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AV-56 < COMPONENT DIAGNOSIS > [AUDIO SYSTEM] U121D AV CONTROL UNIT U121D AV CONTROL UNIT Description INFOID:0000000005146277 Replace the AV control unit if this DTC is displayed. Refer to AV-169, "Removal and Installation" . DTC Logic INFOID:0000000005146278 Part name Description AV CONTROL UNIT • Integrates HDD (hard disk drive) 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 means of communication. It operates each system according to com- • The AV control unit includes the audio, hands-free phone, voice control, navi- gation, and vehicle information functions. • It is connected to ECM and combination meter via CAN communication to ob- tain necessary information for the vehicle information function. • It inputs the automatic brightness ON/OFF signals that are required for the dis- play dimming control. • It inputs the signals for driving status recognition (vehicle speed, reverse and parking brake). DTC Display contents of CONSULT-III DTC Detection Condition Action to take U121D DSP CONN Internal malfunction of AV control unit (DSP connection Replace AV control unit. Refer to 169, "Removal and Installation" . |