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.
Problem symptoms table
HINT: Proceed to the troubleshooting for each circuit in the table below.
Occupant Classification System
|
Symptom |
Suspected area |
| The front passenger seat condition differs from the indication by the passenger airbag ON/OFF indicator (DTC is not output). | Trouble in Passenger Airbag ON/OFF Indicator |
How to proceed with
troubleshooting
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 ...
Terminals of ECU
1. OCCUPANT CLASSIFICATION ECU
...
Other materials:
On-vehicle inspection
1. INSPECT SEAT POSITION SENSOR (VEHICLE NOT
INVOLVED IN COLLISION)
Perform a diagnostic system check.
2. INSPECT SEAT POSITION SENSOR (VEHICLE
INVOLVED IN COLLISION)
Perform a diagnostic system check.
Even if the airbag was not deployed, check if there
is any dama ...
Adjustment
HINT:
On the RH side, use the same procedures as on the LH side.
1. INSPECT SLIDE DOOR PANEL SUB-ASSEMBLY LH
Check that the clearance is within the standard
range.
Standard
2. ADJUST SLIDE DOOR PANEL SUB-ASSEMBLY LH
Using the SST, horizontally and vertically adjust the
...
Installation
HINT:
Install the RH side by the same procedure as the LH side.
1. INSTALL FRONT DISC BRAKE CYLINDER SLIDE BUSH
(a) Apply the lithium soap base glycol grease to a new
front disc brake cylinder slide bush.
(b) Install the cylinder slide bush to the bottom side of
the front disc brake cyli ...