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Home >> Buick >> 2020 >> Envision Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 193 (Driver Assistance Systems) >> Diagnostic Information and Procedures >> DTC B172E or B172F >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition - On/Vehicle - In Service Mode
  2. Perform the scan tool function: Driver Seat Cushion Left Rear Haptic Movement & Driver Seat Cushion Right Rear Haptic Movement - On and Off

    Verify the component produces a vibration that can be heard and felt.

    • If the component does not activate 

      Refer to: Circuit/System Testing

    • Go to next step: If the component activates 
  3. All OK.