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 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 Circuit/System Testing.
- Go to next step: If all functions on the S70R Steering Wheel Controls Switch - Right operate properly
Verify the radio volume increases and decreases when depressing the S70F Steering Wheel Controls Switch - Radio Volume switch.
- If the radio volume does not increase and decrease
  Refer to S70F Steering Wheel Controls Switch - Radio Volume Circuit/System Testing.
- Go to next step: If the radio volume does increase and decrease
Verify the radio next preset and previous preset function when depressing the S70E Steering Wheel Controls Switch - Radio Presets switch.
- If the radio next and previous presets do not function
  Refer to S70E Steering Wheel Controls Switch - Radio Presets Circuit/System Testing.
- Go to next step: If the radio next and previous presets do function
All OK.