REAR SEAT ENTERTAINMENT SYSTEM Mute Signal Circuit between Radio Receiver and Television Display Assembly

DESCRIPTION

This circuit sends a signal to the television display assembly to mute noise. Because of that, the noise produced by changing the sound source ceases.

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 television display assembly is normal, no sound, or only an extremely small sound, can be produced.

WIRING DIAGRAM

A01DUESE42

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK MUTE SIGNAL CIRCUIT


    1. A01DOX3E12
      Text in Illustration
      *a

      Component with harness connected

      (Television Display Assembly)

      Remove the television display assembly connector still connected Click here.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      W14-6 (MUT1) - Body ground Television display playing Above 3.5 V
      Television display changing modes Below 1 V

    NG

    CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEVISION DISPLAY ASSEMBLY) Click here

    OK

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

  2. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEVISION DISPLAY ASSEMBLY)


    1. Disconnect the H52 radio and display receiver assembly connector.

    2. Disconnect the W14 television display assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H52-8 (MUTE) - W14-6 (MUT1) Always Below 1 Ω
      H52-8 (MUTE) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK TELEVISION DISPLAY ASSEMBLY


    1. Temporarily replace the television display assembly with a new or known good one Click here.

    2. Check that the mute signal circuit functioning normally.

      OK
      The mute signal circuit functioning normally.

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

    END (TELEVISION DISPLAY ASSEMBLY IS DEFECTIVE)