AUDIO AND VISUAL SYSTEM (w/o Navigation System) Mute Signal Circuit between Radio Receiver and Stereo Component Amplifier

DESCRIPTION

This circuit sends a signal to the stereo component amplifier 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 stereo component amplifier assembly is normal, no sound, or only an extremely small sound, can be produced.

WIRING DIAGRAM

A0096MTE44

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY


    1. A0097C0E01
      Text in Illustration
      *a

      Component with harness connected

      (Stereo Component Amplifier Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H31-1 (MUTE) - Body ground Ignition switch ACC, audio system is playing Above 3.5 V
      Audio system is changing modes Below 1 V

    NG

    CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER) Click here

    OK

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

  2. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER)


    1. Disconnect the H38 radio receiver assembly connector.

    2. Disconnect the H31 stereo component amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H38-7 (MUTE) - H31-1 (MUTE) Always Below 1 Ω
      H38-7 (MUTE) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (w/o Accessory Meter) A
      OK (w/ Accessory Meter) B
      NG C

    B

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE RADIO RECEIVER ASSEMBLY Click here