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:
Brake control
Sst
Recommended tools
HINT:
Torx is a registered trademark of Textron Inc.
EQUIPMENT
LUBRICANT
BRAKE
SST
RECOMMENDED TOOLS
EQUIPMENT
LUBRICANT
PARKING BRAKE
EQUIPMENT
STEERING COLUMN
SST
EQUIPMENT
...
Power window regulator
motor
INSPECTION
1. INSPECT POWER WINDOW REGULATOR MOTOR
(FRONT RH)
Remove the power window regulator motor.
Apply battery voltage to the motor connector
according to the table below.
NOTICE:
Do not apply battery to any terminals except
terminals 1 and 2.
Standard
2. INS ...
Terminals of ECU
1. CHECK POWER BACK DOOR ECU
Disconnect the P13 and P14 ECU connectors, and
check the voltage or resistance of each terminal of
the wire harness side connectors
If the result is not as specified, there may be a
malfunction on the wire harness side.
Reconnect the ECU connector ...
