NAVIGATION 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

A01I22UE26

INSPECTION PROCEDURE

Note

If the DCM (telematics transceiver) has been replaced, perform the DCM Activation procedure using the Techstream Click here.

PROCEDURE


  1. INSPECT DCM (TELEMATICS TRANSCEIVER)


    1. A01I0BVE56
      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 Condition Specified Condition
      I135-17 (MUTE) - Body ground

      Ignition switch ACC

      Audio system playing

      → Emergency call mode

      2.0 V or higher

      → 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 I69 stereo component amplifier assembly connector.

    2. Disconnect the I135 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. Disconnect the I135 DCM (telematics transceiver) connector.

    2. A01I0IOE17
      Text in Illustration
      *a

      Front view of wire harness connector

      (to DCM (Telematics Transceiver))

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      I135-17 (MUTE) - Body ground Ignition switch ACC 2.0 V or higher

    NG

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Click here

    OK

    REPLACE DCM (TELEMATICS TRANSCEIVER) Click here