Kenworth P30-1011 Service Manual
Section
MultiplexedElectricalSystem
ServiceManual
Number
Date
2012MultiplexedElectricalSystemService
Manual—(P30-1011)
PM819023/KM815057
08/14/2012
©2012PACCARCorporation
CondentialityNotice:Thisdocumentandtheinformationcontainedhereinisproprietary.Itshallnotbe
reproduced,copiedordisclosed,inwholeorinpart,orusedformanufacturewithoutthewrittenpermission
ofPACCAR.Youareherebynotiedthatanydisseminationofthisinformationisstrictlyprohibited.
ii
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TableofContents
Safety.............
AppliesTo...........
ExplodedView.........
What'sNew..........
GeneralInformation
SpecialTools..........
Specications.........
HowItWorks..........
Maintenance..........
Disassembly/Assembly....
Inspection...........
Troubleshooting........
Glossary............
Index.............
1
2
3
4
5
6
7
8
9
10
11
12
13
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ImportantNotes............1-2
Safety
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ImportantNotes
ThesimulatefunctionwithinESAcanprovidea
valuablediagnosistool.Toensuresafeoperation,
certainCECUoutputsarenotaccessiblefor
simulationsuchas:cruisecontrol,engineoil
pressureandtheparkbrakeswitch.
Simulationofgaugesisalsonotpermittedifthe
engineisrunning.
ReplacingtheCECUresultsintheodometer
beingreset.T akeappropriateactiontorecordthe
vehiclemilespriortoremovingtheCECU.
CAUTION
Interruptingthecommunicationorpowersupply
duringacontrolunitreashcouldresultin
hardwaredamage.
ESArecognizeswhenasoftwareupdateis
requiredonaconnectedvehicle.Ifforsome
reasontheuserchoosesnottoreashthecontrol
unit,ESAtriggersawarningdisplay.TheLCD
backlightingofthespeedometerandoutsideair
temperatureblinkfor1minute.Thewarningis
triggeredateverykey-onofthevehicleuntilthe
requiredupdateisperformedtoalerttheoperator
orothertechniciansthatavehiclereashis
required.
ESAautomaticallyidentiestheversionofCECU
hardwarewhenconnected,andonlypermits
softwaredownloadsthatareapplicableforthat
controlunit.Softwareversionsarenotbackwards
compatible;avehicleisrenderedinoperativeif
aCECUwithoutthecorrectsoftwareversionis
installed.
InstrumentationServiceInformationdescribing
howtoremove,disassemble,andreinstall
instrumentationcomponentsislocated
onServiceNet.Beforeattemptingany
instrumentationrepairs,thetechnicianshould
haveacompleteunderstandingoftheprocedures
describedinServiceNet.
Thismanualcontainsservicemanualinformation
coveringvehiclesequippedwithsoftwareversion
"CECU3withChassisNode"(P30-1011).For
vehicleswithpriorCECUsoftwareversions(such
as:"CECU3withChassisNode"(P30-1009),
CECU3(P30-1008),ICU(P30-1003),and
CECU/CECU2(P30-1002))refertoearlier
publications.
Whenreplacingachassisnode,disconnect
thebatteriesanddonotreconnectthemuntil
nodeinstallationandallwiringconnectionsare
complete.AnewchassisnodeandtheCECU
needtobepoweredupsimultaneouslyduring
thenode'srstpowercycle;otherwiseafault
codemessagewillappearinthemaininstrument
clusterbetweenthespeedometerandtachometer.
ThismessageindicatesthattheCECUisnot
recognizingthepropercommunicationwiththe
chassisnode.
NAMUX4incorporatessoftwareintheCECU
alongwithsoftwareintheinstrumentcluster.
Thesesoftwareversionswilloftenbelinked
togetherwhichwillrequirebothunitstoget
updatedshouldtheothergetupdated.ESAwill
prompttheuserifsucharequirementisneeded.
ChecktheprogrammenuwithinESAtoseeif
aninoperativefeatureisdisabled.Thisisvery
importantwhendiagnosinganinoperativephysical
gaugeonaCECUequippedvehicle.Thegauge
mayhavebeenpreviouslydisabled.
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MultiplexingOverview.........2-2
Models–BuildDates..........2-2
AppliesTo
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MultiplexedElectricalSystemServiceManual
MultiplexingOverview
Thismanualprovidesserviceinformation
coveringtrucksequippedwiththemultiplexed
instrumentationsystem.Beforeattemptingto
makeservicerepairs,thetechnicianshould
beknowledgeableaboutthesystemdesign,
components,operationandtroubleshooting
proceduresfordiagnosingmultiplexed
instrumentationproblems.
Howcommunicationworksinamultiplexsystem:
Eachmajorsubsysteminthetruck’selectrical
systemisoperatedbyacontrolmodulethatsends
andreceivesdatatoandfromacentralhub
computer.Thecentralhubcomputeriscalledthe
CECU(CabElectronicControlUnit).Sincewe’re
intothethirdgenerationnow,wesometimescall
itCECU3.
TheCECUreceivesdatarelatedtocontrollingthe
variousdevicesoftheelectricalsystem.Itthen
makesdecisionsbasedonthatinputandsends
informationtoeachofthesubsystemsystem
controlmodules(nodes)aboutwhatthatnode
shoulddowiththecomponentsitcontrols.
Models–BuildDates
Identifyingwhichcontrolunitisinthevehiclehelps
determinewhatfeaturesarepresentandalsoaids
introubleshooting.
Thisnewgenerationincorporatesmuchofthe
samearchitecturefrompreviousdesignswith
addeddatacommunicationswithmorecontrol
modules.Thesoftwarehasbeenupgradedto
incorporateinterlockstoensuresafety,maximize
vehicleperformanceandsimplifydriverinteraction.
Control
Unit
ICUQ21-1029-X-XXXP30-1003-XXXPB:357,378,379,385,386
CECU/CECU2Q21-1055-X-XXX/
CECU3Q21-1076-X-XXXP30-1008-XXXPB:325,330,337,348,387
ChassisNode
CECU3with
ChassisNode
HardwarePartNumberSoftwareVersionModels
KW:C500,T600,T800,W900,
Off-Highway
PB:365,367,384,386,388,389
KW:C500,T440/T470,T660,
T800,W900,Off-Highway
PB:387
KW:T2000
PB:325,330,335,340
KW:T170,T270,T370,T700
PB:365,367,384,386,388,389
KW:C500,T440/T470,T660,
T800,W900,Off-Highway
PB:365,367,384,386
KW:T660,T800
KW:T680
Q21-1075-X-XXX
Q21-1076-X-XXXwith
Q21-1077-X-XXX
Q21-1076-X-XXXwith
Q21-1077-X-XXX
P30-1002-XXX
P30-1009-XXX
P30-1011-XXXPB:579
EngineEmissions
Level
1998,20042005-2006
2007
20102010-present
20102010-present CECU3with
20102010-201 1
20102011-present
ProductionBuilt
Dates
2007-2009
2008-2009
2009
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ControlUnitIdentication
Controlunitidenticationcanbemadeusinga
fewmethods:
•SearchingusingtheElectronicCatalog(ECA T)
•ConnectingusingtheElectronicService
Analyst(ESA)
•MenuControlSwitch(MCS)oftheinformation
display
UsingECATorESAaretheeasiestandmost
exactwaysofdeterminingthetypeofcontrolunit
inthetruck.
ElectronicCatalog(ECAT)Identication
ECATprovidesapartslist“asbuilt”andBillof
Materialsinformationforeachspecictruck.
Thecatalogissearchable,andcontainsthepart
numberandidenticationofthetrucksinstrument
panelcontrolunit.
•ICUPartNumberQ21-1029-X-XXX
•CECUPartNumberQ21-1055-X-XXX
LineitemtenofthisControlUnitInformation
windowdisplaysthecurrentVehicleSoftware
Version.ThisdetailsthecurrentCECUsoftware
andprogrammingdatethatispresentlyinstalled
onthevehicle.
Uponconnection,ESArecognizesifasoftware
updatehasbeenissuedforthecontrolunitwithin
theconnectedvehicle.Ifanupdateisrequired,
ESApromptsthetechniciantoperformtheupdate
operation.
•CECU2PartNumberQ21-1075-X-XXX
•CECU3PartNumberQ21-1076-X-XXX
•ChassisNodePartNumberQ21-1077-X-XXX
Theblankdigits(denotedby"X")intheabovepart
numbersrepresent:
•"-X"isthehardwarerevision.
•"-XXX"isthesoftwarebootloaderversion.
ElectronicServiceAnalyst(ESA)Identication
ConnectingusingESAbringsupacontrolunit
informationwindow.Inthiswindow,thesixth
lineitemistheControlUnitTypeandidenties
whetherthetruckhasanICUorCECU.Italso
detailsthevariantoftheCECU.
MCSIdentication
Forvehiclesequippedwiththeinformationdisplay ,
controlunitidenticationispossibleviatheMenu
ControlSwitch(MCS).UsingtheMCSknob,
selectthe"TruckInformation"menu.Usethis
menutolookupthe"CECUSWVer."Software
versionP30-1002-XXXcandenoteeitheraCECU
orCECU2.
•ICUSoftwareP30-1003-XXX
•CECUSoftwareP30-1002-XXX
•CECU2SoftwareP30-1002-XXX
•CECU3SoftwareP30-1008-XXX
•CECU3withChassisNodeSoftware
P30-1009-XXX
•CECU3withChassisNodeSoftware
P30-1011-XXX
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ControlUnitLocation.........3-2
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ControlUnitLocation
CECULocations
Theheartofthemultiplexedinstrumentation
systemistheCECU.Theunitislocatedinthe
centerofthedash,beneaththecupholders.
TypicalCECULocations(Kenworth)
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1.AMOTmodule
2.AllisonTransmission
3.CabECU
4.ABSECU
TypicalCECULocations(Peterbilt)
1.AMOTmodule
2.AllisonTransmission
5.ELSAmplier
6.DriverDoorController
7.PassengerDoorController
3.CabECU
4.ABSECU
5.ELSAmplier
6.DriverDoorController
7.PassengerDoorController
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ChassisNodeLocations
Thechassisnodeislocatedbelowthedriverside
door.
TypicalChassisNodeLocation
3
1.ChassisNode
NOTE
ChassisNodesandconnectorsarepaintedover
withframepaint.Toreleasetheconnectors,it
willbenecessarytoscrapeawaythepaintto
accessandreleasetheconnectorlockinglever.
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SoftwareP30-1011Features......4-2
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SoftwareP30-1011Features
NOTE
Softwareversionsarenotbackwards
compatible;thismanualcontainsservice
manualinformationcoveringvehicles
equippedwithsoftwareversion"CECU3with
ChassisNode"(P30-101 1).Forvehicles
withpriorCECUsoftwareversions(suchas:
"CECU3withChassisNode"(P30-1009),
CECU3(P30-1008),ICU(P30-1003),and
CECU/CECU2(P30-1002))refertoearlier
publications.Avehicleisrenderedinoperative
ifaCECUwithoutthecorrectsoftwareversion
isinstalled.
ThemostnotablechangetoNAMUXisthefactory
programmedinterlocks.Interlocksaredened
asparametersthatmustbevalidatedbeforea
functionwillengage.Forexample,thesystemwill
notallowthevehicletomoveiftheparkbrake
switchhasnotbeende-activated.
TheMenuControlSwitch(MCS)nowhasthe
'back'functionasadedicatedbuttononthemenu
controlswitchonthedash.Itisnotamenu
selectionintheprogram.
P30-1011featuresfewerhardwiredcircuitsand
morecommunicationsovertheCANnetworks.
Thefaultmessagingcapabilitieshaveimproved
withthisnewrelease.Theinformationtothedriver
ismorecompleteandcanprovidethedriverwith
generalactionitemsforeachwarningicon.
Theprogramitselfhasimprovedcapabilitieswith
regardtotripinformation.Thereare4individual
tripodometersthattheusercancustomizetot
theirneeds.
Ifthereisadatacommunicationfailure
betweentheCECUandInstrumentClusterthe
ClusterDisplaywillshowamessageindicating
communicationfailure.Thisisintendedtoalertthe
driverthattheInstrumentClusterisnotdisplaying
thegaugesaccuratelyanditindicatesaphysical
failureontheI-CAN.
NewSystems
Briefoverviewofsomeofthenewlyintroduced
systemsofthelatestsoftwareversion.
SteeringWheelControls(cruiseandradio)
Themultiplexedsteeringwheelisacarry-over
designfromotherPACCARmarkets.It
communicatesontheC-CANlineforaudioand
cruisecontrolinputsfromtheoperator.
Radio
TheradioisnowontheC-CANdatabus.
VirtualGauges/Navigation/TelematicsUnit
(optional)
Thisunitprovidesvehicleinformationtothe
operatorandreceivestheinformationfromthe
V-CAN.Thedisplayprovidesrealtimeinformation
intheformofgauges.Itisalsoconnectedtothe
C-CANforaudiooutput.
RearSleeperRadioControls(optional)
Therearsleeperaudiocontrolscommunicates
signalsfromthecontrolpanelinthesleeperto
allowtheoccupanttocontroltheaudiofromthe
sleeper.
HVAC
Allairconditioninginputsarecommunicatedtothe
controllerthroughtheC-CAN.InputfortheHVAC
systemmaycomefromsensorsusedbythe
enginecomputerorcabcomputer.Forexample,
theoutsideairtemperaturesensorismountedto
themirrorandthesignalmustbesentthroughthe
doorcontrolmoduleandthecabcontrolmodule
beforebeingreceivedbytheHV ACcontroller.
ElectricOverAirSwitches
ElectricOverAir(EOA)switchesinitiateelectrical
signalstoactuateairvalvesinordertoactivate
anddeactivateairfunctions(suchas:suspension
dumps,differentiallocks,PTOswitches,trailer
switches,etc.).
4-2
ThereareatotalofeightavailableEOAgeneral
functionswitcheswithfouradditionalhardwired
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lifter/pusheraxleswitches.Theeightgeneral
switchesareinputsintotheCECUwhilethefour
hardwiredswitchesarewireddirectlytotheair
solenoidswithnosoftwareinterlocksorCECU
control.
FordetailedinformationontheEOAinterlocks
refertoElectricOverAirSwitchInterlocksonpage
8-11inthe"HowItWorks"sectionofthismanual.
ExteriorLightingSelfTest
TheExteriorLightingSelfT est(ELST)isintended
tobeoperatoractivatedandusedtoenhancethe
vehiclepre-driveinspection.
Wheninitiated,theELSTtogglesbetweentwo
exteriorlightingsequences.TheELSTteststhe
functionalityofcertainexteriorlights.
TheELSTcanbeactivatedfromadashswitch
thatisaccessiblefromoutsidethecaborbythe
optionalremotekeylesskeyfobtransmitter.
4
CabDimmer
Thecabdimmerswitchisamomentaryup/down
dashswitchthatallowstheusertoraiseorlower
thedashbacklightingilluminationlevels.
Thevehiclehasadaytimebrightnesssettingthat
isindependentofthenighttimebrightnesssetting.
DoorControls
TheDoorControlSystem(DCS)operateswith
CECUelectricalarchitecturetoenabletheuserto
raise/lowerthedoorwindows,lock/unlockdoor
locks,adjustmirrorposition,andactivatemirror
heat.
BodyCAN
Thereisadedicatedcommunicationline(B-CAN)
forcustomerinstalledcontrolunits.Thisdataline
maybeusedbybodybuilderstoaddlikeprotocol
controlunits.Formoreinformationregardingthe
B-CAN,refertotheappropriateBodyBuilder
Manual.
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ServiceResources..........5-2
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ServiceResources
DisabledGauges
WiththeCECU,disablingacomponent
turnsthecomponentoffcompletely.The
disabledcomponentisremovedfromallsignal
transmissionsinordertoallowtheotherfeatures
onthevehiclefastercommunication.Adisabled
gaugewillnotfunctionorcommunicatewiththe
controlunit.
NOTE
Checktheprogrammenutoseeifaninoperative
featureisdisabled.Thisisveryimportantwhen
diagnosinganinoperativegaugeonaCECU
equippedvehicle.Thegaugemayhavebeen
previouslydisabled.
Whenaservicetechnicianinstallsanoptional
gaugeinthemultiplexedinstrumentationsystem,
thenewlyinstalledgaugewillinitiallybedisabled.
Becausethegaugeisnotfactory-installed,the
technicianmustprogramtheCECUtomonitorit.
UntiltheCECUisprogrammed,thelinkbetween
theCECUandthegaugeistermed“disabled”–
thatis,theCECUispreventedfromdetecting
errors,andalsofromlogginganddisplaying
diagnostictroublecodes(DTCs).
ToprogramtheCECUandenablegauges,select
“Program”.Ifthegaugevalueis“Disable”,change
itto“Enable”.
OncetheCECUisprogrammedandthelinkto
thegaugeis“enabled”,theCECUmonitorsit,
diagnoseserrorslike“shorts”and“opens”,logs
DTCsfortroubleshooting,anddisplaystheDTCs
onESA’s“Diagnose”screen.
CommunicationDiagram
Communicationdiagramsillustratethesignal
transmissionsbetweencomponents(switches,
sensors,controlunits,CANlines,etc.)necessary
toperformsystemfunctions.
ControllerAreaNetwork(CAN)Communication
Thefollowingdiagramprovidesanexampleofthe
communicationlinesandsignalpathsofatypical
multiplexedvehicle.Determiningthecorrect
communicationlinesthatprovideasignaltothe
CECUandwherethesecircuitsinterconnect,
helppinpointpossibletroubleareas.Sometimes
theseconnectionsbecomeloose,havebentor
misalignedpins,andvisuallyinspectingthemmay
helpidentifywhyotherelectricalproblemsmay
beoccurring.
NetworkDescriptionWhat’sontheNetwork
V-CANVehicle
powertrain
D-CANDiagnosticDiagnosticconnector
F-CANFrame
components
I-CANInstrumentsInstrumentcluster
C-CANCab
B-CANBodyBuilderAftermarketdevices²
E-CANEngineInput
A-CAN³Aftertreatment
¹NotalltelematicsunitswillberecognizedbytheCECUarchitecture.
²TelematicunitsconnectedtotheBCANwillnotberecognized
bytheCECU.AnydevicesplicedintoaCANwirewillnotbe
recognizedbytheCECUarchitecture.
³ForvehiclesbuiltwithPACCARMXengine.
Transmission
Engine
ABS
telematics(optional)¹
ChassisNode
PACCARDisplayorRadio
Doorcontrollers
HVAC
RemoteSleeperAudio(optional)
Multifunctionsteeringwheel(optional)
Turbo
HumiditySensor
EGR
NOxsensors
DoserControlUnit
Aftertreatmentcontrolunit
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CANCommunicationInterfaceDiagram
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CECUDetails
Theheartofthemultiplexedinstrumentation
systemistheCECU.SeeControlUnitLocations
onpage3-2forillustrationsdepictingthephysical
positionofthecontrolunit.
TheCECUreceivesdatarelatedtocontrollingthe
variousdevicesoftheelectricalsystem.Itthen
makesdecisionsbasedonthatinputandsends
informationtosubsystemsystemcontrolmodules
(nodes)aboutwhatthatnodeshoulddowiththe
componentsitcontrols.
CECU
CECUConnectorIdentication
Thereare5electricalconnectorsthatpluginto
theCECU.
•ConnectorA-9pins
•ConnectorB-24pins
•ConnectorC-52pins
•ConnectorD-40pins
•ConnectorE-9pins
ForanillustrationofthesideviewofaCECU
showingwheretheharnessconnectorsattachinto
thecontrolunit,seeCECUFigure.Thisgure
identiesconnectorpositiononthecontrolunitas
wellasindividualconnectorpinlocations.
Forconnectorfaceviewsattheharness
connectorsthatplugintotheCECU,seeCECU
ConnectorFaceViewsFigure.Theseconnectors
CECUConnectorFaceViews
allbranchfromtheinstrumentpanelharnessthat
routesbehindthedash.
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CECUComparisonChart-(Pinout)
ConnPinNumberCircuitFunction
A
B
1CVSGpower
2Power-battery
3Cabdomelampoutput
4Menucontrolswitchpower
5Ground
6Menucontrolswitchground
7Dash/panelillumination
8Auxiliarybacklighting
9Power-battery
1MenucontrolswitchencodeA
2MenucontrolswitchencodeB
3Menucontrolswitchenter
4Exteriorlightingselftestinput
5Ignitioninput(Start)
6Domelampinput
7Seatbelttelltale
8Cruiseset
9Cruiseresume
10Back-upalarmmute
11Retarderselect1
12Retarderselect2
13Clutchswitch
14Headlampsactive
15PTOset
16PTOresume
17Enginefanoverride
18Regenenable
19Inhibitregen
20ABSoffroad
21Markerlamp(Tractor)
22L VDinput
23TransferCaseEngaged
24Reserve-passengerseatoccupancysensor
ConnPinNumberCircuitFunction
C
1Powersupply+5Vsensors
2Analogreturn
3Electricoverairswitch1input
4Notused
5Spareanaloginput
6Airpressuretransducer-primary
7Airpressuretransducer-secondary
8Airpressuretransducer-application
9GaugeSensor1
10Airlterrestriction
11GaugeSensor2
12Dimmerswitch(up)
13Dimmerswitch(down)
14CVSGdata
15CVSGreturn
16Outsideairtemperature(Pre-2010engines
only)
17Electricoverairswitch3input
18Electricoverairswitch4input
19Electricoverairswitch5input
20Electricoverairswitch6input
21Transmissionoiltemperature-main
22Electricoverairswitch7input
23Pyrometer(Pre-2007enginesonly)
24Electricoverairswitch8input
25Analogreturn
26Electricoverairswitch2input
27Spare
28Spare
29Spare
30GaugeSensor3
31Wiperresistorladder
32Turnsignalresistorladder
33L VDbatteryvoltage
34GaugeSensor4
35C-CANground
36Notused
37C-CANhigh
38C-CANlow
39Trailerstoplamprelay
40D-CANhigh
41D-CANlow
42D-CANground
43B-CANhigh
44B-CANlow
45B-CANground
46Markerash
47Windshieldwasherpump
48DRLinterrupt
49Markerlamp(Trailer)(Kenworth)
50FuelLevelSenderSelect
51Headlampash
52Headlamphigh/low
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ConnPinNumberCircuitFunction
D
E
1Power-ignition
2Generalpurposewakeup
3Power-accessory
4Hazard
5Brakeswitch
6Sparedigitalinput
7Parkbrakeactive
8Foglamps(1stset)
9MCSbackswitch
10Cruiseon/off
11Interaxlelocktelltale
12Parklamp(Kenworth)
13TractorABStelltale
14TrailerABStelltale
15Checkenginetelltale
16Stopenginetelltale
17Windshieldwiper(fast)
18Secondaryfoglamps
19Editabletelltale1
20Editabletelltale2
21Editabletelltale3
22Spare
23Editabletelltale5
24Editabletelltale6
25Editabletelltale7
26Spare
27Spare
28Dashbuzzer1A
29Dashbuzzer1B
30Dashbuzzer1C
31Dashbuzzer2
32F-CANhigh
33F-CANlow
34I-CANhigh
35I-CANlow
36I-CANground
37V-CANhigh
38V-CANlow
39V-CANground
40V-CANlowterminated
1Idletimerrelay
2Windshieldwiperrelay
3Ignitionrelay(Start)
4Cabmarker/clearancelamprelay
5Ground
6LVDBus1
7Parklamprelay
8Trailermarker/clearancelamprelay
9Mirrorheatrelay
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ChassisNodeDetails
Thenodethatreceivesinformationfromthe
CECUtocontrolexteriorlighting,Electricover
Aircontrols,andwindshieldwipersiscalledthe
chassisnode.Thechassisnodeservesasa
bidirectionalconduitforbothinformationand
control.
ChassisNodeFigure
ChassisNodeConnectorIdentication
Therearethree21-pinelectricalconnectorsthat
plugintotheChassisNode.
•ConnectorA-21pins
•ConnectorB-21pins
•ConnectorC-21pins
ForanillustrationofthesideviewofaChassis
Nodeshowingwheretheharnessconnectors
attachintothecontrolunit,seeChassisNode
Figure.Thisgureidentiesconnectorposition
onthecontrolunitaswellasindividualconnector
pinlocations.
Forconnectorfaceviewsattheharness
connectorsthatplugintotheChassisNode,see
ChassisNodeConnectorFaceViewsFigure.
ChassisNodeConnectorFaceViews
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ChassisNodeComparisonChart-(Pinout)
ConnPinNumberCircuitFunction
A
B
1Leftheadlamplowbeamoutput(PWM)
2Power-ignitioninput
3Ground
4Batterypower-1
5Neutralswitchinput
6Fuellevel1input
7Rightheadlamphighbeamoutput
8Backupswitchinput
9Fuellevel2input
10Reverseloads(Peterbilt)
Snowplow(Kenworth)
11Sparedigitalinput
12Spareanaloginput
13Leftheadlamphighbeamoutput
14(reserved)
15Spareanaloginput
16Batterypower-2
17(reserved)
18F-CANhigh
19Rightheadlamplowbeamoutput(PWM)
20(reserved)
21F-CANlow
1Batterypower-3
2Rightturn/stoprearoutput(Tractor)
3Powersupply+5Vsensors
4Leftturnfront/sideoutput
5Fuellterrestrictioninput
6Transmissionoiltemperature-auxiliaryinput
7Rightturnfront/sideoutput
8Spareanaloginput
9Generaloiltemperatureinput
10Batterypower-4
11Spareanaloginput
12Reserveforremoteaccelerator
13Leftturn/stoprearoutput
14Reserveforclutchwearsensor
15Driving/foglampsoutput
16Leftturntraileroutput
17Ammeterinput
18Batterypower-7
19Batterypower-5
20Leftturnfront/DRLoutput
21Rightturnfront/DRLoutput
ConnPinNumberCircuitFunction
C
1Analogreturn
2Electricoverairswitch1output
3Electricoverairswitch2output
4Transfercaseoiltemperatureinput
5Electricoverairswitch3output
6Electricoverairswitch4output
7PTOoiltemperatureinput
8Electricoverairswitch5output
9Electricoverairswitch6output
10Rearaxletemperatureinput
11Electricoverairswitch7output
12Electricoverairswitch8output
13Frontaxletemperatureinput
14DRLheadlamps(Perterbilt)
15Batterypower-8
16Center/steeraxletemperatureinput
17Windshieldwipermotorcontroloutput
18Trailerenginecoolantvalve
19Batterypower-8
20Rightturntraileroutput
21Back-upalarmcontroloutput
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MultiplexedElectricalSystemServiceManual
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7
ParameterPartNumbers........7-2
Specications
PM819023/KM815057(08/14/2012)
7-1
7
MultiplexedElectricalSystemServiceManual
ParameterPartNumbers
ParameterpartnumbersaresearchableinECAT
andallowadealertodeterminewhatparameters
CECUParameters
ParametersareusedtoidentifytotheCECUwhat
featuresarepresentonavehicle.Theparameters
weresetatthefactory.Also,ifaddinganew
featuretoavehicle,thecorrespondingparameter
needstobeprogrammedtotheCECUand
enabled.
canbealteredbyadealertoenable,disable,or
assigncertainfunctionalitytothatfeature.
CECUParameter
PartNumber
Q30-1024-000ABSinstalled01ParametercontrolsDTC'srelatedtoABSsystem.
Q30-1024-001AfterTreatmentRegeneration
Function
Q30-1024-002ATCinstalled01Currentlyhasnoeffectonfunctionality.Parameterwillbeusedtodetermine
Q30-1024-003RetarderRangeMap04Parameterisusedtodenetheenginebrakelevels.
Q30-1024-004ClutchSwitchPresent11Parameterisusedtodetermineiftheclutchswitchisconnectedtothe
Q30-1024-005CruiseControlSetSwitch
AccelorDecel
Q30-1024-006CruiseControlPresent01Parameterisusedtodetermineifcruisecontrolisinstalledandcontrolsthe
Parameter
Description
Min.
Value
Max.
Value
Value0/DisabledmeansABSisnotinstalledandDTC'saredisabled
Value1/EnabledmeansABSisinstalledandDTC'sareenabled.
01Parameterisusedtoallowinformationfromtheenginetoturnonthe
telltalesforthehighexhausttemperature(emissionsystemtemperature)
andregenerationlter.
Value0/DisabledmeansnotallowclustertodisplayDPFandHEST
telltalesoncluster.
Value1/EnabledmeansallowclustertodisplayDPFandHESTtelltaleson
cluster.
thepresenceoftractioncontrol.
Value0/DisabledmeansATCisnotinstalled.
Value1/EnabledmeansATCisinstalled.
Value1meansenginebrakeswitcheshavetwobrakinglevels0%,100%.
Value2meansenginebrakeswitcheshavethreebrakinglevels0%,50%,
100%.
Value3meansenginebrakeswitcheshavefourbrakinglevels0%,33%,
66%,100%.
Value4meansenginebrakeswitcheshavethreebrakinglevels0%,33%,
66%.
CECU.
Value0/Disabledmeansclutchswitchisnotinstalled(ithasanautomatic
transmissionorishardwiredtoengine).
Value1/Enabledmeansclutchswitchisinstalled(ithasamanual
transmissionandiswiredtothecontrolunit).
01Parameterisusedtodenethecruisecontrolset/resumeswitch
functionality.
Value0/Disabledmeanssetswitchisusedforaccelerate,andresume
switchisusedfordecelerate.
Value1/Enabledmeanssetswitchisusedfordecelerate,andresume
switchisusedforaccelerate.
cruisecontrolmessagestotheengine.
Value0/Disabledmeanscruisecontrolswitchesarenotinstalled.
Value1/Enabledmeanscruisecontrolswitchesareinstalled.
Explanation
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CECUParameter
PartNumber
Q30-1024-007ClockAlarmAvailable01Parameterisusedtodetermineifthealarmclockwillbedisplayedonthe
Q30-1024-008ClockAvailable01Parameterisusedtodetermineiftheclockwillbedisplayedonthe
Q30-1024-009DiagnosticsAvailable01Parameterisusedtodetermineifthediagnosticswillbedisplayedonthe
Q30-1024-010IgnitionTimerAvailable01Parameterisusedtodetermineiftheignitiontimerwillbedisplayedonthe
Q30-1024-011LanguagesAvailable01Parameterisusedtodetermineifotherlanguagesareavailableonthe
Q30-1024-012RPMDetailAvailable01ParameterisusedtodetermineiftheRPMinformationwillbedisplayed
Q30-1024-014TripInformationAvailable01Parameterisusedtodetermineifthetripinformationwillbedisplayed
Q30-1024-015TruckInformationAvailable01Parameterisusedtodetermineifthetruckinformationwillbedisplayed
Q30-1024-016HighlineMenusWraparound01Parameterisusedtocontrolthescrollingininformationdisplay .
Q30-1024-017DomeLampControlledBy
Door
Parameter
Description
Min.
Value
Max.
Value
informationdisplay.
Value0/DisabledmeansAlarmClockisnotavailableininformationdisplay .
Value1/EnabledmeansAlarmClockisavailableininformationdisplay
informationdisplay.
Value0/DisabledmeansClockisnotavailableininformationdisplay.
Value1/EnabledmeansClockavailableininformationdisplay
informationdisplay.
Value0/DisabledmeansDiagnosticisnotavailableininformationdisplay.
Value1/EnabledmeansDiagnosticisavailableininformationdisplay
informationdisplay.
Value0/DisabledmeansIgnitionTimerisnotavailableininformation
display.
Value1/EnabledmeansIgnitionTimerisavailableininformationdisplay
informationdisplay.
Value0/DisabledmeansLanguageselectionisnotavailableininformation
display.
Value1/EnabledmeansLanguageselectionisavailableininformation
display
ontheinformationdisplay .
Value0/DisabledmeansRPMinformationisnotavailableininformation
display.
Value1/EnabledmeansRPMinformationisavailableininformationdisplay
ontheinformationdisplay .
Value0/DisabledmeansTripInformationisnotavailableininformation
display.
Value1/EnabledmeansTripInformationisavailableininformationdisplay
ontheinformationdisplay .
Value0/DisabledmeansTruckInformationisnotavailableininformation
display.
Value1/EnabledmeansTruckInformationisavailableininformationdisplay
Value0/Disabledmeansthatthemenuwillstopwhenitreachesthetopor
thebottomofthelistwhenscrolling.
Value1/Enabledmeansthatthemenuwillwraparoundwhenitreaches
thetoporthebottomofthelistwhenscrolling.
01Parameterisusedtodetermineifthedomelampsarecontrolledbythe
(driver/passenger)door.
Value0/Disabledmeansthedoordoesnotcontrolthedomelamps.
Value1/Enabledmeansthedoordoescontrolthedomelamps.
Explanation
PM819023/KM815057(08/14/2012)
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MultiplexedElectricalSystemServiceManual
CECUParameter
PartNumber
Q30-1024-018DomeLampDelayPresent01Parameterisusedtodetermineifthedomelampdelaysturningoffafter
Q30-1024-019DomeLampDimming
Present
Q30-1024-020AirFilterRestrictionGauge
Installed
Q30-1024-022AmmeterGaugeInstalled01Parametercontrolsthefunctionality(outputonCVSGbusandDTC's)of
Q30-1024-023AuxiliaryTransmission
TemperatureGaugeInstalled
Q30-1024-024AxleT emperatureFront
GaugeInstalled
Q30-1024-025AxleT emperatureRear
GaugeInstalled
Q30-1024-026AxleT emperatureCenter
GaugeInstalled
Q30-1024-027BrakeAppliedPressure
GaugeInstalled
Q30-1024-028BrakesaverOilT emperature
GaugeInstalled
Q30-1024-029EngineCoolantT emperature
GaugeInstalled
Parameter
Description
Min.
Value
Max.
Value
thedoorisclosed.
Value0/Disabledmeansthereisnodelaybeforethedomelampturnsoff.
Value1/Enabledmeansthereisadelaybeforethedomelampturnsoff.
01Parameterisusedtodetermineifthedomelampdimsoutslowlyafter
thedoorisclosed.
Value0/Disabledmeansdomelampturnsoffquicklyafterthedooris
closedanddelayifenabled.
Value1/Enabledmeansdomelampdimsoutslowlyafterthedoorisclosed
anddelayifenabled.
01Parametercontrolsthefunctionality(outputonCVSGbusandDTC's)of
theairlterrestrictiongauge.
Value0/DisabledmeansAirFilterRestrictionGaugeisnotinstalled.
Value1/EnabledmeansAirFilterRestrictionGaugeisinstalled.
theammetergauge.
Value0/DisabledmeansAmmeterGaugeisnotinstalled.
Value1/EnabledmeansAmmeterGaugeisinstalled.
01Parametercontrolsthefunctionality(outputonCVSGbusandDTC's)of
theauxiliarytransmissiontemperaturegauge.
Value0/DisabledmeansAuxiliaryTransmissionT emperatureisnot
installed.
Value1/EnabledmeansAuxiliaryTransmissionTemperatureisinstalled.
01Parametercontrolsthefunctionality(outputonCVSGbusandDTC's)of
thefrontaxletemperaturegaugeifinstalled.
Value0/DisabledmeansAxleT emperatureFrontGaugeisnotinstalled.
Value1/EnabledmeansAxleTemperatureFrontGaugeisinstalled.
01Parametercontrolsthefunctionality(outputonCVSGbusandDTC's)of
therearaxletemperaturegauge.
Value0/DisabledmeansAxleT emperatureRearGaugeisnotinstalled.
Value1/EnabledmeansAxleTemperatureRearGaugeisinstalled.
01Parametercontrolsthefunctionality(outputonCVSGbusandDTC's)of
thecenteraxletemperaturegauge.
Value0/DisabledmeansAxleT emperatureCenterGaugeisnotinstalled.
Value1/EnabledmeansAxleTemperatureCenterGaugeisinstalled.
01Parametercontrolsthefunctionality(outputonCVSGbusandDTC's)of
thebrakeapplicationpressuregauge.
Value0/DisabledmeansBrakeAppliedPressureGaugeisnotinstalled.
Value1/EnabledmeansBrakeAppliedPressureGaugeisinstalled.
01Parametercontrolsthefunctionality(outputonCVSGbusandDTC's)of
thebrakesaveroiltemperaturegauge.
Valve0/DisabledmeansBrakesaverOilTemperatureGaugeisnotinstalled.
Valve1/EnablemeansBrakesaverOilT emperatureGaugeisinstalled.
01Parametercontrolsthefunctionality(outputonCVSGbusandDTC's)of
theenginecoolanttemperaturegauge.
Value0/DisabledmeansEngineCoolantT emperatureGaugeisnot
installed.
Value1/EnabledmeansEngineCoolantT emperatureGaugeisinstalled.
Explanation
7-4
PM819023/KM815057(08/14/2012)
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