2018 VOLVO S90 maintenance

SAFETY
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* Option/accessory.47
WARNING
Do not squeeze box-like cargo between the rear seat cushion and the front seat backrest. If the rear seat backrests are folded down, cargo must be secured to prevent it from slid-ing forward against the front seat backrests inthe event of a collision.
WARNING
If a rear seat backrest is folded down or if a rear-facing child restraint is being used in therear seat, the seat in front must be moved for-ward so that it does not come into contactwith the backrest or child restraint.
Seating positionFor WHIPS to provide optimal protection, the driver and passenger must be seated correctlyand the system's function must not be impededin any way. Set the front seat to the correct seating position before starting to drive. The driver and the front seat passenger should sit in the center of the seat with their heads asclose as possible to the head restraints.
Related information
•Safety (p. 42)
• Manual front seats (p. 184)
• Power front seats
* (p. 185) •
Rear Collision Warning (p. 336)
Seat belts
Seat belts should always be worn by all occu- pants in your vehicle. Children should be prop-erly restrained using an infant seat, adjustablechild seat or booster cushion as determined byage, weight and height.
Most states and provinces make it mandatory for occupants of a vehicle to use seat belts.
Seat belt maintenanceCheck periodically that the seat belts are in goodcondition. Use water and a mild detergent forcleaning. Check the seat belt mechanism's func-tion as follows: attach the seat belt and pull rap-idly on the strap.

SAFETY
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57
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.
Passenger'sseat occu-pancy status
OWS indi-cator lightstatus
Passenger'sside front air-bag status
Seat unoccu- pied OWS indi-cator lightlights up.Passenger'sside front air-bag disabled
Seat occu-pied by lowweight occu- pant/object AOWS indi-
cator light lights up Passenger'sside front air-
bag disabled
Seat occu-pied by heavyoccupant/object OWS indi-cator light is
not lit Passenger'sside front air-bag enabled
A
Volvo recommends that children always be properly restrained in appropriate child restraints in the rear seats. Do not assumethat the passenger's side front airbag is disabled unless thePASSENGER AIRBAG OFF indicator lamp is lit. Make sure thechild restraint is properly installed. If there is any doubt as to thestatus of the passenger's side front airbag, move the childrestraint to the rear seat.
The OWS is designed to enable (may inflate) the passenger's side front airbag in the event of acollision anytime the system senses that a per-son of adult size is sitting properly in the frontpassenger's seat. The PASSENGER AIRBAGOFF indicator lamp will be off and remain off. If a person of adult size is sitting in the front pas- senger's seat, but the PASSENGER AIRBAGOFF indicator lamp is on, it is possible that the

DISPLAYS AND VOICE CONTROL
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103
Service messages
The following table lists a selection of important service messages and what they mean.
MessageMeaning
Stop safelyAStop and switch off the engine. Serious risk ofdamage - contact a work- shopB
.
Turn off engineA Stop and switch off the engine. Serious risk ofdamage - contact a work- shop
B
.
Service urgent Drive to work- shop
A Contact a workshop
B
to
have the vehicle inspected immediately.
Service requiredA Contact a workshop
B
to
have the vehicle inspected as soon as possible.
Regular main- tenance Book time for maintenanceTime for service - contact a workshop B
. Shown
before the next service date.
Regular main- tenance Time for main- tenanceTime for service - contact a workshop B
. Shown on
the next service date.
MessageMeaning
Regular main- tenance Maintenance overdueTime for service - contact a workshop B
. Shown when
the date for service has passed.
Temporarily offA A function has been tem- porarily deactivated andwill be reactivated auto-matically while driving orafter the engine is restar-ted.
A
Part of message, shown along with information on the location of the problem.
B An authorized Volvo workshop is recommended.
Related information
• Handling messages in the instrument panel (p. 103)
• Handling messages saved from the instru-ment panel (p. 105)
• Messages in the center display (p. 138)
Handling messages in theinstrument panel
Messages in the instrument panel are controlled using the right-side steering wheel keypad.

DRIVER SUPPORT
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* Option/accessory.283
NOTE
•The greater the vehicles' speed, the greater the distance between them for aset time interval.
• Only use the time intervals permitted bylocal traffic regulations.
• The set time interval is also used by theAdaptive Cruise Control and Pilot Assistfunctions.
WARNING
•Only use a time interval suitable for the current traffic conditions.
• The driver should be aware that shorttime intervals give them limited time toreact and act to any unforeseen trafficsituation.
Related information
•
Distance Alert
* (p. 280)
Distance Alert limitations36
Distance Alert functionality may be reduced in certain situations.WARNING
• The radar sensor has a limited field of vision. In some situations, it may detect avehicle later than expected or not detectother vehicles at all.
• The radar sensor cannot cover all drivingsituations and traffic, weather and roadconditions.
• The driver is responsible for maintaining asafe distance and speed and must inter-vene if the various driver support systemsdo not maintain a suitable speed or suita-ble distance to the vehicle ahead.
• Maintenance of radar sensor componentsmay only be performed by a trained andqualified Volvo technician.
• Strong sunlight, reflections from the roadsurface, strong lighting contrasts or usingsunglasses may make the warning light inthe windshield difficult to see. Poorweather or winding roads can affect theradar sensor's capacity to detect vehiclesahead.
• A vehicle's size (e.g., a motorcycle) canalso affect the radar sensor's capacity todetect another vehicle. This may result inthe warning light illuminating at a shorter
36
The Distance Alert function is only available in vehicles that can display information on the windshield with a head-up display.

DRIVER SUPPORT
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285
Adaptive Cruise Control regulates speed by accelerating and braking. It is normal for thebrakes to emit a slight sound when they arebeing used to adjust speed. Adaptive Cruise Control always attempts to regu- late speed smoothly. The driver must apply thebrakes in situations requiring immediate braking.For example, when there are great differences inspeed between vehicles or if the vehicle aheadbrakes suddenly. Due to limitations in the radarsensor, braking may occur unexpectedly or not atall. Adaptive Cruise Control is designed to follow a vehicle ahead in the same lane and maintain atime interval to that vehicle set by the driver. If theradar sensor does not detect a vehicle ahead, itwill instead maintain the speed set by the driver.This will also happen if the speed of the vehicleahead exceeds the set speed for your vehicle.
• Adaptive Cruise Control can follow anothervehicle at speeds from a standstill up to200 km/h (125 mph).
WARNING
• Adaptive Cruise Control is not a collision avoidance system. The driver is alwaysresponsible and must intervene if the sys-tem fails to detect a vehicle ahead.
• Adaptive Cruise Control does not brakefor people or animals and does not brakefor small vehicles, such as bikes andmotorcycles. Similarly, it does not brakefor low trailers, oncoming, slow-moving orstationary vehicles and objects.
• Do not use Adaptive Cruise Control indemanding situations, such as in city traf-fic, at intersections, on slippery surfaces,with a lot of water or slush on the road, inheavy rain/snow, in poor visibility, onwinding roads, or on on/off ramps.
CAUTION
Maintenance of Adaptive Cruise Control com- ponents may only be performed by a work-shop – an authorized Volvo workshop is rec-ommended.
Overview
Controls
Function buttons and symbols 38
.
: Activates Adaptive Cruise Control from
standby mode and resumes the set speed
: Increases the set speed
: From standby mode - activates the
Adaptive Cruise Control and stores the cur- rent speed
: From active mode - deactivates/
switches the Adaptive Cruise Control to standby mode
: Reduces the set speed
Increases the time interval to the vehicle ahead
38 Note: This illustration is general and details may vary depending on model.

DRIVER SUPPORT
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301
WARNING
•The Pilot Assist function is supplementary driver support intended to facilitate driv-ing and help make it safer – it cannothandle all situations in all traffic, weatherand road conditions.
• The driver is advised to read all sectionsin the Owner's Manual about this functionto learn of its limitations, which the drivermust be aware of before using the func-tion (see the link list at the end of thisarticle).
• Pilot Assist should only be used if thereare clear lane lines painted on each sideof the lane. All other use will increase therisk of contact with nearby obstacles thatcannot be detected by the functions.
• Pilot Assist is not a substitute for the driv-er's attention and judgment. The driver isalways responsible for ensuring the vehi-cle is driven in a safe manner, at theproper position within the lane, at theappropriate speed, with an appropriatedistance to other vehicles, and in accord-ance with current traffic rules and regula-tions.
NOTE
Depending on market, this function may be either Standard or Optional.
Pilot Assist regulates speed by accelerating and braking. It is normal for the brakes to emit a slightsound when they are being used to adjust speed. Pilot Assist attempts to smoothly regulate speed. The driver must apply the brakes in situationsrequiring immediate braking. For example, whenthere are great differences in speed betweenvehicles or if the vehicle ahead brakes suddenly.Due to limitations in the camera and radar sen-sor, braking may occur unexpectedly or not at all. Pilot Assist is designed to follow a vehicle ahead in the same lane and maintain a time interval tothat vehicle set by the driver. If the radar sensordoes not detect a vehicle ahead, it will insteadmaintain the speed set by the driver. This will alsohappen if the speed of the vehicle aheadexceeds the set speed for your vehicle.
• Pilot Assist can follow another vehicle atspeeds from a standstill up to 200 km/h(125 mph).
• Pilot Assist can provide steering assistancefrom near-stationary speeds up to 140 km/h(87 mph).
WARNING
• Pilot Assist is not a collision avoidance system. The driver must intervene if thesystem fails to detect a vehicle ahead.
• Pilot Assist does not brake for people,animals, objects, small vehicles (e.g.cycles and motorcycles), low trailers aswell as oncoming, slow or stationary vehi-cles.
• Do not use Pilot Assist in demanding sit-uations, such as in city traffic, at intersec-tions, on slippery surfaces, with a lot ofwater or slush on the road, in heavy rain/snow, in poor visibility, on winding roads,on highway on- or off-ramps, or with atrailer connected to the vehicle.
CAUTION
Maintenance of the integrated components in Pilot Assist may only be performed by a work-shop – an authorized Volvo workshop is rec-ommended.
In curves and forks in the roadPilot Assist is designed to interact with the driver. The driver should never wait for steering assis-tance from Pilot Assist, but instead should alwaysbe ready to increase his or her own steeringefforts, particularly in curves.

DRIVER SUPPORT
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The previous illustration 65
shows that Pilot Assist
is set to maintain a speed of 110 km/h (68 mph) and that there is no target vehicle ahead to fol-low. In this example, Pilot Assist will provide steering assistance because it can detect the lane's sidemarking lines.
Related information
• Pilot Assist (p. 300)
Radar sensor
The radar sensor is used by several driver sup- port systems to detect other vehicles.
Note: This illustration is general and details may vary depending on model.
The radar sensor is used by the following func- tions:
• Distance Alert
*
• Adaptive Cruise Control
*
• Lane Keeping Aid
• Pilot Assist
*
• City Safety
Any modifications to the radar sensor may makeits use illegal.
Related information
• Radar sensor limitations (p. 316)
• Recommended maintenance for the radarsensor (p. 319)
• Radar sensor type approval (p. 319)
65
Note: This illustration is general and details may vary depending on model.

DRIVER SUPPORT
319
Recommended maintenance for theradar sensor
In order for the camera/radar sensor to function properly, the area of the windshield in front of theunit must be kept free of dirt, ice, snow, etc. andshould be washed regularly with water and carwashing detergent.
NOTE
Dirt, ice and snow covering the camera and radar unit reduce their function and can makemeasurement impossible. It could cause functions to be reduced, deac- tivated completely or produce an incorrectfunction response.
Related information
•Radar sensor (p. 315)
Radar sensor type approval
The type approval for the vehicle radar sensor in the ACC 67
, PA 68
and BLIS 69
functions can be
read here.
ACC 67
, PA 68
and BLIS 69USA & Canada: FCC ID: L2C0054TR IC: 3432A-0054TR FCC ID: L2C0055TR IC: 3432A-0055TRThis device complies with Part 15 of the FCC Rules and with Industry Canada license-exemptRSS standard(s). Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may causeundesired operation. Cet appareil est conforme aux CNR d