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Home >> Chevrolet >> 2025 >> Traverse Z71 >> Repair and Diagnosis >> Body & Frame >> Fixed And MOVEABLE Windows >> Diagnostic Information And Procedures >> DTC B1956 >> Circuit/System Verification

Circuit/System Verification

  1. Ignition On
  2. Verify The M74D Front Side Door Window Regulator Motor - Driverperforms The Up And Down Functions While Pressing And Pulling The Appropriate Switch On The S79D Front Side Door Window Control Switch - Driver
    • If The Up And Down Functions Do Not Work 

      Replace The Component: M74D Front Side Door Window Regulator Motor - Driver

    • Go To Next Step: If The Up And Down Functions Work 
  3. Command The Appropriate M74 Front Side Door Window Regulator Motor Down By Pressing The Window Switch On The S79D Front Side Door Window Control Switch - Driver

    Verify The M74D Front Side Door Window Regulator Motor - Driver Performs The Express Up Function While Pulling And Releasing The Window Switch On The S79D Front Side Door Window Control Switch - Driver

    • If The M74D Front Side Door Window Regulator Motor - Driverdoes Not Perform The Express Up Function 

      Normalize The M74 Front Side Door Window Regulator Motor, Refer To window Motor Programming - Express Function .

    • Go To Next Step: If The M74D Front Side Door Window Regulator Motor - Driver Performs The Express Up Function 
  4. Ignition Off And All Vehicle Systems Off. It May Take Up To 2 Minutes For All Vehicle Systems To Power Down.
  5. Ignition On
  6. Command The M74D Front Side Door Window Regulator Motor - Driver Down By Pressing The Window Switch On The S79D Front Side Door Window Control Switch - Driver
  7. Verify The M74D Front Side Door Window Regulator Motor - Driverperforms The Express Up Function While Pulling And Releasing The Window Switch On The S79D Front Side Door Window Control Switch - Driver
    • If The M74D Front Side Door Window Regulator Motor - Driverdoes Not Perform The Express Up Function 

      Replace The Component: M74D Front Side Door Window Regulator Motor - Driver

    • Go To Next Step: If The M74D Front Side Door Window Regulator Motor - Driver Motor Performs The Express Up Function 
  8. All Ok.