Button Inspection
- Switch the ignition to ACC or ON (engine off or on).
- Turn the audio unit power on.
- While pressing the POWER/VOLUME button, press the PRESET button 3 for 0.5 s or more.
- Inspect according to the following table:
Inspection Display Action - Operate all of the switches (press).
- Does the buzzer sound?
- Yes The switch is normal. No Verify the switch. - Switch the audio power supply off or switch the ignition off to end the diagnostic assist function.