Circuit/System Verification

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

Ignition ON. Verify the driver information center (DIC) illuminates.
- If the DIC does not illuminate
  Test or replace the instrument cluster.
- Go to next step: If the DIC illuminates
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 All Controls Malfunction in Circuit/System Testing.
- 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 Left Controls 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.