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 accessory meter 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 accessory meter 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

A000ZWLE92
*1 VMTI
*2 VMTF
*3 Accessory Meter Assembly
*4 Multi-media Module 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. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - ACCESSORY METER ASSEMBLY)


    1. Disconnect the L163 accessory meter assembly connector.

    2. Disconnect the L164 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
      L163-11 (VMTI) - L164-10 (VMTF) Always Below 1 Ω
      L163-11 (VMTI) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK MULTI-MEDIA MODULE RECEIVER ASSEMBLY


    1. A000ZB3E01
      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
      L164-10 (VMTF) - 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

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here