Circuit/System Verification

WARNING: This page is about a different car, the 2018 Buick Regal TourX and 2018 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON.
Verify all the associated primary controls on the radio (Volume, Mute, Seek, etc.) operate properly.
- If any of the primary controls do not function properly
  Refer to Symptoms - Entertainment
- Go to next step: If all of the primary controls function properly
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.
- Go to next step: If all functions on the S70R Steering Wheel Controls Switch - Right operate properly
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.
- Go to next step: If both the voice and mute functions of the S70L Steering Wheel Controls Switch - Left operate properly
All OK.