2015 VOLVO S80 traction control

07 During your trip
Towing a trailer
07
288
NOTE
•When parking the vehicle with a trailer on a hill, apply the parking brakebefore putting the gear selector in
P.
Always follow the trailer manufactur-er's recommendations for wheelchocking.
• When starting on a hill, put the gearselector in
D before releasing the park-
ing brake.
• If you use the manual (Geartronic) shiftpositions while towing a trailer, makesure the gear you select does not puttoo much strain on the engine (usingtoo high a gear).
• The drawbar assembly/trailer hitchmay be rated for trailers heavier thanthe vehicle is designed to tow. Pleaseadhere to Volvo's recommended trailerweights.
• Avoid driving with a trailer on inclinesof more than 15%.
Trailer cableAn adapter is required if the vehicle's trailer hitch has a 13-pin connector and the trailerhas 7 pins. Use an adapter cable approvedby Volvo. Make sure the cable does not dragon the ground.
Trailer Stability Assist (TSA)
Trailer Stability Assist is a system designed to help stabilize a vehicle that is towing a trailerwhen the vehicle and trailer have begun tosway and is part of the Dynamic Stability andTraction Control system (DSTC). See page144 for information on DSTC.
FunctionA vehicle towing a trailer may begin to swayfor various reasons. Normally this only occursat high speeds but, for example, if the traileris overloaded or if the load is unevenly dis-tributed in the trailer, there is risk of swayingat speeds between approximately 45-55 mph(70-90 km/h). Swaying may be caused by factors such as: •
The vehicle and trailer are hit by a sud- den, strong crosswind
• The vehicle and trailer are traveling on anuneven road surface or drive over a bump
• Sudden movements of the steering wheel
Facts about TSA
• TSA intervenes at speeds above approxi-mately 40 mph (60 km/h)
• The DSTC symbol (
) in the instru-
ment panel will flash when TSA is working
• If the driver switches off the DSTC sys- tem's Spin Control function, TSA will also be switched off (but will be on again thenext time the engine is started)
• TSA may not intervene when the vehicleand trailer begin to sway if the driver triesto compensate for the swaying motion bymoving the steering wheel rapidly
How TSA worksOnce swaying has begun, it can be very diffi- cult to stop, which makes it difficult to controlthe vehicle and trailer. The TSA system continuously monitors the vehicle's movements, particularly lateralmovement. If the system detects a tendencyto sway, the brakes are applied individuallyon the front wheels, which has a stabilizingeffect on the vehicle and trailer. This is oftenenough to enable the driver to regain controlof the vehicle. If this is not adequate to stop the swaying motion, the brakes are applied to all of thewheels on the vehicle and on the trailer if it isequipped with brakes, and engine power istemporarily reduced. As the swaying motionbegins to decrease and the vehicle-trailerhave once again become stable, TSA will nowstop regulating the brakes/engine power andthe driver regains control of the vehicle.

08 Wheels and tires
Uniform Tire Quality Grading
08
306
Quality grading information
ALL PASSENGER VEHICLE TIRES MUST CONFORM TO FEDERAL SAFETYREQUIREMENTS IN ADDITION TO THESEGRADES Quality grades can be found, where appli- cable, on the tire sidewall between thetread shoulder and maximum sectionwidth. For example: Treadwear 200 Traction AA Temperature A
TREADWEARThe treadwear grade is a comparative rating based on the wear rate of the tire when tes-ted under controlled conditions on a specifiedgovernment test course. For example, a tiregraded 150 would wear one and one half(1 1/2) times as well on the governmentcourse as a tire graded 100. The relative per-formance of tires depends upon the actualconditions of their use, however, and manydepart significantly from the norm due to var-iation in driving habits, maintenance practicesand differences in road characteristics andclimate.
TRACTIONThe traction grades, from highest to lowest,are AA, A, B, and C, as measured under con-trolled conditions on specified governmenttest surfaces of asphalt and concrete. A tiremarked C may have poor traction perform-ance. The traction grade assigned to this tireis based on braking (straight-ahead) tractiontests and is not a measure of cornering (turn-ing) traction.
WARNING
The traction grade assigned to this tire is based on braking (straight-ahead) tractiontests and is not a measure of cornering(turning) traction.
TEMPERATUREThe temperature grades are A (the highest), B, and C, representing the tire's resistance tothe generation of heat and its ability to dissi-pate heat when tested under controlled con-ditions on a specified indoor laboratory testwheel. Sustained high temperature can causethe material of the tire to degenerate andreduce tire life, and excessive temperaturecan lead to sudden tire failure. The grade Ccorresponds to a minimum level of perform-ance that all passenger vehicle tires mustmeet under the Federal Motor Safety Stand-ard No. 109. Grades B and A represent higherlevels of performance on the laboratory testwheel than the minimum required by law.
WARNING
The temperature grade for this tire is established for a tire that is properly infla-ted and not overloaded. Excessive speed,under-inflation, or excessive loading, eitherseparately or in combination, can causeheat buildup and tire failure.

11 Index
11
381
fluid..................................................... 373
general information............................. 135
Bulbs headlights........................... 334, 335, 336
introduction......................................... 334
license plate lights.............................. 338
side marker lights............................... 337
specifications...................................... 339
trunk lighting....................................... 339
C
Camera, Park Assist................................ 189
Capacity weight....................................... 304
Catalytic converter................................... 282
Cell phone, hands-free connection......... 261
Cell phone voice control.......................... 270
Central locking system, introduction......... 54
Chains...................................................... 307
Check Engine warning light....................... 78Child restraintsrecalls and registration......................... 39
Child restraint systems.............................. 40 booster cushions.................................. 47
convertible seats.................................. 44 infant seats........................................... 42
ISOFIX/LATCH anchors........................ 48
top tether anchors................................ 50
Child safety................................................ 37 booster cushions.................................. 47
child restraint systems.......................... 40
convertible seats.................................. 44
infant seats........................................... 42
Child safety locks...................................... 51
City safety................................................ 164
Climate system........................................ 213 air distribution............................. 208, 216
air vents.............................................. 209
Interior Air Quality System.................. 208
introduction......................................... 207
passenger compartment filter............ 208
refrigerant........................................... 207
Clock, setting............................................. 82
Cold weather driving................................ 278
Collision warning system................. 170, 171
Compass in rearview mirror..................... 109
Conserving electrical current................... 277
Controls, center console.......................... 233
Convertible seats....................................... 44
Coolant............................................ 332, 373 Cooling system, general information....... 277
Courtesy lighting................................ 99, 100
Crash event data......................................... 9
Crash mode............................................... 35
Cruise control.................................. 148, 149
adaptive.............................................. 150
Curb weight............................................. 304
Current, conserving................................. 277
Cyclist detection...................................... 170D
Daytime running lights............................... 94
Defroster.................................................. 213
Detachable key blade.......................... 60, 63Disconnecting the front passenger’s air-
bag....................................................... 26, 27
Distance Alert.......................................... 161
Dome lighting..................................... 99, 100
Door mirrors............................................. 106
Driver alert............................................... 180 Lane Departure Warning..................... 182
Driver distraction warning.......................... 13

11 Index
11
387
rotation............................................... 294
Self-supporting run flat tires (SST)..... 320
snow................................................... 307
spare................................................... 308
specifications...................................... 298
speed ratings...................................... 298
storing................................................. 296
studded............................................... 307
tire pressure monitoring system......... 318
tire sealing system.............................. 309
tread wear indicator............................ 295
uniform tire quality grading................. 306
Tire sealing system.................................. 309 Top tether anchors (child restraint sys-
tems).......................................................... 50
Touching up paint.................................... 361
Towing a trailer................................ 287, 288
Towing the vehicle................................... 289
Traction control........................................ 144
Trailer towing................................... 287, 288Transmission general description..................... 121, 122
Hill Start Assist................................... 121
oil........................................................ 373
shiftlock override................................ 124
Tread wear indicator................................ 295 Trip computer.......................................... 217
Trip odometers.......................................... 82
Trips, long distance................................. 277Trunk
changing bulbs................................... 339
driving with it open............................. 276
Tunnel detection........................................ 97
Turn signals............................................... 99 changing bulbs................................... 337
indicator lights...................................... 79
U
Uniform Tire Quality Grading................... 306
Unlocking the vehicle.......................... 57, 67
Upholstery care....................................... 359
V
Valet locking.............................................. 63
Vanity mirror............................................ 227 changing bulbs................................... 339
Vehicle Event Data....................................... 9 Vehicle loading................................ 284, 304
roof loads............................................ 286
Vehicle maintenance................................ 324 performed by the owner..................... 325
Vehicle weights........................................ 369
Ventilated seats....................................... 210Voice control cell phones......................................... 270
Volvo and the environment........................ 12
Volvo maintenance.................................. 324
Volvo On Call Roadside Assistance........ 378
Volvo programs....................................... 378
Volvo Sensus........................................... 198
W
Warning flashers, hazard........................... 99
Warning lights................................ 75, 77, 79
Warning symbol......................................... 81
Warning system, collision................ 170, 171
Warranties................................................ 324
Washer fluid..................................... 342, 373