TOYOTA RAV4 2006 Service Repair Manual

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.

ENGINE - 2GR-FE ENGINE
285EG58
Engine
Speed
ECM
ActuatorThrottle Opening Angle
Throttle Valve
Intake Air Control Valve
285EG64
Intake Air
Control Valve
Actuator EG-126
10. ACIS (Acoustic Control Induction System)
General
The ACIS consists of a bulkhead to divide the intake manifold into 2 stages, and an intake air control valve
in the bulkhead which opens and closes to vary the effective length of the intake manifold in accordance
with the engine speed and throttle valve opening angle. This increases the power output in all ranges from
low to high speed.
System Diagram
Construction
1) Intake Air Control Valve
The intake air control valve, which is
provided in the intake air chamber, opens and
closes to change the effective length of the
intake manifold in 2 stages.
2) Actuator (Motor)
The actuator activates the intake air control
valve based on signals from the ECM.

ENGINE - 2GR-FE ENGINE
285EG65
Intake Air Control Valve (Close)Intake Air Control Valve Close
Open
Throttle
Va l v e
Close
Low High
Engine Speed : Effective Intake Manifold Length
285EG66
Intake Air Control Valve (Open)Intake Air
Control Valve Open
Open
Throttle
Va l v e
Close
Low High
Engine Speed : Effective Intake Manifold Length
: Effective Intake Air Chamber LengthEG-127
Operation
1) When the Intake Air Control Valve Closes
While the engine is running at middle speed under high load, the ECM controls the actuator to close the
intake air control valve. As a result, the effective length of the intake manifold is lengthened and the
intake efficiency, in the medium speed range, is improved due to the dynamic effect of the intake air,
thereby increasing power output.
2) When the Intake Air Control Valve Open
Under any condition except when the engine is running at middle speed under high load, the ECM
controls the actuator to open the intake air control valve. When the intake air control valve is open, the
effective length of the intake manifold is shortened and the peak intake efficiency is shifted to the
low-to-high engine speed range, thus providing greater output at low-to-high engine speeds.

ENGINE - 2GR-FE ENGINE
01MEG19Y
VSV
Air Cleaner Cap
Vacuum Tank
Actuator
ECM
Air Intake Control Valve
01MEG20Y
Engine
Speed
SignalECMThrottle Position Sensor Signal
VSVVacuum TankIntake Air
Chamber
Air Cleaner Element
Actuator
Air Intake Control
Va l v e
Resonator Air
AirOpen
Throttle
Opening
Angle
CloseOpen
Low High
Engine Speed
Air Intake Control Valve Condition EG-128
11. Air Intake Control System
General
The system has a dual path design for air intake. An air intake control valve and actuator control the air flow
path.
As a result, a reduction in intake noise in the low-speed range and an increase in the power output in the
high-speed range are realized.
Layout of Components
Operation
When the engine is operating in the low-to-mid speed range, this control operates the air intake control
valve to close one side of the air cleaner inlet. As a result, the intake area has been minimized and the
intake noise is reduced.
When the engine is operating in the high-speed range, this control operates the air intake control valve
to open both sides of the air cleaner inlet. As a result, the intake area has been maximized and the intake
efficiency is improved.

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 ENGINE
01MEG23Y
Purge Line
Purge VSV
Fuel Tank
Canister Pump Module
Canister Pressure Sensor
Leak Detection Pump
Vent Valve
Front
Fresh Air Line
Air Filter
Refueling Valve CanisterEG-131
13. Evaporative Emission Control System
General
The 2GR-FE engine uses the same type of evaporative emission control system as the 2AZ-FE engine. For
details, see page EG-54.
Layout of Main Components

ENGINE - 2GR-FE ENGINE
Service Tip
The ECM of the ’06 RAV4 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, refer to the 2006 RAV4 Repair Manual (Pub. No.
RM01M1U).
To clear the DTC that is stored in the ECM, use a hand-held tester, and disconnect the battery
terminal or remove the EFI fuse for 1 minute or longer.
EG-132
14. Diagnosis
When the ECM detects a malfunction, the ECM makes a diagnosis and memorizes the failed section.
Furthermore, the MIL (Malfunction Indicator Lamp) in the combination meter illuminates or blinks to
inform the driver.
The ECM will also store the DTCs (Diagnostic Trouble Codes) of the malfunctions. The DTCs can be
accessed by using the hand-held tester.
For details, refer to the 2006 RAV4 Repair Manual (Pub. No. RM01M1U).

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 ENGINE
01MEG11Y 285EG01
EG-68
2GR-FE ENGINE
DESCRIPTION
The 2GR-FE engine on the ’06 RAV4 is a newly developed, V6 3.5-liter, 24-valve DOHC engine. This engine
uses the Dual VVT-i (Variable Valve Timing-intelligent) system, DIS (Direct Ignition System), ACIS
(Acoustic Control Induction System), and ETCS-i (Electronic Throttle Control System-intelligent). These
control functions achieve improved engine performance, fuel economy, and reduced exhaust emissions.