2006 TOYOTA RAV4 spark plugs

ENGINE - 2AZ-FE ENGINE EG-4
FEATURES OF 2AZ-FE ENGINE
The 2AZ-FE engine has achieved the following performance through the use of the items listed below.
(1) High performance and reliability
(2) Low noise and vibration
(3) Lightweight and compact design
(4) Good serviceability
(5) Clean emission and fuel economy
Section
Item(1)(2)(3)(4)(5)
Engine
A cylinder block made of aluminum alloy along with a
magnesium alloy die-cast cylinder head cover is used.
Engine
ProperA taper squish shape is used for the combustion chamber.p
A resin gear balance shaft is used.
Vl
A timing chain and chain tensioner are used.
Va l v e
MechanismThe shim-less type valve lifters are used.MechanismThe VVT-i system is used.
A chacoal filter is used in the air cleaner cap.
Intake andIntake manifold made of plastic is used.Intake and
ExhaustThe linkless-type throttle body is used.
SystemA thin-wall ceramic TWC (Three-Way Catalytic converter)
is used.
The fuel returnless system is used.
Fuel
System
Quick connectors are used to connect the fuel hose with the
fuel pipe.
System12-hole type fuel injectors with high atomizing performance
are used.
Ignition
SystemIridium-tipped spark plugs are used.
Charging
SystemThe segment conductor type generator is used.
Starting
SystemPS (Planetary reduction-Segment conductor motor) type
starter is used.
The ETCS-i is used.
Engine
Control
The DIS (Direct Ignition System) makes ignition timing
adjustment unnecessary.
Control
SystemThe non-contact type sensor is used in the throttle position
sensor.
The planar type air-fuel ratio sensor is used.

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
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 - 2GR-FE ENGINEEG-71
FEATURES OF 2GR-FE ENGINE
The 2GR-FE engine has achieved the following performance through the use of the items listed below.
(1) High performance and reliability
(2) Low noise and vibration
(3) Lightweight and compact design
(4) Good serviceability
(5) Clean emission and fuel economy
Item
(1)(2)(3)(4)(5)
A steel laminate type cylinder head gasket is used.
An upright intake port is used.
EngineA taper squish shape is used for combustion chamber.Engine
ProperA cylinder block made of aluminum alloy is used.Proper
The skirt portion of the piston is applied with resin to
reduce friction.
An oil pan No. 1 made of aluminum alloy is used.
The Dual VVT-i (Variable Valve Timing-intelligent)
system is used.
Va l v e
Mh i
Hydraulic lash adjusters are used.
MechanismTiming chains and chain tensioners are used.
Roller rocker arms are used.
Lubrication
SystemAn oil filter with a replaceable element is used.
Cooling SystemThe TOYOTA Genuine SLLC (Super Long Life Coolant)Cooling SystemThe TOYOTA Genuine SLLC (Super Long Life Coolant)
is used for the engine coolant.
The linkless-type throttle body is used.
Intake andThe intake air chamber made of plastic is used.Intake and
Exhaust
S
A stainless steel exhaust manifold is used.
SystemAn ultra thin-wall, high-cell density ceramic type TWC
(Three-Way Catalytic converter) is used.
The fuel delivery pipe made of plastic is used.
Fuel SystemA compact 12-hole type injector is used.Fuel SystemQuick connectors are used to connect the fuel hose with
the fuel pipe.
Ignition System
The DIS (Direct Ignition System) makes ignition timing
adjustment unnecessary.
Ignition System
The long-reach type spark plugs are used.
(Continued)

ENGINE - 2GR-FE ENGINE
285EG40
Iridium Tip
Platinum Tip
Wa t e r J a c k e t Long-reach
Ty p eConventional
Ty p eEG-97
3. Spark Plug
Long-reach type spark plugs are used. This type of spark plugs allow the area of the cylinder head to
receive the spark plugs to be made thick. Thus, the water jacket can be extended near the combustion
chamber, which contributes to cooling performance.
Iridium-tipped spark plugs are used to achieve a 120,000 miles (193,000 km) maintenance interval. By
making the center electrode of iridium, the superior ignition performance as platinum-tipped spark plugs
is achieved and durability has been increased.

EM–1302GR-FE ENGINE MECHANICAL – ENGINE UNIT
EM
54. INSTALL CAMSHAFT TIMING OIL CONTROL VALVE
ASSEMBLY
(a) Install the 4 camshaft timing oil control valves with
the 4 bolts.
Torque: 10 N*m (102 kgf*cm, 7 ft.*lbf)
55. INSTALL VVT SENSOR
(a) Install the 4 VVT sensors with the 4 bolts.
Torque: 10 N*m (102 kgf*cm, 7 ft.*lbf)
56. INSTALL SPARK PLUG
(a) Install the 6 spark plugs.
Torque: 18 N*m (184 kgf*cm, 13 ft.*lbf)
A131977E01
A131976E01

2AZ-FE IGNITION – IGNITION SYSTEMIG–5
IG
ON-VEHICLE INSPECTION
1. CHECK IGNITION COIL ASSEMBLY AND PERFORM
SPARK TEST
NOTICE:
In this section, the terms "cold" and "hot" refer to
the temperature of the coils. "Cold" means
approximately -10 to 50
C (14 to 122F). "Hot" means
approximately 50 to 100
C (122 to 212F).
(a) Check the DTCs.
NOTICE:
If a DTC is present, perform troubleshooting in
accordance with the procedure for that DTC.
(b) Check that sparks occur.
(1) Remove the No. 1 engine cover.
(2) Remove the bolt and ignition coil.
(3) Using a 16 mm spark plug wrench, remove the
spark plug.
(4) Disconnect the 4 fuel injector connectors.
(5) Install the spark plug into the ignition coil, and
then connect the ignition coil connectors.
(6) Ground the spark plug.
(7) Check that sparks occur at the spark plug while
the engine is being cranked.
NOTICE:
• Be sure to ground the spark plugs when
checking them.
• If the ignition coil has been struck or
dropped, replace it.
• Do not crank the engine for more than 2
seconds.
If sparks do not occur, Perform the spark test.
(8) Using a 16 mm plug wrench, install the spark
plug.
Torque: 25 N*m (254 kgf*cm, 18 ft.*lbf)
A124849E01
A097448E01
A124396

IG–82AZ-FE IGNITION – IGNITION SYSTEM
IG
(e) Clean the spark plugs.
If the electrode has traces of wet carbon, clean the
electrode with a spark plug cleaner and then dry it.
Standard air pressure:
588 kPa (6 kgf*cm
2, 85 psi)
Standard duration:
20 seconds or less
HINT:
Only use the spark plug cleaner when the electrode
is free of oil. If the electrode has traces of oil, use
gasoline to clean off the oil before using the spark
plug cleaner.
B062019E01