Security Lock/Window Lockout Switch=ON & OFF

    • If the specified state 
  9. Perform the scan tool control function:Child Security Lock Indicator - On and Off

    Verify the component turns On and Off:Child Security Lock Indicator

    • If the component does not turn On and Off 

      Replace the component:S79D Window Switch - Driver

    • If the component turns On and Off 
  10. Perform the scan tool control function:Passenger Window Motor - Up & Down

    Verify the component works as specified:M74P Window Motor - Passenger =Up & Down

    • If not the specified state 

      Refer to: Circuit/System Testing - Test 3

    • If the specified state 
  11. Perform the scan tool control function:Left Rear Window Motor - Up & Down

    Verify the component works as specified:M74LR Window Motor - Left Rear =Up & Down

    • If not the specified state 

      Refer to: Circuit/System Testing - Test 3

    • If the specified state 
  12. Perform the scan tool control function:Right Rear Window Motor - Up & Down

    Verify the component works as specified:M74RR Window Motor - Right Rear =Up & Down

    • If not the specified state 

      Refer to: Circuit/System Testing - Test 3

    • If the specified state 
  13. Operate the component:Window Lockout Switch - Pressed

    Verify the function:

    • S79LR Window Switch - Left Rear=Disabled
    • S79RR Window Switch - Right Rear=Disabled
    • If the specified state 
  14. All OK.
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