Circuit/System Verification

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 the scan tool Steering Wheel Control Switches parameter changes when pressing the S70R Steering Wheel Controls Switch - Right buttons.
- If the parameter does not change for some of the S70R Steering Wheel Controls Switch - Right switches
  Replace S70R Steering Wheel Controls Switch - Right.
- If the parameter does not change for all of the S70R Steering Wheel Controls Switch - Right switches
  Refer to S70R Steering Wheel Controls Switch Circuit/System Testing.
- Go to next step: If the parameter changes for all S70R Steering Wheel Controls Switch - Right buttons
Verify the scan tool Steering Wheel Control Switches parameter changes between Volume Up and Volume Down when depressing the S70F Steering Wheel Controls Switch - Radio Volume switch.
- If the parameter does not change
  Refer to S70F Steering Wheel Controls Switch - Radio Volume Circuit/System Testing.
- Go to next step: If the parameter changes
Verify the scan tool Steering Wheel Control Switches parameter changes between Next Preset and Previous Preset when depressing the S70E Steering Wheel Controls Switch - Radio Presets switch.
- If the parameter does not change
  Refer to S70E Steering Wheel Controls Switch - Radio Presets Circuit/System Testing.
- Go to next step: If the parameter changes
All OK.