NAVIGATION SYSTEM (for DVD) AVC-LAN Circuit

DESCRIPTION

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

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

INSPECTION PROCEDURE

Note

The display and navigation module display is the master unit.

PROCEDURE


  1. INSPECT DISPLAY AND NAVIGATION MODULE DISPLAY


    1. A0163IKE23

      Disconnect the J124 display and navigation module display connector.

    2. A016190E08

      Disconnect the J126 display and navigation module display connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J124-1 (TX1+) - J124-2 (TX1-)*1 Always 60 to 80 Ω
      J124-12 (TX2+) - J124-13 (TX2-) Always 60 to 80 Ω
      J126-9 (TXM+) - J126-10 (TXM-) Always 60 to 80 Ω

      • *1: w/ Parking Assist Monitor System

      Text in Illustration
      *A w/ Parking Assist Monitor System
      *1

      Component without harness connected

      (Display and Navigation Module Display)
      *2

      Component without harness connected

      (Display and Navigation Module Display)

    NG

    REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR

    Tech Tips

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


    1. Referring to the AVC-LAN wiring diagram below, 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.

        A015ZWXE15
        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