AVC-LAN Circuit

NAVIGATION: NAVIGATION SYSTEM (for CrewMax): AVC-LAN Circuit

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

PROCEDURE

1. CHECK NAVIGATION RECEIVER





(a) Disconnect the K18 and K8 receiver connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





HINT: *: w/ Rear Seat Entertainment System

Result





C -- REPLACE NAVIGATION RECEIVER
B -- REPLACE NAVIGATION RECEIVER
A -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR
HINT: For details of the connectors, refer to "TERMINALS OF ECU" Navigation System (for CrewMax).
(a) 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