Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: 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

CAUTION / NOTICE / HINT

NOTICE:

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.

Click here

PROCEDURE

1.

INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

J156-1 (MUTE) - Body ground

Engine switch on (ACC)

Audio system playing

→ Audio system changing modes

2.0 V or higher

→ Below 1 V

*a

Component with harness connected

(Stereo Component Amplifier Assembly)

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

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

(a) Disconnect the J148 radio receiver assembly connector.

(b) Disconnect the J156 stereo component amplifier assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J148-25 (MUT1) - J156-1 (MUTE)

Always

Below 1 Ω

J148-25 (MUT1) or J156-1 (MUTE) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY (OUTPUT SIGNAL)

(a) Reconnect the J156 stereo component amplifier assembly connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

J148-25 (MUT1) - Body ground

Engine switch on (ACC)

Audio system playing

2.0 V or higher

*a

Front view of wire harness connector

(to Radio Receiver Assembly)

OK

REPLACE RADIO RECEIVER ASSEMBLY

NG

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY

    Data Signal Circuit between Radio Receiver and Stereo Jack Adapter
    DESCRIPTION The No. 1 stereo jack adapter assembly sends the sound data signal or image data signal from a USB device to the radio receiver assembly via this circuit. WIRING DIAGRAM PROCEDURE 1. ...

    Mute Signal Circuit between Stereo Component Amplifier and Telematics Transceiver
    DESCRIPTION The DCM (telematics transceiver) sends a mute signal to the stereo component amplifier assembly. The stereo component amplifier assembly controls the volume according to the mute signal fr ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual > Camshaft Position Sensor: Installation
    INSTALLATION PROCEDURE 1. INSTALL VVT SENSOR (for Exhaust Side of Bank 2) (a) Apply a light coat of engine oil to the O-ring of the VVT sensor. NOTICE: If reusing the VVT sensor, be sure to inspect the O-ring. (b) Apply adhesive to 2 or 3 threads at the end of the bolt. Adhesive: Toyota Genuine ...

    Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual > Purge Valve: Removal
    REMOVAL PROCEDURE 1. REMOVE V-BANK COVER SUB-ASSEMBLY Click here 2. REMOVE PURGE VALVE (PURGE VSV) (for TMMC Made) (a) Disconnect the purge valve (purge VSV) connector. *1 No. 1 Fuel Vapor Feed Hose *2 Fuel Vapor Feed Hose (b) Slide the clip and disconnect the fue ...

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

    © 2022 Copyright www.lexusrx.net
    0.0154