NAVIGATION SYSTEM AVC-LAN Circuit

DESCRIPTION

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

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

WIRING DIAGRAM

A0007CSE16

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.

Tech Tips

The radio receiver assembly is the master unit.

PROCEDURE


  1. INSPECT RADIO RECEIVER ASSEMBLY


    1. Remove the radio receiver assembly Click here.

    2. A0004IIE13
      Text in Illustration
      *a

      Component without harness connected

      (Radio Receiver Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      45 (TX3+) - 46 (TX3-) Always 60 to 80 Ω

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (AVC-LAN CIRCUIT)


    1. Disconnect the H97 radio receiver assembly connector.

    2. Disconnect the H93 multi-display assembly connector.

    3. Disconnect the j2 rear control switch connector.*

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H97-45 (TX3+) - H93-7 (TX+) Always Below 1 Ω
      H97-46 (TX3-) - H93-19 (TX-) Always Below 1 Ω
      j2-15 (TX+) - H93-6 (TX1+)* Always Below 1 Ω
      j2-5 (TX-) - H93-18 (TX1-)* Always Below 1 Ω
      H93-7 (TX+) - Body ground Always 10 kΩ or higher
      H93-19 (TX-) - Body ground Always 10 kΩ or higher
      H93-6 (TX1+) - Body ground* Always 10 kΩ or higher
      H93-18 (TX1-) - Body ground* Always 10 kΩ or higher

      • *: w/ Rear Control Switch


    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.

      Tech Tips


      • Check all slave units.

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

      OK
      Master unit returns to normal.

    OK

    REPLACE MALFUNCTIONING PARTS

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here