power steering VOLVO V90 2018 Owner´s Manual

STARTING AND DRIVING
* Option/accessory.
442
Trailer Stability Assist *
Trailer Stability Assist (TSA 10
) is a function
designed to help stabilize a vehicle that is tow- ing a trailer when the vehicle and trailer havebegun to sway. The function is part of the Elec- tronic Stability Control system ESC 11
.
Reasons for swayingA vehicle towing a trailer may begin to sway for various reasons. Normally this only occurs at highspeeds. However, if the trailer is overloaded orunevenly distributed, e.g. too far back, there is arisk of swaying even at low speeds. Swaying may be caused by factors such as:
• The vehicle and trailer are hit by a sudden, strong crosswind.
• The vehicle and trailer are traveling on anuneven road or over a bump.
• Sudden movements of the steering wheel.
Once swaying has begun, it can be difficult orimpossible to stop it. This makes the vehicle andtrailer difficult to control and there is a risk ofswerving into oncoming traffic or driving off theroad.
Trailer Stability Assist functionTrailer Stability Assist continuously monitors thevehicle's movements, particularly lateral move- ments. If swaying is detected, the brakes areapplied individually on the front wheels, which hasa stabilizing effect on the vehicle and trailer. Thisis often enough to enable the driver to regaincontrol of the vehicle. If the Trailer Stability Assist function's first attempt is not adequate to stop the swayingmotion, the brakes are applied on all wheels andengine power is temporarily reduced. As theswaying motion begins to decrease and the vehi-cle and trailer have once again become stable,TSA stops regulating the brakes/engine powerand the driver regains control of the vehicle.
NOTE
Trailer Stability Assist is deactivated if the driver selects the sport mode by deactivating
ESC in the center display's menu system.
Trailer Stability Assist may not intervene if the driver tries to compensate for the swaying motionby moving the steering wheel rapidly, becausethe system will then not be able to determine if itis the trailer or the driver causing the swaying.
When Trailer Stability Assist is activated, the
ESC symbol is
displayed in the instrument panel.
Related information
• Driving with a trailer (p. 440)
• Electronic Stability Control (p. 268)
10
Trailer Stability Assist
11 Electronic Stability Control

AUDIO, MEDIA AND INTERNET
465
Selecting sub-channels
To listen to a station's sub-channel(s), tap the station on the screen or press the forward/backarrow keys on the right-side steering wheel key-pad or below the screen. Sub-channels can also be saved as radio favor- ites. If you tap a sub-channel favorite, it may take up to 6 seconds before the channel becomes audi-
ble. If you tap a station while you are out of digital range of the transmitter,
No reception will be
displayed.
Related information
• HD Radio
™ (p. 462)
• Activating and deactivating the HD Radio
™
(p. 464)
• Changing waveband and radio station (p. 459)
• Searching for a radio station (p. 460)
• HD Radio
™ limitations (p. 465)
HD Radio™ limitations
Limitations
• Main channel vs. sub-channels (FM only)
:
The main channel is the only channel that can receive in hybrid mode (both digital andanalog). If a frequency has sub-channels,they are broadcast in digital mode only. Themain FM channel will be displayed as, forexample, "WRIF-FM HD1". The sub-FMchannels will be displayed as"WRIF-FMHD2", "WRIF-FM HD3", etc.
• Reception coverage area
: Due to current
IBOC transmitter power limitations, thereception coverage area in digital mode issomewhat more limited than the station'sanalog coverage area. Be aware that, like allradio transmission technology, terrain, time ofday, vegetation and buildings can have apositive or negative effect on radio reception.
• Analog to digital/digital to analog blend-ing
: Analog to digital blending will occur as
the signal strength reaches a preset thresh-old in the receiver. This will be noticeable infringe areas (areas with weak reception) andis normal.
NOTE
There may be a noticeable difference in sound quality when a change from analogueto digital or digital to analogue occurs, suchas:
• Volume increase or decrease
• Equalizer settings, i.e., Bass/ Midrange/Treble cut or boost
• Time alignment (Digital program materialin extreme cases can be as much as 8seconds behind the analogue). This willnoticeable as a "stuttering" effect.
The above items are dependant on thebroadcaster's equipment settings and donot indicate a fault in the vehicle's radioreceiver or antenna systems .
Related information
•HD Radio
™ (p. 462)
• Activating and deactivating the HD Radio
™
(p. 464)
• HD Radio
™
sub-channels (p. 464)

||
MAINTENANCE AND SERVICE
* Option/accessory.
598
FunctionAA
Right-side headlight, some mod- els with LED B 15
– –
Heated windshield
*, left side Shunt
Heated windshield
*, left side 40
Headlight washers
*25
Windshield washer 25
Transmission control module 15
Horn 20
Alarm siren
* 5
Brake system control module (valves, parking brake) 40
Wipers 30
Rear window washer 25
Heated windshield
*, right side 40
Parking heater
* 20
Brake system control module (ABS pump) 40
FunctionAA
– –
Heated windshield
*, right side Shunt
Fed when ignition is on: engine control module, transmissioncomponents, electrical powersteering, central electrical mod-ule, brake system control mod-ule 5
– –
Right-side headlight 7.5 Right-side headlight, some mod- els with LED
B 15
– –
– –
Battery connection control mod- ule 5
Airbags 5
FunctionAA
Left-side headlight 7.5 Left-side headlight, some mod- els with LED
B 15
Accelerator pedal sensor 5
A
Ampere
B LED (Light Emitting Diode)
Related information
• Fuses and fuseboxes (p. 594)
• Replacing fuses (p. 595)

||
MAINTENANCE AND SERVICE
* Option/accessory.
600 Fuse pliers are provided on the inside of the fuse box cover to assist in removing and insertingfuses. There are also spaces for several extra fuses in the
distribution box in the engine compart-
ment .
Positions
•Fuses 1, 3-21, 23-36, 39-53 and 55-59 are "Micro" fuses.
• Fuses 2-22, 37-38 and 54 are "MCase"fuses and should only be replaced by a work- shop 22
.
FunctionAA
– –
Electrical outlet in tunnel console between rear seats * 30
– –
Movement sensor
* 5
Media player 5
Instrument panel 5
Center console buttons 5
Sun sensor 5
FunctionAA
– –
– –
Steering wheel module 5
Module for start knob and parking brake controls 5
Heated steering wheel
* module 15
– –
– –
– –
– –
Climate system control module 10
– –
Data link connector OBD-II 10
Center display 5
Climate system blower module (front) 40
USB HUB 5
FunctionAA
Instrument lighting; Interior lighting; Rearview mirror auto-dim function
*;
Rain and light sensors *; Rear tun-
nel console keypad, rear seat *;
Power front seats *; Rear door con-
trol panels; Climate system blower module left/right 7.5
Control module for driver support functions
5
Panoramic roof with sun curtain
*20
Head-up display
* 5
Passenger compartment lighting 5
– –
Ceiling console display (seat belt reminder/front passenger side air-bag indicator) 5
– –
Humidity sensor 5
Door module in right-side rear door 20
Fuses in the trunk/cargo compart- ment
10
22
An authorized Volvo workshop is recommended.

INDEX
649
Sensors
air quality 207
climate 203
Sensus connection and entertainment 30
Sensus Navigation 353
Service position 622
Service program 566
Set time interval 287
settings 137 Categories 138
contextual 135
resetting 137
settings menu 137
Shiftlock 417 deactivate 417
Side airbag 59
Side Impact Protection System 59, 60
SIM card 501
SIPS (Side Impact Protection System) 59, 60 Sirius Satellite radio Travel link 470
SiriusXM ® Satellite radio
traffic information 466, 467, 468
Ski hatch 558
Slippery conditions 432
Slippery road conditions 432
Software updates 33
Sound settings 454, 495 phone 496
playing media 476, 477
text message 495
Spare tire 537, 538
Speed camera 355
Speed Limiter 272, 275, 276, 279 getting started 273
shut down 275
temporary deactivation 274
Speed symbols, tires 522
Spin control 268
Stability and traction control system 268, 271 operation 269, 270
Stability system 268
Stains 606, 608, 609, 610, 611
Start/Stop 424 deactivate 425
Driving 424
limitations 426
Start and lock system type designations 246
Start battery 439, 589 overload 438
Start engine 400Starting the engine after a collision 62
Start the vehicle 400
Steel cargo grid 560Steering assistance at risk of colli-
sion 366, 367, 368, 369, 370, 371, 372, 374 Steering assistance at risk of rear-end col-
lision 371, 372 Steering power level, see Steering wheel
resistance 266 Steering resistance at risk of head-on colli-
sion 369, 370
Steering wheel 199, 200 heating 219, 220
keypad 199
paddle 199
steering wheel adjustment 200
Steering wheel keypad 199
Steering wheel paddles 415Steering wheel resistance, speed-depend- ent 266
Stone chips and scratches 618, 619
Stop/start function 424
Storage compartments 548 center console 549
glove compartment 553
sun visor 554