ON-BOARD DIAGNOSTIC SYSTEM FUNCTION

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On-board Diagnostic Function


Malfunction Detection Function

•  Detects malfunctions in the audio unit.


Memory Function

•  Converts a malfunction detected by the malfunction detection function to a DTC and stores it. Up to three DTCs can be stored. If a malfunction is detected with three DTCs already stored, the oldest DTC is cleared and the new DTC is stored.
•  The stored DTCs are not cleared even if the ignition switch is turned to the lock position or the negative battery cable is disconnected. For clearing the stored malfunction contents, refer to the Workshop Manual. (See MEMORY CLEARING PROCEDURE.)


Display Function

•  When the on-board diagnostic function is activated, DTCs stored by the memory function are displayed on the LCD screen. The DTCs consist of the following:
―  Device code (malfunction location)
―  Error code (malfunction contents)
―  Supplier code (supplier name)
•  For the display method, refer to the Workshop Manual. (See STARTING PROCEDURE FOR ON-BOARD DIAGNOSTIC TEST MODE.)
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Device code

Device name
09
Audio unit
10
MP3 applicable CD player
21
Center panel
22
MP3 applicable CD changer

Error code

Malfunction contents
01
Mechanical malfunction
02
Servo malfunction
07
Disc reading error
10
BUS line (communication line) error
17
Incompatible destination
18
Unsupported cover
19
Communication error between panels
20
Improper power supply voltage
21
Amplifier related circuit
22
Tuner error

Supplier code

Supplier name
01
SANYO Automedia
02
Panasonic
03
Clarion
04
Pioneer

Screen display

System malfunction location

DTC

(When starting on-board diagnostic function)

Error message

(When error is found)
09:Er20
―
Power supply circuit to audio unit
09:Er21
―
Audio unit (peripheral circuit for power amplifier)
09:Er22
―
Audio unit (peripheral circuit for tuner)
10:Er01
―
MP3 applicable CD player system
10:Er02
CHECK CD
MP3 applicable CD player system
10:Er07
CHECK CD
MP3 applicable CD player system
10:Er10
―
MP3 applicable CD player system
21:Er17
―
Center panel
21:Er18
―
Center panel
21:Er19
―
Center panel
22:Er01
―
MP3 applicable CD changer system
22:Er02
CHECK CD
MP3 applicable CD changer system
22:Er07
CHECK CD
MP3 applicable CD changer system
22:Er10
―
MP3 applicable CD changer system
no:Err
―
No DTC is stored


Diagnostic Assist Function

•  Displays the operation condition of the following functions (parts) on the LCD or forces the operation to examine the functions (parts).
•  For start-up methods of each mode, refer to the Workshop Manual. (See DIAGNOSTIC ASSIST FUNCTION.)

LCD display

•  Illuminates all the characters on the LCD and checks if they are not truncated or faint.
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Switch

•  Activates a buzzer sound when a switch is operated and examines each of the switches.
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Speaker

•  Verifies that the speakers output sound in the following order and examines the speakers and wiring harness between the audio unit and speaker.
1.  Front door speaker (LH) and tweeter (LH)
2.  Front door speaker (RH) and tweeter (RH)
3.  Rear door speaker (5HB) (RH)/rear speaker (RH) (3HB)
4.  Rear door speaker (5HB) (LH)/rear speaker (LH) (3HB)


Radio

•  Displays the radio reception status on the LCD and examines the center roof antenna, antenna feeder, and audio unit (tuner). (Display example when receiving AM 522kHz)
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Center panel

•  Displays the destination code of the center panel on the LCD and examines the destination of the center panel.
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