AUDIO AND VISUAL SYSTEM(except Sedan Radio and Display Type) Mute Signal Circuit between Radio Receiver and Stereo Component Amplifier

DTC Code DTC Name
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 functioning normally, no sound or only an extremely faint sound can be heard.

WIRING DIAGRAM

E226158E98

PROCEDURE

  1. INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY

    1. E225824C04

      *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

      E92-1 (MUTE) - Body ground

      Ignition switch ACC, audio system playing

      → Changing modes

      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 hereClick here

    NG

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

    1. Disconnect the E60 radio and display receiver assembly connector.

    2. Disconnect the E92 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

      E60-20 (MUT1) - E92-1 (MUTE)

      Always

      Below 1 Ω

      E60-20 (MUT1) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY (OUTPUT SIGNAL)

    1. Reconnect the E92 stereo component amplifier assembly connector.

    2. E265411C01

      *a

      Front view of wire harness connector

      (to Radio and Display Receiver Assembly)

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      E60-20 (MUT1) - Body ground

      Ignition switch ACC, audio system is playing

      3.5 V or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

    Click here

    NG

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY

    Click here