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EGENGINE– 2GR-FE ENGINEEG-95JENGINE CONTROL SYSTEM1.GeneralThe engine control system of the 2GR-FE engine has the following features.SystemOutlineEFIElectronic FuelInjectionDAn L-type EFI system directly detects the intake air mass with a hot wiretype air flow meter.DThe fuel injection system is a sequential multiport fuel injection system.DFuel injection takes two forms:Synchronous injection, which always takes place with the same timing inaccordance with the basic injection duration and an additional correctionbased on the signals provided by the sensors.Non-synchronous injection, which takes place at the time an injectionrequest based on the signals provided by the sensors is detected, regardlessof the crankshaft position.DSynchronous injection is further divided into group injection during a coldstart, and independent injection after the engine is started.ESAElectronic SparkAdvanceDIgnition timing is determined by the engine ECU based on signals fromvarious sensors. The engine ECU corrects ignition timing in response toengine knocking.DThis system selects the optimal ignition timing in accordance with the signalsreceived from the sensors and sends the (IGT) ignition signal to the igniter.ETCS-iElectronicThrottle ControlSystem-intelligent[See page EG-108]Optimally controls the throttle valve opening in accordance with the amountof accelerator pedal effort and the condition of the engine and the vehicle.Dual VVT-iDual Variable ValveTiming-intelligent[See page EG-110]Controls the intake and exhaust camshafts to an optimal valve timing inaccordance with the engine condition.ACISAcoustic ControlInduction System[See page EG-116]The intake air passages are switched according to the engine speed and throttlevalve opening angle to provided high performance in all speed ranges.Air Intake ControlSystem[See page EG-118]The intake air duct is divided into two areas, and the engine ECU controls theair intake control valve and the actuator that are provided in one of the areasto reduce the amount of engine noise.Fuel Pump ControlDFuel pump operation is controlled by signals from the engine ECU.DThe fuel pump is stopped, when the SRS airbag is deployed in a frontal,side, and rear of side collision.DThe basic system construction and operation of this control are the same asthose of the control used on the 1AZ-FE and 2AZ-FE engines. For detailsof this control, see page EG-54.Air ConditionerCut-off ControlBy turning the air conditioner compressor ON or OFF in accordance with theengine condition, drivability is maintained.(Continued) ENGINE– 2GR-FE ENGINEEG-96SystemOutlineCooling Fan Control[See page EG-119]The Cooling Fan ECU steplessly controls the speed of the fans in accordancewith the engine coolant temperature, vehicle speed, engine speed, and airconditioner operating conditions. As a result, the cooling performance isimproved.Starter Control*Cranking HoldFunctionDOnce the engine switch is pushed, while the brake pedal is depressed, thiscontrol continues to operate the starter until the engine started.DThe basic system construction and operation of this control are the same asthose of the control used on the 1AZ-FE and 2AZ-FE engines. For detailsof this control, see page EG-56.Air Fuel RatioSensor and OxygenSensor Heater ControlMaintains the temperature of the air fuel ratio sensor or oxygen sensor at anappropriate level to increase accuracy of detection of the oxygenconcentration in the exhaust gas.Evaporative EmissionControlThe engine ECU controls the purge flow of evaporative emission (HC) in thecanister in accordance with engine conditions.Active ControlEngine Mount[See page EG-92]The damping characteristic of the front engine mount is controlled variablyto reduce idling vibration.Engine ImmobilizerProhibits fuel delivery and ignition if an attempt is made to start the enginewith an invalid key.Diagnosis[See page EG-121]When the engine ECU detects a malfunction, the engine ECU diagnoses andmemorizes the failed section.Fail-Safe[See page EG-121]When the engine ECU detects a malfunction, the engine ECU stops or controlsthe engine according to the data already stored in the memory.*: Only for models with smart entry and start system EGENGINE – 2GR-FE ENGINE01YEG05TEAIR FLOW METERINTAKE AIR TEMP. SENSORCRANKSHAFT POSITIONSENSORWATER TEMP. SENSORACCELERATOR PEDALPOSITION SENSOR SENSORTHROTTLE POSITIONSENSORKNOCK SENSORSINTAKE VVT SENSORSEXHAUST VVT SENSORSSTOP LIGHT SWITCHCOMBINATION METERD Vehicle Speed SignalVGTHANE+THWVPAVPA2VTA1VTA2KNK1KNK2VCV1+VCV2+VCE1VCE2STPSPDEngineECU#10#20#30#40#50#60IGT1 XIGT6IGF1M+OC1+OC2+OE1+OE2–ACISEFINo.1 INJECTORNo.2 INJECTORNo.3 INJECTORNo.4 INJECTORNo.5 INJECTORNo.6 INJECTORESAIGNITION COILwith IGNITERSPARK PLUGSETCS-iTHROTTLE CONTROLMOTORVVT-i (INTAKE SIDE)CAMSHAFT TIMING OILCONTROL VALVE RHCAMSHAFT TIMING OILCONTROL VALVE LHVVT-i (EXHAUST SIDE)CAMSHAFT TIMING OILCONTROL VALVE RHCAMSHAFT TIMING OILCONTROL VALVE LHACIS ACTUATORACISEG-972. ConstructionThe configuration of the engine control system is as shown in the following chart.(Continued) ENGINE – 2GR-FE ENGINE02KEG35TEIG2 RELAY*1MAIN BODY ECU*1ENGINE SWITCH*1IGNITION SWITCH*2D Starting SignalD Ignition SignalNEUTRAL START SWITCHAIR FUEL RATIO SENSOR(Bank 1, Sensor 1)(Bank 2, Sensor 1)HEATED OXYGEN SENSOR(Bank 1, Sensor 2)(Bank 2, Sensor 2)POWER STEERING OILPRESSURE SWITCHID CODE BOX*1TRANSPONDER KEY ECU*2IGSW*1STA*2IGSW*2NSWA1A+A2A+OX1BOX2BPSWIMIIMOEngineECUAICVFCRFCSTSW*1ACCR*1STAR*1STA*1HA1AHA2AHT1BHT2BAIR INTAKE CONTROL SYSTEMVSVFUEL PUMP CONTROLCircuit Opening RelayCOOLING FAN CONTROLCooling Fan ECUFan Motor No.1, No.2STARTER CONTROL*1Main Body ECUACC RelayStarter Cut RelayNeutral Start SwitchStarter RelayAIR FUEL RATIO SENSORHEATER CONTROLAir Fuel Ratio SensorHeater (Bank 1, Sensor 1)Air Fuel Ratio SensorHeater (Bank 2, Sensor 1)OXYGEN SENSORHEATER CONTROLHeated Oxygen SensorHeater (Bank 1, Sensor 2)Heated Oxygen SensorHeater (Bank 2, Sensor 2)EG-98(Continued) EGENGINE – 2GR-FE ENGINE02KEG36TEEFI MAIN RELAYBATTERYDLC3 (Data Link Connector 3)ACTIVE CONTROLENGINE MOUNT ECU*4AIRBAG SENSORASSEMBLYA/C ECUDISTANCECONTROL ECU*5CAN GATEWAY ECU+B, +B2MRELBATT, +BMTACHTCCANHCANLCAN(CAN No.1 Bus)CAN(CAN No.2 Bus)EngineECUSKID CONTROL ECUMETER ECUPRGACM*3WCAN+CAN–Local CANEVAPORATIVE EMISSION CONTROLVSV (For Purge VSV)ACTIVE CONTROL ENGINE MOUNT*3VSVCOMBINATION METERCheck Engine Warning LightECT ECUEG-99*1: Only for models with smart entry and start system*2: Only for models without smart entry and start system*3: Only for models without power tilt and power telescopic steering column*4: Only for models with power tilt and power telescopic steering column*5: Only for models with dynamic radar type cruise control system ENGINE – 2GR-FE ENGINE02KEG37TECombination MeterD Vehicle Speed SignalD Check Engine Warning LightNeutralStart SwitchEngine SwitchMain Body ECUIG2 Relay*1Ignition Switch*2Power SteeringOil Pressure SwitchElectronic ControlledTransmission Solenoid ValveStarter Cut RelayECT ECUBatteryLocal CANNeutralStart SwitchCircuit OpeningRelayAccelerator PedalPosition SensorCooling Fan ECUDLC3CAN(CAN No.1 Bus)Cooling FanFuel PumpStop Light SwitchEngine ECUEVAPValveIntake AirTemp. SensorThrottleControlMotorVSV*3ForActive ControlEngine MountCanisterACIS ActuatorVSV (ForAir IntakeControl)Air FlowMeterThrottle PositionSensorActive Control EngineMount ECU*4AirIntake Camshaft TimingOil Control Valve LHInjectorInjectorIntake VVTSensor LHIntake Camshaft TimingOil Control Valve RHIntake VVT Sensor RHIgnition Coil With IgniterExhaust VVT Sensor RHExhaust Camshaft TimingOil Control Valve RHExhaust VVTSensor LHKnockSensorTWCTWCExhaust CamshaftTiming Oil ControlValve LHAir Fuel Ratio Sensor(Bank 1, Sensor 1)Water Temp.SensorCrankshaftPosition SensorHeated Oxygen Sensor(Bank 1, Sensor 2)TWCHeated Oxygen Sensor(Bank 2, Sensor 2)Starter RelayAir FuelRatio Sensor(Bank 2, Sensor 1)EG-1003. Engine Control System Diagram*1: Only for models with smart entry and start system*2: Only for models without smart entry and start system*3: Only for models without power tilt and power telescopic steering column*4: Only for models with power tilt and power telescopic steering column EGENGINE – 2GR-FE ENGINE285EG49285EG50Intake VVTSensor LHIntake Camshaft TimingOil Control Valve LHIgnition Coilwith IgniterInjectorWater Temp.SensorAir Fuel Ratio Sensor(Bank 2, Sensor 1)Exhaust VVTSensor LHCrankshaftPosition SensorExhaust CamshaftTiming OilControl Valve LHIntake Camshaft TimingOil Control Valve RHExhaust VVTSensor RHIntake VVTSensor RHExhaust CamshaftTiming OilControl Valve RHAir Fuel Ratio Sensor(Bank 1, Sensor 1)ACIS Actuator Throttle Position SensorKnock Sensor 1Knock Sensor 2EG-1014. Layout of Main Components ENGINE – 2GR-FE ENGINE02KEG38YVSV(for Air Intake Control)Air Cleaner CapD Vacuum TankEngineECUAir Flow MeterD Intake Air Temp. SensorFuel PumpActuator(for Air Intake Control)Heated Oxygen Sensor(Bank 1, Sensor 2)Heated Oxygen Sensor(Bank 2, Sensor 2)CoolingFan ECUVSV*1Vacuum Type*1Electric Type*2Active Control Engine MountCheck Engine Warning LightStop Light SwitchAccelerator PedalPosition SensorDLC3Active ControlEngine Mount ECU*2LHD ModelEG-102*1: Only for models without power tilt and power telescopic steering column*2: Only for models with power tilt and power telescopic steering column EGENGINE– 2GR-FE ENGINEEG-1035.Main Component of Engine Control SystemGeneralThe main components of the 2GR-FE engine control system are as follows:Components Outline Quantity FunctionEngine ECU 32-bit CPU 1The engine ECU optimally controls the EFI ESA andISC to suit the operating conditions of the engine inaccordance with the signals provided by the sensors.Oxygen Sensor(Bank 1, Sensor 2)(Bank 2, Sensor 2)Cup Typewith Heater2DThis sensor detects the oxygen concentration in theexhaust emission by measuring the electromotiveforce which is generated in the sensor itself.DThe basic construction and operation of this sensorare the same as in the 1AZ-FE and 2AZ-FE engines.For details, see page EG-46.Air FuelRatio Sensor(Bank 1, Sensor 1)(Bank 2, Sensor 1)Planar Typewith Heater2DAs with the oxygen sensor, this sensor detects theoxygen concentration in the exhaust emission.However, it detects the oxygen concentration in theexhaust emission linearly.DThe basic construction and operation of this sensorare the same as in the 1AZ-FE and 2AZ-FE engines.For details, see page EG-46.Air Flow Meter Hot-wire Type 1DThis sensor has a built-in hot-wire to directly detectthe intake air mass.DThe basic construction and operation of this sensorare the same as in the 1AZ-FE and 2AZ-FE engines.For details, see page EG-40.CrankshaftPosition Sensor(Rotor Teeth)Pick-up Coil Type(36-2)1This sensor detects the engine speed and performs thecylinder identification.Intake VVT SensorLH, RH(Rotor Teeth)MRE Type(3)2 This sensor performs the cylinder identification.Exhaust VVT SensorLH, RH(Rotor Teeth)MRE Type(3)2 This sensor performs the cylinder identification.Water TemperatureSensorThermistor Type 1This sensor detects the engine coolant temperature bymeans of an internal thermistor.Intake AirTemperature SensorThermistor Type 1This sensor detects the intake air temperature by meansof an internal thermistor.Knock Sensor 1,2Built-inPiezoelectric Type(Flat Type)2This sensor detects an occurrence of the engineknocking indirectly from the vibration of the cylinderblock caused by the occurrence of engine knocking.ThrottlePosition SensorNo-contact Type 1DThis sensor detects the throttle valve opening angle.DThe basic construction and operation of this sensorare the same as in the 1AZ-FE and 2AZ-FE engines.For details, see page EG-43.Accelerator PedalPosition SensorNo-contact Type 1DThis sensor detects the amount of pedal effort appliedto the accelerator pedal.DThe basic construction and operation of this sensorare the same as in the 1AZ-FE and 2AZ-FE engines.For details, see page EG-42.Injector 12-Hole Type 6The injector is an electromagnetically-operated nozzlewhich injects fuel in accordance with signals from theengine ECU. ENGINE – 2GR-FE ENGINE285EG79EngineFrontTiming RotorCrankshaftPosition Sensor279EG50NE Signal Plate (720_ CA)10_ CA2 TeethMissing285EG83285EG82Intake VVT Sensor RHTiming RotorIntake VVT Sensor (Right Bank)Exhaust VVT Sensor RHTiming RotorExhaust VVT Sensor (Right Bank)EG-104Crankshaft Position SensorThe timing rotor of the crankshaft consists of 34 teeth, with 2 teeth missing. The crankshaft position sensoroutputs the crankshaft rotation signals every 10_, and the missing teeth are used to determine thetop-dead-center.Intake and Exhaust VVT Sensors1) GeneralThe MRE (Magnetic Resistance Element) type intake and exhaust VVT sensors are used. To detect thecamshaft position, a timing rotor that is secured to the camshaft in front of the VVT controller is usedto generate 6 (3 Hi Output, 3 Lo Output) pulses for every 2 revolutions of the crankshaft. [...]... timing rotor passes EG -1 0 6 " ENGINE – 2GR-FE ENGINE Wiring Diagram A VCV1 Intake VVT Sensor RH VV1+ Engine ECU VV1– Timing Rotor Intake VVT Sensor RH " 271EG160 MRE Type and Pick-up Coil Type Output Waveform Image Comparison A Engine Speed Engine Speed No Detecting Analog Output Digital Output Sensor Output MRE Type Sensor Output Pick-up Coil Type 232CH 41 EG -1 0 7 ENGINE – 2GR-FE ENGINE Knock Sensor...EG -1 0 5 ENGINE – 2GR-FE ENGINE " Sensor Output Waveforms A VVT Sensor Signal Plate (720_ CA) 60_ CA 0V 18 0_ CA 12 0_ CA VVT Sensor 18 0_ CA 12 0_ CA 60_ CA 360_ CA 360_ CA EG Crankshaft Position Sensor 0V 10 _ CA 285EG84 2) MRE Type VVT Sensor D The MRE type VVT sensor consists of an MRE, a magnet and a sensor The direction of the magnetic field changes due to the different shapes (protruded and non-protruded... valve timing Engine ECU Crankshaft Position Sensor Target Valve Timing Duty-cycle Control Air Flow Meter Throttle Position Sensor Water Temp Sensor Intake and Exhaust VVT Sensors Camshaft Timing Oil Control Valve Feedback Correction Actual Valve Timing Vehicle Speed Signal 221EG16 EG -1 1 1 ENGINE – 2GR-FE ENGINE Effectiveness of the VVT-i System Operation State Objective TDC Earliest Timing (EX) During Idling... Stop 271EG93 Lock Pin " Exhaust Side VVT-i Controller A Sprocket Housing Lock Pin Exhaust Camshaft Vane (Fixed on Exhaust Camshaft) Advanced angle assist spring 281EG47 EG -1 1 3 ENGINE – 2GR-FE ENGINE 2) Camshaft Timing Oil Control Valve This camshaft timing oil control valve controls the spool valve using duty-cycle control from the engine ECU This allows hydraulic pressure to be applied to the VVT-i controller... shortened and peak intake efficiency is shifted to the low-to-high engine speed range, thus providing greater output at low-to-high engine speeds Control Valve Open Intake Air Control Valve (Open) Open Throttle Valve Close : Effective Intake Manifold Length Low High Engine Speed : Effective Intake Air Chamber Length 285EG66 EG -1 1 8 ENGINE – 2GR-FE ENGINE 9 Air Intake Control System General The system... cruising at a fixed speed control, and acceleration cruising control To make these controls possible, the engine ECU controls the throttle valve EG -1 1 0 ENGINE – 2GR-FE ENGINE 7 Dual VVT-i (Variable Valve Timing-intelligent) System General D The dual VVT-i system is designed to control the intake and exhaust camshafts within a range of 40_ and 35_ respectively (of Crankshaft Angle) to provide valve... position " Intake Camshaft Timing Oil Control Valve A To VVT-i Controller (Advance Side) * To VVT-i Controller (Retard Side) * EG Sleeve Spring Drain Drain Oil Pressure Spool Valve Coil Plunger 238EG62 *: The advance and retard sides of the exhaust side oil control valve are reverse of the intake side EG -1 1 4 ENGINE – 2GR-FE ENGINE Operation 1) Advance When the camshaft timing oil control valve is positioned... Cruise Control*2 *1: Only for models with cruise control system (conventional or dynamic radar type) *2: Only for models with cruise control system (dynamic radar type) 01YEG11Y EG -1 0 9 ENGINE – 2GR-FE ENGINE 2) Normal Throttle Control (non-linear control) Controls the throttle to an optimal throttle valve angle that is appropriate for the driving condition such as the amount of the accelerator pedal effort... Crankshaft Position Sensor Combination Meter Vehicle Speed Signal A/C ECU D A / C ON / OFF Condition Signal D A / C Refrigerant Pressure Signal CAN (CAN No .1 Bus) Engine ECU Fan Motor No .1 Cooling Fan ECU Fan Motor No.2 01YEG14TE EG -1 2 0 ENGINE – 2GR-FE ENGINE Operation D The engine ECU controls the cooling fan speed in accordance with the value of the engine coolant temperature, as shown in the graph... depending on whether the engine speed is at low speeds and below or more Fan Speed (Control Voltage) At Low Speeds or Below More than Low Speeds Air Conditioner Refrigerant Pressure 025EG15TE ENGINE – 2GR-FE ENGINE EG -1 2 1 11 Diagnosis D When the engine ECU detects a malfunction, the engine ECU makes a diagnosis and memorizes the failed section Furthermore, the check engine warning light in the combination . SignalVGTHANE+THWVPAVPA2VTA1VTA2KNK1KNK2VCV1+VCV2+VCE1VCE2STPSPDEngineECU #10 #20 #30 #40#50#60IGT1 XIGT6IGF1M+OC1+OC2+OE1+OE2–ACISEFINo .1 INJECTORNo.2 INJECTORNo .3 INJECTORNo.4. VCrankshaftPositionSensor0 VVVT Sensor Signal Plate (720_ CA )18 0_ CA60_ CA60_ CA180_ CA 12 0_ CA120_ CA360_ CA360_ CA10_ CAEG -1 0 5" Sensor Output Waveforms A2) MRE Type