A Connecting Cable Between Units Is Displayed In Yellow.

Area with yellow connection lines	Description	Possible malfunction location / Action to take
Control unit ==> Front Display	Malfunction is detected in serial communication circuits between AV control unit and display unit.	Serial communication circuits between AV control unit and display unit.
Control unit ==> SAT	When either one of the following items is detected: Satellite radio tuner power supply and ground circuit malfunction is detected. malfunction is detected in communication circuits between AV control unit and satellite radio tuner. Malfunction is detected in request signal circuit between AV control unit and satellite radio tuner.	Satellite radio tuner power supply and ground circuit. Communication circuit between AV control unit and satellite radio tuner. Request signal circuit between AV control unit and satellite radio tuner.
Control unit ==> Parking sensor	When either one of the following items is detected: Sonar control unit power supply and ground circuits are malfunctioning. AV communication circuits between AV control unit and sonar control unit are malfunctioning.	Sonar control unit power supply and ground circuits. AV communication circuits between AV control unit and sonar control unit.
Control unit ==> BTHF	TEL adapter unit power supply and ground circuits are malfunctioning. AV communication circuits between AV control unit and TEL adapter unit are malfunctioning.	TEL adapter unit power supply and ground circuits. AV communication circuits between AV control unit and TEL adapter unit.
Control unit ==> Parking sensor Control unit ==> BTHF	AV communication circuits between multifunction switch and sonar control unit are malfunctioning.	AV communication circuits between multifunction switch and sonar control unit.