6ENGINESYSTEMS
CoolantControlValve(CCV)assemblyoperation.......................................................40
EngineBrakeSystem...................................................................................................41
EngineBrakeControlSystemComponents..............................................................41
EngineBrakeSystemDescription..........................................................................42
EngineBrakeSystemOperation............................................................................42
ElectronicControlSystem.............................................................................................43
ElectronicControlSystemComponents..................................................................43
OperationandFunction.............................................................................43
ReferenceVoltage(VREF)..........................................................................43
SignalConditioner...................................................................................43
Microprocessor.......................................................................................43
DiagnosticTroubleCodes..........................................................................43
MicroprocessorMemory............................................................................43
ActuatorControl......................................................................................44
Actuators........................................................................................................44
CoolantControlValve(CCV).......................................................................44
ExhaustBackPressureValve(EBPV)Control..................................................44
ExhaustGasRecirculation(EGR)Valve.........................................................44
AirControlValve(ACV).............................................................................45
InletAirHeaterRelay(IAHR).......................................................................45
InletAirHeaterFuelSolenoid(IAHFS)Valve....................................................45
EngineThrottleValve(ETV)........................................................................45
FuelPressureControlValve(FPCV)..............................................................45
AftertreatmentFuelShutoffValve(AFTFSV)....................................................45
AftertreatmentPurgeAirValve(AFTPAV)........................................................45
DieselExhaustFluidDosingUnitHeater(DEFDUH)...........................................45
DieselExhaustFluidDoserValve(DEFDV)......................................................46
DieselExhaustFluidLineHeaterRelay(DEFLHR).............................................46
DieselExhaustFluidPressureLineHeater(DEFPLH).........................................46
DieselExhaustFluidReturnLineHeater(DEFRLH)...........................................46
DieselExhaustFluidReturnValve(DEFRV).....................................................46
DieselExhaustFluidSuctionLineHeater(DEFSLH)..........................................46
DieselExhaustFluidSupplyPump(DEFSP)andTemperatureSensor....................46
DieselExhaustFluidTankHeaterValve(DEFTHV).............................................46
DieselExhaustFluidUnitHeaterRelay(DEFUHR).............................................46
EngineandVehicleSensors.................................................................................46
ThermistorSensors..................................................................................46
VariableCapacitanceSensors.....................................................................48
MagneticPickupSensors...........................................................................50
PotentiometerSensors..............................................................................51
Switches...............................................................................................51
AdditionalSensors............................................................................................52
Ammonia(NH
3
)SensorModule....................................................................52
HumiditySensor(HS)................................................................................52
NitrogenOxides(NOx)INSensorModule.......................................................52
NitrogenOxides(NOx)OUTSensorModule....................................................52
OxygenSensor(O
2
S)................................................................................52