NAVIGATION SYSTEM(for Radio and Display Type) AVC-LAN Circuit

DTC Code DTC Name
AVC-LAN Circuit

DESCRIPTION

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

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

WIRING DIAGRAM

E280962E07

CAUTION / NOTICE / HINT

Tip:

The radio and display receiver assembly is the master unit.

Note:

Check that the wire harness is properly installed and does not have any sharp bends, pinching or loose connections.

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PROCEDURE

  1. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY

    1. E280968N01

      Remove the radio and display receiver assembly with the connector(s) still connected.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      7 (TX1+) - 8 (TX1-)

      Always

      60 to 80 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

    Click here

    OK

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

    1. Disconnect the G143 radio and display receiver assembly connector.

    2. Disconnect the M32 stereo component amplifier assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      M32-8 (TX+) - G143-7 (TX1+)

      Always

      Below 1 Ω

      M32-7 (TX-) - G143-8 (TX1-)

      Always

      Below 1 Ω

      M32-8 (TX+) - Body ground

      Always

      10 kΩ or higher

      M32-7 (TX-) - Body ground

      Always

      10 kΩ or higher

    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 operation.

      Tip:

      • 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.

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE MALFUNCTIONING PARTS

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

    Click here