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ENGINE

2GR-FSE ENGINE CONTROL SYSTEMEG–16

EG

2GR-FSE ENGINE CONTROL SYSTEM

Engine Control System Description● This engine uses a Toyota Computer Controlled System (TCCS), which comprehensively controls the following systems in a highly accu-

rate manner: Sequential Multiport Fuel Injection (SFI), Electronic Spark Advance (ESA), Electronic Throttle Control System-intelligent

(ETCS-i), and Dual Variable Valve Timing-intelligent (Dual VVT-i). As a result, high performance, high power output, fuel economy, and

improved exhaust emission performance have been achieved.

● A new D-4S (Direct injection 4-stroke gasoline engine Superior version) system with a direct injection fuel injection system and a port

injection system is used. In this system, the ECM effects centralized control on the direct injection fuel injectors and the port injection fuel

injectors to achieve an optimal state of combustion that suits the driving conditions, in order to realize fuel economy, exhaust emission

performance improvement, and a high power output in the practical range.

● This system provides diagnosis and failsafe functions for serviceability and safety.

ENGINE

2GR-FSE ENGINE CONTROL SYSTEM EG–17

EG

EDU

Air Fuel Ratio SensorFuel Pump (High Pressure)

Engine Coolant Temp.Sensor

Knock Sensor (Flat Type)

Fuel Pressure Sensor

Heated Oxygen Sensor

ECM

Mass Air Flow Meter

Electronically Controlled Throttle Body

Injector (Direct Injection)

Injector (Port Injection)

Cooling Fan ECU

VSV (For EVAP)

Fuel Pump (Low Pressure)

Oil Level Sensor

Charcoal Canister

Accelerator Pedal

Position Sensor

Intake Camshaft

Timing OCV

Camshaft Position

Sensor (Exhaust)Intake Camshaft

Timing OCV

Exhaust Camshaft

Timing OCV

Camshaft Position

Sensor (Intake)

Camshaft Position

Sensor (Intake)

Exhaust Camshaft

Timing OCVCrankshaft

Position Sensor

Ignition coils

with built-in igniters

Camshaft Position

Sensor (Exhaust)

A4270447P

ENGINE


EG

Engine Control System Diagram

EDU

TWCs

Resonator

TWCs

Charcoal CanisterAir Filter

Pump Module

Vacuum PumpPressure Sensor

Canister Vent Valve

Fuel Pump



Crankshaft Position Sensor

Air Cleaner

*1*4*4

*5

*3

*2*2*7

*7

*8

*9

1:Ignition Coil with Igniter

2:Intake Camshaft Timing Oil Control Valve

3:Exhaust Camshaft Timing Oil Control Valve

4:Camshaft Position Sensor (Intake)

5:Camshaft Position Sensor (Exhaust)

6:Fuel Pump (High Pressure)7:Injector (For Port Injection)

*5

*3

*1

*6

ECM

Mass Air

Flow Meter

Intake Air

Temp.Sensor

Throttle

Position

Sensor

Electronically

Controlled

Throttle Motor

VSV(For

EVAP

Valve)

Accelerator

Pedal Position

Sensor

Spill

Control

Valve

Air Fuel

Ratio

Sensor

Knock

Sensor

Injector (For

Direct Injection)

8:Fuel Pressure Sensor9:Engine Coolant Temp.Sensor

:Fuel Line

Air Fuel

Ratio Sensor

Fuel Pump

Resister

A4270448P

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Construction

Mass Airflow Meter (with Built-in

Intake Temperature Sensor)

Intake Camshaft Position Sensor 2

Power Supply ECU

Combination Meter

Engine Switch Signal (IG2 relay)

Starter Signal (starter relay)

Exhaust Camshaft Position Sensor 2

Canister Purge VSV

Fuel Tank Pressure Pump Actuation

Cooling Fan ECU

A/C Magnetic Clutch Relay

Fuel Pump Relay

Circuit Opening Relay

Battery

Alternator

Neutral Start Switch

Tank Internal Pressure Sensor

Port Injection Fuel Injector 6

Injector Relay

Air Conditioner Lock Sensor

Rear Window Defogger Relay

ID Code Box

Cruise Control Switch

Crankshaft Position Sensor

Heated Oxygen Sensor 2

Air Fuel Ratio Sensor 2

Throttle Position Sensor

Accelerator Pedal Position Sensor

EDU

ECM

CAN

Engine Coolant Temp Sensor

Flat Knock Sensor 2

Fuel Pressure Sensor

Stop Light Switch

Out Side Air Temp Sensor

Engine Oil Pressure Switch

Engine Oil Level Sensor

Main Relay

Starter Relay

Data Link Connector 3

Analog/Digital

Converter

SFI

ECT

CPU

Constant

Voltage Power

Supply

Communication

Integrated Circuit

(IC)

Direct Injection

Fuel Injector x 6Solenoid Spill

Valve

Intake Camshaft Timing

Oil Control Valve 2

Exhaust Camshaft Timing

Oil Control Valve 2

Electronically Controlled

Throttle Motor

Heated Oxygen

Sensor Heater 2

Air Fuel Ratio

Sensor Heater 2

A4270449P

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Control List

■ Service Tip ■

The uses the CAN protocol for diagnostic communication. Therefore, a hand-held tester and a dedicated adapter [CAN VIM (Vehicle

Interface Module)] are required for accessing diagnostic data. For details, see the 2007 LEXUS GS430/350 Repair Manual.

System Outline

D-4S SFI (Sequential Multi-port Fuel Injection)

The ECM provides appropriate fuel injection by adding corrections, which are based on the signals pro-vided by various sensors, to the basic injection time that is calculated in accordance with the conditionsof the engine.

ESA (Electronic SparkAdvance)

The ECM provides appropriate ignition by adding corrections, which are based on the signals providedby various sensors, to the basic injection time that is calculated in accordance with the conditions of theengine.

ETCS-i (Electronic ThrottleControl System-intelligent)

The ECM effects appropriate throttle position control by adding corrections, which are based on the sig-nals provided by various sensors, to the throttle position that is calculated in accordance with the condi-tions of the engine.

Dual VVT-i (Variable ValveTiming-intelligent)

The ECM controls the intake and exhaust valves to optimal timing in accordance with the conditions ofthe engine.

Cooling Fan Control The ECM step lessly controls the speed of the electric cooling fan by sending signals to the cooling fanECU in accordance with the driving conditions of the vehicle.

High-Pressure Fuel PumpControl

The ECM controls the discharge pressure of the high-pressure fuel pump in accordance with the condi-tions of the engine.

Fuel Pump ControlThe ECM turns the fuel pump ON and OFF based on the starter signal and engine speed signal. TheECM stops the operation of the fuel pump based on the signal output by the airbag ECU.

Starter Control (CrankingHold Function)

The ECM continues to supply current to the starter via the starter relay until the engine starts, based onthe start signal output by the engine switch.

Air-Fuel Ratio SensorHeater Control

The ECM turns the air-fuel ratio sensor heater ON and OFF in accordance with the coolant temperatureand driving conditions.

Oxygen Sensor Heater Con-trol

The ECM turns the oxygen sensor heater ON and OFF in accordance with the coolant temperature anddriving conditions.

Evaporative Emission Con-trol

The ECM controls the purge flow of evaporative emissions (HC) in the charcoal canister in accordancewith engine conditions.

Air Conditioning ControlAfter effecting idle-up control, the ECM turns the air conditioning magnetic clutch ON and OFF torestrain the speed fluctuations during idling. It momentarily turns OFF the magnetic clutch during accel-eration.

Function to communicatewith multiplex communica-tion system

Communicates with the meter ECU, A/C ECU, etc., on the body side, to input/output necessary signals.

DiagnosisEnables the accurate and detailed diagnosis of malfunctions through the use of the hand-held testerdiagnostic tool to access the SAE-prescribed DTC (Diagnostic Trouble Code) and data, as well as toperform active tests.

Fail-SafeIf a failure occurs in the sensor signals, the ECM uses the standard values stored within the ECM to con-tinue effecting control or stop the engine.

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Sensor List

Actuator List

Name Function and Construction SFI ESA ISC VVT-i

Mass Air Flow Meter Uses a hot wire to detect the intake air volume. ❍ ❍ ❍ ❍

Intake Air Temperature Sensor Detects the intake air temperature. ❍ ❍ ❍ ❍

Camshaft Position Sensor Identifies the cylinder and detects the camshaft position. ❍ ❍ ❍ ❍

Crankshaft Position Sensor Detects the crankshaft position and engine speed. ❍ ❍ ❍ ❍

Accelerator Pedal Position Sen-sor

It is mounted on the accelerator pedal to detect the accelerator pedalposition.

❍ ❍ ❍ ❍

Throttle Position Sensor Detects the throttle valve position. ❍ ❍ ❍ ❍

Engine Collant Temp.Sensor Detects the engine coolant temperature. ❍ ❍ ❍ ❍

Fuel Pressure Sensor It is mounted on the fuel delivery pipe to detect the fuel pressure. ❍

Air-Fuel Ratio Sensor Detects the air-fuel ratio in the exhaust gas. ❍

Heated Oxygen Sensor Detects the oxygen concentration in the exhaust gas. ❍

Ignition Coil (with Igniter) Sends an ignition check signal. ❍

Starter SignalSends the starter voltage at the time the engine is started in the formof a signal.

❍ ❍ ❍ ❍

Park/Neutral Position Switch Detects the P, N, and D positions of the automatic transmission. ❍ ❍ ❍ ❍

Knock SensorConverts the pressure that acts on the piezoelectric element into avoltage signal in order to detect knocking.

❍

Vehicle Speed Signal Detects the vehicle speed. ❍ ❍ ❍ ❍

Name Function and Construction

Main Relay Supplies the main power to the SFI and ESA systems.

Circuit Opening Relay Supplies power to the fuel pump system.

High-Pressure Fuel Pump Pressurizes the fuel.

Fuel InjectorTwo types of fuel injectors are provided for direct injection and port injection. They inject fuel atoptimal timing and volume.

Air-Fuel Ratio Sensor Heater Heats the air-fuel ratio sensor to accelerate feedback control when the engine is cold.

Heated Oxygen Sensor Heater Heats the oxygen sensor to accelerate feedback control when the engine is cold.

Ignition Coil (with Igniter) Turns the current of the ignition coil ON and OFF at optimal timing.

Electronically Controlled Throttle Motor

Controls the throttle valve position in accordance with driving conditions.

Intake Camshaft Timing OCV Control the phase of the intake camshaft at optimal valve timing.

Exhaust Camshaft Timing OCV Control the phase of the exhaust camshaft at optimal valve timing.

Evaporative Purging VSV Regulates the canister purge volume.

ENGINE


EGD-4S SFI (Sequential Multiport Fuel Injection) System

● This system uses an airflow meter to detect the intake air volume in order to control the fuel injection volume.

● To achieve an optimal state of combustion in accordance with the engine speed and load data provided by the signals from various sensors,

the ECM controls the injection volume and injection timing of the fuel injectors for both direct injection and port injection.

● To accelerate the warming up of the catalysts when the engine is started cold, the system effects lean-burn control through stratified com-

bustion.

Weak Stratification Combustion• Immediately after a cold engine is started, the port injection fuel injectors spray fuel between the expansion and intake strokes. Then,

during the latter half of the compression stroke, the direct injection fuel injectors spray fuel to stratify the mixture (with an air-fuel ratio

ranging from 15:1 to 16:1). This enables the engine to significantly retard its ignition timing. As a result, the exhaust gas temperature

rises, accelerating the warming up of the catalysts, and dramatically improving exhaust gas emission performance when the engine is

cold.

Homogeneous Combustion• To achieve an optimal state of combustion, the system uses both or either of the two types of fuel injectors for port injection and direct

injection, respectively. The port injection fuel injectors spray fuel between the expansion and intake strokes, while the direct injection

fuel injectors spray fuel during the first half of the intake stroke. This produces a homogenous mixture. In addition, the heat of evapora-

tion of the injected fuel cools the compressed air, which improves charging efficiency and increases power output.

EDU(Electronic Driver Unit)Converts the ECM signals (fuel injection request and high pressure fuel discharge volume con-trol) into high-voltage, high-amperage actuation signals in order to actuate the direct injectionfuel injectors and the solenoid spill valve.

Name Function and Construction

High

Torque

Direct Injection System

Engine Speed (rpm) High

Fuel injection system activation ranges

Direct Injection System

+

Port Injection System

A4320230P

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