Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001KGAF
Model Year Start: 2020 Model: RAV4 Prod Date Range: [10/2019 - 10/2022]
Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Mute Signal Circuit between Stereo Component Amplifier and Telematics Transceiver; 2020 - 2022 MY RAV4 RAV4 HV [10/2019 - 10/2022]

Mute Signal Circuit between Stereo Component Amplifier and Telematics Transceiver

DESCRIPTION

This 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 from the DCM (telematics transceiver).

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 DCM (telematics transceiver), make sure to replace it with a new one.
  • Before replacing the DCM (telematics transceiver), refer to Registration.

    for HV Model: Click here 2020 - 2021 MY RAV4 HV [10/2019 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION 2022 - 2024 MY RAV4 HV [12/2021 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION

    for Gasoline Model: Click here 2020 MY RAV4 [10/2019 - 08/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION 2021 MY RAV4 [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION 2022 - 2024 MY RAV4 [12/2021 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

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 Audio and Visual System.

Click here 2020 - 2022 MY RAV4 RAV4 HV [10/2019 - 10/2022]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: PRECAUTION

PROCEDURE

1.

CHECK DCM (TELEMATICS TRANSCEIVER)

(a) Remove the DCM (telematics transceiver) with the connector(s) still connected.

Click here 2020 - 2022 MY RAV4 RAV4 HV [10/2019 - 10/2022]; CELLULAR COMMUNICATION: DCM(TELEMATICS TRANSCEIVER): REMOVAL

*a

Component with harness connected

(DCM [Telematics Transceiver])

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

G131-14 (MUTE) - Body ground

Ignition switch ON, audio system playing

→ Emergency call mode

2.0 V or higher

→ Below 1 V

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - DCM [TELEMATICS TRANSCEIVER])

(a) Disconnect the M3 stereo component amplifier assembly connector.

(b) Disconnect the G131 DCM (telematics transceiver) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

M3-24 (TMUT) - G131-14 (MUTE)

Always

Below 1 Ω

M3-24 (TMUT) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY

(a) Disconnect the DCM (telematics transceiver) connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

G131-14 (MUTE) - Body ground

Ignition switch ON

3.0 to 5.0 V

*a

Front view of wire harness connector

(To DCM [Telematics Transceiver])

OK

REPLACE DCM (TELEMATICS TRANSCEIVER)

NG

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY