AUDIO AND VISUAL SYSTEM(w/o Parking Assist Monitor System) Visual Mute Signal Circuit between Radio Receiver and Multi-display

DESCRIPTION

The radio receiver assembly sends a visual mute signal to the multi-display assembly. As a result, a black screen is displayed when the screen changes so that noise and distorted images are not displayed.

When an open exists in the circuit, noise and distorted images will be displayed instead of a black screen.

When a short exists in the circuit, even though the multi-display assembly is operating normally, noise and distorted images will be displayed (black screen will not be displayed) during screen changes or the black screen will always be displayed.

WIRING DIAGRAM

A00218AE15
*a VMTI
*b VMTF
*c Multi-display Assembly
*d Radio Receiver Assembly

PROCEDURE


  1. INSPECT MULTI-DISPLAY ASSEMBLY


    1. A0020H4C07
      *a

      Component with harness connected

      (Multi-display Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K61-11 (VMTI) - Body ground

      Power switch on (ACC)

      Screen display changes

      2 V or higher

      → Below 1 V

      → 2 V or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  2. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - MULTI-DISPLAY ASSEMBLY)


    1. Disconnect the K61 multi-display assembly connector.

    2. Disconnect the K74 radio receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K74-1 (VMTF) - K61-11 (VMTI) Always Below 1 Ω
      K74-1 (VMTF) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE MULTI-DISPLAY ASSEMBLY


    1. Replace the multi-display assembly.

      Click here

    2. Check that the screen display is normal.

      OK
      Screen display is normal.
      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here