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Home >> Buick >> 2022 >> Envision Preferred, AWD >> Repair and Diagnosis >> Steering >> Steering Control Systems >> Steering Wheel And Column >> Diagnostic Information and Procedures >> DTC B1A4C >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
    2. NOTE:

    The steering wheel heater will not operate when the steering wheel temperature is above 32°C (89.6°F)

  2. Verify the scan tool Heated Steering Wheel parameter changes between Active and Inactive when cycling the heater steering wheel switch.
    • If the parameter does not change 

      Refer to Circuit/System Testing

    • Go to next step: If the parameter changes 
  3. Verify the scan tool Heated Steering Wheel Internal Temperature parameter changes from Off to Low / Medium / High after a few minutes.
    • If the parameter does not change 

      Refer to Circuit/System Testing

    • Go to next step: If the parameter changes 
  4. A fault is currently not present and may be an intermittent condition.
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