Toyota Sienna Service Manual: 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 AND NAVIGATION ASSEMBLY
- Disconnect the radio and navigation assembly connectors.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
2 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.
- Check for an open or short in all AVC-LAN circuits.
OK: There is no open or short circuit.
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
Mute Signal Circuit between Radio and Navigation Assembly and
Stereo Component Amplifier
DESCRIPTION
This circuit sends a signal to the stereo component amplifier to mute noise.
Because of that, the noise
produced by changing the sound source ceases.
If there is an open in the circ ...
Reverse Signal Circuit
DESCRIPTION
The radio and navigation assembly receives a reverse signal from the
park/neutral position switch and
information about the GPS antenna, and then adjusts vehicle position.
WIRING DIAG ...
Other materials:
Reassembly
1. INSTALL FRONT DOOR WIRE LH
Install the wire with the 2 bolts.
Torque: Reference
8.0 N*m (82 kgf*cm, 71 in.*lbf)
NOTICE:
In order to prevent water leakage, be sure that
the lip of the rubber grommet does not turn up
or is not deformed when installing the wire.
Connect the wir ...
On-vehicle inspection
1. INSPECT COOLER CONDENSER CORE
(a) If the fin of the cooler condenser core is dirty, clean
it with water and dry it with compressed air.
NOTICE:
Do not damage the fin of the cooler condenser
core.
(b) If the fin of the cooler condenser core is bent, make
it straight using a screwdriver or p ...
DTC check / clear
HINT:
Illustrations may differ from the actual vehicle depending
on the device settings and options. Therefore, some
detailed areas may not be shown exactly the same as on
the actual vehicle.
If the system cannot enter the diagnostic mode, inspect all AVC-LAN
communication ...
