AVC-LAN Circuit: Description
WARNING: This page is about a different car, the 2006 Lexus IS 350 and 2006 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
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.
- INSPECT RADIO RECEIVER
- Disconnect the radio receiver connectors.
- 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
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE RADIO RECEIVER
OK: Go to next step.
- CHECK HARNESS AND CONNECTOR
HINT:
For details of the connectors, refer to "TERMINALS OF ECU " .
- Referring to the AVC-LAN wiring diagram below, check all AVC-LAN circuits.
- Disconnect all connectors in all AVC-LAN circuits.
- 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
- Referring to the AVC-LAN wiring diagram below, check all AVC-LAN circuits.