wheel torque VOLVO S90 2020 Quick Guide

STARTING AND DRIVING
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* Option/accessory.391
Braking assist after a collision
In a collision in which the activation level is reached for the pyrotechnic seat belt tension-ers or airbags, or if a collision with a large ani-mal is detected, the vehicle's brakes will beautomatically activated. This function isintended to help prevent or reduce the effectsof any subsequent collision.
After a serious collision, it may no longer be possible to control and steer the vehicle. Inorder to avoid or mitigate a possible furthercollision with a vehicle or an object in the vehi-cle's path, the brake assist system is activatedautomatically to help stop the vehicle safely. If braking is not appropriate, e.g. if there is a risk of being hit by passing traffic, the drivercan override the system by depressing theaccelerator pedal. This function assumes that the brake system is intact after a collision.
Related information
Rear Collision Warning
* (p. 326)
BLIS
* (p. 327)
Brake functions (p. 382)
Transmission
The transmission is part of the vehicle's drive- line (power transmission) between the engineand the drive wheels. The function of thetransmission is to change gears dependingon speed and power needs.
The vehicle has an 8-speed automatic trans- mission. The number of gears allows theengine's torque and power band to be effec-tively utilized. Two of the gears are overdrivegears that save fuel when driving at a constantengine speed. Manual shifting is also possible.The instrument panel shows the gear currentlyin use.
Related information
Automatic transmission (p. 391)
Automatic transmission
In vehicles with an automatic transmission, the system selects the gear so that drivingwill be as energy-efficient as possible. Thetransmission also has a manual mode.
The transmission is available in different ver- sions. The gear selector indicates which trans-mission the vehicle has. The various gearselectors have different functions.
Overview of large gear selector and gear shift pattern in the instrument panel
4 Hill Start Assist

STARTING AND DRIVING
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* Option/accessory.399
All Wheel Drive (AWD) *
All-wheel drive (AWD 8
), also called four-
wheel drive, means that power is distributed to all four wheels, which improves traction.
To achieve the best traction, power is auto- matically directed to the wheels that have thebest grip. The system continuously calculatesthe need for torque to the rear wheels, andcan immediately redistribute up to half of theengine's torque to the rear wheels. All-wheel drive also has a stabilizing effect at higher speeds. In normal driving conditions,most of the engine's power is directed to thefront wheels. When the vehicle is stationary,all-wheel drive is always activated in prepara-tion for maximum traction during acceleration. All-wheel drive reacts differently depending on which drive mode is selected.
Related information
Drive modes
* (p. 399)
Transmission (p. 391)
Drive modes
*
Drive modes affect the vehicle's driving cha- racteristics in different ways to enhance andsimplify the driving experience in certaintypes of situations.
Drive modes enable easy access to the vehi- cle's many functions and settings in differentdriving situations. The following systems areadapted to help optimize driving characteris-tics in each drive mode: Steering
Engine/transmission/all-wheel drive
*
Brakes
Shock absorbers
Instrument panel
Start/Stop function
Climate control settings
Select the drive mode that is adapted to the current driving conditions. Keep in mind thatnot all drive modes are available in all situa-tions.
Available drive modesWhen the engine is started, the vehicle will be in Comfort mode and the start/stop function
will be activated. Drive mode can be changed once the vehicle is started, e.g. to
Individual
mode. Once Individual mode is selected, you
can adjust settings to personal preferences, e.g. to show the tachometer.
Comfort
Comfort is the vehicle's default mode. This
setting offers driving comfort, light steering and soft suspension. In
Comfort mode, no tachometer will be dis-
played in the instrument panel 9
.
Eco
Adapt the vehicle for more fuel-efficient and eco-friendly driving with Eco mode.
In this mode, the Start/Stop function is acti- vated and certain climate settings arereduced. When driving in
Eco mode, an ECO gauge
indicating how economical the driving is will be displayed in the instrument panel.
8 All Wheel Drive
9 Only applies to vehicles with 8-inch instrument panels.

WHEELS AND TIRES
* Option/accessory.515
Jack*
The jack can be used to lift the vehicle to e.g. change a wheel.CAUTION
When not in use, the jack
* should be
kept in its storage compartment under the cargo compartment floor.
The jack provided with your vehicle isintended to be used only in temporarysituations such as changing wheels inthe event of a flat tire. Only the jackthat came with your particular modelshould be used to lift the vehicle. If thevehicle needs to be lifted more fre-quently or for a prolonged period, usinga garage jack or hoist is recommended.Always follow this device's instructionsfor use.
The jack needs to be cranked together to the correct position in order to fit. For vehicles with
Leveling Control*
: If the
vehicle is equipped with the optional pneu- matic suspension, it must be turned off beforethe vehicle is lifted on a jack.
Related information
Tool kit (p. 514)
Hoisting the vehicle (p. 549)
Wheel bolts
The wheel bolts hold the wheel in place on the wheel hub.
Only use rims that have been tested and approved by Volvo and are included in Volvo'soriginal product range. Use a torque wrench to check that the wheel bolts are tightened correctly. Do not grease the wheel bolt threads.
WARNING
The wheel bolts may need to be tightened again several days after a wheel change.Temperature fluctuations and vibrationscan cause them to loosen slightly.
CAUTION
The wheel bolts should be tightened to 140 Nm (103 ft. lbs.). Over-tightening orunder-tightening could damage the threa-ded joints.
Locking wheel bolts *A tool for removing the locking wheel bolts is located in the foam block under the cargocompartment floor.
Related information
Removing a wheel (p. 516)
Installing a wheel (p. 518)

WHEELS AND TIRES
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* Option/accessory.519
4. Tighten the wheel bolts in a crisscross pat-
tern (as shown in illustration). It is impor- tant that the wheel bolts are securelytightened. Tighten to 140 Nm (103 ft. lbs.).Use a torque wrench to check torque.
5. Press the plastic covers onto the wheelbolts.
6. Check the tire inflation pressure and store the new inflation pressure in the tire pres- sure monitoring system *.
WARNING
The wheel bolts may need to be tightened again several days after a wheel change.Temperature fluctuations and vibrationscan cause them to loosen slightly.
NOTE
After inflating a tire, always replace the valve cap to help prevent valve damagecaused by gravel, dirt, etc.
Use plastic valve caps only. Metal capscould corrode and become difficult toremove.
Related information
When changing wheels (p. 514)
Hoisting the vehicle (p. 549)
Jack
* (p. 515)
Tool kit (p. 514)
Removing a wheel (p. 516)
Saving a new inflation pressure in the monitoring system
* (p. 511)
Checking tire pressure (p. 507)
Spare wheel 13
The spare wheel is a Temporary Spare and can be used to temporarily replace a punc- tured tire on one of the vehicle's regularwheels.
The spare tire is only intended for temporary use. Replace it with a normal wheel as soon aspossible. The driving characteristics of the vehicle change and ground clearance reduces whenthe spare wheel is used. Do not wash the vehi-cle in an automatic car wash while using theTemporary Spare. The recommended tire pressure must be maintained regardless of at which position thetemporary spare wheel is used on the vehicle. If the spare wheel is damaged, a new one can be purchased from a Volvo retailer.
WARNING
Current legislation prohibits the use of the "Temporary Spare" tire other than as atemporary replacement for a puncturedtire. It must be replaced as soon as possi-ble by a standard tire. Road holding andhandling may be affected with the "Tempo-rary Spare" in use. Do not drive faster than80 km/h (50 mph).
13 Not available on all models.