AV Control Unit Self Diagnosis Results

Only Unit Part Is Displayed In Red
Screen switch	Description	Possible cause
Control unit	Malfunction is detected in AV control unit power supply or ground circuit.	AV control unit power supply or ground circuits. Refer to AV CONTROL UNIT . If no malfunction is detected in AV control unit power supply and ground circuits, replace AV control unit. Refer to AV CONTROL UNIT .

A Connecting Cable Between Units Is Displayed In Yellow
Area with yellow connection lines	Description	Possible cause
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. Refer to U1243 DISPLAY UNIT .
Control unit ↔ SAT	When any of the following is detected: satellite radio tuner power supply or ground circuit malfunction. communication circuit malfunction between AV control unit and satellite radio tuner. request signal circuit malfunction between AV control unit and satellite radio tuner.	Satellite radio tuner power supply or ground circuits. Refer to POWER SUPPLY AND GROUND CIRCUIT . Communication circuit between AV control unit and satellite radio tuner. Refer to U1255 SATELLITE RADIO TUNER . Request signal circuit between AV control unit and satellite radio tuner. Refer to U1255 SATELLITE RADIO TUNER .
Control unit ↔ BTHF	When any of the following is detected: Bluetooth® control unit power supply or ground circuit malfunction. AV communication circuit malfunction between AV control unit and Bluetooth® control unit.	Bluetooth® control unit power supply or ground circuits. Refer to BLUETOOTH® CONTROL UNIT . AV communication circuits between AV control unit and Bluetooth® control unit.