AUDIO AND VISUAL SYSTEM AVC-LAN Circuit

DESCRIPTION

Each unit of the audio system connected to the AVC-LAN (communication bus) transfers the signal of each switch by communication.

When a short to +B or short to ground occurs in this AVC-LAN, the audio system will not function normally as the communication is discontinued.

WIRING DIAGRAM

A0118PHE01

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT RADIO RECEIVER ASSEMBLY (TX+, TX-)


    1. A011A4IE01
      Text in Illustration
      *1

      Component without harness connected

      (Radio Receiver Assembly)

      Disconnect the D63 radio receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D63-9 (TX+) - D63-10 (TX-) Always 60 to 80 Ω

    3. Reconnect the radio receiver assembly connector.


    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    OK

  2. INSPECT COMBINATION METER ASSEMBLY (TX+, TX-)


    1. A011A9DE01
      Text in Illustration
      *1

      Component without harness connected

      (Combination Meter Assembly)

      Disconnect the D1 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D1-19 (TX+) - D1-18 (TX-) Always 60 to 80 Ω

    3. Reconnect the combination meter assembly connectors.


    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - COMBINATION METER ASSEMBLY)


    1. A0118FNE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Radio Receiver Assembly)
      *2

      Front view of wire harness connector

      (to Combination Meter Assembly)

      Disconnect the D63 radio receiver assembly connector.

    2. Disconnect the D1 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D63-9 (TX+) - D1-19 (TX+) Always Below 1 Ω
      D63-10 (TX-) - D1-18 (TX-)
      D1-19 (TX+) - D1-2 (B) Always 10 kΩ or higher
      D1-18 (TX-) - D1-24 (ET)

    4. Reconnect the radio receiver assembly connector.

    5. Reconnect the combination meter assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here