AUDIO AND VISUAL SYSTEM(for Radio and Display Type) Mute Signal Circuit between Radio Receiver and Telematics Transceiver

DESCRIPTION

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 from the telematics transceiver.

WIRING DIAGRAM

A01V78OE26
*1 MUTE
*2 Radio and Display Receiver Assembly
*3 Telematics Transceiver

CAUTION / NOTICE / HINT

Note


  • Check that the wire harness is properly installed and does not have any sharp bends, pinching or loose connections.

    Click here


  • 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 TELEMATICS TRANSCEIVER


    1. A01V7B9C43
      *a

      Component with harness connected

      (Telematics Transceiver)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      M38-17 (MUTE) - Body ground

      Ignition switch ACC

      Audio system playing

      → Emergency call mode

      3.5 V or higher

      → Below 1 V
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEMATICS TRANSCEIVER)


    1. Disconnect the G141 radio and display receiver assembly connector.

    2. Disconnect the M38 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G141-8 (TMUT) - M38-17 (MUTE) Always Below 1 Ω
      G141-8 (TMUT) or M38-17 (MUTE) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY


    1. Reconnect the G141 radio and display receiver assembly connector.

    2. A01V7OHC35
      *a

      Front view of wire harness connector

      (to Telematics Transceiver)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      M38-17 (MUTE) - Body ground Ignition switch ACC 3.5 V or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TELEMATICS TRANSCEIVER Click here

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here