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AV U121A AV CONTROL UNIT AV-481 < DTC/CIRCUIT DIAGNOSIS > [NAVIGATION (TWIN MONITOR)] C D E F G H I J K L M B A O P U121A AV CONTROL UNIT DTC Logic INFOID:0000000005474802 Diagnosis Procedure INFOID:0000000005474803 1. CHECK MUSIC BOX FUNCTION Is music box function normal? YES >> Malfunction may be detected transitory. NO >> Replace AV control unit. Refer to DTC Display contents of CONSULT-III DTC detection condition Possible malfunction factor U121A HDD WRITE AV control unit malfunction is detected. • If the music box function has no malfunctions, then there is a possi- • Replace the AV control unit if the malfunction occurs constantly. |