雷克萨斯LX维修技术培训—LEXUS技术资料ppt课件

1、This CD-ROM presentation is addressed to sales and service personnel and contains basic technical information about the features of the LEXUS LX470.This CD-ROM is STRICTLY for IN-DISTRIBUTORand DEALER USE.The letters displayed in the upper right-hand corner represent destination codes of models whic

2、h include the features described in that particular slide.Please include in your presentation all of the relevant slides or explanations whose destination codes correspond to those in your market.This CD-ROM presentation contains photos for the prototype version of the vehicle.As such, some of the p

3、hotos shown here may vary from the model in your market.LX470ContentsnModel OutlinenEnginenChassisnBodynBody ElectricalModel OutlinenLine-upnLine-offnAugust, 2019nModel Line-upDestinationPower TrainEngineAutomatic Transmission-AU.S.A.CanadaTaiwan2UZ-FE (4.7 L)A750F-WRussia-QAustraliaNew Zealand-VG.C

4、.C.Countries-A-W-Q-VModel OutlinenModel CodeUZJ100 L G N A G K A123456781Basic Model CodeUZJ100: with 2UZ-FE Engine2Steering Wheel PositionL: Left-Hand Drive3Body TypeG: Station Wagon4Back Door TypeN: Lift-up Back Door5Transmission TypeA: 5-speed Automatic Transmission6GradeG: 7Engine SpecificationK

5、: DOHC and SFI8Destination-A: U.S.A. , Canada and Taiwan-W: Russia-Q: Australia, New Zealand-V: G.C.C.Countries-A-W-Q-VModel OutlinenEquipmentnLEXUS Night View SystemnThis system may assist the driver for front field of view at nightnThis is optional equipment for U.S.A.Night View DisplayDrivers Vie

6、w-AModel OutlinenMechanismnCranking Hold FunctionnOnce the ignition switch is turned to the START position, this control continues to operate starter until engine startsStarterIgnition SwitchEngine starts“StartOperateOperates Automatically“ONStop-A-W-Q-VModel OutlinenMechanismnA750F Automatic Transm

7、issionnA750F 5-speed automatic transmission(Super ECT ) is newly added-A-W-Q-VModel OutlinenMechanismnVGRS (Variable Gear Ratio Steering) SystemnThe steering gear ratio will be changed in accordance with the vehicle speed Low Ratio (Quick)High Ratio (Slow)Vehicle speed lowVehicle speed highaaa + -A-

8、W-Q-VModel OutlinenPassive SafetynSRS Airbag SystemnRoll sensing of curtain shield airbags control (RSCA) is adopted Both sides curtain sealed airbags Both sides front seat belt pretensionersRSCA Control-A-W-Q-VEnginenCooling SystemnIntake & Exhaust SystemnFuel System nCharging System nEngine Co

9、ntrol SystemEngineRadiator Core03 LX47002 LX4703.0 mm (0.12 in.)3.5 mm (0.14 in.)nCooling SystemnRadiator CorenThe fin pitch of the radiator core is reduced to improve cooling performance -AEnginenIntake & Exhaust SystemnTWCnTandem type TWCs are used to comply the SFTP regulationTandem type TWCs

10、-A-W-Q-VReferencenIntake & Exhaust SystemnTWCnSpecification Cell Density: 62 cells / cm2Wall Thickness : 0.09 mm Volume : 875 cm3Material : CeramicCell Density: 62 cells / cm2Wall Thickness : 0.115 mmVolume : 1083 cm3Material : CeramicNoble PlatinumPortion -A-W-Q-VEnginenFuel SystemnCharcoal Can

11、isternThe capacity of charcoal canister is increased to reduce evaporative emission03 LX47002 LX470Capacity-A3.0 liters (3.17 US qts, 2.64 Imp. qts)2.4 liters (2.54 US qts, 2.11 Imp. qts)-W2.4 liters (2.73 Imp. qts)-Q2.4 liters (2.73 Imp. qts)1.4 liters (1.59 Imp. qts)-V1.4 liters (1.59 Imp. qts)2.4

12、 liters (2.73 Imp. qts)*1.4 liters (1.59 Imp. qts)-A-W-Q-V*: Saudi ArabiaEnginenCharging SystemnAlternatornCompact and lightweight Segment Conductor type alternator is usedSegment ConductorTwistedJoined Segment Conductor SystemJoinedA Cross Section DiagramAStator-AEnginenEngine Control SystemnOxygen

13、 SensornETCS-inFuel Pump ControlnEvaporative Emission Control SystemnCranking Hold FunctionnEngine Control ModulenDiagnosis System-A-W-Q-VEnginenEngine Control SystemnOxygen SensornUltra-high temperature resistant oxygen sensor is used to comply with the SFTP regulationsElementElement CoversBushingH

14、eater Brazing: Ultra-high temperature resistant materials-A-W-Q-VEnginenEngine Control SystemnETCS-inThe accelerator cable and magnetic clutch is discontinuedAccelerator Pedal Position SensorThrottle Position SensorThrottle Control MotorAccelerator Cable02 LX470Accelerator Pedal Position SensorThrot

15、tle Position SensorThrottle Control Motor03 LX470Magnetic ClutchEngine ECU (ECM)Engine ECU (ECM)-A-W-Q-VThrottle Position SensorEnginenEngine Control SystemnETCS-inA No-contact type throttle position sensor is used Throttle Control MotorReduction GearsThrottle ValveHall ICsMagnets-A-W-Q-VReferencenE

16、ngine Control SystemnETCS-inTwo Hall ICs and two magnets are used for throttle position sensor Throttle ValveHall ICsMagnets-A-W-Q-VEnginenEngine Control SystemnETCS-inThrottle position sensor converts into electric signals the magnetic flux density Throttle Valve Opening AngleFull OpenFull CloseVTA

17、VTA2Output Voltage (V)05Engine ECU (ECM)VTAVTA2E2VCHall ICMagnet-A-W-Q-VService PointnEngine Control SystemnETCS-inParts inspection of the throttle position sensor is discontinued02 LX470 (Contact type)03 LX470 (No-contact type)Throttle Control Motor M+ M- : 0.3 100 at 20C (68 F)Magnetic Clutch CL+

18、CL- : 4.2 5.2 at 20C (68 F)Throttle Position Sensor VC E2 : 1.25 2.35 k at 20C (68 F)InspectionThrottle Control Motor M+ M- : 0.3 100 at 20C (68 F)Inspection The magnetic clutch is discontinued The throttle position sensor can not be inspected-A-W-Q-VEnginenEngine Control SystemnETCS-inThe accelerat

19、or pedal position sensor is mounted on the accelerator pedalAccelerator Pedal Position Sensor(Contact Type)VPA1VPA2-A-W-Q-VEnginenEngine Control SystemnFuel Pump ControlnFuel pump speed is controlled as 2-step by using fuel pump resistorEngineECU(ECM)FC+BFPRFuel Pump ResistorFuel Pump RelayCircuit O

20、pening RelayMFuel Pump MotorHiLow-A-W-Q-VReferencenEngine Control SystemnFuel Pump ControlnLocation of fuel pump resistorFuel Pump Resistor-A-W-Q-VEnginenEngine Control SystemnEvaporative Emission Control SystemnThe vacuum type leakage detection function is used to comply with the OBD-II regulations

21、Leaks from a hole of 0.5 mm or more can be detectedCanister Close ValveVapor Pressure SensorCharcoal CanisterTo Intake ManifoldFrom Air Connector PipePurge ValveORVR ValvePressure Switching Valve-AEnginenEngine Control SystemnCranking Hold FunctionnOnce the ignition switch is turned to the START pos

22、ition, this control continues to operate starter until engine startsStarterIgnition SwitchEngine starts“StartOperateOperates Automatically“ONStop-A-W-Q-VEnginenEngine Control SystemnCranking Hold FunctionnSystem DiagramSTACCNETHWPark/Neutral Position SwitchAudio & IlluminationStarter RelayStarte

23、rEngine Coolant Temp. SensorCrankshaft Position SensorACC Cut RelayIgnition SwitchEngine ECU(ECM)-A-W-Q-VSTACCNETHWPark/Neutral Position SwitchAudio & IlluminationStarter RelayStarterEngine Coolant Temp. SensorCrankshaft Position SensorACC Cut RelayIgnition SwitchEngine ECU(ECM)EnginenEngine Con

24、trol SystemnCranking Hold FunctionnThe ACC cut relay cuts off the ACC circuit while engine is cranking to prevent the accessory illumination from operating intermittently-A-W-Q-VEnginenEngine Control SystemnCranking Hold Function (Operation)Ignition SwitchStarter RelayACC Cut RelayNE SignalTimeStart

25、: Without this system: With this systemAutomatically ControlledJudgment0.2 sec. or moreON-A-W-Q-VReferencenEngine Control SystemnCranking Hold FunctionnJudgment of the engine startingEngine Coolant Temp. (C)Judgment Level (rpm)Engine Coolant Temp.Judgment LevelAbove 0 C (32 F)Approx. 500 rpmBelow 0

26、C (32 F)Approx. 500 - 900 rpm5009000Reference Value!-A-W-Q-VConfidentialEnginenEngine Control SystemnCranking Hold FunctionnThe maximum cranking time will be changed with engine coolant temp.Reference Value!Engine Coolant Temp.(C (F)Max. Cranking Time (sec.)100 (212)Approx. 20 (32)Approx. 5-30 (-22)

27、Approx. 25Engine Coolant Temp. (C)Max. Cranking Time (sec.)When engine coolant temp. is lower, the time limit is longer50Confidential-A-W-Q-VEnginenEngine Control SystemnCranking Hold FunctionnIf the engine is already running, the engine ECU (ECM) will not energize to the starter relay StartIgnition

28、 SwitchONOFFEngine is already running700 rpmStarter RelayNE Signal-A-W-Q-VEnginenEngine Control SystemnCranking Hold FunctionnIf the engine speed becomes 1200 rpm or more while cranking, the engine ECU (ECM) turns off a starter relay to prevent starter overrunTime1200 rpmDriver operates intentionall

29、yOFFStarter RelayNE SignalStartIgnition SwitchON-A-W-Q-VEnginenEngine Control SystemnCranking Hold FunctionnWhen a starter is intentionally operated by driver, the engine ECU (ECM) turns off a starter relay after 30 sec. in order to prevent starter overheatingStarter RelayNE Signal30 sec. Driver ope

30、rates intentionallyOFFEngine does not start (Problem)StartIgnition SwitchONTime-A-W-Q-VEnginenEngine Control SystemnEngine Control Modulen32-bit CPU of the engine ECU has been changed from the 16-bit CPU to increase the speed for processing the signals-W-Q-VEnginenEngine Control System nDiagnosis Sy

31、stemnTo comply with the OBD-II regulations, all the DTC have been made to correspond to SAE controlled codes. Some of the DTC have been further divided into smaller detection area than in the past, and new DTC have been assigned to them.DTCDetection ItemP0135Oxygen Sensor Heater Circuit Malfunction

32、(Bank 1 Sensor 1)DTCDetection ItemP0031Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 1)P0032Oxygen Sensor Heater Control Circuit High (Bank 1 Sensor 1)ExampleOld DTCNew DTC-A-W-Q-VChassisnAutomatic TransmissionnBrake Control SystemnSteeringnVGRS (Variable Gear Ratio Steering) SystemnTire a

33、nd WheelChassisnAutomatic TransmissionnA750F Automatic TransmissionnA750F 5-speed automatic transmission(Super ECT ) is newly added-A-W-Q-VChassisnAutomatic TransmissionnA750F Automatic TransmissionnFuel economy and dynamic performance have been improved: 2.804Wide Gear RatioA343FA750FTotal Gear Rat

34、io(Differential Included) Acceleration PerformanceFuel Economy1st2nd3rd4th5th: 3.5201st: 0.716: 0.754(14)(3)-A-W-Q-VChassisnAutomatic TransmissionnSpecificationModel03 LX47002 LX470Transmission Type A750FA343FGear Ratio1st3.5202.8042nd2.0421.5313rd1.4001.0004th1.0000.7545th0.716Reverse3.2242.393Flui

35、d CapacityLiters (US qts, Lmp. qts)10.8 (11.4, 9.5)12.0 (12.7, 10.6)Fluid TypeATF Type T-IVATF Type D-II or equivalent-A-W-Q-VChassisnAutomatic TransmissionnA750F Automatic TransmissionnGate type shift lever is newly usedShift Indicator Light-A-W-Q-VChassisnAutomatic TransmissionnOil PumpnThe cresce

36、nt has been discontinued. As a result oil pump has made more compact and the driving torque has been reducedDrive GearDriven GearPump Body:Made of aluminum to reduce the weightStator ShaftAssemblyCrescentdiscontinued-A-W-Q-VChassisnAutomatic TransmissionnPlanetary Gear UnitnThe 5-speed configuration

37、 has been achieved without increasing the number of planetary gear: Brake: Clutch: One-way ClutchA750A650InputInputOutputOutput3 PlanetaryGears-A-W-Q-VChassisnAutomatic TransmissionnVarious ControlnA750F are performing the following controls Centrifugal Fluid Pressure cancelingLine PressureOptimal C

38、ontrolClutch Pressure ControlFlex Lock-up Clutch ControlAI (Artificial Intelligence)-shift Control-A-W-Q-VChassisnBrake SystemnSpecificationnFront caliper type has been changed for A and W models-A-W-Q-VDestination-A, -W-Q, -VMaster CylinderTypeSingle (Double Piston)Diameter mm (in.)26.99 (1.06)Brak

39、e BoosterTypeHydraulicFront BrakeTypeVentilated DiscCaliper TypeS15+13S14+12Wheel Cylinder Dia. mm (in.)(Front cylinder + Rear cylinder)51.1 x 2 + 45.4 x 2(2.01 x 2 + 1.79 x 2)48.1 x 2 + 42.85 x 2(1.89 x 2 + 1.69 x 2) Rotor Size (D x T) mm (in.)313 x 32 (12.32 x 1.26)Rear BrakeTypeVentilated DiscWhe

40、el Cylinder Dia. mm (in.)48.1 (1.89)Rotor Size (D x T) mm (in.)329.4 x 18 (12.97 x 0.71)ChassisnBrake Control SystemnABS with EBD, Brake Assist, A-TRAC & VSC SystemnThe deceleration sensor and solenoid valves are changedYaw Rate SensorDeceleration SensorSwitching and Control Solenoid ValvesCombi

41、nation MeterSkidControlECUWarning Light SignalHydraulicBrakeBoosterVarious Sensors-A-W-Q-VChassisnBrake Control SystemnYaw Rate and Deceleration SensornDeceleration sensor has been integrated in the yaw rate sensorDecelerationSensor (G Sensor)Yaw Rate Sensor-A-W-Q-VChassisnBrake Control SystemnSwitc

42、hing and Control Solenoid ValvesnThe resistance value of the coil of the solenoid valve was changed for continuation operation time extension of the systemSolenoid ValveRegulator cut solenoidPressure holding solenoid (4-wheels)Accumulator cut solenoidMaster cylinder cut solenoid (FL/FR)Continuation

43、Operation Time03 LX470Approx. 7.2 Approx. 4.3 3 minutes02 LX470Approx. 5.0 Approx. 3.7 50 secondsNOTEWhen the voltage is 13 V:New Model: 7.2 x 7.2 x 1.81 A = 23.58 WPrevious Model: 5 x 5 x 2.60 A = 33.8 W -A-W-Q-VChassisnSteeringnOverallnInternal-external tube bushings and low friction rack guide ha

44、ve been adopted to facilitate a natural steering feelingInternal-external Tube BushingLow-friction Rack Guide-A-W-Q-VChassisnSteeringnReverse Variable Gear Ratio Type Rack BarnGear ratio near the end position of the rack bar is shorter than near the neutral steering position-A-W-Q-VNeutral PositionE

45、nd PositionHollow Type Steering Rack BarSteering Stroke RatioChassisnSteeringnSpecificationItem 03 LX470 (w/ VGRS)02 LX470Gear Ration (Overall)12.4 18.0*19.8No. of Turns Lock to Lock2.4 - 3.5*3.8Fluid TypeATF Type DEXRON II of III*: The gear ratio and the number of lock-to-lock turns are made variab

46、le for the VGRS system-A-W-Q-VChassisnVGRS (Variable Gear Ratio Steering) SystemnGeneralnThe steering gear ratio will be changed in accordance with the vehicle speed Low Ratio (Quick)High Ratio (Slow)Vehicle speed lowVehicle speed highaaa + -A-W-Q-VChassisnVGRS SystemnSystem Diagram (Main Signal)VGR

47、S ECUVGRS ActuatorSkid Control ECUVGRS Warning LightSuspension Control ECUSteering Angle SensorDLC3Steering AngleSteering Wheel Neutral PositionVehicle SpeedEngine SpeedEtc.VGRS Actuator Operating AngleEngine SpeedWheel Angle(Steering Angle + VGRS Actuator Operating Angle)Control SignalTemp. SensorR

48、otational Angle SensorLock MechanismEngine ECU (ECM)VGRS Actuator Actual Operating Angle-A-W-Q-VChassisnVGRS SystemnLocationVGRS ECUVGRS ActuatorSteering Angle SensorVGRS Warning LightCombination Meter-A-W-Q-VChassisnVGRS SystemnSteering Gear RatioVehicle SpeedSteering Gear Ratio: 03 Model with VGRS

49、 System: 02 ModelComparison of the gear ratioGear Ratio : 12.4Lock to Lock : 2.4Gear Ratio : 18.0Lock to Lock : 3.5SlowGear Ratio : 17.3Lock to Lock : 3.3QuickGear Ratio : 19.8Lock to Lock : 3.8VGRS system not operates-A-W-Q-VChassisnVGRS SystemnNormal OperationVGRS ActuatorVGRS ECUSteering Angle Se

50、nsorVehicle SpeedSkid Control ECUSteering AngleVehicle SpeedActuator Operating AngleMapCalculate actuator target operating angleControl Signal (Target Operating Angle)MotorGear-A-W-Q-VReferencenVGRS SystemnControlnThe VGRS ECU adds the supplemental assist with steering speed to reduce delay of vehic

51、le responseVGRS + AssistActuator OutputNormal Operation-A-W-Q-VSlippery SurfaceChassisnVGRS SystemnCooperative Control of Brake Control SystemnFor example, in order to enable quicker steering when braking suddenly (VSC active)Drives steering effortBrakingEffectiveness of Cooperative Control of Brake

52、 Control System-A-W-Q-VReferencenVGRS SystemnCooperative Control of Brake Control SystemnThis control operates by signal from skid control ECUVGRS ECUVGRS ActuatorSkid Control ECURequest the cooperative control Most low gear ratio assist-A-W-Q-VChassisnVGRS SystemnVGRS ActuatorReduction MechanismLoc

53、k MechanismDC MotorSpiral CableVGRS ActuatorSteering WheelRack & Pinion Rubber Coupling-A-W-Q-VService PointnVGRS SystemnVGRS ActuatornExchange VGRS actuator assembly (overhaul is impossible)Remove AssemblyNew VGRS ActuatorInstallAssemblyBrokenVGRS ActuatorVGRS ActuatorParts Number: 45220-60180-

54、A-W-Q-VChassisnVGRS SystemnSpiral CablenFlexible flat cable is usedVGRS ECUPower SourceControl SignalRotational angle and rotational direction of the DC motorMotor-A-W-Q-VService PointnVGRS SystemnSpiral CablenSecure the neutral position of this cable before installing VGRS actuator (same as spiral

55、cable for drivers airbag)Turn the cable clockwise until it becomes harder to turnThen turn the cable counterclockwise about 2.5 turns2.5 rev.-A-W-Q-VReferencenVGRS SystemnSpiral CablenSystem diagram (VGRS ECU VGRS actuator)VGRS ActuatorLock SolenoidMVMSUVGRS ECUMSVMSWMGBMUBMVBMWLGDC Brushless MotorS

56、piral CableHall ICs-A-W-Q-VChassisnVGRS SystemnLock MechanismnThis mechanism locks the motor shaft, so that if the system will be failureMotor ShaftAAA A Cross SectionLock Holder (Motor Shaft)SolenoidLock Lever(Housing)Return Spring-A-W-Q-VChassisnVGRS SystemnLock MechanismSolenoid “ON”Solenoid “OFF

57、”System is NormalEngine is stopped System is failure (Fail Safe)LockUnlock-A-W-Q-VChassisnVGRS SystemnMotornA compact high-output low-noise DC brush-less motor is controlled by duty signalMagnetCoilMotor ShaftRotational Angle sensor (Three Hole ICs) is included in the motorDC MotorReduction Mechanis

58、m-A-W-Q-VDriven GearStator GearFlexible GearWave GeneratorChassisnVGRS SystemnReduction MechanismnThe strain wave gearing type reduction mechanism is usedSteering WheelMotorOutput ShaftStator GearWave GeneratorDriven GearFlexible Gear-A-W-Q-VChassisnVGRS SystemnReduction MechanismnComponentsSteering

59、 WheelRack & PinionWave Generator (input)Stator Gear (input)Driven Gear (output)Flexible Gear-A-W-Q-VChassisnVGRS SystemnReduction MechanismnComponentsCoupled to the housing of the VGRS actuatorFlexible metal bodyGear teeth are meshed with the inside of both stator gear and driven gearCoupled to

60、 the output shaft of the VGRS actuatorConsists an oval-shaped cam and bearingRotated by the DC motorNumber of teeth: 102Number of teeth: 100Number of teeth: 100-The difference of number of teethWave Generator (input)Stator Gear (input)Driven Gear (output)Flexible GearTeethTeethTeeth-A-W-Q-VChassisnVGRS SystemnReduction Mechanis