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

DESCRIPTION

The radio receiver assembly sends a visual mute signal to the multi-display. 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 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

B001LHYE91
*1 VMTI
*2 VMTF
*3 Multi-display
*4 Radio Receiver Assembly

CAUTION / NOTICE / HINT

Note

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Navigation System Click here.

PROCEDURE


  1. INSPECT MULTI-DISPLAY


    1. B001KQ9E02
      Text in Illustration
      *a

      Component with harness connected

      (Multi-display)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H160-11 (VMTI) - Body ground

      Power switch on (ACC)

      Screen display changes

      3.5 V or higher

      → Below 1 V

      → 3.5 V or higher

    OK

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

    NG

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


    1. Disconnect the H147 radio receiver assembly connector.

    2. Disconnect the H160 multi-display connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H147-10 (VMTF) - H160 -11 (VMTI) Always Below 1 Ω
      H147-10 (VMTF) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE MULTI-DISPLAY


    1. Replace the multi-display with a new or known good one Click here.

    2. Check that the screen display is normal.

      OK
      Screen display is normal.

    OK

    END

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here