NAVIGATION SYSTEM (for HDD) AVC-LAN Circuit

DESCRIPTION

Each unit of the navigation system connected to the AVC-LAN (communication bus) transfers switch signals by the audio visual communication local area network.

If a short to +B or short to ground occurs in the AVC-LAN, the navigation system does not function normally as communication is stopped.

WIRING DIAGRAM

A009BNGE01

INSPECTION PROCEDURE

Note

The display and navigation module display is the master unit.

PROCEDURE


  1. CHECK DISPLAY AND NAVIGATION MODULE DISPLAY


    1. A0094ORE01
      Text in Illustration
      *A w/ Parking Assist Monitor System and/or Side Monitor System
      *a

      Component without harness connected

      (Display and Navigation Module Display)

      Disconnect the H3 and H15 display and navigation module display connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H3-1 (TX1+) - H3-2 (TX1-)* Always 60 to 80 Ω
      H15-9 (TXM+) - H15-10 (TXM-) Always 60 to 80 Ω

      • *: w/ Parking Assist Monitor System and/or Side Monitor System


    NG

    REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - WHICH HAS STEREO THIS CODE)

    Tech Tips

    For details of the connectors, refer to Terminals of ECU Click here.


    1. Referring to the AVC-LAN wiring diagram above, check all AVC-LAN circuits.


      1. Disconnect all connectors in all AVC-LAN circuits.

      2. Check for an open or short in all AVC-LAN circuits.

        OK
        There is no open or short circuit.

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT MALFUNCTIONING PARTS


    1. Disconnect and reconnect each slave unit one by one until the master unit returns to normal operation.

      Tech Tips


      • Check all slave units.

      • If disconnecting a slave unit causes the master unit to return to normal operation, the slave unit is defective and should be replaced.

      OK
      Master unit returns to normal operation.

    NG

    REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Click here

    OK

    REPLACE MALFUNCTIONING PARTS