Subaru Legacy/Outback

1999-2003 of release

Repair and car operation


Subaru Legasi, Autbek
+ Cars Subaru Legacy, Outback
+ The operation manual
+ Routine maintenance
+ The engine
+ Systems of cooling, heating
- The power supply system and release
   Specifications
   + System of injection of fuel
   - Control systems of the engine and decrease in toxicity of the fulfilled gases
      ЕСМ - check of serviceability of a condition and replacement
      Diagnostics of malfunctions - the general information and preliminary checks
      System of onboard self-diagnostics (OBD) - the general information
      Application of an oscillograph for supervision of working parametres of a control system
      Removal and installation of components of systems of decrease in toxicity of the fulfilled gases
   + System of release of the fulfilled gases
+ Engine electric equipment
+ Manual box and differential
+ Automatic transmission
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment

Control systems of the engine and decrease in toxicity of the fulfilled gases

The general information

Function chart of control systems of the engine/decrease of toxicity of the fulfilled gases (models 2.0 and 2.5 l equipped with system of diagnostics OBD II)

1 — engine management Model (ECM)
2 — the ignition Module
3 — the Gauge of position of a cranked shaft (CKP)
4 — the Gauge of position of a camshaft (CMP)
5 — the Gauge of position throttle заслонки (TPS)
6 — Fuel injectors
7 — a pressure Regulator
8 — the Gauge of temperature of a cooling liquid of the engine (ECM)
9 — the Gauge of temperature and pressure of soaked up air
10 — the Electromagnetic valve of stabilisation of turns of idling (IAC)
11 — the Electromagnetic valve of management of a purge of a coal adsorber
12 — the Fuel pump
13 — the Valve of system of ventilation картера (PCV)
14 — the Air filter
15 — the Coal adsorber of system of catching of fuel evaporations (EVAP)
16 — the Main relay
17 — the Relay of the fuel pump
18 — the Fuel filter
19 — Forward каталитический the converter
20 — Back каталитический the converter

21 — the Fan of system of cooling
22 — the Relay of the fan of system of cooling
23 — the Gauge of atmospheric pressure
24 — the detonation Gauge (KS)
25 — the Dokatalitichesky ljambda-probe
26 — the Postkatalitichesky ljambda-probe
27 — the Electromagnetic valve подмешивания air in injectors
28 — the Compressor of a central air of air (К/В)
29 — the Gauge-switch of the permission of start (only models with АТ)
30 — the Gauge-switch of neutral position of transmission (only models with РКПП)
31 — the Control lamp of refusals (MIL / «Check up the engine»)
32 — the Tachometer
33 — Relay K/V
34 — the Module of management К/В
35 — the ignition Switch
36 — the Module of management of transmission (TCM) (only models with АТ)
37 — the Gauge of speed of movement of the car (VSS)
38 — the Diagnostic socket of a line of given (DLC)
39 — the Valve отсечки fuel
40 — the Double-thread valve


Function chart of control systems of the engine/decrease of toxicity of the fulfilled gases (models 2.0 and 2.5 l equipped OBD Subaru)

 Decoding of abbreviations see the previous illustration


1 — ECM
2 — the ignition Module
3 — Gauge CMP
4 — Gauge CKP
5 — TPS
6 — Fuel injectors
7 — a pressure Regulator
8 — Gauge ECT
9 — the Valve отсечки fuel
10 — the Gauge of temperature and pressure of soaked up air
11 — the Gauge-switch of pressure ГУР
12 — Electromagnetic valve IAC
13 — the Electromagnetic valve of management of a purge of a coal adsorber
14 — the Fuel pump
15 — Valve PCV
16 — the Air filter
17 — Coal adsorber EVAP
18 — the Main relay
19 — the Relay of the fuel pump
20 — the Fuel filter

21 — the Fan of system of cooling
22 — the Relay of the fan of system of cooling
23 — KS
24 — Compressor K/V
25 — the Gauge-switch of the permission of start (only models with АТ)
26 — the Gauge-switch of neutral position of transmission (only models with РКПП)
27 — Control lamp MIL / «Check up the engine»
28 — the Tachometer
29 — Relay K/V
30 — the Module of management К/В
31 — the ignition Switch
32—VSS
33 — DLC
34 — the Gauge-switch of pressure of liquid ГУР
35 — the Double-thread valve
36 — the Ljambda-probe (models with catalytic the converter)
37 — Forward каталитический the converter (at a corresponding complete set)
38 — Back каталитический the converter (at a corresponding complete set)
39 — Neutralizer WITH (only models of the basic complete set)
40—TCM (only models with АТ)


Function chart of control systems of the engine/decrease of toxicity of the fulfilled gases (model 3.0)

1 — ECM
2 — the ignition Module
3 — Gauge CKP
4 — Gauge CMP
5 — TPS
6 — Fuel injectors
7 — a pressure Regulator
8 — Gauge ECT
9 — the Gauge of temperature of soaked up air (IAT)
10 — the pressure Gauge in the inlet pipeline (MAP)
11 — Electromagnetic valve IAC
12 — the Electromagnetic valve of management of a purge of a coal adsorber
13 — the Fuel pump
14 — Valve PCV
15 — the Air filter
16 — Coal adsorber EVAP
17 — the Main relay
18 — the Relay of the fuel pump
19 — the Fuel filter
20 — Left forward каталитический the converter
21 — Right forward каталитический the converter
22 — Back каталитический the converter
23 — the Fan of system of cooling
24 — the Relay of the fan of system of cooling
25 — Left KS

26 — Right KS
27 — Left докаталитический a ljambda-probe
28 — Right докаталитический a ljambda-probe
29 — the Postkatalitichesky ljambda-probe
30 — Compressor K/V
31 — the Gauge-switch of the permission of start
32 — Control lamp MIL / «Check up the engine»
33 — the Tachometer
34 — Relay K/V
35 — the Module of management К/В
36 — the ignition Switch
37 — VSS
38 — DLC
39 — TCM
40 — the Gauge of a stock of fuel
41 — the Double-thread valve
42 — the Valve отсечки fuel
43 — the Induction valve of system подмешивания air
44 — the Control valve
45 — the Operating electromagnetic valve of system подмешивания air
46 — the Vacuum tank
47 — the system Valve recycling the fulfilled gases (EGR)
48 — Fuel демпфер
49 — the Gauge of atmospheric pressure


Monitoring of structure of an air-fuel mix

1 — Forward каталитический the converter
2 — the Fulfilled gases
3 — the Dokatalitichesky ljambda-probe
4 — the Fuel injector
5 — the combustion Chamber
6 — ECM
And — the Signal of increase in duration of opening of an injector

In — the Signal of reduction of duration of opening of an injector
With — High level of the maintenance of oxygen in the fulfilled gases
D — Low level of the maintenance of oxygen in the fulfilled gases
Е — the Signal of the reimpoverished mix
F — the Signal of the reenriched mix


 More detailed information on control systems of the engine and decrease in toxicity of the fulfilled gases of your car can be received in representation branch or on firm car repair shop Subaru.


For the purpose of decrease in level of issue in atmosphere of the toxic components getting to structure of fulfilled gases of the engine as a result of evaporation and incompleteness of combustion of fuel, and also for maintenance of efficiency of return of the engine and decrease in the expense of the fuel, cars considered in the present Management are equipped by variety of special systems which can be united under the general name of control systems of the engine and decrease in toxicity of the fulfilled gases. The complete set of systems depends on year of release of models and region, on whose market the car is delivered. The full information on type and structure of systems is resulted on information label VECI fixed under a cowl.

 The scheme of a lining of hoses can be resulted on separate шильде. The principle of functioning of control systems is presented by the engine/decrease of toxicity of the fulfilled gases on illustrations.


To number of the systems concerning management by work of the engine and the control over toxicity of fulfilled gases, it is necessary to carry the following (depending on a complete set):

a) ignition System (the engine Electric equipment see the Head);
b) System of catching of fuel evaporations (EVAP);
c) System recycling the fulfilled gases (EGR) (models 3.0;
d) System of operated ventilation картера (PCV);
e) the Katalitichesky converter (;
f) the Conductor of a jellied mouth of a fuel tank (under a refuelling pistol of columns of pouring unleaded gasoline);
g) System of onboard diagnostics (OBD).

Functioning of all listed systems, anyhow, directly or indirectly, is connected with management of decrease in toxicity of the fulfilled gases. In the Sections resulted more low the general descriptions of principles of functioning of each of systems are given, and also procedures of diagnostic checks and regenerative repair (if that is obviously possible) the separate components which performance lies within qualification of the average mechanic-fan are stated

Before to come to conclusion about refusal any of systems of decrease in toxicity, attentively check up serviceability of functioning of power supply systems and ignition. Diagnostics of systems of decrease in toxicity some of knots demands use of the special difficult equipment in application and certain qualification of the executor that is why, it will be reasonable to charge its performance to professional mechanics of a specialised car repair shop. Told above does not mean that service and repair of components of systems of decrease in toxicity in practice are represented exigeant. It is necessary to remember that one of the most widespread causes of failures is elementary infringement of quality of connections of vacuum or electric lines that is why, first of all always it is necessary to check a condition corresponding electric and штуцерных sockets. The owner of the car can make independently and easily enough variety of checks, and also, execute in house conditions set of procedures of routine maintenance of the majority of components of systems, using thus a usual set of the adjusting and metalwork tool.

 Do not forget about additional federal guarantee certificates under which components of systems of decrease in toxicity and management of engine work get. Before to start performance of any procedures on repair of knots and details of the given systems, consult about conditions of observance of these obligations in representation branch of company Subaru.


Try to observe all safety measures stipulated in below-mentioned Sections at performance of service of electronic components of considered systems. It is necessary to notice that the illustrative material can correspond not always in accuracy to real placing of components on the car. Such discrepancies are connected with continuously occurring process of updating within the limits of a typical design of each model.

Control system of the engine

The management module (ECM)

The general information

ECM represents the electronic module on the basis of the microprocessor which on the basis of the analysis of signals arriving from various information gauges exercises administration of functioning of systems of injection, ignitions and decrease in toxicity of the fulfilled gases.

Into number carried out ECM problems enter:

a) fuel Management in parametres of injection;
b) ignition Management in parametres;
c) Management of functioning of system of stabilisation of turns of idling (IAC);
d) Management of system EVAP functioning;
e) Management of functioning of the fan of system of cooling;
f) Management of functioning of the fuel pump;
g) Management of system EGR functioning (models 3.0;
h) Self-diagnostics;
i) Activation of emergency parametres of the failed subsystems.

When ECM develops target signals of the fixed level without the signals arriving from a ljambda-probe (ов), say that the control system functions in a mode of "an open contour», i.e., without a feedback. If the module starts to process given out by the oxygen gauge (ами) the information the mode becomes "closed" that allows ECM to correct parametres of injection and ignition taking into account current operational characteristics of the engine (turns, loading, temperature, and so forth).

In memory of the module emergency values (values by default) the basic working parametres of all subsystems of management are put. The given parametres are activated in case of revealing of refusal of a corresponding subsystem, providing adequacy of functioning of the engine (with inevitable loss of efficiency of return).

Refusal of any subject to monitoring from outside the block of self-diagnostics of a component is fixed in memory of the module in the form of a corresponding five-place code (DTC), which reading can be made by means of the special scanner (the Section System of onboard self-diagnostics (OBD) - the general information) see.

Giving of fuel and configuration of an air-fuel mix

Tracing and analyzing the data arriving from corresponding information gauges, ECM defines necessary parametres of giving of fuel (quantity and the injection moments). The module carries out the continuous consecutive control of injection at any service conditions of the engine, except the warming up moments at start.

The quantity of fuel injected into the engine is defined by duration of opening of needle valves of injectors.

The injection moment is calculated taking into account peak efficiency of giving of air in each of engine cylinders (fuel is injected directly ahead of the moment of the beginning of opening of the inlet valve).

Duration of injection

During engine warming up at start duration of opening of injectors is defined by gauge ECM according to change of temperature of a cooling liquid. After the engine will get warm to normal working temperature, the following scheme of definition of duration of injection joins: «Base value х Adjustment parametres + the Variable of indemnification of change of level of pressure». Thus base value of duration of opening of an injector is defined by two major factors: quantity of air submitted to the engine (on signals of the gauge of pressure in the pipeline) and current frequency of rotation of the engine (on gauge CKP signals). Adjustment parametres are considered more low. The compensatory variable urged to compensate time delays of operation of the injectors, the pressure of the storage battery connected with variations.

The organisation listed below updatings allows to correct in due time base value of duration of opening of injectors for the purpose of maintenance of optimum quality of an air-fuel mix at any parametres of functioning of the engine.

· Updating of structure of an air-fuel mix on signals докаталитического a ljambda-probe. On equipped catalytic the converter models given out доcatalytic a ljambda-probe the information on maintenance level in the fulfilled gases of oxygen allows ECM to correct in due time a dosage of giving of fuel for the purpose of prevention of appreciable deviations of quality of a gas mixture from стехиометрического values;
· Starting updating of structure of a mix. During the moment проворачивания a cranked shaft at start duration of opening of injectors compulsorily increases for the purpose of maintenance of stability of turns of the engine;
· Updating of structure of a mix during engine warming up. The given updating (the more low the temperature of a cooling liquid, the duration of injection there is more) is carried out on the basis of the data which is given out by gauge ECT, and used ECM for stabilisation of turns of the engine during its warming up;
· Poststarting updating. The given updating allows to stabilise engine turns during the moment directly after realisation of its start (the information on temperature of the cooling liquid, delivered by gauge ECT is considered also);
· Updating of structure of a mix at full opening throttle заслонки. At full opening throttle заслонки duration of time of opening of injectors increases according to the information arriving from TPS and the gauge of pressure in the inlet pipeline;
· Updating of structure of a mix during an acceleration. The given updating urged to compensate a time delay of definition of quantity of soaked up air for the purpose of increase of sensitivity of the engine on manipulation with a pedal of gas during an acceleration.

On considered models updating of structure of an air-fuel mix on signals докаталитического a ljambda-probe is organised intellectually. The essence of the told is concluded in the following: during management of structure of mix ECM on the basis of the analysis of the information arriving from the oxygen gauge calculates correcting variable which then is added to put in memory of the processor (corresponding to current turns of the engine) to base value of duration of time of opening of injectors, thus sensitivity and reactance of system by that more low, than more considerably size of the demanded time additive. The intellectual organisation of process allows to bypass the given situation at the expense of continuous updating of base value by addition to it of last correcting additive and preservation of total value in operative memory of the processor, thus, the size of the next updating is essentially reduced, and efficiency of functioning of system increases.

Gas mixture ignition

The scheme of management in parametres of ignition on models 2.0 and 2.5 l

1 — cylinder Number
2 — the Impulse of an angle of rotation of a cranked shaft (before ВМТ)
3 — the Impulse of an angle of rotation of a camshaft (after ВМТ)
4 — Installation of a corner of an advancing of ignition at engine start

5 — the Corner of an advancing of ignition at normal work of the engine
6 — mix Combustion
7 — porosity Installation
8 — Podzhig

The scheme of management in parametres of ignition on l models 3.0

1 — cylinder Number (ВМТ)
2 — the Impulse of an angle of rotation of a cranked shaft (before ВМТ)

3 — the Impulse of an angle of rotation of a camshaft (after ВМТ)
4 — Installation of a corner of an advancing of ignition at engine start


ECM continuously traces a current working condition of the engine on the signals arriving from gauges of pressure, temperatures of a cooling liquid, temperature of soaked up air of position of a cranked shaft and so forth On the basis of the analysis of received information ECM selects optimum (from put in memory of the processor) the ignition moment in which gives out on the module of ignition a signal of interruption of a primary contour.

 

At management of ignition intellectual function (function of fast recognition) in which the data written down in memory ECM is compared to the information arriving from information gauges and gauges-switches also is used. So, at a choice of the moment of ignition for any operating conditions of engine ECM processes the information on target capacity of the power unit, the fuel expense, structure of the fulfilled gases and so forth During engine start fluctuations of its turns in view of what the management module is not capable to supervise adequately a corner of an advancing of ignition always take place, therefore for the given period the corner compulsorily is exposed on 10 ° before ВМТ on a special signal «10 °» gauge CKP.

After realisation of start of engine ECM in a range of signals CKP between 97 ° and 65°отслеживает current turns of the engine and on the basis of the analysis of the received information are exposed by a corner of an advancing and porosity of an impulse of ignition corresponding to current requirements of the engine.

Management of idling turns

ECM provides stability of turns of idling of the engine by activation of lamellar electromagnetic valve IAC operating перепусканием additional air bypassing the throttle case. As initial information ECM uses the given positions of a cranked shaft delivered by gauges (CKP), temperatures of a cooling liquid (ECT), pressure, and also the gauge-switch of activation of the conditioner of air that allows to carry out a complete control behind engine turns at any current loading. As an operating element of valve IAC the electromagnet reacting to level of porosity of the operating periodic signal is used. The above the factor of filling of the signal which is given out by the module of management on an electromagnet, the the big degree of opening rotary заслонки provides last. The expense of additional air is directly proportional to opening degree заслонки and direct impact on frequency of rotation of the engine makes.

 

The primary goals of the device is indemnification of increase of loading on the engine at activation К/В or other power-intensive consumer of the electric power, increase of turns of idling of the engine in an initial stage of its warming up, maintenance of buffer effect at fast closing throttle заслонки, and also increase of stability of turns of the engine idling.

Management of functioning of the fuel pump

Leaning against the information delivered by the gauge of position of a camshaft (CMP), ECM provides management functioning of the fuel pump by inclusion/deenergizing of its relay. For the purpose of increase of level of safety the fuel pump is automatically blocked at spontaneous остановах the engine at the included ignition. The principle of the organisation of management is formulated in the table resulted above.

Systems of decrease in toxicity of the fulfilled gases

Ventilation system картера (PCV)

Principle of functioning of system of ventilation картера (PCV) on an example of the 6-cylinder engine

1 — the Air chamber
2 — the throttle Case
3 — the Connecting hose
4 — Valve PCV
5 — the Cover of the right head of cylinders
6 — Carter of the engine
7 — the Cover of the left head of cylinders

8 — the Spring
9 — the Valve
And — To the inlet pipeline
In — Karternye gases

System PCV serves for issue decrease in atmosphere of hydrocarbonic connections at the expense of a conclusion from the engine картерных gases.

Valve PCV, tightly closed cover of a jellied mouth of impellent oil, air inlet and the complete set of connecting vacuum hoses concern number of the basic components of system.

At incomplete opening throttle заслонки, containing in the engine картерные gases, on a special hose through valve PCV are taken away in the inlet pipeline at the expense of relevancy of depth of depression created in it. Simultaneously in картер the engine on connected to a cover of a head of cylinders to a hose fresh air is started.

At completely opened заслонке when depth in the inlet pipeline is not so great, the part картерных gases on a separate hose is forwarded to an inlet air path and further - in the throttle case.

 In due course walls of the case of a throttle start to become covered by tarry adjournment, in particular around an arrangement throttle заслонки. In view of told, it is necessary to make cleaning of the case of a throttle from time to time.

Three-functional каталитический the converter (TWC)

 The Katalitichesky converter can not enter into a standard complete set of models 2.0 and 2.5 l equipped OBD Subaru.

The Katalitichesky converter () is a component of systems of decrease in toxicity of the fulfilled gases, is included in structure of system of release and serves for issue decrease in atmosphere of toxic components. There are two types каталитических converters. The usual oxidising converter allows to lower the maintenance in the fulfilled gases of hydrocarbons (NANOSECOND) and монооксида carbon (WITH). Three-functional каталитический the converter (TWC) in addition allows to reduce issue оксидов nitrogen (NОХ). On all models considered in the present Management are used three-functional каталитические converters.

Base components of the catalyst are platinum (Pt), rhodium (Rh) and палладиум (Pd) which mix is put by a thin layer on having form of an oval a cellular design, or a porous ceramic basis.

 In order to avoid an irreversible exit of the catalyst out of operation for refuelling equipped catalytic the converter of models it is necessary to use exclusively неэтилированное fuel!

Peak efficiency of functioning of the catalyst is reached at certain concentration in the fulfilled gases of toxic components. The demanded balance is reached at the expense of the control of structure of an air-fuel mix which the control system tries to support constantly near to the value equal стехиометрическому to number, - the following subsection see.

Control system of quality of an air-fuel mix

 On models 2.0 and 2.5 l equipped OBD Subaru, the given system are established only complete with catalytic the converter.

The system on the basis of the signals continuously arriving докаталитического of a ljambda-probe (ов), makes corresponding updatings of base value of duration of opening of injectors for the purpose of maintenance of quality of an air-fuel mix close стехиометрического values (14.7 parts of air on 1 part of fuel), providing optimum conditions for functioning three-functional каталитического the converter (TWC).

 Various base values of time of opening of injectors are provided for various turns of the engine, current loadings and quantity of soaked up air.

In system the intellectual updating of current base values allowing appreciably to raise reactance of responses to occurring changes also is provided.

Control system of ignition

Management of functioning of system of ignition carries out also ECM, leaning against the data arriving from various information gauges and gauges-switches. The scheme of functioning of a control system is presented by ignition of various engines on illustrations.

The scheme of functioning of a control system of ignition of the 4-cylinder engine

1 — the Storage battery
2 — the ignition Switch
3 — ECM
4 — the Gauge of position of a camshaft (CMP)
5 — the detonation Gauge (KS)

6 — the Gauge of temperature and pressure of soaked up air
7 — the Gauge of temperature of a cooling liquid (ECT)
8 — the Spark plug
9 — the ignition Module
10 — the Gauge of position of a cranked shaft (CKP)


The scheme of functioning of a control system of ignition of the 6-cylinder engine

1 — ECM
2 — the Coil of ignition of 1st cylinder
3 — the Coil of ignition of 3rd cylinder
4 — the Coil of ignition of 5th cylinder
5 — Gauge CMP
6 — the pressure Gauge
7 — the Gauge of temperature of soaked up air (IAT)
8 — Gauge CKP

9 — the Gauge of position throttle заслонки (TPS)
10 — the Coil of ignition of 6th cylinder
11 — the Coil of ignition of 4th cylinder
12 — the Coil of ignition of 2nd cylinder
13 — Gauge ECT
14 — Left KS
15 — Right KS

Principle of functioning of system EGR

1 — Valve EGR
2 — ECM
3 — the Inlet pipeline

4 — Final port
5 — the Left head of cylinders


The scheme of functioning of system of catching of fuel evaporations (EVAP) on models 2.0 and 2.5 l (on models 3.0 of l the scheme is organised similarly)

1 — the Inlet pipeline
2 — the throttle Case
3 — the Electromagnetic valve of management of an adsorber purge
4 — ECM

5 — the Coal adsorber
6 — the Fuel tank
7 — the Valve отсечки fuel (запорный the valve)
8 — the Double-thread valve

On the basis of the analysis of arriving information ECM calculates optimum values of a corner of an advancing and porosity of operating impulses of ignition for any current working parametres of the engine. In the work ECM uses a program card of management on the closed contour, providing magnificent reactance of responses to any changes of the entering data.

System recycling the fulfilled gases (EGR) - only l models 3.0

The system recycling the fulfilled gases (EGR) serves for emission minimisation in atmosphere оксидов nitrogen (NOX). The task in view decision is reached by decrease in temperature of combustion of a gas mixture for the account подмешивания to it of certain quantity of the fulfilled gases of the engine. On in appropriate way the equipped models it is organised operated ECM a contour recycling the fulfilled gases in the inlet pipeline.

System of catching of fuel evaporations (EVAP)

The general information

System EVAP accumulates accumulating in a fuel path during parking of the car of evaporation and provides their conclusion in an inlet path for burning in the course of normal functioning of the engine, preventing thereby atmosphere pollution by petrol steams. System improvement is made continuously in process of toughening of requirements shown to environment protection.

The system structure includes the adsorber filled with activated coal, the electromagnetic valve of management of an adsorber purge, the valve отсечки fuel (запорный the valve), the double-thread valve and connecting lines.

Fuel evaporations accumulating in a tank are deduced in a coal adsorber on испарительным to lines. The zapornyj valve is built in fuel lines.

Management of functioning of the valve of a purge of an adsorber carries out ECM, choosing the moment optimal for a purge, proceeding from working parametres of the engine, and also the information delivered by gauges of temperature and the expense of fuel.

The electromagnetic valve of management is included by pressure in испарительную a line of a fuel tank and serves for the pressure/depression control in a tank on the basis of the signals which are given out on ECM established in tank by the gauge of pressure.

The valve отсечки fuel (запорный the valve)

Design запорного the fuel valve

1 — To a coal adsorber
In — the Valve is opened

With — the Valve is closed


Safety valve design () covers of a jellied mouth of a fuel tank

1 — the Sealant
2 — the Spring

3 — the Valve


Design of the coal adsorber used on models with OBD II

1 — the Filter
2 — the Activated coal
3 — the Spring
And — To the electromagnetic valve of management of a purge

In — From a fuel tank
With — Air


Design of the coal adsorber used on models 2.0 and 2.5 l with OBD Subaru

1 — the Filter
2 — the Activated coal
And — To the electromagnetic valve of management of a purge

In — From a fuel tank
With — Air


Design of the electromagnetic valve of a purge of an adsorber on models 2.0 and 2.5 l

1 — To an adsorber

In — To the inlet pipeline/case of a throttle


Design of the electromagnetic valve of a purge of an adsorber on l models 3.0

1 — To an adsorber

In — To the throttle case


Design of the double-thread valve established on models with OBD II

1 — the Valve
And — Atmospheric pressure

In — To a coal adsorber
With — From a fuel tank


Design of the double-thread valve established on models with OBD Subaru (models 2.0 and 2.5)

1 — the Valve
2 — the Case
3 — the Cover
4 — the pressure Valve

5 — the Spring
And — To a coal adsorber
In — From a fuel tank

The zapornyj valve is built in directly in испарительную a tube of a cover of a fuel tank. Lifting of level of fuel in a tank leads to aperture lock-out in a cover, leaving it a unique exit through испарительную a tube in a coal adsorber.

Cover of a jellied mouth of a fuel tank

The jellied mouths built in a cover the safety valve serves for formation prevention in a tank of excessively deep depression owing to passableness infringement испарительных lines.

In normal conditions the cover closes a mouth absolutely tightly at the expense of the rubber consolidation pressed on all perimetre of a mouth, and also thanks to that the valve () remains densely pressed by a spring to the saddle.

At increase of depth of depression in a tank atmospheric pressure wrings out a spring downwards that leads to valve opening. As a result pressure is levelled because in a tank external air gets.

Coal adsorber

The coal adsorber is filled by the activated coal and serves for time accumulation of fuel evaporations and is blown on signal ECM at opening of the special electromagnetic valve (see more low). From an adsorber fuel evaporations arrive in the inlet pipeline then are burnt in the course of normal functioning of the engine. The design of a coal adsorber is presented on illustrations.

The electromagnetic valve of management of a purge of a coal adsorber

The valve is included in испарительную a line connecting an adsorber with the inlet pipeline (models 2.0 and 2.5 l with OBD II) / the throttle case (models 2.0 of l and 2.5 with OBD Subaru and models 3.0) and located from the bottom party of the pipeline. Management of a purge carries out ECM, leaning against the data about current operational parametres (temperature of a cooling liquid, engine turns, speed of movement, etc.). The purge is made at the started engine, except for certain conditions, such, for example, as work on single turns. The valve design is shown on illustrations.

The double-thread valve

The double-thread valve is included in испарительную a line connecting a coal adsorber with a fuel tank. The valve design is shown on illustrations. When pressure in a tank exceeds some established value developed by a spring effort, the valve is overcome also opens, thus being in a tank under the pressure of evaporation are taken away in an adsorber where accumulate in a time наполнителя.

At lowering of pressure the valve is closed, however air getting into system through entrance port of an adsorber, continues to get into a tank through a small aperture in a valve end face, preventing formation of excessive depression.

Vacuum path

The scheme of a lining of vacuum lines is presented on illustrations.

 The detailed scheme of a lining of vacuum lines is presented on label VECI of each car, - in case of different interpretations preference it is necessary to give information VECI.


The scheme of a lining of vacuum lines on models 2.0 and 2.5 l equipped with system of onboard diagnostics OBD II

1 — a pressure Regulator
2 — the throttle Case
3 — the Electromagnetic valve of management of an adsorber purge
4 — the Electromagnetic valve подмешивания air to injectors
And — Hoses

In — Tubes
With — To a coal adsorber
D — the Direction forward on the car


The scheme of a lining of vacuum lines on models 2.0 and 2.5 l equipped OBD Subaru

1 — a pressure Regulator
2 — the throttle Case
3 — the Electromagnetic valve of management of an adsorber purge
And — Hoses

In — Tubes
With — To a coal adsorber
D — the Direction forward on the car


The scheme of a lining of vacuum lines on l models 3.0 (OBD II)

1 — the throttle Case
2 — a pressure Regulator
3 — the Induction valve of system подмешивания air
4 — the Electromagnetic valve of management of an adsorber purge
5 — the Control valve

6 — the Operating electromagnetic valve of system подмешивания air
And — Hoses
B — Tubes
With — To a fuel tank


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