Foreword - Audio

FOREWORD [AUDIO]

- The audio system has an on-board diagnostic function and diagnostic assist function to facilitate audio system diagnosis.

On-board diagnostic function
- 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 three 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.
- DTCs stored in the audio unit are cleared if the negative battery cable is disconnected (if backup power is interrupted).
- 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
- To display DTCs on the information display that have been recorded in the memory function, activate the on-board diagnostic function by operating the audio unit. DTC Inspection - Audio

Using the M-MDS
- When a DTC inspection is performed using the M-MDS, the malfunction diagnostics for the audio system, Bluetooth system (hands-free telephone (HF/TEL system), and the SIRIUS satellite radio system is initiated. A maximum of 5 DTCs detected by the malfunction diagnostics are displayed.

Diagnostic assist function
- The diagnostic assist function is a function for forcibly operating audio system related parts to verify their connection condition and operation status. In addition, the specifications for the audio system related parts are displayed in the information display to enable their verification.