• The on-board diagnostic function consists of the following functions: A malfunction detection function, which detects overall malfunctions in the audio system-related parts; a memory function, which stores detected DTCs; and a display function, which indicates system malfunctions via a DTC display.
• If the audio unit detects a malfunction in the audio system, a maximum of 3 DTCs are recorded in the audio unit. If 3 DTCs have already been stored and an additional malfunction is detected, the oldest DTC of the 3 already stored is cleared and it is replaced with the DTC for the most current malfunction.
• There are two methods for reading and clearing DTCs. They include activation of the on-board diagnostic test mode of the on-board diagnostic function, which is operated using the audio unit, and the M-MDS. The displayed DTCs differ depending on whether the on-board diagnostic test mode or the M-MDS method is used. Additionally, because some DTCs are not displayed in the on-board diagnostic test mode, use the M-MDS before performing the procedure.
On-board diagnostic test mode
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― To display DTCs on the display that have been recorded in the memory function, activate the on-board diagnostic function by operating the audio unit.
Using the M-MDS
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― When a DTC inspection is performed using the M-MDS, the malfunction diagnostics for the audio system is initiated. A maximum of 5 DTCs detected by the malfunction diagnostics are displayed.