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Home >> Buick >> 2019 >> Envision Base >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Vehicle Access System >> Diagnostic Information and Procedures >> DTC B396C or B396D - Liftgate Interior Release Open/Close Switch Malfunction >> Circuit/System Verification

Circuit/System Verification

  1. Ignition - On / Vehicle - In Service Mode
  2. Verify the scan tool parameter: Liftgate Front Control Switch = Inactive
    • If not the specified state 

      Refer to: Circuit/System Testing - Test 1

    • Go to next step: If the specified state 
  3. Operate the component: S45B Liftgate Control Switch - Interior - Pressed

    Verify the scan tool parameter: Liftgate Front Control Switch = Active

    • If not the specified state 

      Refer to: Circuit/System Testing - Test 1

    • Go to next step: If the specified state 
  4. Operate the component: S45B Liftgate Control Switch - Interior - Select each position: Off/3/4/Max

    Verify the scan tool parameter: Liftgate Mode Switch = Off & 3/4 & Maximum

    • If the parameter value does not change 

      Refer to: Circuit/System Testing - Test 2

    • Go to next step: If the parameter value changes 
  5. All OK.
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