AUDIO AND VISUAL SYSTEM Mute Signal Circuit between Radio Receiver and Stereo Component Amplifier

DESCRIPTION

This circuit sends a signal to the stereo component amplifier to mute noise. As a result, 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 is functioning, no sound, or only an extremely faint sound, can be heard.

WIRING DIAGRAM

A0160ARE04

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT STEREO COMPONENT AMPLIFIER


    1. A015YZKE04

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      P30-1 (MUTE) - Body ground Engine switch on (ACC), Audio system is playing → Changing Above 3.5 V → Below 1 V

    NG

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

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

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


    1. A0160NZE04

      Disconnect the radio receiver connector and stereo component amplifier connector.

    2. A0163BKE02

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J66-7 (MUTE) - P30-1 (MUTE) Always Below 1 Ω
      J66-7 (MUTE) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT STEREO COMPONENT AMPLIFIER


    1. A0160NZE04

      Reconnect the stereo component amplifier connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      J66-7 (MUTE) - Body ground Engine switch on (ACC), Audio system is playing Above 3.5 V

    NG

    REPLACE STEREO COMPONENT AMPLIFIER Click here

    OK

    REPLACE RADIO RECEIVER Click here