AUDIO AND VISUAL SYSTEM Mute Signal Circuit between Stereo Component Amplifier and Telematics Transceiver

DESCRIPTION

This 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).

If there is an open in the circuit, noise can be heard from the speakers when changing the sound source. If there is a short in the circuit, even though the stereo component amplifier assembly is functioning normally, no sound or only an extremely faint sound can be heard.

WIRING DIAGRAM

A01FDAVE02

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK DCM (TELEMATICS TRANSCEIVER)


    1. A01FFPSE02
      Text in Illustration
      *a

      Component with harness connected

      (DCM [Telematics Transceiver])

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      N168-17 (MUTE) - Body ground

      Engine switch on (ACC), audio system is playing

      → Emergency call mode

      Above 3.5 V

      → Below 1 V

    NG

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

    OK

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

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


    1. Disconnect the T40 stereo component amplifier assembly connector.

    2. Disconnect the N168 DCM (telematics transceiver) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T40-2 (TMUT) - N168-17 (MUTE) Always Below 1 Ω
      T40-2 (TMUT) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY


    1. A01FF0SE84
      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
      N168-17 (MUTE) - Body ground Engine switch on (ACC) Above 3.5 V

    NG

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Click here

    OK

    REPLACE DCM (TELEMATICS TRANSCEIVER) Click here