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

A003VC7E02

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 multi-media module receiver assembly is the master unit.

PROCEDURE


  1. INSPECT MULTI-MEDIA MODULE RECEIVER ASSEMBLY


    1. Remove the multi-media module receiver assembly.

    2. A003XR5E10
      Text in Illustration
      *a

      Component without harness connected

      (Multi-media Module Receiver Assembly)

      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
      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 - CENTER CLUSTER MODULE CIRCUIT)


    1. Disconnect the H147 multi-media module receiver assembly connector.

    2. Disconnect the H80 center cluster module circuit connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H147-45 (TX3+) - H80-15 (TX1+) Always Below 1 Ω
      H147-46 (TX3-) - H80-13 (TX1-) Always Below 1 Ω
      H147-45 (TX3+) - Body ground Always 10 kΩ or higher
      H147-46 (TX3-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the H147 multi-media module receiver assembly connector.

    2. Disconnect the H21 display module board connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H147-7 (TX1+) - H21-9 (MTX+) Always Below 1 Ω
      H147-8 (TX1-) - H21-10 (MTX-) Always Below 1 Ω
      H147-7 (TX1+) - Body ground Always 10 kΩ or higher
      H147-8 (TX1-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (DISPLAY MODULE BOARD - MULTI-MEDIA MODULE WIRE)


    1. Disconnect the H21 display module board connector.

    2. Disconnect the H20 multi-media module wire connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H21-11 (TX5+) - H20-3 (TX+) Always Below 1 Ω
      H21-12 (TX5-) - H20-8 (TX-) Always Below 1 Ω
      H21-11 (TX5+) - Body ground Always 10 kΩ or higher
      H21-12 (TX5-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT MULTI-MEDIA MODULE WIRE


    1. Remove the multi-media module wire.

    2. A003WQCE03
      Text in Illustration
      *a

      Component without harness connected

      (Multi-media Module Wire)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H20-3 (TX+) - DC1-7 (MTX+) Always Below 1 Ω
      H20-8 (TX-) - DC1-19 (MTX-) Always Below 1 Ω
      H20-3 (TX+) - Body ground Always 10 kΩ or higher
      H20-8 (TX-) - Body ground Always 10 kΩ or higher

    NG

    REPLACE MULTI-MEDIA MODULE WIRE Click here

    OK

  6. 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