Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001E7JF
Model Year Start: 2019 Model: RAV4 Prod Date Range: [11/2018 - 10/2022]
Title: NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: Mute Signal Circuit between Radio Receiver and Stereo Component Amplifier; 2019 - 2022 MY RAV4 RAV4 HV [11/2018 - 10/2022]

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 normally, no sound or only an extremely faint sound can be heard.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When replacing the radio and display receiver assembly, always replace it with a new one. If a radio and display receiver assembly which was installed to another vehicle is used, the following may occur:

  • A communication malfunction DTC may be stored.
  • The radio and display receiver assembly may not operate normally.

HINT:

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

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 10/2019]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: PRECAUTION 2020 - 2022 MY RAV4 RAV4 HV [10/2019 - 10/2022]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: PRECAUTION

PROCEDURE

1.

INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY

(a) Remove the stereo component amplifier assembly with the connector(s) still connected.

Click here 2019 - 2022 MY RAV4 RAV4 HV [11/2018 - 10/2022]; AUDIO / VIDEO: STEREO COMPONENT AMPLIFIER: REMOVAL

*a

Component with harness connected

(Stereo Component Amplifier Assembly)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

M3-1 (MUTE) - Body ground

Ignition switch ACC, audio system playing

→ Changing modes

2.0 V or higher

→ Below 1 V
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: PROBLEM SYMPTOMS TABLE 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: PROBLEM SYMPTOMS TABLE 2020 - 2022 MY RAV4 RAV4 HV [10/2019 - 10/2022]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: PROBLEM SYMPTOMS TABLE

NG

2.

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

(a) Disconnect the G3 radio and display receiver assembly connector.

(b) Disconnect the M3 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

G3-25 (MUT1) - M3-1 (MUTE)

Always

Below 1 Ω

G3-25 (MUT1) or M3-1 (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) Disconnect the radio and display receiver assembly connector.

*a

Front view of wire harness connector

(to Radio and Display Receiver Assembly)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

G3-25 (MUT1) - Body ground

Ignition switch ACC, audio system is playing

2.0 V or higher
OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

NG

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY