Code(DTC),Guide Trucks Frombuilddate1.2007 …

1 ServiceManualTrucksGroup36 VehicleElectronicControlUnit(MID144),Dia gnosticTroubleCode(DTC), , ,thisisareferencetoaLaborCode(StandardTi me).Serviceprocedureswhichdonotincludean operationnumberinthetitleareforgeneralin formationandnoreferenceismadetoaLaborCod e(StandardTime). , ,cautionsandwarningsareusedinthisService Documentation:Note:Indicatesaprocedure,p ractice, , ,NCUSAO rdernumber:PV776-88951780 Repl: 2010 MackTrucks,Inc.,Greensboro, ,storedinretrievalsystem,ortransmittedin anyformsbyanymeans,electronic,mechanical ,photocopying,recordingorotherwise,witho utthepriorwrittenpermissionofMackTrucks, , .SystemOverviewTheVehicleElectronicContr olUnit(VECU)isamicroprocessorbasedcontro ller,programmedtoperformseveralfunctions ,theseinclude: Drivercontrols Vehicleandenginespeedcontrols Startercontrol Cabpower Broadcastingdataontheserialdatalines Tripdatalogging Diagnosticfaultloggingandpasswordprocess ingTheVECU performsthesefunctionsbymonitoringthesig nalsfromsensorsandswitches, (TP)SensorandVehicleSpeedSensor(VSS).

2 TheVECU alsomonitorsthepositionorstateofmultiple switches, : A/CPressureSwitch AirSuspensionHeightControlSwitch DifferentialLockSwitch EngineBrakeSwitches IgnitionKeySwitch PTOS witches(ifequipped) ServiceandParkBrakeSwitches SpeedControlSwitches(Set/Decel,Resume/Ac cel) , ,thebroadcastbetweenmodulesalsoincludesv ariouscalculationsandconclusionseachmodu lehasdeveloped, ,thefaultwillbeloggedinoneorbothofthemod ules memory,thevehicleoperatorwillbeadvisedth atafaulthasoccurredbytheilluminationofam alfunctionindicatorlampandamessageinthed riverinformationdisplay, , ,contactyourlocaldealerorvisit .3 Group36 VehicleControlUnit,FaultTracingTroublesh ootingVehicleControlUnit, . ssupplement(PPID,PSID). :Identificationofaparameter(value).PPIDP roprietaryParameterIdentificationDescrip tionMack:Uniqueidentificationofaparamete r(value). ,butabovethenormalworkrange1 ToolowvalueDatavalid,butbelowthenormalwo rkrange2 IncorrectdataDataerratic,Intermittentori ncorrect3 ElectricalfaultVoltageabovenormalorshort edhigh4 ElectricalfaultVoltagebelownormalorshort edlow5 ElectricalfaultCurrentbelownormaloropenc ircuit6 ElectricalfaultCurrentabovenormalorgroun dedcircuit7 MechanicalfaultMechanicalsystemnotrespon dingproperly8 MechanicalorelectricalfaultAbnormalfrequ ency,pulsewidthorperiod9 CommunicationfaultAbnormalupdaterate10 MechanicalorelectricalfaultAbnormalrateo fchange11 UnknownfaultFailuremodenotidentifiable12 ComponentfaultBadintelligentdeviceorcomp onent13 IncorrectcalibrationOutofcalibration14 UnknownfaultSpecialinstructions15 UnknownfaultReservedforfutureassignmentb ySAEDataFormalSubcommittee4 Group36 VehicleControlUnit,FaultTracingMID144 VehicleECU,FaultCodesPID MID144 PID83 RoadSpeedLimitStatus ,page7 MID144 PID84 VehicleSpeed ,page7 MID144 PID86 CruiseControl.

3 SetSpeed ,page7 MID144 PID91 AcceleratorPedalPosition(Percentage) ,page8 MID144 PID152 VehicleECU,NumberofResets ,page8 MID144 PID191 OutputShaftSpeed ,page8 PPID MID144 PPID3 StarterrelayOutput ,page9 MID144 PPID60 IdleValidationSwitch,Power ,page9 MID144 PPID69 BufferedIdleValidationSwitch ,page9 MID144 PPID70 PedalSwitches,Supply ,page9 MID144 PPID71 CruiseControlandEngineBrake,SwitchSupply ,page9 MID144 PPID72 AcceleratorPedalandEngineBrake,SensorsSu pply ,page10 MID144 PPID73 SecondAcceleratorPedal,SupplySensors ,page10 MID144 PPID74 VehicleECU,PowerSupply ,page11 MID144 PPID265 VehicleSpeedSensorSupply ,page11 MID144 PPID279 Airdryer,DryAgentReservoir ,page11 MID144 PPID312 AirDryer,Regeneration ,page11 MID144 PPID430 AirDryer,Regeneration ,page12 SID MID144 SID230 IdleValidationSwitch1 ,page12 MID144 SID231 SAEJ1939 DataLink ,page12 MID144 SID240 ProgramMemory ,page12 MID144 SID243 CruiseControlSetSwitch ,page12 MID144 SID250 SAEJ1587 DataLink.

4 Page13 MID144 SID253 CalibrationMemoryEEPROM ,page135 Group36 VehicleControlUnit,FaultTracingPSID MID144 PSID1 RetarderControlSetSwitch ,page13 MID144 PSID2 IdleValidationSwitch2 ,page13 MID144 PSID4 EngineBrakeStalkLever ,page14 MID144 PSID8 NeutralPositionError ,page14 MID144 PSID14 DataMaxGeneralError ,page14 MID144 PSID16 PowerRelay1 ,page14 MID144 PSID17 PowerRelay2 ,page15 MID144 PSID20 PowerTake-offSignal ,page15 MID144 PSID23 AirDryer,Regenerating ,page15 MID144 PSID24 Compressor,Control ,page15 MID144 PSID25 AirLeakage ,page16 MID144 PSID200 CommunicationInterference,DataLink,Engin eControlModule(ECM) ,page16 MID144 PSID202 CommunicationInterference,DataLink,Instr umentation ,page16 MID144 PSID204 CommunicationInterference,DataLink,Brake ControlModule ,page16 MID144 PSID205 CommunicationInterference,DataLink,Trans missionControlModule ,page17 MID144 PSID206 CommunicationInterference,DataLink,Retar derControlModule ,page17 MID144 PSID207 CommunicationInterference,DataLink,GearS electorControlModule ,page17 MID144 PSID208 CommunicationInterference,DataLink,AirSu spension ,page17 MID144 PSID210 SAEJ1939 DataLinkInterruption,LightingControlModu le(LCM) ,page17 MID144 PSID211 SAEJ1939 DataLinkInterruption,CollisionAvoidanceC ontrolModule ,page18 MID144 PSID214 DataLink,BodybuilderControlModule ,page18 MID144 PSID230 SoftwareFault ,page186 Group36 VehicleControlUnit,FaultTracingMID144 PID83 RoadSpeedLimitStatusTypeoffault:FMID escription:FaultCondition:PossibleSympto ms:PossibleCause.

5 FMI14 Specialinstructions Lowairsuspensionroadspeedlimitexceeded(D riverexceededlimitwithAirSuspensionlower ed) N/A Exceedingroadspeedlimitwithairsuspension loweredMID144 PID84 VehicleSpeedTypeoffault:FMID escription:FaultCondition:PossibleSympto ms:PossibleCause:FMI2 Intermittentorincorrectdata SpeedsignalfromspeedometerandABSdifferst oomuch Gaugedrops/inoperable Incorrectroadspeeddisplayedincluster VSSH arness VSSS ensor WrongK-factoryvalue(MGandMHparameterinVE CU) ABSreportedspeedmissingorinconsistentFMI 5 Currentbelownormaloropencircuit Sensoropenorshortedtoground Incorrectroadspeeddisplayedincluster VSSH arness/connector VSSS ensorFMI6 Currentabovenormalorgroundedcircuit Shortacrosssensor Incorrectroadspeeddisplayedincluster VSSH arness/connector VSSS ensorFMI14 Specialinstructions Intermittentfaultydata SpeedsignalfromVSSwasupdatedincorrectly Incorrectroadspeeddisplayedincluster SAEJ1587datalink WiringharnessMID144 PID86 CruiseControl,SetSpeedTypeoffault:FMID escription:FaultCondition:PossibleSympto ms:PossibleCause.

6 FMI14 SpecialInstructions TimeoutonACC1messagewithadamptivecruisei nstalled N/A FaultyornoinfofromACC(VORAD) Wiringharness7 Group36 VehicleControlUnit,FaultTracingMID144 PID91 AcceleratorPedalPosition(Percentage)Type offault:FMID escription:FaultCondition:PossibleSympto ms:PossibleCause:FMI3 Abnormallyhighvoltageorshortcircuittohig hervoltage YellowChecklamplit Enginewillnotsupplyrequestedfueltoengine Acceleratorpedalpositionharnessshortedhi gh FaultyacceleratorpedalpositionsensorFMI4 Abnormallylowvoltageorshortcircuittolowe rvoltage YellowChecklamplit Enginewillnotsupplyrequestedfueltoengine Acceleratorpedalpositionharnessshortedlo w Faultyacceleratorpedalpositionsensor LossofsensorsignalFMI5 Abnormallylowcurrentoropencircuit InputtoolowcomparedtoIVS1&IVS2 YellowChecklamplit Enginewillnotsupplyrequestedfueltoengine FaultyacceleratorpedalpositionsensorFMI6 Abnormallyhighcurrentorshortcircuittogro und InputtolowcomparedtoIVS1&IVS2 YellowChecklamplit Enginewillnotsupplyrequestedfueltoengine Faultyacceleratorpedalpositionsensor LossofsensorgroundFMI14 SpecialInstructions SupplyErrorfromPPID72 YellowChecklamplit Enginewillnotsupplyrequestedfueltoengine AcceleratorpedalpositionharnessMID144 PID152 VehicleECU.

7 NumberofResetsTypeoffault:FMID escription:FaultCondition:PossibleSympto ms:PossibleCause:FMI12 Faultymoduleorcomponent Internalsoftwarefaultcausingareset Systemrestarted VECUMID144 PID191 OutputShaftSpeedTypeoffault:FMID escription:FaultCondition:PossibleSympto ms:PossibleCause:FMI5 Abnormallylowcurrentoropencircuit Lowercurrentthenexpected N/A Faultyvehiclespeedsensor(VSS) WiringharnessFMI6 Abnormallyhighcurrentorshortcircuittogro und Highercurrentthenexpected N/A Faultyvehiclespeedsensor(VSS) Wiringharness8 Group36 VehicleControlUnit,FaultTracingMID144 PPID3 StarterrelayOutputTypeoffault:FMID escription:FaultCondition:PossibleSympto ms:PossibleCause:FMI3 Voltageabovenormalorshortedhigh Excessivecurrentthroughdrivecircuitry N/A ShortinharnessordriverelaysMID144 PPID60 IdleValidationSwitch,PowerTypeoffault:FM ID escription:FaultCondition:PossibleSympto ms:PossibleCause:FMI4 Abnormallylowvoltageorshortcircuittolowe rvoltage Lowervoltagethenexpected N/A Wiringharness VECU Defectiveidlevalidationswitch Lossofpowersupplytotheidlevalidationswit chMID144 PPID69 BufferedIdleValidationSwitchTypeoffault: FMID escription:FaultCondition:PossibleSympto ms:PossibleCause:FMI3 Abnormallyhighvoltageorshortcircuittohig hervoltage BufferedIVS1toohighcomparedtoIVS1signal YellowChecklamplit Signalshortedhigh FaultyharnessFMI4 Abnormallylowvoltageorshortcircuittolowe rvoltage BufferedIVS1toolowcomparedtoIVS1signal YellowChecklamplit Signalshortedlow FaultyharnessMID144 PPID70 PedalSwitches,SupplyTypeoffault:FMID escription:FaultCondition:PossibleSympto ms:PossibleCause:FMI4 Abnormallylowvoltageorshortcircuittolowe rvoltage Voltagebelow3V YellowChecklamplit Faultyconnector Faultyharness SupplyvoltageshortedlowMID144 PPID71 CruiseControlandEngineBrake,SwitchSupply Typeoffault:FMID escription:FaultCondition.

8 PossibleSymptoms:PossibleCause:FMI4 Abnormallylowvoltageorshortcircuittolowe rvoltage Voltagebelow3V YellowChecklamplit Enginewillnotsupplyrequestedfuelincrease Faultyconnector Faultyharness Supplyvoltageshortedlow9 Group36 VehicleControlUnit,FaultTracingMID144 PPID72 AcceleratorPedalandEngineBrake,SensorsSu pplyTypeoffault:FMID escription:FaultCondition:PossibleSympto ms:PossibleCause:FMI3 Abnormallyhighvoltageorshortcircuittohig hervoltage YellowChecklamplit Requestedfuelnotsuppliedtoengine Enginebrakeretarderisdisabled Acceleratorpedalpositionsensorharnesssho rtedhigh AcceleratorpedalpositionsensorFMI4 Abnormallylowvoltageorshortcircuittolowe rvoltage YellowChecklamplit Requestedfuelnotsuppliedtoengine Enginebrakeretarderisdisabled Acceleratorpedalpositionsensorharnesssho rtedlow AcceleratorpedalpositionsensorMID144 PPID73 SecondAcceleratorPedal,SupplySensorsType offault:FMID escription:FaultCondition:PossibleSympto ms:PossibleCause:FMI3 Abnormallyhighvoltageorshortcircuittohig hervoltage YellowChecklamplit Enginewillnotsupplyrequestedfueltoengine Displayshowminimumwettankpressure Signalshortedtohigh Faultyharness FaultytankairpressuresensorFMI4 Abnormallylowvoltageorshortcircuittolowe rvoltage YellowChecklamplit Enginewillnotsupplyrequestedfueltoengine Displayshowminimumwettankpressure Signalshortedlow Faultyharness Faultytankairpressuresensor10 Group36 VehicleControlUnit,FaultTracingMID144 PPID74 VehicleECU,PowerSupplyTypeoffault:FMID escription:FaultCondition:PossibleSympto ms:PossibleCause:FMI4 Abnormallylowvoltageorshortcircuittolowe rvoltage YellowChecklamplit Enginewillnotsupplyrequestedfueltoengine Displayshowminimumwettankpressure Signalshortedlow Faultyharness FaultytankairpressuresensorMID144 PPID265 VehicleSpeedSensorSupplyTypeoffault:FMID escription:FaultCondition:PossibleSympto ms:PossibleCause.

9 FMI3 Abnormallyhighvoltageorshortcircuittohig hervoltage Voltageabove9V YellowChecklamplit VSSharnessshortedhigh FaultyVSSFMI4 Abnormallylowvoltageorshortcircuittolowe rvoltage YellowChecklamplit VSSharnessshortedlow FaultyVSSMID144 PPID279 Airdryer,DryAgentReservoirTypeoffault:FM ID escription:FaultCondition:PossibleSympto ms:PossibleCause:FMI0 Datavalid,butabovethenormalworkingrange Airvolumetoohighpumpingthroughtheaircart ridge YellowChecklamplit Aircartridgevalvesmaybehardtohandle AirFilterMID144 PPID312 AirDryer,RegenerationTypeoffault:FMID escription:FaultCondition:PossibleSympto ms:PossibleCause:FMI0 Datavalid,butabovethenormalworkingrange Airflowusedistohightogettimetoregenerate YellowChecklamplit Reducedairpumpability AirFilter Plainairleakage ECSFMI7 Incorrectresponsefromamechanicalsystem Valvehavebeenopenfor30secondsandthepress ureisstillthesame N/A Faultyharness Valveblockstuckopen Airfilter11 Group36 VehicleControlUnit,FaultTracingMID144 PPID430 AirDryer,RegenerationTypeoffault:FMID escription:FaultCondition:PossibleSympto ms:PossibleCause:FMI0 Datavalid,butabovethenormalworkingrange Airflowusedistoohightogettimetoregenerat e YellowChecklamplit Reducedairpumpability Airsuspensionregulatestoomuch Airleak AirFilterMID144 SID230 IdleValidationSwitch1 Typeoffault:FMID escription:FaultCondition:PossibleSympto ms:PossibleCause.

10 FMI7 Incorrectresponsefromamechanicalsystem FaultyreadoutfromIVS1 YellowChecklamplit Enginewillnotsupplyrequestedfueltoengine IdleValidationSwitch(IVS) IVSconnector IVSharness LossofgroundtotheacceleratorpedalsensorM ID144 SID231 SAEJ1939 DataLinkTypeoffault:FMID escription:FaultCondition:PossibleSympto ms:PossibleCause:FMI2 Intermittentorincorrectdata VECU doesn tgetacknowledgeonsentmessages YellowChecklamplit CANcommunication SAEJ1939datalinkdown/shortedMID144 SID240 ProgramMemoryTypeoffault:FMID escription:FaultCondition:PossibleSympto ms:PossibleCause:FMI2 Intermittentorincorrectdata Checksumcalculatedatstartupdiffersfromth estoredone YellowChecklamplit ECUkeepsresetting Vehiclenotdrivable Softwareerror Faultyflashhardware VECUMID144 SID243 CruiseControlSetSwitchTypeoffault:FMID escription:FaultCondition:PossibleSympto ms:PossibleCause:FMI7 Incorrectresponsefromamechanicalsystem SignalsSET+andSET-receivedatthesametime YellowChecklamplit Cruisecontroldeactivated Faultyharness Connector12 Group36 VehicleControlUnit,FaultTracingMID144 SID250 SAEJ1587 DataLinkTypeoffault:FMID escription:FaultCondition:PossibleSympto ms:PossibleCause:FMI2 Intermittentorincorrectdata Faultymessagesonthelinkreceived Somefunctiondisturbancesmayoccur SAEJ1587datalinkdown/shortedMID144 SID253 CalibrationMemoryEEPROMT ypeoffault:FMID escription:FaultCondition:PossibleSympto ms:PossibleCause:FMI2 Intermittentorincorrectdata Datasetshaveincorrectchecksum YellowChecklamplit Somefunctionsmaybedeactivated FaultyEEPROM VECUFMI14 Specialinstructions Incorrectdat