NAVIGATION SYSTEM Visual Mute Signal Circuit between Navigation ECU and Multi-display

DESCRIPTION

The multi-media module receiver assembly sends a visual mute signal to the multi-display assembly. As a result, a black screen is inserted 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

B001WMKE83
*1 VMTI
*2 VMTF
*3 Multi-display Assembly
*4 Multi-media Module Receiver Assembly

PROCEDURE


  1. CHECK MULTI-MEDIA MODULE RECEIVER ASSEMBLY


    1. A01X1GEE01
      Text in Illustration
      *a

      Component with harness connected

      (Multi-media Module Receiver Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F77-10 (VMTF) - Body ground Engine switch on (ACC), screen display changes. 3.5 V or higher → Below 1 V → 3.5 V or higher

    NG

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here

    OK

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


    1. Disconnect the F79 multi-display assembly connector.

    2. Disconnect the F77 multi-media module receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F79-11 (VMTI) - F77-10 (VMTF) Always Below 1 Ω
      F79-11 (VMTI) - Body ground Always 10 kΩ or higher

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR