NAVIGATION SYSTEM 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

A01CCO8E40

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 Navigation System Click here.

Tech Tips

The navigation ECU sub-assembly is the master unit.

PROCEDURE


  1. INSPECT NAVIGATION ECU SUB-ASSEMBLY


    1. A01CC5CE11
      Text in Illustration
      *a

      Component without harness connected

      (Navigation ECU Sub-assembly)

      Disconnect the F35 navigation ECU sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F35-9 (TX1+) - F35-10 (TX1-) Always 60 to 80 Ω

    NG

    REPLACE NAVIGATION ECU SUB-ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU SUB-ASSEMBLY - TELEVISION DISPLAY ASSEMBLY)


    1. Disconnect the F35 navigation ECU sub-assembly connector.

    2. Disconnect the S6 television display assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F35-9 (TX1+) - S6-3 (TX+) Always Below 1 Ω
      F35-10 (TX1-) - S6-4 (TX-) Always Below 1 Ω
      F35-9 (TX1+) - Body ground Always 10 kΩ or higher
      F35-10 (TX1-) - Body ground Always 10 kΩ or higher

    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.

      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 NAVIGATION ECU SUB-ASSEMBLY Click here

    OK

    REPLACE MALFUNCTIONING PARTS