NAVIGATION SYSTEM > AVC-LAN Circuit

for Preparation Click here


DESCRIPTION

Each unit of the navigation system connected to the AVC-LAN (communication bus) transfers the signal of each switch by communication.
When a short to +B or short to ground occurs in this AVC-LAN, the navigation system will not function normally as the communication is discontinued.

INSPECTION PROCEDURE

1.INSPECT RADIO RECEIVER
E110926E01

  1. Disconnect the radio receiver connectors.

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

    Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    ATX+ (R2-5) -
    ATX- (R2-15)
    		Always
    		60 to 80 Ω
    TX+ (R3-9) -
    TX- (R3-10)
    		Always
    		60 to 80 Ω



NG
REPLACE RADIO RECEIVER
OK


2.CHECK HARNESS AND CONNECTOR

HINT:
For details of the connectors, refer to the "Terminals of ECU" (Click here).



  1. Referring to the AVC-LAN wiring diagram below, check all AVC-LAN circuits.



    1. Check for open or short in all AVC-LAN circuits.

      OK:
      There is no open or short circuit.


      E111828E02



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL