CHASSIS ELECTRICAL –
Multi-center Display <Middle Grade>
54A-68
2.
Diagnosis Function for Audio System
Audio system has the following diagnosis function.
Function
Contents
Speaker diagnosis function
This function checks if the speakers are all working normally on the audio system or
not.
Service functions
(1) Check the LCD segments
(2) Check the sensors
(3) Check units connected
into audio system
There are the following 3 diagnosis modes available.
The LCD segments for display available to light on or not.
Outside temperature, voltage of fuel gauge unit and battery, remaining fuel level, fuel
economy calculated after refuelling.
Units connected on display
Voltage on terminal for MUT-
II
Engine speed signal, which is sent by ECU
Oscillation of internal clock
3.
Speaker Connection Diagnosis
Outline
D
This diagnosis function checks whether the more than one wired speakers are normally connected
to the audio unit and the speaker wiring is pinched in the vehicle.
D
The test tone sounds from an applicable speaker according to the display (FL, FR, RL, RR).
Function explanation
To diagnose speaker connections, follow the procedure below to enter the test mode.
1.
Entry to test mode
(1) Turn the ignition switch to ACC.
(2) Turn off the power supply switch of the audio unit.
(3) Press the “CH1” button.
(4) Press the “Automatic tuning in down button.”
(5) Press the “Automatic tuning in up button.”
(6) Press the “CH6” button. Then the audio unit will enter the test mode.
NOTE
The above operation must be finished within 60 seconds after the power supply switch is turned
off (If 60 seconds have passed, the operation is invalid).
If you fail in the operation, you must push the power supply switch twice to reset the unit. Then
repeat the steps above from step (1).
(7) The test tone will sound at a constant interval. If you want to change an applicable speaker, you
should press the “CH6” button.
2.
Cancelling the test mode
The test mode will be canceled by one of the operations below.
D
Press any button (except the “CH6” button). In addition, if a mode button (LW/MW/LW, CD, TAPE)
is pressed, the audio unit will enter an applicable function after cancelling the test mode.
D
Turn the ignition switch to OFF(LOCK).