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Home >> Buick >> 2017 >> Cascada 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

    • Go to next step: If the specified state 
  3. S79D Window Switch - Driver - No Button 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 

      Replace the component: S79D Window Switch - Driver

    • Go to next step: If the specified state 
  4. Operate the component:Driver Left Front Window Switch - Pulled = Up & Release

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

    1. Operate the component: Driver Left Front Window Switch - Pressed & Pulled

      Verify the component works as specified:

    • M74D Window Motor - Driver = Up
    • M74D Window Motor - Driver = Express Up
    • M74D Window Motor - Driver = Down
    • M74D Window Motor - Driver = Express Down
    • If not the specified state 

      Refer to: Circuit/System Testing - Test 2

    • Go to next step: 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 

      Replace the component: S79D Window Switch - Driver

    • Go to next step: 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 

      Replace the component: S79D Window Switch - Driver

    • Go to next step: 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 

      Replace the component: S79D Window Switch - Driver

    • Go to next step: If the specified state 
  8. Perform the scan tool control function: Passenger Window Motor - Up & Down

    Verify the component operates in both directions: M74P Window Motor - Passenger

    • If not the specified state 

      Refer to: Circuit/System Testing - Test 1

    • Go to next step: If the specified state 
  9. Operate the component: S79P Window Switch - Passenger - Pulled = Up & Release

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

    1. Operate the component: S79P Window Switch - Passenger - Pressed & Pulled

      Verify the component works as specified:

    • M74P Window Motor - Passenger = Up
    • M74P Window Motor - Passenger = Express Up
    • M74P Window Motor - Passenger = Down
    • M74P Window Motor - Passenger = Express Down
    • If not the specified state 

      Refer to: Circuit/System Testing - Test 3

    • Go to next step: If the specified state 
  10. Perform the scan tool control function: Left Rear Window Motor - Up & Down

    Verify the component operates in both directions: M74LR Window Motor - Left Rear

    • If not the specified state 

      Refer to: Circuit/System Testing - Test 1

    • Go to next step: If the specified state 
  11. Perform the scan tool control function: Right Rear Window Motor - Up & Down

    Verify the component operates in both directions: M74RR Window Motor - Right Rear

    • If not the specified state 

      Refer to: Circuit/System Testing - Test 1

    • Go to next step: If the specified state 
  12. Operate the component: S134 Folding Top/Global Window Switch - Pressed & Pulled

    Verify the component works as specified:

    • M74D Window Motor - Driver = Express Up & Express Down
    • M74P Window Motor - Passenger = Express Up & Express Down
    • M74LR Window Motor - Left Rear = Express Up & Express Down
    • M74RR Window Motor - Right Rear = Express Up & Express Down
    • If not the specified state 

      Refer to: Circuit/System Testing - Test 4

    • Go to next step: If the specified state 
  13. All OK.
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