NAVIGATION 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. 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 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

B004WUWE09
*a VMTI
*b VMTF
*c Multi-display
*d Radio Receiver Assembly

CAUTION / NOTICE / HINT

Note


  • Check that the wire harness is properly installed and does not have any sharp bends, pinching or loose connections.

  • When replacing the radio receiver assembly, always replace it with a new one.

    If a radio receiver assembly which was installed to another vehicle is used, the following may occur:


    • A communication malfunction DTC may be stored.

    • The radio receiver assembly may not operate normally.

Tech Tips

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 (RADIO RECEIVER ASSEMBLY - MULTI-DISPLAY)


    1. Disconnect the G51 multi-display connector.

    2. Disconnect the G54 radio receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G51-11 (VMTI) - G54-1 (VMTF) Always Below 1 Ω
      G51-11 (VMTI) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK RADIO RECEIVER ASSEMBLY


    1. B004TNBC18
      *a

      Component with harness connected

      (Radio Receiver Assembly)

      Remove the radio receiver assembly with the connector(s) still connected.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G54-1 (VMTF) - Body ground Power switch on (ACC), screen display changes

      3.5 V or higher

      → Below 1 V

      → 3.5 V or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here