NAVIGATION SYSTEM Mute Signal Circuit between Stereo Component Amplifier and Telematics Transceiver

DESCRIPTION

The 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 telematics transceiver.

WIRING DIAGRAM

A0022W8E15
*a MUTE
*b Stereo Component Amplifier Assembly
*c Telematics Transceiver

CAUTION / NOTICE / HINT

Note

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 TELEMATICS TRANSCEIVER


    1. A0022LIC60
      *a

      Component with harness connected

      (Telematics Transceiver)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K158-17 (MUTE) - Body ground

      Power switch on (ACC), audio system is playing

      → Emergency call mode

      2.0 V or higher

      → 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 - TELEMATICS TRANSCEIVER)


    1. Disconnect the P23 stereo component amplifier assembly connector.

    2. Disconnect the K158 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P23-2 (TMUT) - K158-17 (MUTE) Always Below 1 Ω
      P23-2 (TMUT) or K158-17 (MUTE) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  3. INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY


    1. Reconnect the P23 stereo component amplifier assembly connector.

    2. A0022BGC51
      *a

      Front view of wire harness connector

      (to Telematics Transceiver)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K158-17 (MUTE) - Body ground Power switch on (ACC) 2.0 V or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TELEMATICS TRANSCEIVER Click here

    NG

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Click here