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:
Occupant Classification Sensor Power Supply
Circuit Malfunction
DTC B1793 Occupant Classification Sensor Power Supply
Circuit Malfunction
DESCRIPTION
The occupant classification sensor power supply circuit consists of the
occupant classification ECU and
the occupant classification sensors.
DTC B1793 is recorded when a malfunction is detected in the occu ...
Removal
1. REMOVE ENGINE ASSEMBLY WITH TRANSAXLE
HINT:
See page EM-26
2. REMOVE OIL LEVEL GAUGE GUIDE SUBASSEMBLY
(See page EM-39)
3. REMOVE NO. 1 OIL PIPE (See page EM-77)
4. REMOVE OIL PIPE (See page EM-77)
5. REMOVE CRANKSHAFT PULLEY (See page EM-79)
6. SEPARATE OIL COOLER PIPE
(a) Remove th ...
Deleting the contact data
For PBAP compatible Bluetooth® phones, this function is available when
“Automatic Transfer” is set to off.
Select “Delete Contacts”.
Select the desired contact and select “Delete”.
Select “Yes” when the confirmation screen appears.
Deleting the contact in a different w ...
