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

A000VDOE32
*a MUTE
*b Stereo Component Amplifier Assembly
*c DCM (Telematics Transceiver)

PROCEDURE


  1. CHECK DCM (TELEMATICS TRANSCEIVER)


    1. A000YBOE01
      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
      L191-17 (MUTE) - Body ground

      Power switch on (ACC), audio system is playing

      → Emergency call mode

      Above 3.5 V

      → 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 R95 stereo component amplifier assembly connector.

    2. Disconnect the L191 DCM (telematics transceiver) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R95-2 (TMUT) - L191-17 (MUTE) Always Below 1 Ω
      R95-2 (TMUT) or L191-17 (MUTE) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY


    1. A000UF1E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to DCM [Telematics Transceiver])

      Reconnect the 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
      L191-17 (MUTE) - Body ground Power switch on (ACC) Above 3.5 V

    OK

    REPLACE DCM (TELEMATICS TRANSCEIVER) Click here

    NG

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Click here