Audio And Visual System (W/O Navigation System) Mute Signal Circuit Between Radio Receiver And Stereo Component Amplifier

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY

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

INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY (OUTPUT SIGNAL)

AUDIO AND VISUAL SYSTEM (w/o Navigation System) - 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. Because of that, 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, 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 Stereo Component Amplifier


INSPECTION PROCEDURE

1.INSPECT STEREO COMPONENT AMPLIFIER 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 Stereo Component Amplifier

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    F18-1 (MUTE) - Body ground
    		Engine switch on (ACC), audio system is playing → Changing sources
    		Above 2.5 V → Below 0.5 V
    Text in Illustration
    *1
    		Component with harness connected
    (Stereo Component Amplifier 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 - STEREO COMPONENT AMPLIFIER)

  1. Disconnect the F1 radio receiver assembly and F18 stereo component amplifier assembly connectors.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    F1-7 (MUTE) - F18-1 (MUTE)
    		Always
    		Below 1 Ω
    F1-7 (MUTE) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY (OUTPUT SIGNAL)


    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 Stereo Component Amplifier

  1. Reconnect the F18 stereo component amplifier assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    F1-7 (MUTE) - Body ground
    		Engine switch on (ACC), audio system is playing
    		Above 2.5 V
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to Radio Receiver Assembly)


NG
REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY (Click here)
OK

REPLACE RADIO RECEIVER ASSEMBLY (Click here)