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Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis >> Body & Frame >> Fixed And MOVEABLE Windows >> Diagnostic Information and Procedures >> Power Windows Malfunction >> Circuit/System Verification
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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. 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 

      Replace the component: S79D Window Switch - Driver

    • 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 - Test all positions of the switch and verify that all according functions work properly.
    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • If the specified state 
  11. Operate the component: S79LR Window Switch - Left Rear - Pulled=Up & Release

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

    1. Operate the component: S79LR Window Switch - Left Rear-Pressed & Pulled

      Verify the component works as specified:

      • M74LR Window Motor - Left Rear =Up
      • M74LR Window Motor - Left Rear =Express Up
      • M74LR Window Motor - Left Rear =Down
      • M74LR Window Motor - Left Rear =Express Down
    • If not the specified state 

      Refer to Circuit/System Testing - Test 1

    • If the specified state 
  12. 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

    • If the specified state 
  13. Operate the component: S79RR Window Switch - Right Rear - Pulled=Up & Release

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

    1. Operate the component: S79RR Window Switch - Right Rear - Test all positions of the switch and verify that all according functions work properly.
    • M74RR Window Motor - Right Rear =Up
    • M74RR Window Motor - Right Rear =Express Up
    • M74RR Window Motor - Right Rear =Down
    • M74RR Window Motor - Right Rear =Express Down
    • If not the specified state 

      Refer to Circuit/System Testing - Test 5

    • If the specified state 
  14. All OK.
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