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AV U121A AV CONTROL UNIT AV-615 < DTC/CIRCUIT DIAGNOSIS > [BOSE AUDIO WITH NAVIGATION] C D E F G H I J K L M B A O P U121A AV CONTROL UNIT Description INFOID:0000000005528719 Replace the AV control unit if this DTC is displayed. Refer to DTC Logic INFOID:0000000005528720 Part name Description AV CONTROL UNIT • Integrates hard disk drive (HDD) allowing map data and music data to be stored. • It is the master unit of the MULTI AV system, and it is connected to each control unit by communication. It operates each system according to communication • The AV control unit includes the audio, hands-free phone, voice control, navi- gation, satellite radio, and vehicle information functions. • It is connected to ECM, A/C auto amp. and combination meter via CAN com- munication to obtain necessary information for the vehicle information function. • It is connected to BCM via CAN communication transmitting/receiving for the vehicle settings function. • It inputs the illumination signals that are required for the display dimming con- trol. • It inputs the signals for driving status recognition (vehicle speed, reverse and parking brake). • Update of map data is performed with the CONSULT-III and the applicable ca- ble. • It includes the TEL adapter and Bluetooth ™ function. DTC Display contents of CONSULT-III DTC Detection Condition Action to take U121A HDD-WRITE Internal malfunction of AV control unit (HDD write mal- Replace AV control unit. |