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Home >> Buick >> 2018 >> Enclave Base >> Repair and Diagnosis (Single Page) >> Body & Frame >> Windows >> Fixed And MOVEABLE Window System >> Diagnostic Information and Procedures >> Power Windows Malfunction (Without Express Up/Down Windows) >> 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 works as specified: M74D Window Motor - Driver = Up & Down

    • If the component does not work as specified 

      Refer to: Circuit/System Testing - Test 1

    • Go to next step: If the component works as specified 
  3. Perform the scan tool control function: Passenger Window Motor - Up & Down

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

    • If the component does not work as specified 

      Refer to: Circuit/System Testing - Test 2

    • Go to next step: If the component works as specified 
  4. 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 the component does not work as specified 

      Refer to: Circuit/System Testing - Test 3

    • Go to next step: If the component works as specified 
  5. 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 the component does not work as specified 

      Refer to: Circuit/System Testing - Test 4

    • Go to next step: If the component works as specified 
  6. 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

    • Go to next step: If the specified state 
  7. Operate the component: S79D Window Switch - Driver - Left Rear Window Switch

    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

    • Go to next step: If the specified state 
  8. Operate the component: S79D Window Switch - Driver - Right Rear Window Switch

    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

    • Go to next step: If the specified state 
  9. Operate the component: S79D Window Switch - Driver - Right Front Window Switch

    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

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