DESCRIPTION
Each unit of the navigation system connected to the AVC-LAN (communication bus) transfers switch signals by the audio visual communication local area network.
If a short to +B or short to ground occurs in the AVC-LAN, the navigation system will not function normally as communication is stopped.
INSPECTION PROCEDURE
Note
The display and navigation module display is the master unit.
When replacing the display and navigation module display, perform vehicle contract setting (w/ G-BOOK system) Click here.
PROCEDURE
INSPECT DISPLAY AND NAVIGATION MODULE DISPLAY
Disconnect the G4 display and navigation module display connector.
Disconnect the G5 display and navigation module display connector.
Disconnect the G24 display and navigation module display connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
*1 | Component without harness connected (Display and Navigation Module Display) |
*2 | w/ Side Monitor System |
*3 | w/ Headup Display |
NG |
REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Click here |
OK |
CHECK HARNESS AND CONNECTOR (AVC-LAN CIRCUIT)
Tech Tips
For details of the connectors, refer to Terminals of ECU Click here.
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 |
INSPECT MALFUNCTIONING PARTS
Disconnect and reconnect each slave unit one by one until the master unit returns to normal operation.
Tech Tips
Check all slave units.
If disconnecting a slave unit causes the master unit to return to normal operation, the slave unit is defective and should be replaced.
OK |
---|
Master unit returns to normal operation. |
NG |
REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Click here |
OK |
REPLACE MALFUNCTIONING PARTS