avc-lan circuit (multi-display - gateway ecu) - Highlander Club

05-1862DIAGNOSTICS - NAVIGATION SYSTEMAVC-LAN CIRCUIT (MULTI-DISPLA Y - GATEWAY ECU)05IT8-02CIRCUIT DESCRIPTIONEach unit of the navigation system connected to AVC-LAN (communication bus) communicates by transferringthe signals from each switch.When +B short and GND short occur in this AVC-LAN, navigation system will not function normally as communicationis discontinued.In AVC-LAN, multi-display becomes the communication master, and the radio receiver assy has enoughresistance necessary for transmitting the communication.WIRING DIAGRAMMulti-DisplayGateway ECUTX3+11M4BR5G5GTX+TX3-12M4L12G5GTX-I349662005 HIGHLANDER REPAIR MANUAL (RM1144U)Author:Date:2052

DIAGNOSTICS - NAVIGATION SYSTEMINSPECTION PROCEDURE1 CHECK HARNESS AND CONNECTOR(MULTI-DISPLA Y - GATEWAY ECU)05-1863Multi-Display:M4(a)(b)Disconnect the connector from the multi-display M4 andgateway ECU G5.Measure the resistance according to the value(s) in thetable below.Standard:TX3+Tester connection Condition Specified conditionTX3+ - GTX+ Always Below 1 ΩTX3-I38998TX3- - GTX- Always Below 1 ΩTX3+ - Body ground Always 10 kΩ or higherTX3- - Body ground Always 10 kΩ or higherGateway ECU:G5GTX+GTX-I40180NG REPAIR OR REPLACE HARNESS ORCONNECTOROKPROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN DIAGNOSTIC TROUBLE CODE CHART(SEE PAGE 05-1791 )2005 HIGHLANDER REPAIR MANUAL (RM1144U)Author:Date:2053