Page 102 of 2000

ENGINE - 2GR-FE ENGINE
01MEG29Y
Ignition SwitchCombination Meter
Vehicle Speed Signal
MIL
Battery Current Sensor
(Built-in Battery
Temperature Sensor)
Park / Neutral
Position Switch
Battery
Generator
Fuel Pump Relay
Fuel Pump
Vent Valve
Circuit Opening
RelayDLC3*1*2*3
CAN
ECM
Cruise Control Switch
Accelerator Pedal
Position Sensor
Stop Light Switch
Canister
Pressure
SensorLeak
Detection
Pump
Intake Air
Temp. Sensor
VSV (For
Air Intake
Control)Mass Air
Flow Meter
AirThrottle Position
Sensor
Purge VSV
Throttle
Control
Motor
*4*5
Fan
Motor No. 1Fan
Motor
No. 2
Cooling
Fan
ECUCooling
Fan
ECU
No. 1Cooling
Fan
ECU
No. 2
Fan Motor No. 1
Fan Motor No. 2
ACIS Actuator
Intake Camshaft Timing
Oil Control Valve (Bank 2)Injector Injector
Intake Camshaft Timing
Oil Control Valve (Bank 1)
Intake VVT Sensor (Bank 1)
Ignition Coil With Igniter
Exhaust VVT Sensor (Bank 1)
Exhaust Camshaft Timing
Oil Control Valve (Bank 1)
Air-fuel Ratio Sensor
(Bank1, Sensor1)
TWC
Knock
Sensor
Intake VVT
Sensor (Bank 2)
Exhaust VVT
Sensor (Bank 2)
Air-fuel Ratio Sensor
(Bank2, Sensor1)Exhaust Camshaft
Timing Oil Control
Valve (Bank 2)
Crankshaft Position
Sensor
Engine Coolant
Temperature Sensor Heated Oxygen Sensor
(Bank1, Sensor2)Heated Oxygen Sensor
(Bank2, Sensor2)TWCTWC
EG-106
3. Engine Control System Diagram
*1: Air Conditioning ECU
*
2: Airbag Sensor Assembly
*
3: Skid Control ECU
*
4: Except Towing Package Models
*
5: Towing Package Models
Page 104 of 2000
ENGINE - 2GR-FE ENGINE
01MEG27Y
01MEG28Y
Intake Camshaft Timing Oil Control Valve (Bank 2)
Ignition Coil with Igniter
Injector
Intake VVT Sensor
(Bank 2)
Exhaust Camshaft
Timing Oil Control
Valve (Bank 2)
Crankshaft
Position Sensor
Exhaust VVT Sensor
(Bank 2)Air-fuel Ratio
Sensor
(Bank 2, Sensor 1)Engine Coolant
Temperature SensorIntake Camshaft Timing Oil Control
Valve (Bank 1)
Intake VVT
Sensor (Bank 1)
Exhaust VVT Sensor
(Bank 1)
Exhaust Camshaft
Timing Oil Control
Valve (Bank 1)
Air-fuel Ratio Sensor
(Bank 1, Sensor 1)
ACIS ActuatorThrottle Position Sensor
Knock Sensor (Bank 1)
Knock Sensor (Bank 2) EG-108
Page 105 of 2000
ENGINE - 2GR-FE ENGINEEG-109
5. Main Components of Engine Control System
General
The main components of the 2GR-FE engine control system are as follows:
Component
OutlineQuantity
ECM32-bit CPU1
Mass Air Flow MeterHot-wire Type1
Crankshaft Position Sensor (Rotor Teeth)Pick-up Coil Type (36 - 2)1
Intake VVT Sensor (Rotor Teeth)MRE (Magnetic Resistance Element)
Ty p e ( 3 )2
Exhaust VVT Sensor (Rotor Teeth)MRE (Magnetic Resistance Element)
Ty p e ( 3 )2
Accelerator Pedal Position SensorNon-contact Type1
Throttle Position SensorNon-contact Type1
Knock SensorBuilt-in Piezoelectric Type
(Non-resonant Type / Flat Type)2
Air fuel Ratio Sensor(Bank 1, Sensor 1)Type with Heater (Planar Type)1 eachAir-fuel Ratio Sensor(Bank 2, Sensor 1)Type with Heater (Planar Type)1 each
Heated Oxygen (Bank 1, Sensor 2)Type with Heater (Cup Type)1 eachHeated Oxygen
Sensor
(Bank 2, Sensor 2)Type with Heater (Cup Type)1 each
Injector12-hole Type6
Page 106 of 2000
ENGINE - 2GR-FE ENGINE
285EG79
279EG50
Engine
Front
Timing RotorCrankshaft
Position Sensor
Timing Rotor (720
CA)
10
CA
2 Teeth
Missing EG-110
Mass Air Flow Meter
The 2GR-FE engine uses the same mass air flow meter as the 2AZ-FE engine. For details, see page EG-38.
Crankshaft Position Sensor
The timing rotor of the crankshaft consists of 34 teeth, with 2 teeth missing. The crankshaft position sensor
outputs the crankshaft rotation signals every 10
, and the missing teeth are used to determine the
top-dead-center.
Page 107 of 2000
ENGINE - 2GR-FE ENGINE
285EG82285EG83
Intake VVT Sensor (Bank 1)
Timing Rotor
RH BankTiming RotorExhaust VVT Sensor (Bank 1)
RH Bank
285EG84
VVT Sensor Signal Plate (720 CA)
VVT
Sensor
0 V
Crankshaft
Position
Sensor
0 V180
CA 60 CA
60 CA180 CA 120 CA120
CA
360
CA 360 CA
10
CAE G - 111
Intake and Exhaust VVT Sensors
1) General
The MRE (Magnetic Resistance Element) type intake and exhaust VVT sensors are used. To detect the
camshaft position, a timing rotor that is secured to the camshaft in front of the VVT controller is used
to generate 6 (3 Hi Output, 3 Lo Output) pulses for every 2 revolutions of the crankshaft.
Sensor Output Waveforms
Page 113 of 2000

ENGINE - 2GR-FE ENGINE
238EG70
Synchronous Injection
IgnitionNon-synchronous Injection
Crankshaft Angle # 1
# 2
# 3
# 4
# 5
# 6
0
120240360480600720
Independent InjectionEG-117
Air-fuel Ratio Sensor and Heated Oxygen Sensor
The planar type air-fuel ratio sensor and the cup type heated oxygen sensor are used. For details, see page
EG-37.
6. SFI (Sequential Multiport Fuel Injection) System
An L-type SFI system directly detects the intake air mass with a hot wire type mass air flow meter.
An independent injection system (in which fuel is injected once into each cylinder for each two revolution
of the crankshaft) is used.
There are two (synchronous and non-synchronous) injections:
a) The synchronous injection in which corrections based on the signals from the sensors are added to the
basic injection time so that injection occurs always at the same position.
b) The non-synchronous injection in which injection is effected by detecting the requests from the signals
of the sensors regardless of the crankshaft angle.
Furthermore, to protect the engine and achieve lower fuel consumption, the system uses a fuel cutoff in
which the injection of fuel is stopped temporarily in accordance with the driving conditions.
This system performs group injection when the engine coolant temperature is extremely low and the
engine is operating at a low speed.
7. ESA (Electronic Spark Advance) System
This system selects the optimal ignition timing in accordance with the signals received from the sensors and
sends the (IGT) ignition signal to the igniter.
Page 116 of 2000

ENGINE - 2GR-FE ENGINE
285EG57
Exhaust Camshaft Timing OCV* (Bank 1)
Intake Camshaft Timing OCV* (Bank 1)
Exhaust VVT Sensor (Bank 1)
Engine Coolant Temperature Sensor
Intake Camshaft
Timing OCV* (Bank 2)
Exhaust VVT
Sensor (Bank 2)
Exhaust Camshaft
Timing OCV*
(Bank 2)
Intake VVT Sensor (Bank 2)
Crankshaft Position Sensor
Intake VVT Sensor (Bank 1)ECM
Mass Air Flow MeterThrottle Position Sensor
221EG16
Crankshaft Position Sensor
Mass Air Flow Meter
Throttle Position Sensor
Engine Coolant Temp. Sensor
Intake and Exhaust VVT Sensors
Vehicle Speed SignalECM
Ta r g e t Va l v e Ti m i n g
Feedback
Correction
Actual Valve Timing
Duty-cycle
Control
Camshaft Timing
Oil Control Valve
EG-120
9. Dual VVT-i (Variable Valve Timing-intelligent) System
General
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 timing that is optimally suited to the engine
condition. This improves torque in all the speed ranges as well as increasing fuel economy, and reducing
exhaust emissions.
*: Oil Control Valve
Using the engine speed signal, vehicle speed signal, and the signals from mass air flow meter, throttle
position sensor and engine coolant temperature sensor, the ECM calculates optimal valve timing for each
driving condition and controls the camshaft timing oil control valve. In addition, the ECM uses signals
from the camshaft position sensor and the crankshaft position sensor to detect the actual valve timing,
thus providing feedback control to achieve the target valve timing.
Page 125 of 2000

ENGINE - 2GR-FE ENGINE
01MEG21Y
01MEG22Y
Engine Coolant Temperature
Sensor
Crankshaft Position Sensor
Combination Meter
Vehicle Speed SignalECM
CAN
Air Conditioning ECUCooling
Fan
ECUFan Motor
No. 1
Fan Motor
No. 2
Except Towing Package Models
Towing Package Models Engine Coolant Temperature
Sensor
Crankshaft Position Sensor
Combination Meter
Vehicle Speed SignalECM
CAN
Air Conditioning ECUCooling
Fan
ECU
No. 1
Cooling
Fan
ECU
No. 2Fan Motor
No. 1
Fan Motor
No. 2EG-129
12. Cooling Fan Control System
General
A cooling fan control system is used. To achieve an optimal fan speed in accordance with the engine coolant
temperature, vehicle speed, engine speed, and air conditioning operating conditions, the ECM calculates
the proper fan speed and sends the signals to the front controller. By receiving the signals from the ECM,
the front controller sends proper fan speed control signals to the cooling fan ECU.
Upon receiving the signals from the front controller, the cooling fan ECU actuates the fan motors.
Wiring Diagram