2017 VOLVO V90 wheel torque

DRIVER SUPPORT
* Option/accessory.
272
Speed-dependent steering force Speed related power steering causes the steer- ing wheel force to increase with the speed of thecar in order to give the driver enhanced sensitiv-ity.
On motorways the steering feels firmer. When parking and at low speed steering is light andrequires only a slight effort.
NOTE
In certain situations the power steering may become too hot and then needs to be tempo-rarily cooled - during this time the powersteering operates with reduced power andturning the steering wheel may then be per-ceived to be slightly heavier. In parallel with the temporarily reduced steer- ing assistance, the driver display shows amessage.
Change the steering force level *To select the steering force level, go to the "Drive modes" section and see the description at thealternative INDIVIDUAL under the heading"Selectable drive modes". For the car models without a drive mode control with its INDIVIDUAL option, the selection ofsteering force is instead made via the centre dis-play's top view and the following search path:
SettingsMy CarDrive ModesSteering force
Selection of steering force is not accessible while turning is in progress.
Related information
•Drive modes
* (p. 400)
Roll Stability Control Roll Stability Control (RSC) is a stabiliser sys- tem that minimises the risk of overturning, forexample during sudden evasive manoeuvres or ifthe car skids.
The RSC system registers if and how much the car's lateral inclination changes. This informationis used to calculate the risk of the car overturn-ing. If the car is at risk, its electronic stability con-trol system engages, the engine torque isreduced and one or more wheels are braked untilthe car has regained its stability.
WARNING
Under normal driving conditions, the RSC sys- tem improves the car's road safety, but thismust not be taken as a reason to increasespeed. Always follow the normal precautionsfor safe driving.
Related information
• Electronic stability control (p. 273)
• Safety (p. 56)

DRIVER SUPPORT
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Lane assistance steers the car back into its lane.
Lane assistance warns with steering wheel vibrations23
.
Depending on settings, lane assistance acts in accordance with the following:
1. Steering assistance activated: When the car
is approaching a lane line, LKA will actively steer the car back into its lane by applying a slight torque to the steering wheel.
2. Warning activated: If the car is about to cross a lane line, the driver is warned by means ofan acoustic signal or vibration in the steeringwheel.
NOTE
When a direction indicator is switched on, there are no steering corrections or alertsfrom Lane assistance.
WARNING
Lane assistance is merely a driver aid and does not engage in all driving situations ortraffic, weather or road conditions. The driver always bears ultimate responsibility for ensuring that the vehicle is driven safelyand that applicable laws and road traffic regu-lations are followed.
Steering assistanceA precondition for the functioning of the LKA steering assistance is that the driver

STARTING AND DRIVING
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11. Start the engine in the car with the dis-
charged battery.
IMPORTANT
Do not touch the connections between cable and car during the starting attempt. There is arisk of sparks forming.
12. Remove the jump leads in reverse order -first the black and then the red. Make sure that none of the black jump lead's clamps comes into contact with the car'spositive jump-starting point/donor battery'spositive terminal or the clamp connected tothe red jump lead.
WARNING
• The battery can generate oxyhydrogen gas, which is highly explosive. A spark canbe formed if a jump lead is connectedincorrectly, and this can be enough forthe battery to explode.
• The battery contains sulphuric acid, whichcan cause serious burns.
• If sulphuric acid comes into contact witheyes, skin or clothing, flush with largequantities of water. If acid splashes intothe eyes - seek medical attention imme-diately.
Related information
•Starter battery (p. 530)
• Ignition positions (p. 385)
• Starting the car (p. 386)
• Opening and closing the bonnet (p. 514)
Gearbox
The gearbox is part of the car's driveline (power transmission) between engine and drive wheels.The function of the gearbox is to change thegear ratio depending on speed and powerrequirements.
There are two main types of gearbox, manual and automatic. The manual gearbox has six gears. The automatic gearbox can have either eight gears or six gearsdepending on which engine the car is equippedwith. The number of gear changes means thatthe engine's torque and power range can beused effectively. It is also possible to select gears manually with the automatic gearbox. The driver display respec-tively shows which gear or gear position is cur-rently in use.
IMPORTANT
To prevent damage to any drive system com- ponents, the working temperature of thegearbox is checked. If there is a risk of over-heating, a warning symbol illuminates in thedriver display and a text message is shown -follow the recommendation given.
Symbols in the driver displayIf a fault should occur in the gearbox, the driver display shows a symbol and a message.

STARTING AND DRIVING
* Option/accessory.405
Level control * and shock absorption
Level control and shock absorption are regula- ted automatically in the car.
With rear level control, the car maintains the same height at the rear regardless of load. Levelcontrol can also occur even after the car hasbeen parked.
Shock absorption (Four-C)The shock absorption is adapted according to theselected drive mode and according to the speedof the car. Shock absorption is normally set forthe best possible comfort and is regulated con-tinuously depending on the road surface, thecar's acceleration, braking and cornering.
Settings for level control
Deactivation of air suspension and level control
In certain cases, the function must be deacti- vated, e.g. before the car is raised with a jack *.
The difference in level created by raising the car with a jack can otherwise cause problems for theair suspension. Deactivating the function via the centre display:1. Press
Settings in the top view.
2. Press
My CarSuspension .
3. Select
Disable Leveling Control.
Change the damping level 11
Cars with active chassis (Four-C) and without the drive mode function
* can adjust the shock
absorption level via the centre display: 1. Press
Settings in the top view.
2. Tap on
My CarDrive ModeSuspension Control and select the level.
During transportDuring transport of the car on a ferry, train or truck, the car must be lashed around the tyresand not around other parts of the chassis.Changes in the air suspension may occur duringtransport, which could affect the lashing nega-tively.
Related information
• Drive modes
* (p. 400)
• Loading (p. 227)
All-wheel drive
*
All-wheel drive, AWD (All Wheel Drive), means that the car is driving all four wheels at the sametime, which improves traction.
To achieve the best possible traction and prevent wheel spin the motive force is distributed auto-matically to the wheels with the best grip. Thesystem continuously calculates the need for tor-que to the rear wheels, and can immediatelyredistribute up to half of the motor's torque to therear wheels. All-wheel drive also has a stabilising effect at higher speeds. Under normal driving conditions,the majority of power is transmitted to the frontwheels. When stationary, the all-wheel drive isalways engaged in preparation for maximum trac-tion during acceleration. All-wheel drive characteristics vary depending on the selected drive mode *.
Related information
• Drive modes
* (p. 400)
11
Depends on the car's equipment.

WHEELS AND TYRES
* Option/accessory.497
Crank up the jack
* so that it makes contact
with the car's jacking point. Check that the head of the jack is correctly positioned in thejacking point so that the bump in the centreof the head fits into the jacking point holeand the base is positioned vertically belowthe jacking point. Also make sure you turnthe jack so that the crank is as far away fromthe side of the car as possible, at which pointthe jack's arms are perpendicular to thedirection of the car.
WARNING
Never crawl under the car when it is raised on the jack. Passengers must leave the car when it is raised on the jack. If a wheel must bechanged in a trafficked environment, passen-gers must stand in a safe place.
9. Lift the car so that the wheel is free. Remove the wheel bolts and lift off the wheel.
Related information
• When changing wheels (p. 495)
• Raise the car (p. 512)
• Fitting the wheels (p. 497)
• Tool kit (p. 500)
Fitting the wheels Instructions for fitting a wheel when changing wheels.
WARNING
Never crawl under the car when it is raised on the jack. Passengers must leave the car when it is raised on the jack. If a wheel must bechanged in a trafficked environment, passen-gers must stand in a safe place.
1. Clean the contact surfaces between wheel and hub.
2. Put on the wheel. Tighten the wheel bolts thoroughly. Do not use lubricant on the threads of the
wheel bolts.
3. Lower the car so that the wheels cannot rotate. 4. Tighten the wheel bolts crosswise. It is impor-
tant that the wheel bolts are tightened prop- erly. Tighten to 140 Nm. Check the tighten-ing torque with a torque wrench.
5. Refit the plastic caps on the wheel bolts.
NOTE
• After a tyre has been inflated, always refit the dust cap in order to avoid damage tothe valve from gravel, dirt, etc.
• Only use plastic dust caps. Metal dustcaps can rust and become difficult tounscrew.
Related information
•Removing a wheel (p. 495)
• When changing wheels (p. 495)
• Spare wheel
* (p. 498)

WHEELS AND TYRES
* Option/accessory.
498
Wheel bolts
Wheel bolts are used to attach the wheels to the hubs.
IMPORTANT
The wheel bolts must be tightened to 140 Nm. Overtightening or loose tightening maydamage the nuts and the bolts.
Only use rims that are tested and approved by Volvo and which are Volvo genuine accessories. Check the tightening torque of the wheel bolts with a torque wrench. Do not use lubricant on the threads of the wheel
bolts.
Locking wheel bolts *In the foam block under the cargo area floor there is space for the sleeve for the lockablewheel bolts.
Related information
•When changing wheels (p. 495)
Spare wheel
*
The spare wheel, the Temporary spare type, can be used to temporarily replace a punctured nor-mal wheel.
The illustration is schematic - the shape of the foam block may vary depending on car model.
The spare wheel is located in the spare wheel well with the outside down. The same bolt runsthrough to secure the spare wheel and the foamblock. The foam block contains all tools forchanging a wheel, see the section "Tool kit". The car's handling may be altered by the use of the spare wheel. The spare wheel must bereplaced by a normal wheel as soon as possible. The spare wheel is smaller than the regular wheel, which will affect the car's ground clear-ance. Pay attention to high kerbs and do notmachine wash the car. •
Follow the manufacturer's recommended tyrepressure for the spare wheel.
• On all-wheel drive cars the drive on the rearaxle can be disconnected.
• If the spare wheel is fitted on the front axle, itis not possible to use snow chains at thesame time.
• The spare wheel must not be repaired.
IMPORTANT
• Never drive faster than 80 km/h (50 mph) with a spare wheel on the car.
• The car must never be driven fitted withmore than one "Temporary Spare" wheel.
Taking out the spare wheel1. Fold up the cargo area floor, from the rear
and forwards.
2. Undo the retaining screw.
3. Lift out the foam block with its tools.
4. Lift out the spare wheel.
Storing the punctured tyre1. Put the tools back in the foam block and lift the foam block back into the car.
2. Screw in the foam block using the mounting screws and then fold down the cargo area floor.
3. Place the punctured tyre in the cargo area.