Audio And Visual System (W/O Navigation System) Mute Signal Circuit Between Radio Receiver And Multi-Media Interface Ecu

Audio Visual Telematics. Land Cruiser. Urj200, 202 Grj200 Vdj200
Audio Video. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT RADIO RECEIVER ASSEMBLY

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - MULTI-MEDIA INTERFACE ECU)

INSPECT MULTI-MEDIA INTERFACE ECU

AUDIO AND VISUAL SYSTEM (w/o Navigation System) - Mute Signal Circuit between Radio Receiver and Multi-media Interface ECU


DESCRIPTION

The multi-media interface ECU sends a mute signal to the radio receiver assembly.
The radio receiver assembly controls the volume according to the mute signal from the multi-media interface ECU.
The mute signal is sent to reduce noise and popping sounds generated when switching modes.
If there is an open in the circuit, noise can be heard from the speakers when changing the sound source.
If there is a short in the circuit, even though the radio receiver assembly is functioning, no sound, or only an extremely faint sound, can be heard.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Audio Video.Audio And Visual System (For Radio Receiver Type).Audio And Visual System (W/O Navigation System) Mute Signal Circuit Between Radio Receiver And Multi-Media Interface Ecu


INSPECTION PROCEDURE

1.INSPECT RADIO RECEIVER ASSEMBLY


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Audio Video.Audio And Visual System (For Radio Receiver Type).Audio And Visual System (W/O Navigation System) Mute Signal Circuit Between Radio Receiver And Multi-Media Interface Ecu

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    F55-6 (MUTE) - Body ground
    		Engine switch on (ACC), USB audio system is playing → Mode is changing
    		Above 2.5 V → Below 0.5 V
    Text in Illustration
    *1
    		Component with harness connected
    (Radio Receiver Assembly)


NG
Go to step 2
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)

2.CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - MULTI-MEDIA INTERFACE ECU)

  1. Disconnect the F55 radio receiver assembly and L40 multi-media interface ECU connectors.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    F55-6 (MUTE) - L40-6 (MUTI)
    		Always
    		Below 1 Ω
    F55-6 (MUTE) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.INSPECT MULTI-MEDIA INTERFACE ECU


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Audio Video.Audio And Visual System (For Radio Receiver Type).Audio And Visual System (W/O Navigation System) Mute Signal Circuit Between Radio Receiver And Multi-Media Interface Ecu

  1. Reconnect the L40 multi-media interface ECU connector.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    L40-6 (MUTI) - Body ground
    		Engine switch on (ACC)
    		Above 2.5 V
    Text in Illustration
    *1
    		Component with harness connected
    (Multi-media Interface ECU)


NG
REPLACE MULTI-MEDIA INTERFACE ECU (Click here)
OK

REPLACE RADIO RECEIVER ASSEMBLY (Click here)