Download 2az-fe Engine Manual
.1NZ-FE ENGINE JDESCRIPTION The 1NZ-FE engine is a in-line, 4-cylinder, 1.5 liter, 16-valve DOHC engine. The VVT-i (Variable Valve Timing-intelligent) system, DIS (Direct Ignition System) and ETCS-i (Electronic Throttle Control System-intelligent) are used on this engine in order to realize high performance, quietness, fuel economy and clean emission.EG-3 ENGINE - 1NZ-FE ENGINE ' Engine Specifications No. & Arrangement 4-Cylinder, In-line Valve Mechanism 16-Valve DOHC, Chain Drive (with VVT-i) Combustion Chamber Pentroof Type Manifolds Cross-Flow Fuel System Ignition System Displacement (cu. In.) 1497 (91.3) Bore x Stroke mm (in.).EG-4 ENGINE - 1NZ-FE ENGINE JFEATURES OF 1NZ-FE ENGINE The 1NZ-FE engine has been able to achieve the following performance through the adoption of the items listed below. (1) High performance and fuel economy (2) Low noise and vibration (3) Lightweight and compact design.EG-5 ENGINE - 1NZ-FE ENGINE JENGINE PROPER 1. Cylinder Head D The injectors are installed in the cylinder head to reduce the distance from injector to intake valve, thus it prevents the fuel from adhering to the intake port walls, and reduce exhaust emissions.EG-6 ENGINE - 1NZ-FE ENGINE D The liners are the spiny-type, which have been manufactured so that their casting exterior forms a large irregular surface in order to enhance the adhesion between the liners and the aluminum cylinder block.
The enhanced adhesion helps improve heat dissipation, resulting in a lower overall temperature and heat deformation of the cylinder bores.EG-7 ENGINE - 1NZ-FE ENGINE 4. Connecting Rod D The connecting rods and caps are made of high strength steel for weight reduction. D Nutless-type plastic region tightening bolts are used for a light design. Plastic Region Tightening Bolts 171EG07 5.EG-8 ENGINE - 1NZ-FE ENGINE JVALVE MECHANISM 1.
General D The shimless type valve lifter is used to increase the amount of the valve lift. D The intake and exhaust camshafts are driven by a timing chain. D The VVT-i system is used to realize fuel economy, engine performance and reduce exhaust emissions. For details of VVT-i control, see page EG-41.EG-9 ENGINE - 1NZ-FE ENGINE 2. Camshaft D Oil passages are provided in the intake camshaft in order to supply engine oil to the VVT-i system.
D A VVT-i controller is provided on the front of the intake camshaft to vary the timing of the intake valves.EG-10 ENGINE - 1NZ-FE ENGINE 4. Timing Chain Cover D A single-piece, aluminum diecast timing chain cover that entirely seals the front portion of the cylinder block and cylinder head is used. D A service hole for the chain tensioner is provided in the timing chain cover to improve serviceability.EG-11 ENGINE - 1NZ-FE ENGINE JLUBRICATION SYSTEM 1. General D The lubrication circuit is fully pressurized and oil passes through an oil filter. D A trochoid gear type oil pump, which is driven directly by the crankshaft, is provided in the front of the cylinder block.D The flow of the engine coolant makes a U-turn in the cylinder block to ensure a smooth flow of the engine coolant.
D A single cooling fan provides both the cooling and air conditioner performance. D The TOYOTA genuine Super Long Life Coolant (SLLC) is used. From Heater Core To Radiator.EG-13 ENGINE - 1NZ-FE ENGINE ' Engine Coolant Specifications TOYOTA genuine Super Long Life Coolant (SLLC) or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite and non-borate Type coolant with long-life hybrid organic acid technology (coolant with long-life hybrid.EG-14 ENGINE - 1NZ-FE ENGINE JINTAKE AND EXHAUST SYSTEM 1. General D A plastic intake manifold is used for weight reduction. D The linkless-type throttle body is used to realize excellent throttle control.
D ETCS-i (Electronic Throttle Control System-intelligent) provides excellent throttle control. For details, see page EG-36.EG-15 ENGINE - 1NZ-FE ENGINE 2. Air Cleaner D A nonwoven, full-fabric type air cleaner element is used. D A charcoal filter, which adsorbs the HC that accumulates in the intake system when the engine is stopped, is used in the air cleaner cap in order to reduce evaporative emissions.EG-16 ENGINE - 1NZ-FE ENGINE 4. Intake Manifold D The intake manifold has been made of plastic to reduce the weight and the amount of heat transferred from the cylinder head. As a result, it has become possible to reduce the intake.EG-17 ENGINE - 1NZ-FE ENGINE JFUEL SYSTEM 1.
2az Fe Balance Shaft Timing
General D The fuel returnless system is used to reduce evaporative emissions. D A fuel tank made of multi-layer plastic is used. D A fuel cut control is used to stop the fuel pump when the SRS airbag is deployed in a front or side collision.EG-18 ENGINE - 1NZ-FE ENGINE 2. Fuel Returnless System This system is used to reduce the evaporative emission.
As shown below, integrating the fuel filter, pressure regulator, fuel sender gauge, and fuel cutoff valve with module fuel pump assembly enables to discontinue the return of fuel from the engine area and prevent temperature rise inside the fuel tank.EG-19 ENGINE - 1NZ-FE ENGINE JIGNITION SYSTEM 1. General D A DIS (Direct Ignition System) is used. The DIS in this engine is an independent ignition system, which has one ignition coil for each cylinder. The DIS ensures the ignition timing accuracy, reduces high-voltage loss, and realizes the overall reliability of the ignition system by eliminating the distributor.EG-20 ENGINE - 1NZ-FE ENGINE 2.
Spark Plug D Long-reach type iridium-tipped spark plugs are used. D Long-reach type of spark plugs allows 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.EG-21 ENGINE - 1NZ-FE ENGINE JCHARGING SYSTEM D A compact and lightweight segment conductor type generator that generates high amperage output in a highly efficient manner is used as standard equipment.
D This generator has a joined segment conductor system, in which multiple segment conductors are welded together to form the stator.EG-22 ENGINE - 1NZ-FE ENGINE ' Wiring Diagram Generator Ignition Switch Regulator Discharge Warning Light 00REG20Y.EG-23 ENGINE - 1NZ-FE ENGINE JSTARTING SYSTEM 1. General D A P (conventional planetary reduction) type starter is used in the models for U.S.A. D A PS (planetary reduction-segment conductor motor) type starter is used in the models for Canada and cold areas of the U.S.A.EG-24 ENGINE - 1NZ-FE ENGINE 2. PS (Planetary reduction-Segment conductor motor) Type Starter Construction D Instead of constructing the armature coil with P type of round-shaped conductor wires, the PS type starter uses square conductors. With this type of construction, the same conditions that are realized by winding numerous round-shaped conductor wires can be achieved without increasing the mass.EG-25 ENGINE - 1NZ-FE ENGINE JENGINE CONTROL SYSTEM 1. General The engine control system for the 1NZ-FE engine has the following systems. ’06 ’05 System Outline Model Model An L-type EFI system detects the intake air mass with a Electronic Fuel hot-wire type air flow meter.EG-26 ENGINE - 1NZ-FE ENGINE ’06 ’05 System Outline Model Model Starter Control Once the ignition switch is turned to the START position, Cranking Hold this control continues to operate the starter until the engine Function is started.
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See Page EG-57.EG-27 ENGINE - 1NZ-FE ENGINE 2. Construction The configuration of the engine control system in the 1NZ-FE engine is shown in the following chart. SENSORS ACTUATORS MASS AIR FLOW METER No.1 INJECTOR INTAKE AIR TEMPERATURE No.2 INJECTOR SENSOR No.3 INJECTOR CRANKSHAFT POSITION No.4 INJECTOR.EG-28 ENGINE - 1NZ-FE ENGINE CANISTER PUMP MODULE EVAPORATIVE EMISSION CONTROL PPMP CANISTER PRESSURE SENSOR CANISTER PUMP MODULE MPMP ELS1 LEAK DETECTION PUMP TAILLIGHT SWITCH VPMP VENT VALVE ELS3 DEFOGGER SWITCH PURGE VSV STOP LIGHT SWITCH GENERATOR STATER CONTROL STAR.EG-29 ENGINE - 1NZ-FE ENGINE 3. Engine Control System Diagram Park/Neutral Position Switch. Ignition Accelerator Pedal DLC3 Switch Position Sensor Generator Circuit Opening Relay Battery Throttle Position Sensor Mass Air Flow Meter D Intake Air Temperature Throttle Sensor Control Motor.EG-30 ENGINE - 1NZ-FE ENGINE 4. Layout of Main Components Canister Pump Module D Vent Valve D Leak Detection Pump D Canister Pressure Sensor Heated Oxygen Sensor (Bank 1, Sensor 2) Fuel Pump VSV (for EVAP) DLC3 Accelerator Pedal Position Sensor.EG-31 ENGINE - 1NZ-FE ENGINE 5. Main components of Engine Control System General The main components of the 1NZ-FE engine control system are as follows: Components Outline Quantity Function The ECM optimally controls the SFI, ESA, and IAC 32-bit CPU to suit the operating conditions of the engine in accordance with the signals provided by the sensors.EG-32 ENGINE - 1NZ-FE ENGINE Air Fuel Ratio Sensor and Heated Oxygen Sensor 1) General D The air fuel ratio sensor and heated oxygen sensor differ in output characteristics.
D Approximately 0.4V is constantly applied to the air fuel ratio sensor, which outputs an amperage that varies in accordance with the oxygen concentration in the exhaust emission.EG-33 ENGINE - 1NZ-FE ENGINE 2) Construction D The basic construction of the air fuel ratio sensor and heated oxygen sensor is the same. However, they are divided into the cup type and the planar type, according to the different types of heater construction that are used.EG-34 ENGINE - 1NZ-FE ENGINE Throttle Position Sensor The throttle position sensor is mounted on the throttle body to detect the opening angle of the throttle valve. The throttle position sensor converts the magnetic flux density that changes when the magnetic yoke (located on the same axis as the throttle shaft) rotates around the Hall IC into electric signals to operate the throttle control motor.EG-35 ENGINE - 1NZ-FE ENGINE Accelerator Pedal Position Sensor The non-contact type accelerator pedal position sensor used a Hall IC. D The magnetic yoke that is mounted at the accelerator pedal arm rotates around the Hall IC in accordance with the amount of effort that is applied to the accelerator pedal.EG-36 ENGINE - 1NZ-FE ENGINE 6. ETCS-i (Electronic Throttle Control System-i) General D The ETCS-i is used, providing excellent throttle control in all the operating ranges.