NAVIGATION SYSTEM (for Radio and Display Type) 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

A011R2NE03

INSPECTION PROCEDURE

PROCEDURE

  1. INSPECT DCM (TELEMATICS TRANSCEIVER)

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

      A011RTZE64
      Standard Voltage
      Tester Connection Condition Specified Condition
      I135-17 (MUTE) - Body ground

      Ignition switch ACC, audio system is playing

      → Emergency call mode

      Above 3.5 V

      → Below 1 V
      Text in Illustration
      *a

      Component with harness connected

      (DCM (Telematics Transceiver))
    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 stereo component amplifier assembly connector.

    2. Disconnect the DCM (telematics transceiver) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I69-24 (TMUT) - I135-17 (MUTE) Always Below 1 Ω
      I69-24 (TMUT) - Body ground Always 10 kΩ or higher
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY

    1. Reconnect the stereo component amplifier assembly connector.

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

      A011R4OE19
      Standard Voltage
      Tester Connection Condition Specified Condition
      I135-17 (MUTE) - Body ground Ignition switch ACC Above 3.5 V
      Text in Illustration
      *a

      Front view of wire harness connector

      (to DCM (Telematics Transceiver))
    NG

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Click here

    OK

    REPLACE DCM (TELEMATICS TRANSCEIVER) Click here