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AV-178 < SYSTEM DESCRIPTION > [BOSE AUDIO WITHOUT NAVIGATION] DIAGNOSIS SYSTEM (AV CONTROL UNIT) DIAGNOSIS SYSTEM (AV CONTROL UNIT) Description INFOID:0000000009721719 • The AV control unit diagnosis function starts up with multifunction switch operation and the AV control unit performs a diagnosis for each unit in the system during the on board diagnosis. • Perform a CONSULT diagnosis if the on board diagnosis does not start, e.g., the screen does not display anything, the multifunction switch does not function, etc. On Board Diagnosis Function INFOID:0000000009721720 MULTIFUNCTION SWITCH AND PRESET SWITCH SELF-DIAGNOSIS FUNCTION The ON/OFF operation (continuity) of each switch in the multifunction switch and preset switch can be Self-diagnosis Mode • Press the “BACK” switch and the “UP” switch of the 8-direction switches within 10 seconds after turning the ignition switch from • The continuity of each switch at the ON position can be checked by pressing the switch. The buzzer sounds if the switch is normal. Finishing Self-diagnosis Mode Self-diagnosis mode is canceled when turning the ignition switch OFF. ON BOARD DIAGNOSIS Description • The trouble diagnosis function has a self-diagnosis mode for conducting trouble diagnosis automatically and a confirmation/adjustment mode for operating manually. • Self-diagnosis mode performs the AV control unit diagnosis and the connection diagnosis between each of the units that make up the system, and it indicates the results to the display. • The confirmation/adjustment mode allows the technician to check, modify or adjust the vehicle signals and set values, as well as to monitor the system error records and system communication status. The checking, On Board Diagnosis Item JSNIA1072GB Mode Description Self Diagnosis • AV control unit diagnosis. control unit and each unit. |