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Home >> Buick >> 2021 >> Envision Essence, AWD >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Vehicle Access System >> Diagnostic Information and Procedures >> Exterior Door Handle Switch Malfunction >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition - On/Vehicle - In Service Mode
  2. Verify the scan tool parameter: Left Front Door Exterior Lock/Unlock Switch Status = 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: B27LF Front Side Door Outside Handle Switch - Left - Pressed

    Verify the scan tool parameter: Left Front Door Exterior Lock/Unlock Switch Status = Active

    • If not the specified state 

      Refer to Circuit/System Testing - Test 1

    • Go to next step: If the specified state 
  4. Verify the scan tool parameter: Right Front Door Exterior Lock/Unlock Switch Status = Inactive
    • If not the specified state 

      Refer to Circuit/System Testing - Test 2

    • Go to next step: If the specified state 
  5. Operate the component: B27RF Front Side Door Outside Handle Switch - Right - Pressed

    Verify the scan tool parameter: Right Front Door Exterior Lock/Unlock Switch Status = Active

    • If not the specified state 

      Refer to Circuit/System Testing - Test 2

    • Go to next step: If the specified state 
  6. Verify the scan tool parameter: Left Rear Door Exterior Lock/Unlock Switch Status = Inactive
    • If not the specified state 

      Refer to Circuit/System Testing - Test 3

    • Go to next step: If the specified state 
  7. Operate the component: A24LR Rear Side Door Outside Handle - Left - Pressed

    Verify the scan tool parameter: Left Rear Door Exterior Lock/Unlock Switch Status = Active

    • If not the specified state 

      Refer to Circuit/System Testing - Test 3

    • Go to next step: If the specified state 
  8. Verify the scan tool parameter: Right Rear Door Exterior Lock/Unlock Switch Status = Inactive
    • If not the specified state 

      Refer to Circuit/System Testing - Test 4

    • Go to next step: If the specified state 
  9. Operate the component: A24RR Rear Side Door Outside Handle - Right - Pressed

    Verify the scan tool parameter: Right Rear Door Exterior Lock/Unlock Switch Status = Active

    • If not the specified state 

      Refer to Circuit/System Testing - Test 4

    • Go to next step: If the specified state 
  10. A fault is not currently present and may be an intermittent condition
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