Volvo VN - Traction Control Shut-Off Switch; Suspension Dump Switch

82INSTRUMENTSANDCONTROLS
19.TractionControlShut-OffSwitch(TCS)
IfthevehicleisequippedwithaTractionControlSystem(TCS),theswitchcanbe
usedtodisablethetractioncontrolfeature,andthereforeincreasewheelspin.This
maybeusefulfordecreasingthechancesofgettingboggeddownwhendrivingin
heavysnow,slushormuddyconditions.RefertoV olvoExhaustBrakeformore
information.
W3001336
TractionControlSwitch
20.SuspensionDumpSwitch
Vehicleswithrearairsuspensionhaveacontrolfordeatingtheairsprings.Usethis
featurewhenuncouplingfromtrailers.See“FIFTHWHEELINSTRUCTIONS”,
page313forcorrectoperationwhenuncoupling.
W3001341
SuspensionDumpSwitch
CAUTION
Thevehiclemustneverbedrivenwith
theairspringsdeated.Damagetoair
suspensionpartswilloccurifsprings
arenotinatedproperly.
Thesuspensiondumpswitchhasasafetylatchtopreventaccidentalengagement.
Depressthelatchandpressinthebottompartoftheswitchtodeatetheairsprings.
Atell-taleintheinstrumentclusterwilllightupwhentheswitchisintheONposition.
Thisswitchcontrolsachassis-mountedelectricoverairsolenoidvalve.Whenthe
switchisrockeddowntotheONpositionandtheignitionswitchisturnedtotheOFF
position,thesolenoidvalvewillnolongerhavepowerandthesuspensionwillinate.