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Home >> Buick >> 2016 >> Envision >> Repair and Diagnosis >> External Pages >> Different car >> Section 56 (Secondary And Configurable Customer Control System) >> Diagnostic Information and Procedures >> DTC B3622: Steering Wheel Controls >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2015 Buick LaCrosse. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify all the associated primary controls on the radio (Volume, Mute, Seek, etc.) operate properly.
    • If all of the primary controls function properly 
  3. Verify all functions on the S70R Steering Wheel Controls Switch - Right operate properly.
    • If some, but not all, functions on the S70R Steering Wheel Controls Switch - Right do not operate 

      Test or replace the S70R Steering Wheel Controls Switch - Right

    • If all functions on the S70R Steering Wheel Controls Switch - Right do not operate 

      Refer to S70R Steering Wheel Controls Switch - Right Malfunction in Circuit/System Testing with UV6 or without UV6.

    • If all functions on the S70R Steering Wheel Controls Switch - Right operate properly 
  4. Verify the voice and mute functions of the S70L Steering Wheel Controls Switch - Left operate properly.
    • If either the voice or mute function does not operate from the S70L Steering Wheel Controls Switch - Left 

      Refer to S70L Steering Wheel Controls Switch - Left Malfunction in Circuit/System Testing.

    • If both the voice and mute functions of the S70L Steering Wheel Controls Switch - Left operate properly 
  5. All OK.
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