Toyota Sienna Service Manual: System description
1. MULTIPLEX COMMUNICATION SYSTEM (BEAN)
- The BEAN communication line is used to control the combination meter, the A/C amplifier, the airbag sensor assembly, the multiplex network body ECU, the power slide door ECU LH, the power slide door ECU RH, the power back door ECU, the seat position control ECU, the outer mirror control ECU LH, and the outer mirror ECU RH. If there is a shortcircuit (bus-down) in the line, the communication to the system that has a short-circuit (bus-down) will be disabled and the DTC concerning the system will be output from the multiplex network gateway ECU.
- If the DTC of ECU communication stop is output, connectors may be disconnected, or communication buses may be open at 2 points. It will not become abnormal with only 1 communication bus open.
- If 2 communication buses are open at the points shown in the illustration, the DTC of ECU communication stop between those 2 buses is output.
2. CHECK COMMUNICATION FUNCTION
- Check the battery voltage.
Standard voltage: 11 to 14 V
- Inspect the DTC output.
- Check a DTC concerning the multiplex network body ECU by connecting the intelligent tester to the DLC3 and turning the ignition switch to the ON position.
- When the display shows DTCs concerning the ECU unconnected and the communication bus defective, perform the inspection depending on the troubleshooting procedures.
HINT: When another DTC is output, refer to the DTC table and check the applicable section.
Multiplex communication system
PARTS LOCATION
...
How to proceed with
troubleshooting
HINT:
Troubleshoot in accordance with the procedures on the
following pages.
1 VEHICLE BROUGHT TO WORKSHOP
2 DTC CHECK
Check for DTCs and make a note of the code that is
output (See page MP- ...
Other materials:
Rear ceiling lights
Turns the lights on/off
When the personal/interior light
main switch is in the off position,
the rear ceiling lights will not turn
on even if the switch is on.
Adjusting the rear personal/interior lights angle (if equipped)
Push the edge of the light lens.
Illuminated entry system
...
Precaution
1. SRS AIRBAG SYSTEM HANDLING PRECAUTIONS
This vehicle is equipped with an SRS
(Supplemental Restraint System) such as the driver
airbag and front passenger airbag. Failure to carry
out service operations in the correct sequence could
cause unexpected SRS deployment during
servicing an ...
Reassembly
1. INSTALL INPUT SHAFT OIL SEAL RING
(a) Compress a new input shaft oil seal ring from both
sides to reduce dimension A.
Dimension A:
5 mm (0.197 in.)
(b) Coat the oil seal ring with ATF and install it to the
input shaft.
NOTICE:
Do not expand the end gap of the oil seal ring
too much. ...
