AUDIO AND VISUAL SYSTEM(for 8 Speakers) Mute Signal Circuit between Radio Receiver and Telematics Transceiver

DESCRIPTION

This DCM (telematics transceiver) sends a mute signal to the radio receiver assembly.

The radio receiver assembly controls the volume according to the mute signal from the DCM (telematics transceiver).

WIRING DIAGRAM

A00008RE28
*1 MUTE
*2 Radio Receiver Assembly
*3 DCM (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 DCM (TELEMATICS TRANSCEIVER)


    1. A00013NC48
      *a

      Component with harness connected

      (DCM [Telematics Transceiver])

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      I40-17 (MUTE) - Body ground

      Power switch on (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 RECEIVER ASSEMBLY -DCM [TELEMATICS TRANSCEIVER])


    1. Disconnect the I120 radio receiver assembly connector.

    2. Disconnect the I40 DCM (telematics transceiver) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I120-8 (TMUT) - I40-17 (MUTE) Always Below 1 Ω
      I120-8 (TMUT) or I40-17 (MUTE) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK RADIO RECEIVER ASSEMBLY


    1. B002J9NC42
      *a

      Front view of wire harness connector

      (DCM [Telematics Transceiver])

      Reconnect the I120 radio receiver assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      I40-17 (MUTE) - Body ground Power switch on (ACC) 3.5 V or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE DCM (TELEMATICS TRANSCEIVER) Click here

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here