2006 TOYOTA RAV4 Camshaft sensor

ENGINE - 2AZ-FE ENGINE
181EG11
VVT-i ControllerIntake CamshaftTiming Rotor
Exhaust Camshaft
Timing Sprocket
185EG25 181EG14
Cam Spring
Cam
Plunger
SpringChain
Te n s i o n e r
Chain Damper
Oil Jet
Chain TensionerChain SlipperEG-13
2. Camshaft
The intake camshaft is provided with timing rotor to trigger the camshaft position sensor.
In conjunction with the adoption of the VVT-i system, an oil passage is provided in the intake camshaft
in order to supply engine oil pressure to the VVT-i system.
A VVT-i controller has been installed on the front of the intake camshaft to vary the timing of the intake
valves.
3. Timing Chain
A roller chain with an 8 mm (0.315 in.) pitch is used to make the engine more compact.
The timing chain is lubricated by an oil jet.
The chain tensioner uses a spring and oil pressure to maintain proper chain tension at all times.
The chain tensioner suppresses noise generated by the timing chain.
A ratchet type non-return mechanism is used.
To achieve excellent serviceability, the chain tensioner is constructed so that it can be removed and
installed from the outside of the timing chain cover.

ENGINE - 2AZ-FE ENGINE
165EG25
Camshaft
Position
Sensor
Crankshaft
Position
Sensor
Va r i o u s
SensorG2
NE
ECMIGT1
IGT2
IGT3
IGT4
IGF+BIgnition Coil
(with Igniter)
No.1 Cylinder
No.2 Cylinder
No.3 Cylinder
No.4 Cylinder
185EG38
0.7 mm
(0.028 in.)
Iridium Tip EG-24
IGNITION SYSTEM
1. General
A DIS (Direct Ignition System) is used. The DIS improves the ignition timing accuracy, reduces
high-voltage loss, and enhances the overall reliability of the ignition system by eliminating the distributor.
The DIS in this engine is an independent ignition system which has one ignition coil (with igniter) for each
cylinder.
Iridium-tipped spark plugs are used.
2. Spark Plug
Iridium-tipped spark plugs are used to improve ignition performance while maintaining the same durability
of the platinum-tipped spark plugs.
Specifications
DENSOSK20R11
NGKIFR6A11
Plug Gap1.0 - 1.1 mm
(0.039 - 0.043 in.)

ENGINE - 2AZ-FE ENGINE EG-30
ENGINE CONTROL SYSTEM
1. General
The engine control system for the 2AZ-FE engine has the following systems.
System
Outline
SFI
Sequential Multiport
Fuel InjectionAn L-type SFI system directly detects the intake air volume with a hot-wire
type mass air flow meter.
The fuel injection system is a sequential multiport fuel injection system.
ESA
Electronic Spark
AdvanceIgnition timing is determined by the ECM based on signals from various sensors.
The ECM corrects ignition timing in response to engine knocking.
ETCS-i
Electronic
Optimally controls the throttle valve opening in accordance with the amount of
accelerator pedal effort and the condition of the engine and the vehicle.
Electronic
Throttle Control
System-intelligent
(See page-43)A linkless-type is used, without an accelerator cable.
An accelerator pedal position sensor is provided on the accelerator pedal.
A non-contact type throttle position sensor and accelerator pedal position
sensor are used.
VVT-i
Va r i a b l e Va l v e
Timing-intelligent
(See page EG-48)
Controls the intake camshaft to an optimal valve timing in accordance with the
engine condition.
Air-fuel Ratio
Sensor, Oxygen
Sensor Heater
ControlMaintains the temperature of the air-fuel ratio sensor or oxygen sensor at an
appropriate level to realize accuracy of detection of the oxygen concentration in
the exhaust gas.
Air Conditioning
Cut-off ControlBy turning the air conditioning compressor ON or OFF in accordance with the
engine condition, drivability is maintained.
Cooling Fan Control
(See page EG-52)Radiator cooling fan operation is controlled by signals from ECM based on the
engine coolant temperature sensor signal and the condition of the air
conditioning operation.
Fuel Pump Control
(See page EG-53)Fuel pump operation is controlled by signal from the ECM.
The fuel pump is stopped when the SRS driver’s and front passenger’s airbags
are deployed.
Evapotative Emission
The ECM controls the purge flow of evaporative emissions (HC) in the canister
in accordance with engine conditions.
Evapotative Emission
Control
(See page EG-54)Approximately five hours after the ignition switch has been turned OFF, the
ECM operates the canister pump module to detect any evaporative emission
leakage occurring in the EVAP (evaporative emission) control system through
changes in the 0.02 in. leak pressure.
Charging Control
(See page EG-65)The ECM regulates the charging voltage of the generator in accordance with the
driving conditions and the charging state of the battery.
(Continued)

ENGINE - 2AZ-FE ENGINE
01MEG04Y
SENSORSACTUATORS
MASS AIR FLOW METER
INTAKE AIR TEMPERATURE
SENSOR
ENGIEN COOLANT
TEMPERATURE SENSOR
THROTTLE POSITION
SENSOR
CRANKSHAFT POSITION
SENSOR
CAMSHAFT POSITION
SENSOR
ACCELERATOR PEDAL
POSITION SENSOR
AIR-FUEL RATIO SENSOR
(Bank 1, Sensor 1)
HEATED OXYGEN SENSOR
(Bank 1, Sensor 2)
KNOCK SENSOR
COMBINATION METER
Vehicle Speed Signal
IGNITION SWITCH
Ignition Signal
Starter Signal
PA R K / N E U T R A L P O S I T I O N
SWITCH
TRANSMISSION CONTROL
SWITCH
CRUISE CONTROL SWITCHVG
THA
THW
VTA1
VTA2
NE
G2
VPA
VPA2
A1A
OX1B
KNK1
SPD
IGSW
STA
D, 2, L
R, P, N
3
CCSECM#10
#20
#30
#40
IGT1 IGT4
IGF1
M
OC1
FC
HA1A
HT1BSFI
No.1 INJECTOR
No.2 INJECTOR
No.3 INJECTOR
No.4 INJECTOR
ESA
IGNITION COIL
with IGNITER
SPARK PLUGS
ETCS-i
THROTTLE CONTROL
MOTOR
VVT-i
CAMSHAFT TIMING OIL
CONTROL VALVE
FUEL PUMP CONTROL
CIRCUIT OPENING
RELAY
AIR-FUEL RATIO AND
HEATED OXYGEN SENSOR
HEATER CONTROL
AIR-FUEL RATIO SENSOR
HEATER (Bank1, Sensor1)
HEATED OXYGEN SENSOR
HEATER (Bank1, Sensor2)
EG-32
2. Construction
The configuration of the engine control system in the 2AZ-FE engine is shown in the following chart.
(Continued)

ENGINE - 2AZ-FE ENGINE
01MEG09Y
Accelerator Pedal
Position Sensor
Generator
MIL
DLC3Park / Neutral
Position Switch
Ignition
Switch
Circuit Opening RelayECM
Battery
Throttle
Position
Sensor
Throttle
Control
Motor
Purge VSVMass Air Flow Meter
Intake Air Temperature
Sensor
Camshaft Position
Sensor
Camshaft
Timing
Oil Control
Va l v e
Ignition Coil
with Igniter
Injector
Knock Sensor
Engine
Coolant
Temperature
Sensor
Crankshaft Position
Sensor
Canister
Filter
Fuel Pump
Canister Pump Module
Ve n t Va l v e
Leak Detection Pump
Canister Pressure SensorTWCs
Heated Oxygen Sensor
(Bank 1, Sensor 2)
Air-fuel Ratio Sensor
(Bank 1, Sensor 1) EG-34
3. Engine Control System Diagram

ENGINE - 2AZ-FE ENGINE
01MEG31Y
DLC3
Accelerator Pedal
Position Sensor
Mass Air Flow Meter
(Built-in Intake Air
Temperature Sensor)
VSV (for EVAP)
Battery Current
Sensor
Fuel Pump
Canister Pump Module
Ve n t Va l v e
Leak Detection Pump
Canister Pressure Sensor
ECM
Heated Oxygen Sensor
(Bank 1, Sensor 2) Air Fuel Ratio Sensor
(Bank 1, Sensor 1)
Camshaft Timing
Oil Control ValveInjectorKnock Sensor
Ignition Coil with Igniter
Throttle Position
Sensor
Camshaft Position
Sensor
Water Temperature
Sensor
Crakshaft Position
SensorEG-35
4. Layout of Main Components

ENGINE - 2AZ-FE ENGINE EG-36
5. Main Components of Engine Control System
General
The main components of the 2AZ-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
Camshaft Position Sensor (Rotor Teeth)Pick-up Coil Type (3)1
Throttle Position SensorNon-contact Type1
Accelerator Pedal Position SensorNon-contact Type1
Knock SensorBuilt-in Piezoelectric Element Type
(Flat Type)1
Air-fuel Ratio Sensor
(Bank 1, Sensor 1)Type with Heater
(Planar Type)1
Heated Oxygen Sensor
(Bank 1, Sensor 2)Type with Heater
(Cup Type)1
Injector12-hole Type4
ECM
The 32-bit CPU of the ECM is used to increase the speed for processing the signals.

ENGINE - 2AZ-FE ENGINE
DR011EG25
Camshaft Position Sensor
Engine Coolant
Temperature Sensor
Crankshaft
Position Sensor
Camshaft Timing
Oil Control Valve
Throttle Position
Sensor
ECM
Mass Air Flow Meter Vehicle Speed Signal
221EG16
Crankshaft Position Sensor
Mass Air Flow Meter
Throttle Position Sensor
Engine Coolant Temp. Sensor
Camshaft Position Sensor
Vehicle Speed SignalECM
Target Valve Timing
Feedback
Correction
Actual Valve Timing
Duty-cycle
Control
Camshaft Timing
Oil Control Valve
EG-48
7. VVT-i (Variable Valve Timing-intelligent) System
General
The VVT-i system is designed to control the intake camshaft within a range of 40 (of Crankshaft Angle)
to provide valve timing that is optimally suited to the engine condition. This realizes proper torque in
all the speed ranges as well as realizing excellent fuel economy, and reducing exhaust emissions.
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 can calculate 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 crankshaft position sensor to detect the actual valve timing,
thus providing feedback control to achieve the target valve timing.