AUDIO AND VISUAL SYSTEM(w/o Multi-display) 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 normal, no sound, or only an extremely small sound, can be produced.

WIRING DIAGRAM

E130075E51

PROCEDURE

  1. CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY

    1. E199639C03

      *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

      H25-1 (MUTE) - Body ground

      Engine switch on (ACC), audio system is playing

      Higher than 3.5 V

      Audio system is changing modes

      Below 1 V

      Result

      Result

      OK

      NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

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

    1. Disconnect the H29 radio receiver assembly connector.

    2. Disconnect the H25 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

      H29-7 (MUTE) - H25-1 (MUTE)

      Always

      Below 1 Ω

      H29-7 (MUTE) - Body ground

      Always

      10 kΩ or higher

      Result

      Result

      OK

      NG
    OK

    REPLACE RADIO RECEIVER ASSEMBLY

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR