Toyota Camry owners & service manuals

Toyota Camry: Mute Signal Circuit between Stereo Component Amplifier and Telematics Transceiver

Toyota Camry Repair Manual XV70 (2018-2024) / Audio, Visual, Telematics / Audio / Video / Audio And Visual System / 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 from the DCM (telematics transceiver).

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

  • 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.
  • Before replacing the DCM (telematics transceiver), refer to Registration.

    Click here

PROCEDURE

1.

INSPECT DCM (TELEMATICS TRANSCEIVER)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

K140-14 (MUTE) - Body ground

Ignition switch ACC

Audio system playing

→ Emergency call mode

2.0 V or higher

→ Below 1 V

*a

Component with harness connected

(DCM (Telematics Transceiver))

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 K10 stereo component amplifier assembly connector.

(b) Disconnect the K140 DCM (telematics transceiver) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

K10-24 (TMUT) - K140-14 (MUTE)

Always

Below 1 Ω

K10-24 (TMUT) or K140-14 (MUTE) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY

(a) Disconnect the K140 DCM (telematics transceiver) connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

K140-14 (MUTE) - Body ground

Ignition switch ACC

2.0 V or higher

*a

Front view of wire harness connector

(to DCM (Telematics Transceiver))

OK

REPLACE DCM (TELEMATICS TRANSCEIVER)

NG

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY

    READ NEXT:

     Mute Signal Circuit between Radio Receiver and Telematics Transceiver

    DESCRIPTION The DCM (telematics transceiver) sends a mute signal to the radio and display receiver assembly. The radio and display receiver assembly controls the volume according to the mute signal

     AVC-LAN Circuit

    DESCRIPTION Each unit of the audio and visual system connected to the AVC-LAN (communication bus) transmits signals via AVC-LAN communication. If a short to +B or short to ground occurs in an AVC-LA

     Vehicle Speed Signal Circuit between Stereo Component Amplifier and Combination Meter

    DESCRIPTION The stereo component amplifier assembly receives a vehicle speed signal from the combination meter assembly to control the ASL function. HINT: A voltage of 12 V or 5 V is output from

    SEE MORE:

     Components

    COMPONENTS ILLUSTRATION *1 FRONT DISC BRAKE ANTI-SQUEAL SHIM KIT *2 FRONT DISC BRAKE PAD *3 FRONT DISC BRAKE CYLINDER ASSEMBLY *4 FRONT DISC BRAKE PAD WEAR INDICATOR PLATE *5 FRONT NO. 1 DISC BRAKE ANTI-SQUEAL SHIM *6 FRONT NO. 2 DISC BRAKE ANT

     Green Indicator Remains Off

    DESCRIPTION After engine switch on (IG), the DCM (telematics transceiver) will enter into self check mode. The manual (SOS) switch red indicator will illuminate for 2 seconds and turn off followed by the manual (SOS) switch green indicator illuminating and remaining on under normal operation. If nei

    © 2023-2024 Copyright www.tocamry.com