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Home › Chevrolet › 2021 › Traverse L › Repair and Diagnosis › External Pages › Different car › Section 45 (Fixed And MOVEABLE Windows) › Diagnostic Information and Procedures › Power Windows Malfunction › Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2020 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition - On / Vehicle - In Service Mode
  2. Operate the component:Driver Window Switch @ S79D Front Side Door Window Control Switch-Driver - Pressed & Pulled

    Verify the component works as specified:

    • M74D Front Side Door Window Regulator Motor-Driver=Up
    • M74D Front Side Door Window Regulator Motor-Driver =Express Up
    • M74D Front Side Door Window Regulator Motor-Driver=Down
    • M74D Front Side Door Window Regulator Motor-Driver=Express 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. Operate the component:S79P Front Side Door Window Switch - Passenger - Pressed & Pulled

    Verify the component works as specified:

    • M74P Front Side Door Window Regulator Motor-Passenger =Up
    • M74P Front Side Door Window Regulator Motor-Passenger =Express Up
    • M74P Front Side Door Window Regulator Motor-Passenger =Down
    • M74P Front Side Door Window Regulator Motor-Passenger =Express 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. Operate the component:Window Lockout Switch - Pressed

    Verify the scan tool parameter:Left Rear Window Lockout Status=Inactive & Active

    • If the parameter does not change 

      Replace the component:S79D Front Side Door Window Control Switch-Driver

    • Go to next step: If the parameter changes 
  5. Window Lockout Switch=Not Activated
  6. Operate the component:S79LR Rear Side Door Window Switch-Left - Pressed & Pulled

    Verify the component works as specified:

    • M74LR Rear Side Door Window Regulator Motor-Left=Up
    • M74LR Rear Side Door Window Regulator Motor-Left=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 
  7. Operate the component:Window Lockout Switch - Pressed

    Verify the scan tool parameter:Right Rear Window Lockout Status=Inactive & Active

    • If the parameter does not change 

      Replace the component:S79D Front Side Door Window Control Switch-Driver

    • Go to next step: If the parameter changes 
  8. Window Lockout Switch=Not Activated
  9. Operate the component:S79RR Rear Side Door Window Switch-Right - Pressed & Pulled

    Verify the component works as specified:

    • M74RR Rear Side Door Window Regulator Motor-Right=Up
    • M74RR Rear Side Door Window Regulator Motor-Right=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 
  10. Operate the component:Left Rear Window Switch @ S79D Front Side Door Window Control Switch-Driver - Pressed & Pulled

    Verify the component works as specified:

    • M74LR Rear Side Door Window Regulator Motor-Left=Up
    • M74LR Rear Side Door Window Regulator Motor-Left=Down
    • If the component does not work as specified 

      Replace the component:S79D Front Side Door Window Control Switch-Driver

    • Go to next step: If the component works as specified 
  11. Operate the component:Right Rear Window Switch @ S79D Front Side Door Window Control Switch-Driver - Pressed & Pulled

    Verify the component works as specified:

    • M74RR Rear Side Door Window Regulator Motor-Right=Up
    • M74RR Rear Side Door Window Regulator Motor-Right=Down
    • If the component does not work as specified 

      Replace the component:S79D Front Side Door Window Control Switch-Driver

    • Go to next step: If the component works as specified 
  12. Operate the component:Passenger Window Switch @ S79D Front Side Door Window Control Switch-Driver - Pressed & Pulled

    Verify the component works as specified:

    • M74P Front Side Door Window Regulator Motor-Passenger =Up
    • M74P Front Side Door Window Regulator Motor-Passenger =Express Up
    • M74P Front Side Door Window Regulator Motor-Passenger =Down
    • M74P Front Side Door Window Regulator Motor-Passenger =Express Down
    • If the component does not work as specified 

      Replace the component:S79D Front Side Door Window Control Switch-Driver

    • Go to next step: If the component works as specified 
  13. A fault that is not currently present may have been caused by a intermittent condition.
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