AVC-LAN Circuit (Multi-Display Controller ECU)

AVC-LAN CIRCUIT (MULTI-DISPLAY CONTROLLER ECU - RADIO RECEIVER ASSY)

CIRCUIT DESCRIPTION

Each unit of the LEXUS navigation system connected to AVC-LAN (communication bus) communicates by transferring the signals from each switch.

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

In AVC-LAN, Multi-display assy becomes the communication master, and the radio receiver assy has enough resistance necessary for transmitting the communication.

The multi-display assy is connected between the navigation ECU and radio receiver assy, and LEXUS navigation system has the structure that makes communication impossible without the navigation ECU, multi-display assy or radio receiver assy.

Wiring Diagram:

Step 1:

INSPECTION PROCEDURE