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AUDIO AND VISUAL SYSTEM(for 7 Inch Display) AVC-LAN Circuit

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DTC Code DTC Name
  AVC-LAN Circuit
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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.

Table 1. *a Stereo Component Amplifier Assembly *b Multi-display Assembly *c Radio Receiver Assembly *d AVC-LAN Communication Line
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WIRING DIAGRAM

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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 Audio and Visual System.

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  • When replacing the radio receiver assembly, always replace it with a new one. If a radio receiver assembly which was installed to another vehicle is used, the following may occur:


    • A communication malfunction DTC may be stored.

    • The radio receiver assembly may not operate normally.

Tip:

The radio receiver assembly is the master unit.

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PROCEDURE


  1. Click here

    INSPECT RADIO RECEIVER ASSEMBLY


    1. Remove the radio receiver assembly.

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    2. B006803C12
      *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
      17 (TX2+) - 18 (TX2-) Always 60 to 80 Ω
      5 (TX1+) - 6 (TX1-) Always 60 to 80 Ω
      Result
      Proceed to
      OK
      NG

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    CHECK HARNESS AND CONNECTOR (AVC-LAN CIRCUIT)


    1. Disconnect the O146 radio receiver assembly connector.

    2. Disconnect the T51 stereo component amplifier assembly connector.

    3. Disconnect the O60 multi-display assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O146-17 (TX2+) - T51-8 (TX+) Always Below 1 Ω
      O146-18 (TX2-) - T51-7 (TX-) Always Below 1 Ω
      O146-5 (TX1+) - O60-7 (TX+) Always Below 1 Ω
      O146-6 (TX1-) - O60-19 (TX-) Always Below 1 Ω
      O146-17 (TX2+) or T51-8 (TX+) - Body ground Always 10 kΩ or higher
      O146-18 (TX2-) or T51-7 (TX-) - Body ground Always 10 kΩ or higher
      O146-5 (TX1+) or O60-7 (TX+) - Body ground Always 10 kΩ or higher
      O146-6 (TX1-) or O60-19(TX-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

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    INSPECT MALFUNCTIONING PARTS


    1. Disconnect and reconnect each slave unit one by one until the master unit returns to normal.

      Tip:

      • 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 ASSEMBLYClick here