Component Tests and General Diagnostics

AVC-LAN (Communication Bus) Circuit

CIRCUIT DESCRIPTION





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

When +B short and GND short occur in this AVC-LAN, navigation system will not function normally as the communication is discontinued.

In this AVC-LAN, multi display becomes the master of the communication, and the radio receiver assembly has a terminator necessary for transmitting the communication.

Multi display is connected between navigation ECU and radio receiver assembly, navigation system has the structure that makes communication impossible without navigation ECU, multi display or radio receiver assembly.

Wiring Diagram:

Steps 1 - 3:

INSPECTION PROCEDURE