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

A01WTSSE40
*a MUTE
*b DCM (Telematics Transceiver)
*c Stereo Component Amplifier Assembly

CAUTION / NOTICE / HINT

Note

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. CHECK DCM (TELEMATICS TRANSCEIVER)


    1. A01WT7GE02
      Text in Illustration
      *a

      Component with harness connected

      (DCM [Telematics Transceiver])

      Remove the DCM (telematics transceiver) with its connectors still connected Click here.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      P2-17 (MUTE) - Body ground

      Engine switch on (ACC), audio system is playing

      → Emergency call mode

      2.0 V or higher

      → Below 1 V

    OK

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

    NG

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


    1. Disconnect the F116 stereo component amplifier assembly connector.

    2. Disconnect the P2 DCM (telematics transceiver) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F116-2 (TMUT) - P2-17 (MUTE) Always Below 1 Ω
      F116-2 (TMUT) or P2-17 (MUTE) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY


    1. A01WVQUE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to DCM [Telematics Transceiver])

      Reconnect the F116 stereo component amplifier assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      P2-17 (MUTE) - Body ground Engine switch on (ACC) 3.5 V or higher

    OK

    REPLACE DCM (TELEMATICS TRANSCEIVER) Click here

    NG

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Click here