Toyota Sienna Service Manual: Initialization
1. ZERO POINT CALIBRATION
NOTICE:
Make sure that the front passenger seat is not
occupied before performing the operation.
HINT:
Perform the zero point calibration and sensitivity check if
any of the following conditions occur.
- The occupant classification ECU is replaced.
- Accessories (seatback tray and seat cover, etc.) are
installed.
- The front passenger seat is removed from the vehicle.
- The passenger airbag ON/OFF indicator ("OFF")
comes on when the front passenger seat is not
occupied.
- The vehicle is brought to the workshop for repair due
to an accident or a collision.
- Zero point calibration and sensitivity check
procedures

HINT:
Make sure that zero point calibration has finished
normally, and then perform the sensitivity check.
- Adjust the seat position according to the table
below.

- Connect the intelligent tester to the DLC3.
- Turn the ignition switch to the ON position.
- Perform the zero point calibration by following
the prompts on the tester screen.

HINT:
Refer to the intelligent tester operator's manual
for further details.
OK:
"COMPLETE" is displayed.
- Perform the sensitivity check by following the
prompts on the tester screen.
- Confirm that the beginning sensor reading is
within the standard range.
Standard value:
-3.2 to 3.2 kg (-7 to 7 lb)
- Place a 30 kg (66.14 lb) weight (eg. a 30 kg
(66.14 lb) of lead mass) onto the front passenger
seat.
- Confirm that the sensitivity is within the standard
range.

Standard value:
27 to 33 kg (59.52 to 72.75 lb)
HINT:
- When performing the sensitivity check, use a
solid metal weight (the check result may not
appear properly if a liquid weight is used).
- If the sensitivity deviates from the standard
range, retighten the bolts of the front
passenger seat taking care not to deform the
seat rail. After performing this procedure, if
the sensitivity is not within the standard
range, replace the front seat assembly RH.
- If zero point calibration has not finished
normally, replace the front seat assembly RH.
The intelligent tester can be used in steps 4, 6, 8 and 9.
1 VEHICLE BROUGHT TO WORKSHOP
2 CUSTOMER PROBLEM ANALYSIS
3 PASSENGER AIRBAG ON/OFF INDICATOR CHECK
4 DTCs CHECK (Present and Past DTCs)
...
HINT:
Proceed to the troubleshooting for each circuit in the table
below.
Occupant Classification System
Symptom
Suspected area
The front passenger seat condition differ ...
Other materials:
Transfer
SST
RECOMMENDED TOOLS
EQUIPMENT
LUBRICANT
SSM
...
Removal
1. Remove rear wheel
2. Remove exhaust pipe assembly
Hint:
(see page ex-8)
3. Remove propeller with center bearing
shaft assembly
Hint:
(see page pr-3)
4. REMOVE REAR DIFFERENTIAL FILLER PLUG
(A) using a hexagon wrench (10 mm), remove the filler
plug and gasket.
5. Remove rear differentia ...
Reassembly
1. INSTALL LOWER RADIATOR GRILLE
Engage the 16 claws to install the lower radiator
grille to the front bumper cover.
2. INSTALL FRONT BUMPER HOLE COVER LH (w/o
Fog Light)
Engage the 2 pins to install the front bumper hole
cover LH to the front bumper cover.
3. INSTALL FRON ...