AUDIO AND VISUAL SYSTEM AVC-LAN Circuit

DESCRIPTION

Each unit of the audio and visual 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 audio and visual system will not function normally because communication is not possible.

WIRING DIAGRAM

A005DSFE20
*1 Parking Assist ECU
*2 Radio and Display Receiver Assembly
*3 AVC-LAN Communication Line

CAUTION / NOTICE / HINT

Tech Tips

The radio and display receiver assembly is the master unit.

PROCEDURE


  1. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY


    1. Disconnect the radio and display receiver assembly connector.

    2. A005DHYE04
      Text in Illustration
      *a

      Component without harness connected

      (Radio and Display Receiver Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L169-7 (TX3+) - L169-8 (TX3-) Always 60 to 80 Ω

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

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


    1. Disconnect the radio and display receiver assembly connector.

    2. Disconnect the parking assist ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L64-11 (TX+) - L169-7 (TX3+) Always Below 1 Ω
      L64-10 (TX-) - L169-8 (TX3-) Always Below 1 Ω
      L64-11 (TX+) - Body ground Always 10 kΩ or higher
      L64-10 (TX-) - Body ground Always 10 kΩ or higher

    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 AND DISPLAY RECEIVER ASSEMBLY Click here