2018 VOLVO XC90 sensor

SAFETY
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WARNING
If your vehicle has become water-damaged in any way (e.g., soaked floor mats/standingwater on the floor of the vehicle), do notattempt to start the engine. This may causeairbag deployment, which could result in seri-ous injury. Volvo recommends towing thevehicle directly to an authorized Volvo work-shop. Before attempting to tow the vehicle:
1. Switch off the ignition for at least 10minutes and disconnect the battery.
2. Follow the instructions for manually over- riding the shiftlock system.
Deployed airbags
WARNING
If any of the airbags have deployed:
• Do not attempt to drive the vehicle. Have it towed to an authorized workshop.
• If necessary, seek medical attention.
Related information
•
Safety (p. 42)
• Driver/passenger-side airbags (p. 53)
• Side airbags (p. 60)
• Inflatable curtain (p. 60)
Driver/passenger-side airbags
As a supplement to the seat belts, the vehicle is equipped with driver and passenger side frontairbags.
Driver/passenger side front airbags.
In a frontal collision, the airbags help protect the driver's and passenger's head, face and chestand the driver's knees and legs. A collision of a sufficiently violent force will trig- ger the sensors and one or more airbags willinflate. The airbag helps cushion the initial impactof the collision for the passenger. The airbagdeflates when compressed by the collision. Asmall amount of powder will also be releasedfrom the airbag. This may appear to be smokeand is normal. The entire process, from inflationto deflation of the airbag, occurs within tenths ofa second.
NOTE
The sensors react differently depending on the circumstances of the accident andwhether or not the seat belt is used. Does notapply to all belt positions. In some accident situations, only one (or none) of the airbags will be deployed. Thesensors monitor the impact of the collisionand react accordingly to deploy one, severalor no airbags.
WARNING
The seat belt and the airbag work together. If the seat belt is not used or is used incorrectly,the airbag may not provide the intended pro-tection in a collision. To help prevent injury in the event the airbag is deployed, passengers should sit as uprightas possible, with their feet on the floor andtheir backs against the seat backrest.
WARNING
Volvo recommends contacting an authorized Volvo workshop for repairs. Incorrectly per-formed repairs to the airbag system couldimpair function and lead to serious injury.
The front airbag systemThe front airbag system includes gas generators surrounded by the airbags, and deceleration sen-

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SAFETY
54sors that activate the gas generators, causing the airbags to be inflated with nitrogen gas. As the movement of the seats' occupants com- presses the airbags, some of the gas is expelledat a controlled rate to provide better cushioning.Both seat belt tensioners also deploy, minimizingseat belt slack. The entire process, from inflationto deflation of the airbag, occurs within tenths ofa second. The location of the front airbags is indicated by SRS AIRBAG
embossed on the steering wheel
pad and above the glove compartment, and by decals on both sun visors and on the front andfar right side of the dash. The driver's side front airbag is folded and
located in the steering wheel hub.The knee airbag is folded on the underside of
the dashboard on the driver's side. The text AIRBAG is embossed on the panel.
The passenger's side front airbag is folded
behind a panel located above the glove compart- ment.
WARNING
• The airbags in the vehicle are designed to be a SUPPLEMENT to-not a replacementfor-the three-point seat belts. For maxi-mum protection, wear seat belts at alltimes. Be aware that no system can pre-vent all possible injuries that may occur inan accident.
• Never drive with your hands on the steer-ing wheel pad/airbag housing.
• The front airbags are designed to helpprevent serious injury. Deployment occursvery quickly and with considerable force.During normal deployment and depend-ing on variables such as seating position,one may experience abrasions, bruises,swellings, or other injuries as a result ofdeployment of one or both of the airbags.
• When installing any accessory equipment,make sure that the front airbag system isnot damaged. Any interference in the sys-tem could cause malfunction.
Front airbag deployment
• The front airbags are designed to deploy dur-ing certain frontal or front-angular collisions,impacts, or decelerations, depending on thecrash severity, angle, speed and objectimpacted. The airbags may also deploy in certain non-frontal collisions where rapiddeceleration occurs.
• The airbag system sensors, which trigger thefront airbags, are designed to react to boththe impact of the collision and the inertialforces generated by it, and to determine ifthe intensity of the collision is sufficient forthe seat belt tensioners and/or airbags to bedeployed.
However, not all frontal collisions activate thefront airbags.
• If the collision involves a nonrigid object (e.g.,a snow drift or bush), or a rigid, fixed objectat a low speed, the front airbags will not nec-essarily deploy.
• Front airbags do not normally deploy in aside impact collision, in a collision from therear or in a rollover situation.
• The amount of damage to the bodyworkdoes not reliably indicate if the airbagsshould have deployed or not.

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NOTE
•Deployment of front airbags occurs only one time during an accident. In a collisionwhere deployment occurs, the airbagsand seat belt pretensioners activate.Some noise occurs and a small amountof powder is released. The release of thepowder may appear as smoke-like matter.This is a normal characteristic and doesnot indicate fire.
• Volvo's front airbags use special sensorsthat are integrated into the front seat beltbuckles. The point at which the airbagdeploys is determined by whether or notthe seat belt is being used, as well as theseverity of the collision.
• Collisions can occur where only one ofthe airbags deploys. If the impact is lesssevere, but severe enough to present aclear injury risk, the airbags are triggeredat partial capacity. If the impact is moresevere, the airbags are triggered at fullcapacity.
WARNING
• Do not use child safety seats or child booster cushions/backrests in the frontpassenger's seat. We also recommendthat occupants under 140 cm (4 feet7 inches) in height who have outgrownthese devices sit in the rear seat with theseat belt fastened. See also the Occu-pant Weight Sensor information.
• Never drive with the airbags deployed.The fact that they hang out can impair thesteering of your vehicle. Other safety sys-tems can also be damaged.
• The smoke and dust formed when theairbags are deployed can cause skin andeye irritation in the event of prolongedexposure.
Should you have questions about any componentin the SRS system, please contact a trained andqualified Volvo service technician or Volvo cus-tomer support: In the United States Volvo Car USA, LLC Customer Care Center 1 Volvo Drive P.O. Box 914Rockleigh, New Jersey 07647 1-800-458-1552www.volvocars.com/us In Canada Volvo Car Canada Ltd. Customer Care Centre9130 Leslie Street, Suite 101Richmond Hill, Ontario L4B 0B91-800-663-8255www.volvocars.com/ca
Airbag decals
Airbag decal on the outside of both sun visors

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Passenger's side airbag decal
WARNING
•Children must never be allowed in the front passenger's seat.
• Occupants in the front passenger's seatmust never sit on the edge of the seat, sitleaning toward the instrument panel orotherwise sit out of position.
• The occupant's back must be as uprightas comfort allows and be against the seatback with the seat belt properly fastened.
• Feet must be on the floor, e.g., not on thedash, seat or out of the window.
WARNING
• No objects or accessory equipment, e.g. dashboard covers, may be placed on,attached to, or installed near the air bagcover (the area above the glove compart-ment) or the area affected by airbagdeployment.
• There should be no loose articles, suchas coffee cups on the floor, seat, or dash-board area.
• Never try to open the airbag cover on thesteering wheel or the passenger's sidedashboard. This should only be done by atrained and qualified Volvo service techni-cian.
• Failure to follow these instructions canresult in injury to the vehicle's occupants.
Related information
• Airbags (p. 52)
• Occupant weight sensor (p. 56)
Occupant weight sensor
The Occupant Weight Sensor (OWS) is designed to meet the regulatory requirements ofFederal Motor Vehicle Safety Standard (FMVSS)208 and is designed to disable (will not inflate)the passenger's side front airbag under certainconditions.
Occupant Weight Sensor (OWS) indicator light
Disabling the passenger's side front airbag
Volvo recommends that ALL occupants (adults and children) shorter than 140 cm (4 feet7 inches) be seated in the back seat of any vehi-cle with a front passenger side airbag and beproperly restrained for their size and weight. The OWS works with sensors that are part of the front passenger's seat and seat belt. The sensors are designed to detect the presence of a properly

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seated occupant and determine if the passeng- er's side front airbag should be enabled (mayinflate) or disabled (will not inflate). The OWS will disable (will not inflate) the pas- senger's side front airbag when:
• the front passenger's seat is unoccupied, orhas small/medium objects in the front seat,
• the system determines that an infant is pres-ent in a rear-facing infant seat that is instal-led according to the manufacturer's instruc-tions,
• the system determines that a small child ispresent in a forward-facing child restraintthat is installed according to the manufactur-er's instructions,
• the system determines that a small child ispresent in a booster seat,
• a front passenger takes his/her weight off ofthe seat for a period of time,
• a child or a small person occupies the frontpassenger's seat.
The OWS uses a PASSENGER AIRBAG OFFindicator lamp which will illuminate and stay on toremind you that the passenger's side front airbagis disabled. The PASSENGER AIRBAG OFF indi-cator lamp is located in the overhead console,near the base of the rearview mirror.
NOTE
When the ignition is switched on, the OWS indicator light will illuminate for several sec-onds while the system performs a self-diag-nostic test.
However, if a fault is detected in the system:
• The OWS indicator light will stay on
• The SRS warning light will come on and stay on and a text message will be displayed.
WARNING
If a fault in the system is detected and indi- cated as described, be aware that the pas-senger's side front airbag will not deploy inthe event of a collision. In this case, the SRSsystem and Occupant Weight Sensor shouldbe inspected by a trained and qualified Volvoservice technician as soon as possible.
WARNING
• Never try to open, remove or repair any components in the OWS system. Thiscould cause the system to malfunction.Maintenance or repairs should only becarried out by an a trained and qualifiedVolvo service technician.
• The front passenger's seat should not bemodified in any way. This could reducepressure on the seat cushion, whichmight interfere with the OWS system'sfunction.

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WARNING
•No objects that add to the total weight on the seat should be placed on the frontpassenger's seat. If a child is seated inthe front passenger's seat with any addi-tional weight, this extra weight couldcause the OWS system to enable the air-bag, which might cause it to deploy in theevent of a collision, thereby injuring thechild.
• The seat belt should never be wrappedaround an object on the front passeng-er's seat. This could interfere with theOWS system's function.
• The front passenger's seat belt shouldnever be used in a way that exerts morepressure on the passenger than normal.This could increase the pressure exertedon the weight sensor by a child, andcould result in the airbag being enabled,which might cause it to deploy in theevent of a collision, thereby injuring thechild.
WARNING
• Keep the following points in mind with respect to the OWS system. Failure tofollow these instructions could adverselyaffect the system's function and result inserious injury to the occupant of the frontpassenger's seat:
• The full weight of the front seat passen-ger should always be on the seat cushion.The passenger should never lift him/herself off the seat cushion using thearmrest in the door or the center console,by pressing the feet on the floor, by sit-ting on the edge of the seat cushion, orby pressing against the backrest in a waythat reduces pressure on the seat cush-ion. This could cause OWS to disable thefront, passenger's side airbag.
WARNING
•Do not place any type of object on the front passenger's seat in such a way thatjamming, pressing, or squeezing occursbetween the object and the front seat,other than as a direct result of the correctuse of the Automatic Locking Retractor/Emergency Locking Retractor (ALR/ELR)seat belt.
• No objects should be placed under thefront passenger's seat. This could inter-fere with the OWS system's function.
Related information
• Driver/passenger-side airbags (p. 53)

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Side airbags
The side airbags, on the driver's and passenger sides, protect the chest and hip in a collision.
The side airbags are located in the front seats' outer backrest frames and help protect the driverand front seat passenger. A collision of a sufficiently violent force will trig- ger the sensors and one or more side airbags willinflate. The side airbags inflate between the seatoccupant and the door panel to help cushion theinitial impact of the collision. The airbag deflateswhen compressed by the collision. The side air-bags are normally only deployed on the side ofthe vehicle impacted by the collision.
WARNING
Volvo recommends contacting an authorized Volvo workshop for repairs. Incorrectly per-formed repairs to the side airbag systemcould impair function and lead to seriousinjury.
WARNING
Do not place any objects in the area between the outer edges of the seats and the doorpanels, as this could impair the function of theside airbags. Volvo recommends only using seat covers approved by Volvo. Other seat covers couldprevent the side airbags from functioningproperly.
WARNING
The side airbag is a supplement to the seat belt. Always wear your seat belt.
Related information
• Airbags (p. 52)
Inflatable curtain The inflatable curtain, Inflatable Curtain (IC), helps to prevent the driver and passengers fromstriking their heads on the inside of the vehicleduring a collision.
The inflatable curtains are installed along both sides of the inside of the roof and help protect occupants in the vehicle's outer seats.
IC
AIRBAG is embossed on the panels.
A collision of a sufficiently violent force will trig- ger the sensors and the inflatable curtain willinflate.

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WARNING
Volvo recommends contacting an authorized Volvo workshop for repair. Incorrectly per-formed repairs to the inflatable curtain systemcould impair function and lead to seriousinjury.
WARNING
Never hang or attach heavy objects in the handle in the ceiling. The hooks are onlyintended for lightweight garments (not forhard objects such as umbrellas). Never screw or mount anything to the vehi- cle's headlining, door pillars or side panels.This could impair the intended protectiveproperties. Volvo recommends only usingVolvo original parts that are approved forplacement in these areas.
WARNING
If objects are loaded higher than the upper edge of the side windows, leave a 10 cm (4in.) space between the objects and the win-dow. Objects placed closer to this couldimpede the function of the inflatable curtainconcealed inside the headlining.
WARNING
The inflatable curtain is a supplement to the seat belt. Always wear your seat belt.
Related information
•Airbags (p. 52)
Safety mode Safety mode is a feature that is triggered after a collision if there is potential damage to an impor-tant function in the vehicle, such as the fuellines, sensors for one of the safety systems, thebrake system, etc.
If the vehicle has been involved in a collision, the text Safety mode See Owner's manual may
appear in the instrument panel along with the warning symbol if the panel is undamaged andthe vehicle's electrical system is intact. The mes-sage indicates that one or more of the vehicle'sfunctions may be reduced.
WARNING
Never attempt to restart the vehicle if you smell fuel fumes when the message Safety
mode See Owner's manual is displayed in
the instrument panel. Leave the vehicle imme- diately.
If safety mode has been set, it may be possible to reset the system in order to start and move thevehicle a short distance, for example, if it is block-ing traffic.