Toyota Sienna 2010-2024 Owners Manual: SRS airbags

The SRS airbags inflate when the vehicle is subjected to certain types of severe impacts that may cause significant injury to the occupants. They work together with the seat belts to help reduce the risk of death or serious injury.

• SRS front airbags

1. SRS driver airbag/front passenger airbag Can help protect the head and chest of the driver and front passenger from impact with interior components
2. SRS driver’s knee airbag Can help provide driver protection
3. SRS front passenger’s seat cushion airbag Can help restrain the front passenger

• SRS side and curtain shield airbags

4. SRS side airbags Can help protect the torsos of the front seat occupants
5. SRS curtain shield airbags

• Can help protect primarily the heads of occupants in the outer seats
• Can prevent the occupants from being thrown from the vehicle in the event of vehicle rollover

SRS airbag system components

1. Front passenger airbag
2. Curtain shield airbags
3. Side airbags
4. Seat belt pretensioners and force limiters
5. Front passenger occupant classification system (ECU and sensors)
6. Side impact sensors (rear)
7. Front passenger’s seat belt buckle switch
8. SRS warning light
9. Driver airbag
10. Side impact sensors (front door)
11. Driver’s seat belt buckle switch
12. Driver’s seat position sensor
13. Driver’s knee airbag
14. Front impact sensors
15. Airbag sensor assembly
16. “AIR BAG ON” and “AIR BAG OFF” indicator lights
17. Front passenger’s seat cushion airbag

Your vehicle is equipped with ADVANCED AIRBAGS designed based on the US motor vehicle safety standards (FMVSS208). The airbag sensor assembly (ECU) controls airbag deployment based on information obtained from the sensors etc. shown in the system components diagram above. This information includes crash severity and occupant information. As the airbags deploy, a chemical reaction in the inflators quickly fills the airbags with non-toxic gas to help restrain the motion of the occupants.

If the SRS airbags deploy (inflate)

• Slight abrasions, burns, bruising etc., may be sustained from SRS airbags, due to the extremely high speed deployment (inflation) by hot gases.
• Bruising and slight abrasions may result from contact with a deploying (inflating) SRS airbag.
• A loud noise and white powder will be emitted.
• Parts of the airbag module (steering wheel hub, airbag cover and inflator) as well as the front seats, parts of the front and rear pillars, and roof side rail, may be hot for several minutes. The airbag itself may also be hot.
• The windshield may crack.
• For Safety Connect subscribers, if the SRS airbags deploy or in the event of a severe rear-end collision, the system is designed to send an emergency call to the response center, notifying them of the vehicle’s location (without needing to push the “SOS” button) and an agent will attempt to speak with the occupants to ascertain the level of emergency and assistance required.

  If the occupants are unable to communicate, the agent automatically treats the call as an emergency and helps to dispatch the necessary emergency services.

SRS airbag deployment conditions (SRS front airbags)

• The SRS front airbags will deploy in the event of an impact that exceeds the set threshold level (the level of force corresponding to an approximately 12 - 18 mph [20 - 30 km/h] frontal collision with a fixed wall that does not move or deform).

However, this threshold velocity will be considerably higher in the following situations:

• If the vehicle strikes an object, such as a parked vehicle or sign pole, which can move or deform on impact
• If the vehicle is involved in an underride collision, such as a collision in which the front of the vehicle “underrides”, or goes under, the bed of a truck

• Depending on the type of collision, it is possible that only the seat belt pretensioners will activate.
• The SRS front airbags for the front passenger will not activate if there is no passenger sitting in the front passenger seat. However, the SRS front airbags for the front passenger may deploy if luggage is put in the seat, even if the seat is unoccupied.
• The SRS seat cushion airbag on the front passenger’s seat will not operate if the occupant is not wearing a seat belt.

SRS airbag deployment conditions (SRS side and curtain shield airbags)

• The SRS side and curtain shield airbags will deploy in the event of an impact that exceeds the set threshold level (the level of force corresponding to the impact force produced by an approximately 3300 lb. [1500 kg] vehicle colliding with the vehicle cabin from a direction perpendicular to the vehicle orientation at an approximate speed of 12 - 18 mph [20 - 30 km/h]).
• The SRS curtain shield airbags will deploy in the event of vehicle rollover.
• The SRS side and curtain shield airbags may also deploy in the event of a severe frontal collision.

Conditions under which the SRS airbags may deploy (inflate), other than a collision

The SRS front airbags and SRS side and curtain shield airbags may also deploy if a serious impact occurs to the underside of your vehicle. Some examples are shown in the illustration.

• Hitting a curb, edge of pavement or hard surface
• Falling into or jumping over a deep hole
• Landing hard or falling

The SRS curtain shield airbags may also deploy under the situations shown in the illustration.

• The angle of vehicle tip-up is marginal.
• The vehicle skids and hits a curb stone.

Types of collisions that may not deploy the SRS airbag (SRS front airbags)

The SRS front airbags do not generally inflate if the vehicle is involved in a side or rear collision, if it rolls over, or if it is involved in a low-speed frontal collision. But, whenever a collision of any type causes sufficient forward deceleration of the vehicle, deployment of the SRS front airbags may occur.

• Collision from the side
• Collision from the rear
• Vehicle rollover

Types of collisions that may not deploy the SRS airbags (SRS side and curtain shield airbags)

The SRS side and curtain shield airbags may not activate if the vehicle is subjected to a collision from the side at certain angles, or a collision to the side of the vehicle body other than the passenger compartment.

• Collision from the side to the vehicle body other than the passenger compartment
• Collision from the side at an angle

The SRS side airbags do not generally inflate if the vehicle is involved in a rear collision, if it rolls over, or if it is involved in a low-speed side collision or low-speed frontal collision.

• Collision from the rear
• Vehicle rollover

The SRS curtain shield airbags do not generally inflate if the vehicle is involved in a rear collision, if it pitches end over end, or if it is involved in a low-speed side or low-speed frontal collision.

• Collision from the rear
• Pitching end over end

When to contact your Toyota dealer

In the following cases, the vehicle will require inspection and/or repair. Contact your Toyota dealer as soon as possible.

• Any of the SRS airbags have been inflated.
• The front of the vehicle is damaged or deformed, or was involved in an accident that was not severe enough to cause the SRS front airbags to inflate.

• A portion of a door or its surrounding area is damaged or deformed, or the vehicle was involved in an accident that was not severe enough to cause the SRS side and curtain shield airbags to inflate.

• The pad section of the steering wheel, dashboard near the front passenger airbag or lower portion of the instrument panel is scratched, cracked, or otherwise damaged.

• The front passenger’s seat cushion surface is scratched, cracked, or otherwise damaged.

• The surface of the seats with the side airbag is scratched, cracked or otherwise damaged.

• The portion of the front pillars, rear pillars or roof side rail garnishes (padding) containing the curtain shield airbags inside is scratched, cracked or otherwise damaged.