ON-BOARD DIAGNOSTIC SYSTEM FUNCTION [AUDIO SYSTEM]

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Self-diagnostic Function

Malfunction detection function

• The malfunction detection section detects malfunctions occurring in the system.

Memory function

• The memory function detects a malfunction, changes it to a DTC, and stores it in the memory. The memory can store a maximum of three DTCs. If another malfunction is detected when three DTCs are already stored, the memory function clears the oldest DTC and stores the new one.

• Once a DTC is stored, it can only be cleared by the designated procedure; not by turning the ignition switch to the LOCK position or disconnecting the negative battery cable. The procedure is mentioned in the Service Section.

Display function

• When the self-diagnostic function is activated, the information display displays the DTC stored in the memory.

• The DTC consists of the following codes and numbers:

- Part number (indicates malfunctioning part)

- Error code (indicates malfunction description)

- Supplier code (indicates manufacturer)

• Refer to the Service Section for the display method.


Supplier code	Supplier name
1	SANYO Automedia
2	Panasonic
3	Clarion


Parts number	Parts name
00	Cassette deck (lower module)
03	CD player (upper module)
06	CD changer (upper module)
07	MD player (lower module)
09	Base unit


Error code	Malfunction description
01	Internal mechanism error
02	Servo mechanism error
03	Mechanism stuck
07	Disc reading error
08	Blank media
10	BUS line (communication line) error
20	Insufficient power supply
22	Tuner error


Screen display		Malfunction location
DTC	Output signal	Malfunction location
09: Er22	-	Base unit (peripheral circuit)
09: Er20	-	Power supply circuit of base unit
00: Er10	-	Cassette deck-base unit communication line
03: Er10	-	CD player-base unit communication line
06: Er10	-	CD changer (upper module)-base unit communication line
07: Er10	-	MD player-base unit communication line
03: Er01	-	CD player
03: Er02	CHECK CD	CD player
03: Er07	CHECK CD	CD player
00: Er01	-	Cassette deck
00: Er03	-	Cassette deck
00: Er04	CHECK TAPE	Cassette tape
06: Er01	-	CD changer (upper module)
06: Er02	CHECK CD	CD changer (upper module)
06: Er07	CHECK CD	CD changer (upper module)
07: Er01	-	MD player
07: Er02	CHECK MD	MD player
07: Er07	CHECK MD	MD player
07: Er08	CHECK MD	MD
no Err	-	No stored DTCs

Diagnostic Assist Function

• The diagnostic assist function displays the operating condition of the following functions (components) and forces them to operate in order to examine whether they are malfunctioning or not.

• For the start procedure of each mode, refer to the Service Section.

LCD

• The diagnostic assist function illuminates all characters in the LCD to check for truncated or faint characters.

Switch

• The diagnostic assist function sounds the buzzer when the switches are pressed to check the switches.

Speaker

• The diagnostic assist function outputs sound to the speakers in the following order to determine condition of the speakers and wiring harness between the base unit and each speaker.

1. Left front door speaker and tweeter

2. Right front door speaker and tweeter

3. Right rear door speaker and woofer

4. Left rear door speaker and woofer

Radio

• The diagnostic assist function displays the radio reception condition to determine condition of the antenna, antenna feeders, and base unit (tuner).

Audio amplifier (external)

• The diagnostic assist function displays the output state of the audio amplifier operating signal to determine condition of the audio amplifier, base unit, and wiring harness between the base unit and audio amplifier.