AUDIO AND VISUAL SYSTEM(for 8 Inch Display) AVC-LAN Circuit

DESCRIPTION

Each unit of the audio and visual system connected to the AVC-LAN (communication bus) transmits signals via AVC-LAN communication.

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

WIRING DIAGRAM

A01VVZ9E02

CAUTION / NOTICE / HINT

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. A01VVNEC10
      *A w/ Panoramic View Monitor System
      *a

      Component without harness connected

      (Radio Receiver Assembly)
      A01VU5CC32
      *a

      Component without harness connected

      (Radio Receiver Assembly)
      A01VWKUC09
      *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
      J55-18 (TX2+) - J55-19 (TX2-) Always 60 to 80 Ω
      J55-7 (TX3+) - J55-8 (TX3-)* Always 60 to 80 Ω
      J53-7 (TX1+) - J53-8 (TX1-) Always 60 to 80 Ω
      J49-11 (TX4+) - J49-12 (TX4-) Always 60 to 80 Ω

      • *: w/ Panoramic View Monitor System

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    OK

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


    1. Disconnect the J53, J55 and J49 radio receiver assembly connectors.

    2. Disconnect the J67 stereo component amplifier assembly connector.

    3. Disconnect the J56 multi-display assembly connector.

    4. Disconnect the J59 remote operation board connector.

    5. Disconnect the J73 parking assist ECU connector (w/ Panoramic View Monitor System).

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J53-7 (TX1+) - J67-8 (TX+) Always Below 1 Ω
      J53-8 (TX1-) - J67-7 (TX-) Always Below 1 Ω
      J49-11 (TX4+) - J56-7 (TX+) Always Below 1 Ω
      J49-12 (TX4-) - J56-19 (TX-) Always Below 1 Ω
      J55-18 (TX2+) - J59-10 (TX+) Always Below 1 Ω
      J55-19 (TX2-) - J59-11 (TX-) Always Below 1 Ω
      J55-7 (TX3+) - J73-10 (TX+)* Always Below 1 Ω
      J55-8 (TX3-) - J73-9 (TX-)* Always Below 1 Ω
      J53-7 (TX1+) or J67-8 (TX+) - Body ground Always 10 kΩ or higher
      J53-8 (TX1-) or J67-7 (TX-) - Body ground Always 10 kΩ or higher
      J49-11 (TX4+) or J56-7(TX+) - Body ground Always 10 kΩ or higher
      J49-12 (TX4-) or J56-19(TX-) - Body ground Always 10 kΩ or higher
      J55-18 (TX2+) or J59-10 (TX+) - Body ground Always 10 kΩ or higher
      J55-19 (TX2-) or J59-11(TX-) - Body ground Always 10 kΩ or higher
      J55-7 (TX3+) or J73-10 (TX+) - Body ground* Always 10 kΩ or higher
      J55-8 (TX3-) or J73-9 (TX-) - Body ground* Always 10 kΩ or higher

      • *: w/ Panoramic View Monitor System

      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.

      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.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MALFUNCTIONING PARTS

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here