AUDIO AND VISUAL SYSTEM (w/ Multi-display) AVC-LAN Circuit

DESCRIPTION

Each unit of the audio and visual system connected to the AVC-LAN (communication bus) transfers switch signals using the AVC-LAN.

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

A01G7ZGE16

INSPECTION PROCEDURE

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 Click here.

Tech Tips

The multi-media module receiver assembly is the master unit.

PROCEDURE


  1. INSPECT MULTI-MEDIA MODULE RECEIVER ASSEMBLY


    1. A01G7WTE12
      Text in Illustration
      *a

      Component without harness connected

      (Multi-media Module Receiver Assembly)

      Remove the multi-media module receiver assembly Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      45 (TX3+) - 46 (TX3-) Always 60 to 80 Ω

    NG

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - MULTI-DISPLAY ASSEMBLY)


    1. Disconnect the H97 multi-media module receiver assembly connector.

    2. Disconnect the H93 multi-display assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H97-45 (TX3+) - H93-7 (TX+) Always Below 1 Ω
      H97-46 (TX3-) - H93-19 (TX-) Always Below 1 Ω
      H97-45 (TX3+) - Body ground Always 10 kΩ or higher
      H97-46 (TX3-) - Body ground Always 10 kΩ or higher

    4. Proceed to the next step based on the inspection result.

      Result
      Result Proceed to
      OK (w/ Cooler Control Switch Assembly) A
      OK (w/o Cooler Control Switch Assembly) B
      NG C

    B

    INSPECT MALFUNCTIONING PARTS Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  3. CHECK HARNESS AND CONNECTOR (COOLER CONTROL SWITCH ASSEMBLY - MULTI-DISPLAY ASSEMBLY)


    1. Disconnect the h2 cooler control switch assembly connector.

    2. Disconnect the H93 multi-display assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      h2-15 (TX+) - H93-6 (TX1+) Always Below 1 Ω
      h2-5 (TX-) - H93-18 (TX1-) Always Below 1 Ω
      h2-15 (TX+) - Body ground Always 10 kΩ or higher
      h2-5 (TX-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. 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.

    NG

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here

    OK

    REPLACE MALFUNCTIONING PARTS