snow chains VOLVO XC90 2006 Owners Manual

124 StartinganddrivingStabilitysystemWhenthestabilitysystemisinaction,itmay
seemlikethecardoesnotrespondnormally
toacceleration.Thisisbecausethesystem
detectstheamountoffrictionontheroad
surfaceandallowsthedifferentstability
systemfunctionstooperate.
ThecariseitherequippedwithSTC(Stability
andTractionControl)-Stabilityandtraction
controlsystemorDSTC(DynamicStability
andTractionControl)-Dynamicstabilityand
tractioncontrolsystem.
TractionControl–(TC)
TheTractionControlfunctiontransfers
powerfromthespinningdrivewheeltothe
drivewheelwhichhasgripbybrakingthe
spinningdrivewheel.Toincreaseforward
tractioninthissituation,itmaybenecessary
todepresstheacceleratormorethanusual.A
pulsingsoundisheardwhenTractionControl
isworking.Thisiscompletelynormal.TheTC
functionismostactiveatlowspeeds.It
cannotbedeactivated.SpinControl(SC)
TheStabilityControlfunctionpreventsthe
drivewheelsfromslippingduringacceler-
ation.Thisimprovesroadsafetyonslippery
surfaces.Undercertainconditions,suchas
whendrivingwithsnowchainsorindeep
snoworsand,itmaybebeneficialto
deactivatetheSCfunctiontoincrease
traction.ThisisdonewiththeSTC/DSTC
button.
ActiveYawControl(AYC)
TheActiveYawControlfunctionautomati-
callybrakesoneormorewheelstostabilise
thecarintheeventofaskid.Ifthebrake
pedalweretobedepressedinthissituation,
itwouldfeelmorerigidthanusualanda
pulsingsoundwouldbeheard.
TheAYCfunctionisalwaysactiveandcannot
bedeactivated. Function/
systemSTCDSTC
1
1.Optiononcertainmarkets.TCXX
SCXX
AYCX
WARNING!
SuppressingtheSTCorDSTCsystem
mayalterthedrivingcharacteristicsofthe
car.Alwaystakecarewhencorneringand
drivinginslipperyconditions.
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149 Wheelsandtyres
GeneralTyreswithtreadwearindicatorsTreadwearindicatorsarenarrowtreadless
bandsacrossthewidthofthetread.Onthe
sideofthetyrearethelettersTWI(tread
wearindicator).Whenonly1.6mmoftread
remains,thisbandisclearlyvisible.Change
thetyresassoonaspossible.Rememberthat
tyreswithlittletreaddepthprovideverypoor
gripinrainandsnow.WintertyresVolvorecommendswintertyreswith
particulardimensions.Thesearestatedon
thetyrepressurelabel,seepage151forits
location.Thetyredimensionsaredependentontheenginevariant.Whendrivingonwinter
tyres,thesemustbefittedtoallfourwheels.
NOTE!AskaVolvodealerwhichrimandtyre
typesaremostsuitable.
StuddedtyresStuddedwintertyresshouldberuningently
for500-1000kmsothestudssettleproperly
intothetyre.Thisgivesthetyre,and
especiallythestuds,alongerlifespan.
NOTE!Thelegalprovisionsfortheuseof
studdedtyresvaryfromcountrytocountry.
Treaddepth
Roadconditionswithice,slushandlow
temperaturesplaceconsiderablyhigher
demandsontyresthansummerconditions.It
isthereforenotrecommendedtodriveon
wintertyresthathaveatreaddepthofless
thanfourmillimetres.
Snowchains
Snowchainsmayonlybeusedonthefront
wheels.Thisalsoappliestoall-wheel-drive
cars.
Neverdrivefasterthan50km/hwithsnow
chains.Avoiddrivingonbaregroundasthis
wearsoutboththesnowchainsandtyres.
Neverusequick-fitsnowchainsasthespace
betweenthebrakedisksandthewheelsis
toosmall.
IMPORTANT!UseVolvogenuinesnowchainsorequiv-
alentchainsdesignedforthecarmodel,
andtyreandrimdimensions.Consultan
authorisedVolvoworkshop.
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