Audio And Visual System (For Radio And Display Type) Mute Signal Circuit Between Radio Receiver And Stereo Component Amplifier


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY)

CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY (OUTPUT SIGNAL)

AUDIO AND VISUAL SYSTEM (for Radio and Display Type) - Mute Signal Circuit between Radio Receiver and Stereo Component Amplifier


DESCRIPTION

This circuit sends a signal to the stereo component amplifier assembly to mute noise. Due to this, the noise produced by changing the sound source ceases.
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 stereo component amplifier assembly is functioning normally, no sound or only an extremely faint sound can be heard.

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Audio Video.Audio And Visual System (For Radio Receiver Type).Audio And Visual System (For Radio And Display Type) Mute Signal Circuit Between Radio Receiver And Stereo Component Amplifier


INSPECTION PROCEDURE

HINT:
When replacing the radio and display receiver assembly, it is necessary to perform the vehicle contract setting for Connected Services (w/ Connected Services Function).
1.CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Audio Video.Audio And Visual System (For Radio Receiver Type).Audio And Visual System (For Radio And Display Type) Mute Signal Circuit Between Radio Receiver And Stereo Component Amplifier

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    H63-1 (MUTE) - Body ground
    		Ignition switch ACC, audio system playing → audio system changing modes
    		2.0 V or higher → Below 1 V
    Text in Illustration
    *a
    		Component with harness connected
    (Stereo Component Amplifier Assembly)


NG
Go to step 2
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (LandCruiser RM000003YVJ042X.html)

2.CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY)

  1. Disconnect the H51 radio and display receiver assembly connector.

  1. Disconnect the H63 stereo component amplifier assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H51-16 (MUT1) - H63-1 (MUTE)
    		Always
    		Below 1 Ω
    H51-16 (MUT1) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY (OUTPUT SIGNAL)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Audio Video.Audio And Visual System (For Radio Receiver Type).Audio And Visual System (For Radio And Display Type) Mute Signal Circuit Between Radio Receiver And Stereo Component Amplifier

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    H51-16 (MUT1) - Body ground
    		Ignition switch ACC, audio system playing
    		2.0 V or higher
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Radio and Display Receiver Assembly)


NG
REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY (LandCruiser RM000003AI9027X.html)
OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY (LandCruiser RM000003AHY02NX.html)