Toyota Sienna Service Manual: System description
1. DESCRIPTION OF OCCUPANT CLASSIFICATION SYSTEM
- GENERAL DESCRIPTION.
- In the occupant classification system, the
occupant classification ECU calculates the
weight of the occupant based on a signal from
the occupant classification sensors. This system
recognizes the occupant to be a child if it detects
a weight of less than 36 kg (79.37 lb), and
disables the front passenger airbag and front
passenger side - side airbag.
- This system is mainly comprised of 4 occupant
classification sensors that detect the load on the
front passenger seat. The occupant
classification ECU controls the system, and the
passenger airbag ON/OFF indicator indicates
the ON/OFF condition of the front passenger
airbag and front passenger side - side airbag.
- OCCUPANT CLASSIFICATION SENSOR.
- The occupant classification sensors are installed
on 4 brackets connecting the seat rail and seat
frame. Accordingly, when load is applied to the
front passenger seat by an occupant sitting in it,
the occupant classification sensors register a
distortion.
- DESCRIPTION FOR PASSENGER AIRBAG ON/OFF INDICATOR.
- The passenger airbag ON/OFF indicator is
installed on the air conditioning control
assembly. This indicator informs the driver
whether the occupant classification ECU puts
the front passenger airbag assembly and side
airbag (front passenger side) into an active state
or inactive state.
- If a malfunction occurs in the occupant
classification system, "OFF" indication of the
passenger airbag ON/OFF indicator and the
SRS warning light will come on.
1. INSPECTION PROCEDURE FOR VEHICLE INVOLVED
IN ACCIDENT
Perform the zero point calibration and sensitivity
check if any of the following conditions occur.
The occupant classi ...
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 ...
Other materials:
Removal
1. REMOVE REAR WINDOW SIDE GARNISH
ASSEMBLY
2. REMOVE REAR DOOR WINDOW FRAME SUBASSEMBLY
3. REMOVE SIDE TRIM BOARD COVER REAR
4. REMOVE REAR DOOR TRIM BOARD SUBASSEMBLY
5. REMOVE REAR DOOR GLASS RUN
6. REMOVE SLIDE DOOR WINDOW ASSEMBLY
7. REMOVE REAR DOOR GLASS WEATHERSTRIP
Put pro ...
No. 2 Ultrasonic sensor
COMPONENTS
REMOVAL
1. REMOVE REAR BUMPER COVER (2)
2. REMOVE NO. 1 ULTRASONIC SENSOR RETAINER
Remove the No. 1 ultrasonic sensor retainer as
shown in the illustration
3. REMOVE NO. 2 ULTRASONIC SENSOR
Disconnect the connector and remove the No. 2
ultrasonic ...
Open in Front Passenger Side Squib 2nd Step
Circuit
DTC B1186/58 Open in Front Passenger Side Squib 2nd Step
Circuit
DESCRIPTION
The front passenger side squib 2nd step circuit consists of the center airbag
sensor assembly and the
front passenger airbag assembly.
The circuit instructs the SRS to deploy when deployment conditions are met.
...