Subaru Legacy/Outback

1999-2003 of release

Repair and operation of the car

System of injection of fuel

General information and precautionary measures

Design of an inlet air path of 4-cylinder models (2.0 and 2.5 l)

1 — an air inlet Sleeve
2 — Rezonatornaya a chamber
3 — the Air cleaner

4 — the Filtering element
а: Fresh air
b: To the throttle case

Design of an inlet air path of 6-cylinder models (3.0 l)

1 — an air inlet Sleeve
2 — Rezonatornaya a chamber
3 — the Air cleaner
4 — the Filtering element

5 — the Air duct
а: Fresh air
b: To the throttle case

Design of assembly of MAP and IAT sensors (4-cylinder engines)

1 — the MAP Sensor

2 — the IAT Sensor

Design of the sensor of atmospheric pressure (only l models 2.0 and 2.5 with OBD II)

1 — the Sensor
2 — the Sealing ring
3 — the Casing
4 — the Tube
5 — the volume Through passage
6 — the Plug

7 — the Internal wire
8 — the Compound
9 — the Metal cover

The executive TPS lever is mechanically connected to an axis of a butterfly valve

1 — the Lever

2 — the Plug

Design of the IAC valve used on 4-cylinder engines

1 — the Socket
2 — the Permanent magnet
3 — the Rod

4 — the Winding
5 — the Spring

Design of the electromagnetic valve of pumping of air to air injectors (only l models 2.0 and 2.5 with OBD II)

1 — a valve Saddle
2 — Electromagnetic assembly
3 — Plunger assembly
4 — the Spring

5 — the Socket
А: From the IAC valve
В: To an injector

The principle of management of pressure pulsations in the inlet pipeline

1 — the Induction gate (is closed)
2 — the Induction gate (is open)

А: From the air cleaner

Function chart of a fuel supply system of the 4-cylinder engine

1 — the Electromagnetic valve of a purge of a coal adsorber
2 — the fuel pressure Regulator
3 — the Fuel injector
4 — the throttle Case
5 — the Inlet pipeline
6 — the Double-thread valve
7 — the Coal adsorber
8 — the Cover of a jellied mouth of a fuel tank
9 — the Jellied mouth

10 — the Ventilating tube
11 — the Fuel filter
12 — the pumping Pump
13 — the Fuel pump
14 — the fuel cut-off Valve (the locking valve)
15 — the Fuel tank
16 — the Returnable line
17 — the Line of supply of fuel
18 — the Line of branch of fuel evaporations

Function chart of a fuel supply system of the 6-cylinder engine

1 — the Electromagnetic valve of a purge of a coal adsorber
2 — the fuel pressure Regulator
3 — the Fuel injector
4 — the Damping valve
5 — the throttle Case
6 — the Inlet pipeline
7 — the Double-thread valve
8 — the Coal adsorber
9 — the Cover of a jellied mouth of a fuel tank
10 — the Jellied mouth

11 — the Ventilating tube
12 — the Fuel filter
13 — the pumping Pump
14 — the Fuel pump
15 — the fuel cut-off Valve (the locking valve)
16 — the Fuel tank
17 — ECM
а: Fuel lines
b: Lines of branch of fuel evaporations

Fuel pressure regulator design

1 — the Reducing valve
2 — the Diaphragm
А: To the inlet pipeline

В: Fuel input
С: Fuel exit

Design of the fuel injector used on models 2.0 and 2.5 of the l equipped with system of onboard self-diagnostics of OBD II

1 — the Filter
2 — the Sealing ring
3 — the Plunger

4 — the Sealant
5 — the Sealing ring
6 — the Socket

Design of the fuel injector used on models 2.0 and 2.5 of the l equipped with firm system of onboard self-diagnostics of Subaru

1 — the Filter
2 — the Sealing ring

3 — the Socket

Design of the fuel injector used on models of 3.0 l

1 — the Sealing ring
2 — the Filter
3 — the Plunger

4 — the Sealant
5 — the Sealing ring
6 — the Socket

Design of a fuel tank

1 — Assembly of the fuel pump and sensor of a reserve of fuel
2 — the Nylon tube
3 — the fuel cut-off Valve (an additional chamber)

4 — the Fuel level sensor (an additional chamber)
5 — the Socket of a fast joint
6 — the fuel cut-off Valve (the main chamber)

Fastening of a fuel tank is carried out by means of two metal assembly tapes which are lined with pillows

1 — the Assembly tape
2 — the Pillow

3 — the Steel tape

Design of assembly of the fuel pump

1 — the fuel reserve Sensor
2 — Pump assembly
3 — a pump Cover
4 — the pumping Pump
5 — the Filter of cartridge type
6 — the Mesh filter
7 — the Casing of pump assembly
8 — the Fuel channel
9 — the Rotor
10 — an electric motor Anchor

11 — the Control valve
А: To the line of supply of fuel of the engine
В: From the returnable fuel line
С: From an additional chamber of a fuel tank
D: Entrance
Е: Dumping

Design and principle of functioning of the pump of pumping

1 — the pumping Pump
2 — the Safety valve
3 — the Muffler
4 — the Nozzle

А: Returnable line
В: From an additional chamber of a fuel tank

Design of the fuel level sensor in an additional chamber of a gasoline tank

1 — the Sensor
2 — the Float

3 — To the pumping pump

Design dokatalitichesky a lambda probe, applied on 4-cylinder models (with OBD II)

1 — the Sensitive element
2 — the sensor Case

3 — the Protective tube
4 — Sealing laying

Design dokatalitichesky a lambda probe, applied on 6-cylinder models

1 — Sealing laying
2 — the Ceramic heating element

3 — the sensor Case
4 — the Protective tube

Design post-catalytic lambda probe of 4-cylinder models

1 — the Zirconium tube
2 — the Ceramic heating element
3 — the Protective tube

4 — an electrical wiring Plait
5 — the Case
6 — Sealing laying

Design post-catalytic lambda probe of 6-cylinder models

1 — the Zirconium tube
2 — Sealing laying
3 — the Ceramic heating element

4 — an electrical wiring Plait
5 — the Protective tube
6 — the Case

Design and principle of functioning of the ECT sensor

1 — the Contact socket

2 — the Sensitive element

Design of the CKP sensor of the 4-cylinder engine

1 — the Plug
2 — the Holder
3 — the Magnet

4 — the Winding
5 — the Core
6 — the Cover

Principle of functioning of the CKP sensor of 4-cylinder engines

1 — the CKP Sensor
2 — the Rotor plate

And Half of a turn of a cranked shaft

Principle of functioning of the CKP sensor of 6-cylinder engines

1 — the Rotor plate

2 — a Half of a turn of a cranked shaft

Principle of functioning of the CMP sensor of 4-cylinder engines

1 — Alarm ledges
2 — a camshaft Cogwheel
3 — the Air gap
4 — the CMP Sensor

And One turn of a camshaft (two turns of a cranked shaft)
In the Signal of identification of phases of gas distribution in cylinders

Principle of functioning of the CMP sensor of 6-cylinder engines

1 — the Groove
2 — a camshaft Plate

3 — the Reference point
4 — One turn of a camshaft (two turns of a cranked shaft)

Design of the KS sensor of 4-cylinder engines

1 — the Nut
2 — the Small weight
3 — the Resistor
4 — the Case

5 — the Piezoelement
And — To an electrical wiring plait

Design of the KS sensor of 4-cylinder engines

1 — the Nut
2 — the Case

3 — the Piezoelement
4 — the Resistor

The principle of functioning of the VSS sensor on models with RKPP

1 — the Combination of devices
2 — ECM

3 — VSS
4 — Transmission

The principle of functioning of the VSS sensor on models with AT

1 — the Combination of devices
2 — ECM
3 — TCM

4 — VSS
5 — Transmission

General information

All models considered in the present manual are equipped with electronic system of distributed fuel injection (MFI). Due to use in a control system of the latest technological solutions of MFI provides optimization of configuration of air and fuel mix in any service conditions of the engine.

Fuel is in a power supply system under constant pressure and through injectors is injected into inlet ports of each of engine cylinders. The dosage of supply of fuel is carried out by management of time of opening of electromagnetic valves of injectors according to the amount of the air forced in the engine determined by specific conditions of functioning. Duration of opening of injectors is defined by parameters of the electric impulses formed by the module of management (ECM) that allows to carry out very exact dosage of air and fuel mix.

ECM determines the necessary length of managing directors of impulses on the basis of the analysis of the data on the speed of the movement of the car which are continuously arriving from information sensors, the provision of a butterfly valve, temperature of cooling liquid and so forth.

Besides the listed functions the MFI system exercises also control of toxicity of the fulfilled gases, optimization of a ratio of fuel consumption and return of the engine, control of functioning of pedals of gas and a brake, and also provides adequate starting parameters and warming up of the engine in cold weather, proceeding from data on temperatures of cooling liquid and the soaked-up air.

System of air supply

General information

The air banished via the air cleaner comes to the throttle case, from where, in the quantity determined by the provision of a butterfly valve on the inlet pipeline moves to inlet ports of cylinders of the engine where mixes up with the fuel injected through injectors, forming gas mixture. Stability of turns of idling is provided at the expense of a transmission of part of air mass bypassing the throttle case directly in the inlet pipeline. Control of amount of additional air is exercised by ECM by means of management of functioning of the special perepuskny valve.

Inlet air path

The inlet air path of the 4-cylinder engine consists of an airintaking sleeve, a rezonatorny chamber and assembly of the air cleaner. The resonator is located above the air cleaner on a stream and effectively promotes decrease in level of the noise background arising at absorption of air in the engine.

On 6-cylinder models the structure of an inlet air path switched on two resonators installed one above the air cleaner on a stream, another below.

Pressure sensors in the inlet pipeline (MAP) and temperatures of the soaked-up air (IAT)

On models 2.0 and 2.5 of the l equipped with 4-cylinder engines, MAP and IAT sensors are united in the uniform assembly established on assembly of the inlet pipeline. The MAP sensor serves for measurement of absolute value of pressure in the pipeline, the IAT sensor – for measurement of temperature of the air which is soaked up in the engine. The parameters traced by sensors will be transformed to electric signals and transferred to ECM exercising control of configuration of air and fuel mix, and also the moments of injection and ignition.

On models of 3.0 l with the 6-cylinder engine the MAP sensor is installed from above on the throttle case. And continuously gives out the alarm tension which size is proportional to the size of absolute value of pressure in the inlet pipeline on ECM. On the basis of the analysis of information arriving from the MAP sensor (in a compartment with the data delivered by other sensors) ECM defines the moments of injection of fuel and ignition of air and fuel mix. The IAT sensor is fixed on the case of the air cleaner and traces temperature of the air stream passing on an air duct. The thermistor, which resistance in inverse proportion to temperature of a sensitive element is the basis for a design of the sensor. ECM uses information arriving from the sensor at correction of composition of air and fuel mix.