AVC-LAN Circuit

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

1. Disconnect the radio receiver connectors.

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

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   ATX+ (J66-5) - ATX- (J66-15)	Always	60 to 80 Ω
   TX+ (J63-9) - TX- (J63-10)	Always	60 to 80 Ω

NG	REPLACE RADIO RECEIVER

OK

2. CHECK HARNESS AND CONNECTOR

HINT:

For details of the connectors, refer to "TERMINALS OF ECU" (Click here).

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

   1. Disconnect all connectors in all AVC-LAN circuits.

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

      OK:

      There is no open or short circuit.
      

      
      

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE