Hint:
Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "suspected area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

Precaution
Problem symptoms table (2006/01- )Making a phone call
To enter the “phone” mode, press the off-hook switch.
Making a phone call
Dialing by inputting a name
Speed dialing
Dialing by entering the number
Dialing from call histories
Receiving a phone call
Answering the phone
Refusing the call
Operations during a call
Transfer ...
Brake warning light does not come on
Wiring diagram
Refer to the brake warning light circuit (see page bc-145).
Inspection procedure
Check can communication system
Check if the can communication system dtc is output
(see page ca-34).
Result
Perform active test by intelligent tester (brake warning light)
...
Speaking on the phone
The following screen is displayed when speaking on the phone.
To adjust the call volume
Select “-” or “+”. You can also adjust the volume using the steering
switches or the volume knob.
To prevent the other party from hearing your voice
Select “mute”.
Inputting tones
When usin ...