2006 TOYOTA RAV4 engine coolant

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

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

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.

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.

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

ENGINE - 2GR-FE ENGINE
189EG14 189EG13
189EG16 189EG15
Fan
Speed
Engine Coolant TemperatureFan
Speed
Refrigerant Pressure
Fan
Speed
Engine SpeedFan
Speed
Vehicle Speed (A) Fan speed required by
engine coolant temperature(B) Fan speed required by
air conditioning
refrigerant pressure
(C) Fan speed required by
engine speed(D) Fan speed required by
vehicle speed EG-130
Operation
As illustrated below, the ECM determines the required fan speed by selecting the fastest fan speed from
among the following:
(A) Fan speed required by the engine coolant temperature
(B) Fan speed required by the air conditioning refrigerant pressure
(C) Fan speed required by the engine speed
(D) Fan speed required by the vehicle speed

ENGINE - 2GR-FE ENGINEEG-133
15. Fail-safe
When the ECM detects a malfunction, the ECM stops or controls the engine according to the date already
stored in the memory.
Fail-safe Chart
DTC No.Fail-safe OperationFail-safe Deactivation Conditions
P0031, P0032,
P0051, P0052ECM turns off air-fuel ratio sensor heater.Ignition switch OFF.
P0037, P0038,
P0057, P0058ECM turns off heated oxygen sensor heater.Ignition switch OFF.
P0100, P0102,
P0103Ignition timing is calculated from engine speed
and throttle angle.“Pass” condition detected.
P0110, P0112,
P0113Intake air temperature is fixed at 20C (68F).“Pass” condition detected.
P0115, P0117,
P0118Engine coolant temperature is fixed at 80C
(176
F).“Pass” condition detected.
P0120, P0121,
P0122, P0123,
P0220, P0222,
P0223, P0604,
P0606, P0607,
P0657, P2102,
P2103, P2111,
P2112, P2118,
P2119, P2135
If ETCS-i (Electronic Throttle Control
System-intelligent) has a malfunction, ECM
cuts off current to throttle control motor.
Throttle control valve returns to predetermined
opening angle (approximately 6.5
) by force of
return spring. ECM then adjusts engine output
by controlling fuel injection (intermittent
fuel-cut) and ignition timing in accordance with
accelerator pedal opening angel to enable
vehicle to continue driving at minimal speed. If
accelerator pedal is depressed firmly and
slowly, vehicle can be driven slowly. If
accelerator pedal is depressed quickly, vehicle
may speed up and slow down erratically.If “Pass” condition is detected and
then the ignition switch is turned
OFF, fail-safe operation will stop
and system will return to normal
operating conditions.
P0327, P0328,
P0332, P0333Max. timing retardation.Ignition switch OFF.
P0351, P0352,
P0353, P0354,
P0355, P0356
Fuel is cut.“Pass” condition detected.
P2120, P2121,
P2122, P2123,
P2125, P2127,
P2128, P2138
Accelerator pedal position sensor has two (main
and sub) sensor circuits. If a malfunction occurs
in either of sensor circuits, ECM detects
abnormal signal voltage difference between two
sensor circuits and switches into limp mode. In
limp mode, remaining circuit is used to calculate
accelerator pedal opening to allow vehicle to
continue driving. If both circuits malfunction,
ECM regards opening angle of accelerator pedal
to be fully closed. In this case, throttle valve will
remain closed as if engine is idling.
If “Pass” condition is detected and
then the ignition switch is turned
OFF, fail-safe operation will stop
and system will return to normal
operating conditions.

ENGINE - 2GR-FE ENGINEEG-69
Engine Specifications
No. of Cyls. & Arrangement6-cylinder, V Type
Valve Mechanism24-valve DOHC, Chain Drive (with Dual VVT-i)
Combustion ChamberPentroof-type
ManifoldsParallel-flow
Fuel SystemSFI
Ignition SystemDIS
Displacement cm3
(cu. in.)3456 (210.9)
Bore x Stroke mm (in.)94.0 x 83.0 (3.70 x 3.27)
Compression Ratio10.8 : 1
Max. Output (SAE-NET)*1201 kW @ 6200 rpm (269 HP @ 6200 rpm)
Max. Torque (SAE-NET)*1333 N.m @ 4700 rpm (247 ft.lbf @ 4700 rpm)
Intake ValveOpen-3 to 37 BTDC
Valve Timing
Intake ValveClose71 to 31 ABDCVa l v e T i m i n g
Exhaust ValveOpen60 to 25 BBDCExhaust ValveClose4 to 39 ATDC
Firing Order1 - 2 - 3 - 4 - 5 - 6
Octane Rating91 or higher
Engine Oil GradeILSAC multigrade engine oil
CaliforniaULEVII, SFTP
EmissionTailpipeExceptTier2 Bin5 SFTPEmission
Regulation
ppExcept
CaliforniaTier2-Bin5, SFTPg
EvaporativeLEVII, ORVR
Engine Service Mass*2 (Reference) kg (lb)163 (359)
*1: Maximum output and torque rating is determined by revised SAE J1349 standard.
*
2: Weight shows the figure with the oil and engine coolant fully filled.