NAVIGATION 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

B005B1TE01
*a MUTE
*b Stereo Component Amplifier Assembly
*c DCM (Telematics Transceiver)

CAUTION / NOTICE / HINT

Note

When replacing the DCM (telematics transceiver), make sure to replace it with a new one.

Tech Tips

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Navigation System.

Click here

PROCEDURE


  1. INSPECT DCM (TELEMATICS TRANSCEIVER)


    1. B005BFKC12
      *a

      Component with harness connected

      (DCM [Telematics Transceiver])

      Remove the DCM (telematics transceiver) with the connector(s) still connected.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      I40-17 (MUTE) - Body ground

      Engine switch on (ACC), audio system playing

      → Emergency call mode

      		 3.0 to 5.0 V → Below 1 V
      Result
      Proceed to
      OK
      NG

    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 P22 stereo component amplifier assembly connector.

    2. Disconnect the I40 DCM (telematics transceiver) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P22-2 (TMUT) - I40-17 (MUTE) Always Below 1 Ω
      P22-2 (TMUT) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY


    1. Disconnect the DCM (telematics transceiver) connector.

    2. B0059S0C62
      *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 Switch Condition Specified Condition
      I40-17 (MUTE) - Body ground Engine switch on (ACC) 3.0 to 5.0 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE DCM (TELEMATICS TRANSCEIVER) Click here

    NG

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Click here