REAR SEAT ENTERTAINMENT SYSTEM AVC-LAN Circuit

DESCRIPTION

Each unit of the rear seat entertainment system connected to the AVC-LAN (communication bus) transmits switch signals through the AVC-LAN.

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

WIRING DIAGRAM

B006EG8E02

CAUTION / NOTICE / HINT

Tech Tips

The multi-display controller sub-assembly is the master unit.

PROCEDURE


  1. INSPECT MULTI-DISPLAY CONTROLLER SUB-ASSEMBLY


    1. Remove the multi-display controller sub-assembly.

      Click here

    2. B006GUJC04
      *a

      Component without harness connected

      (Multi-display Controller Sub-assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      10 (TX1+) - 11 (TX1-) Always 60 to 80 Ω
      12 (TX2+) - 13 (TX2-) Always 60 to 80 Ω
      14 (TX3+) - 15 (TX3-) Always 60 to 80 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE MULTI-DISPLAY CONTROLLER SUB-ASSEMBLY Click here

    OK

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


    1. Disconnect the L137 multi-display controller sub-assembly connector.

    2. Disconnect the L141 television display assembly LH connector.

    3. Disconnect the L142 television display assembly RH connector.

    4. Disconnect the L140 disc player assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L137-10 (TX1+) - L142-3 Always Below 1 Ω
      L137-11 (TX1-) - L142-4 Always Below 1 Ω
      L137-12 (TX2+) - L141-3 Always Below 1 Ω
      L137-13 (TX2-) - L141-4 Always Below 1 Ω
      L137-14 (TX3+) - L140-9 (TX+) Always Below 1 Ω
      L137-15 (TX3-) - L140-10 (TX-) Always Below 1 Ω
      L137-10 (TX1+) - Body ground Always 10 kΩ or higher
      L137-11 (TX1-) - Body ground Always 10 kΩ or higher
      L137-12 (TX2+) - Body ground Always 10 kΩ or higher
      L137-13 (TX2-) - Body ground Always 10 kΩ or higher
      L137-14 (TX3+) - Body ground Always 10 kΩ or higher
      L137-15 (TX3-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    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.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MALFUNCTIONING PARTS

    NG

    REPLACE MULTI-DISPLAY CONTROLLER SUB-ASSEMBLY Click here