2006 TOYOTA RAV4 sensor

ENGINE - 2AZ-FE ENGINE
01NEG13Y
Generator
RegulatorB
DF
RLOECM
Various Electrical
Loads
Battery Current Sensor
Battery Temperature Sensor
Battery Voltage
Battery
Various Sensors and Switches
Throttle Position Sensor
Crankshaft Position Sensor
Accelerator Pedal Position
SensorEG-65
11. Charging Control
General
This system lowers the generated voltage when the vehicle is idling or is being driven at a constant speed,
and raises the generated voltage when the vehicle is decelerating. This reduces the load on the engine as
a result of the electric generation of the generator, thus contributing to the fuel economy of the engine.
During acceleration, this system regulates the generated voltage in order to place the amperage estimation
value close to the target value.
This control consists of the ECM, battery current sensor with a built-in battery temperature sensor,
generator, and various sensors and switches.
The ECM detects driving condition based on signals from various sensors and switches, and detects
charging condition based on signals from the generator, battery current sensor and battery temperature
sensor. Then the ECM outputs signals to the IC regulator to control the genetated voltage of the generator.
The ECM stops the charging control and the generator switches to normal power generation mode under
the following conditions:
Low battery capacity
Low or high battery temparature
Wipers operating or blower motor operating with tail lamp relay ON
System Diagram

ENGINE - 2AZ-FE ENGINE
258AS61 281EG86
Output
Voltage5 (V)
0
-100
Current+100 (A)
Characteristic of Current Sensor
288EG61C
(C) 60
Battery Temperature 0 Resistance(k
)
6 EG-66
Battery Current Sensor
Installed on the negative terminal of the battery, this sensor detects the amount of charging and discharging
amperage of the battery and sends signal to the ECM. Based on this signal, the ECM calculates the battery
capacity. A Hall IC is used for detecting the amount of charging and discharging amperage. The changes
that occur in the magnetic flux density in the core as a result of the charging and amperage of the battery
are converted and output as voltage.
Batter Temperature Sensor
The battery temperature sensor is built into the battery current sensor.
The battery characteristic (battery internal resistance) of taking in current for charging varies according
to battery electrolyte temperature. If the electrolyte temperature is too low or too high, the battery internal
resistance will increase, resulting in early deterioration. To prevent this, the battery temperature sensor
changes its resistance as shown below to detect the temperature.

ENGINE - 2AZ-FE ENGINE
Service Tip
To clear the DTC that is stored in the ECM, use a hand-held tester or disconnect the battery terminal
or remove the EFI fuse for 1 minute or longer.
EG-67
Fail-safe
Due to a failure in the battery current sensor or battery temperature sensor, the ECM may determine the
necessity of performing a fail-safe operation. Then, the ECM stops the charging control and the generator
switches to the normal power generation mode.
When the ECM detects a malfunction in a sensor, the ECM memorizes the DTC (Diagnostic Trouble Code).
The MIL (Malfunction Indicator Lamp) does not illuminate.
DTC Chart
DTC No.Detection ItemDTC No.Detection Item
P0516Battery Temperature Sensor
Circuit LowP1551Battery Current Sensor
Circuit Low
P0517Battery Temperature Sensor
Circuit HighP1552Battery Current Sensor
Circuit High
P0560System VoltageP1602Detection of Battery
P1550Battery Current Sensor
Circuit
12. Diagnosis
When the ECM detects a malfunction, the ECM makes a diagnosis and memorizes the failed section.
Furthermore, the MIL in the combination meter illuminates or blinks to inform the driver.
The ECM will also store the DTCs of the malfunctions. The DTCs can be accessed by the use of the
hand-held tester.
For details, refer to the 2006 RAV4 Repair Manual (Pub. No. RM01M1U).
13. Fail-safe
When a malfunction is detected at any of the sensors, there is a possibility of an engine or other malfunction
occurring if the ECM were to continue to control the engine control system in the normal way. To prevent
such a problem, the fail-safe function of the ECM either relies on the data stored in memory to allow the
engine control system to continue operating, or stops the engine if a hazard is anticipated. For details, refer
to the 2006 RAV4 Repair Manual (Pub. No. RM01M1U).

ENGINE - 2GR-FE ENGINE EG-72
Item
(1)(2)(3)(4)(5)
ChargingA segment conductor type generator is used.Charging
SystemA generator pulley with a clutch is used.
Starting
SystemThe PS (Planetary reduction-Segment conductor motor)
type starter is used.
Serpentine Belt
Drive SystemA serpentine belt drive system is used.
The MRE (Magnetic Resistance Element) type VVT sensorsThe MRE (Magnetic Resistance Element) type VVT sensors
are used.
The ETCS-i (Electronic Throttle Control System-intelligent)
Engine
The ETCS i (Electronic Throttle Control System intelligent)
is used.
Control
SystemThe ACIS (Acoustic Control Induction System) is used.SystemThe air intake control system is used.
The charging control is used.
Evaporative emission control system is used.

ENGINE - 2GR-FE ENGINE
285EG10 285EG09
60
Knock Sensor Bosses
36.6 mm
(1.441 in.)
105.5 mm
(4.15 in.)
View from Top Side
285EG11
Wa t e r P a s s a g eEG-75
4. Cylinder Block
The cylinder block is made of aluminum alloy, so it is lightweight.
The cylinder block has a bank angle of 60, a bank offset of 36.6 mm (1.441 in.) and a bore pitch of 105.5
mm (4.15 in.), resulting in a compact block in its length and width even for its displacement.
Installation bosses of the two knock sensors are located on the inside of left and right banks.
A water passage has been provided between the cylinder bores. By allowing the engine coolant to flow
between the cylinder bores, this construction enables the temperature of the cylinder walls to be kept
uniform.

ENGINE - 2GR-FE ENGINE
01MEG13Y
Air Cleaner Hose with
Resonator
Air Cleaner Cap
Charcoal Filter
Air Cleaner Element
(Nonwoven Fabric)
Air Cleaner Case
Actuator
(For Air Intake Control)
Air Cleaner Inlet
Resonator
285EG32
Throttle Position Sensor
Throttle Control MotorEG-91
2. Air Cleaner
A nonwoven, full-fabric type air cleaner
element is used.
A charcoal filter, which adsorbs the HC that
accumulates in the intake system when the
engine is stopped, is used in the air cleaner case
in order to reduce evaporative emissions. This
filter is maintenance-free.
Along with the use of the air intake control
system, an air intake control valve is provided
on the air cleaner case. For details, see page
EG-128.
Resonators have been provided to reduce the
amount of intake air sound.
3. Throttle Body
A linkless-type throttle body in which the throttle position sensor and the throttle control motor are integrated
is used. It realizes excellent throttle valve control. For details, see page EG-118.
In the throttle control motor, a DC motor with excellent response and minimal power consumption is used.
The ECM performs the duty ratio control of the direction and the amperage of the current that flows to
the throttle control motor in order to regulate the throttle valve angle.

ENGINE - 2GR-FE ENGINE
238EG68
VVT Sensors
Crankshaft
Position
Sensor
Va r i o u s
SensorsVV1
VV2
NE
ECMIGT1
IGT2
IGT3
IGT4
IGT5
IGT6
IGF+B Ignition Coil (with Igniter)
No. 1 Cylinder
No. 2 Cylinder
No. 3 Cylinder
No. 4 Cylinder
No. 5 Cylinder
No. 6 Cylinder
285EG39
Igniter
Iron Core
Secondary
Coil
Primary Coil
Plug Cap EG-96
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 is an independent ignition system which has one ignition coil (with igniter) for each cylinder.
2. Ignition Coil
The DIS provides 6 ignition coils, one for each
cylinder. The spark plug cap, which provides
contact to the spark plug, are integrated with an
ignition coil. Also, an igniter is enclosed to
simplify the system.

ENGINE - 2GR-FE ENGINEEG-101
ENGINE CONTROL SYSTEM
1. General
The engine control system of the 2GR-FE engine has the following features.
System
Outline
SFI
(Sequential Multiport
Fuel Injection)
[See page EG-117]
An L-type SFI system detects the intake air mass with a hot-wire type air
flow meter.
ESA
(Electronic Spark
Advance)
Ignition timing is determined by the ECM based on signals from various
sensors. The ECM corrects ignition timing in response to engine
knocking.
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.
ETCS-i
(Electronic Throttle
Control
System-intelligent)
[See page EG-118]
Optimally controls the throttle valve opening in accordance with the amount
of accelerator pedal effort and the condition of the engine and the vehicle.
Dual VVT-i
(Variable Valve
Timing-intelligent)
System
[See page EG-120]
Controls the intake and exhaust camshafts to an optimal valve timing in
accordance with the engine condition.
ACIS
(Acoustic Control
Induction System)
[See page EG-126]The intake air passages are switched according to the engine speed and
throttle valve opening angle to provided high performance in all speed
ranges.
Air Intake Control
System
[See page EG-128]The intake air duct is divided into two areas, and the ECM controls the air
intake control valve and the actuator that are provided in one of the areas to
reduce the amount of engine noise.
Fuel Pump Control
[See page EG-53 in
2AZ-FE section]Fuel pump operation is controlled by signals from the ECM.
The fuel pump is stopped, when the SRS airbag is deployed in a frontal,
side, and rear side collision.
Air Conditioning Cut-off
ControlBy turning the air conditioning compressor ON or OFF in accordance with
the engine condition, drivability is maintained.
Charging Control
[See page EG-65 in
2AZ-FE section]The engine ECU regulates the charging voltage of the generator in
accordance with the driving conditions and the charging state of the battery.
Cooling Fan Control
[See page EG-129]
The cooling fan ECU steplessly controls the speed of the fans in accordance
with the engine coolant temperature, vehicle speed, engine speed, and air
conditioning operating conditions. As a result, the cooling performance is
improved.
(Continued)