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

DESCRIPTION

The navigation receiver assembly controls the volume according to the mute signal from the television display assembly.

The mute signal is sent to reduce noise and popping sounds, such as those generated when switching modes.

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 navigation receiver assembly is functioning normally, no sound or only an extremely faint sound can be heard.

WIRING DIAGRAM

A002B5QE37
*1 MUTE
*2 Navigation Receiver Assembly
*3 Television Display Assembly

PROCEDURE


  1. INSPECT TELEVISION DISPLAY ASSEMBLY


    1. A018HO7C11
      *a

      Component with harness connected

      (Television Display Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      S8-6 (MUT1) - Body ground

      Engine switch on (ACC)

      RSE system playing

      → Changing source

      3.5 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 (NAVIGATION RECEIVER ASSEMBLY - TELEVISION DISPLAY ASSEMBLY)


    1. Disconnect the F118 navigation receiver assembly connector.

    2. Disconnect the S8 television display assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      S8-6 (MUT1) - F118-8 (MUTE) Always Below 1 Ω
      S8-6 (MUT1) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE TELEVISION DISPLAY ASSEMBLY


    1. Replace the television display assembly and check if it operates normally.

      Click here

      OK
      The rear seat entertainment system operates normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (TELEVISION DISPLAY ASSEMBLY WAS DEFECTIVE)

    NG

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