2006 TOYOTA RAV4 oil pressure

ENGINE - 2GR-FE ENGINE
285EG20
Secondary Chain Tensioner
Primary Chain TensionerSecondary
Timing Chain
Idle Sprocket Secondary Chain
Te n s i o n e r
Secondary
Timing Chain Secondary Chain
Te n s i o n e r
Chain Damper
Timing Chain Oil Jet
Primary Timing Chain Chain
Slipper Ball
Ball
SpringMain Spring
Plunger
SpringPlunger
Cam
Cam Spring EG-82
3. Timing Chain and Chain Tensioner
Both the primary and secondary timing chains use roller chains with a pitch of 9.525 mm (0.375 in.).
The timing chain is lubricated by an oil jet.
The primary timing chain uses one chain tensioner, and each of the secondary timing chains for the right
and left banks uses one chain tensioner.
Both the primary and secondary chain tensioners use a spring and oil pressure to maintain proper chain
tension at all times. They suppress noise generated by the timing chains.
The primary chain tensioner is the ratchet type with a non-return mechanism.

ENGINE - 2GR-FE ENGINE
285EG21
Timing Chain Cover
Wa t e r P u m p G a s k e t
Wa t e r P u m pWater Pump Swirl
Chamber
Oil Pump
Housing
Oil Pump RotorsTiming Chain
Cover
Oil Pump Chamber
View from Front Side View from Back Side
285EG22
Oil
Passage
Check Ball
Check Ball
Spring
Plunger SpringPlunger
Roller Rocker ArmCam
Oil
Passage
Hydraulic
Lash Adjuster
Service Tip
Valve clearance adjustment is not necessary because a hydraulic lash adjuster is used in this model.
EG-83
4. Timing Chain Cover
The timing chain cover has an integrated construction consisting of the cooling system (water pump and
water passage) and the lubrication system (oil pump and oil passage). Thus, the number of parts has been
reduced to reduce weight.
5. Hydraulic Lash Adjuster
The hydraulic lash adjuster, which is located at the fulcrum of the roller rocker arm, consists primarily of
a plunger, plunger spring, check ball, and check ball spring.
The engine oil that is supplied by the cylinder head and the built-in spring actuates the hydraulic lash
adjuster. The oil pressure and the spring force that act on the plunger push the roller rocker arm against
the cam, in order to adjust the valve clearance that is created during the opening and closing of the valve.
As a result, engine noise is reduced.

ENGINE - 2GR-FE ENGINE
285EG24
Timing Chain Cover
Oil Pump
Housing
Oil Pump Rotors
(Cycloid Rotor)Crankshaft
To Cylinder
Block
From Oil
Filter
To
Oil FilterFrom
Oil Strainer
Oil passage in the oil pump
285EG25
Oil Jet Cross Section
Oil JetsCheck
Va l v eEngine Oil EG-86
2. Oil Pump
A compact cycloid rotor type oil pump directly driven by the crankshaft is used.
This oil pump has used an internal relief method which circulates relief oil to the suction passage in the
oil pump. This aims to minimize oil level change in the oil pan, reduce friction, and reduce air mixing rate
in the oil.
3. Oil Jet
Oil jets for cooling and lubricating the pistons have been provided in the cylinder block, in the center of
the right and left banks.
These oil jets contain a check valve to prevent oil from being fed when the oil pressure is low. This prevents
the overall oil pressure in the engine from dropping.

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
271EG93
Timing RotorHousingLock PinSprocket
Intake Camshaft
Vane (Fixed on Intake Camshaft)
Oil Pressure
In Operation At a Stop
Lock Pin
281EG47
Housing
Advanced Angle Assist SpringVane (Fixed on Exhaust Camshaft)Lock PinExhaust Camshaft Sprocket EG-122
Construction
1) VVT-i Controller
This controller consists of the housing driven by the timing chain and the vane coupled with the intake
and exhaust camshafts.
The intake side uses a VVT-i controller with 3 vanes, and the exhaust side uses one with 4 vanes.
When the engine stops, the intake side VVT-i controller is locked on the most retarded angle side by
the lock pin, and the exhaust side VVT-i controller is locked on the most advanced angle side. This
ensures excellent engine startability.
The oil pressure sent from the advance or retard side path at the intake and exhaust camshaft causes
rotation in the VVT-i controller vane circumferential direction to vary the intake valve timing
continuously.
An advanced angle assist spring is provided on the exhaust side VVT-i controller. This helps to apply
torque in the advanced angle direction so that the vane lock pin securely engages with the housing
when the engine stops.
Intake Side VVT-i Controller
Exhaust Side VVT-i Controller

ENGINE - 2GR-FE ENGINE
238EG62
To VVT-i Controller
(Advance Side) *To VVT-i Controller
(Retard Side) *
Sleeve
Spring
Drain
Oil PressureDrain
Spool ValveCoil
PlungerEG-123
2) Camshaft Timing Oil Control Valve
This camshaft timing oil control valve controls the spool valve using duty-cycle control from the ECM.
This allows hydraulic pressure to be applied to the VVT-i controller advance or retard side. When the
engine is stopped, the camshaft timing oil control valve is in the most retard position.
Intake Camshaft Timing Oil Control Valve
*: The advance and retard sides of the exhaust camshaft timing oil control valve are reverse of the intake
side.

ENGINE - 2GR-FE ENGINE
238EG63
Va n e
Rotational Direction
Oil Pressure
IN DrainECM
281EG48
Va n e
Rotational DirectionECM
Oil Pressure
IN Drain EG-124
Operation
1) Advance
When the camshaft timing oil control valve is positioned as illustrated below by the advance signals from
the ECM, the resultant oil pressure is applied to the timing advance side vane chamber to rotate the
camshaft in the timing advance direction.
Intake Side
Exhaust Side

ENGINE - 2GR-FE ENGINE
238EG64
Rotational Direction
Va n e
Drain INOil PressureECM
281EG49
Rotational Direction
Va n eECM
Drain INOil Pressure
EG-125
2) Retard
When the camshaft timing oil control valve is positioned as illustrated below by the retard signals from
the ECM, the resultant oil pressure is applied to the timing retard side vane chamber to rotate the camshaft
in the timing retard direction.
Intake Side
Exhaust Side
3) Hold
After reaching the target timing, the valve timing is held by keeping the camshaft timing oil control valve
in the neutral position unless the traveling state changes.
This adjusts the valve timing at the desired target position and prevents the engine oil from running out
when it is unnecessary.