Opel Astra, Zafira

since 1998 of release

Repair and car operation



Opel Astra
+ Opel Astra and Zafira Cars
+ Operation manual
+ Routine maintenance
+ Engine
+ Systems of cooling, heating
- Power supply system and release
   + Power supply system
   - System of injection of fuel of petrol engines
      Principle of functioning of systems of injection of fuel
      Check of serviceability of functioning of system of injection of fuel
      Removal and installation of components of system of the central injection of Multec fuel
      Removal and installation of components of systems of the distributed injection of Multec-S and Simtec-70 fuel
      The monitoring system of temperature of soaked-up air (model with the central injection) - a principle of functioning and check of serviceability of functioning
      Removal and installation of the inlet pipeline
      Removal and installation of a final collector
   + Systems of injection and turbo-supercharging of the diesel engine
   + Systems of release and decrease in toxicity of the fulfilled gases
+ engine Electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment

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Principle of functioning of systems of injection of fuel

System of the central injection of Multec


Main components of system of the central injection of Multec (engines of 1.6 l of SOHC)

1 — the Sensor of provision of a cranked shaft (CKP)
2 — the throttle Case
3 — the Injector of injection of fuel
4 — the Sensor of provision of a butterfly valve (TPS)
5 — the Sensor of a detonation (KS)
6 — the Sensor of absolute pressure in the inlet pipeline (MAP)

7 — the Valve of a purge of a coal adsorber
8 — the ignition Module
9 — the EGR Valve
10 — the Lambda probe
11 — the Step-by-step engine of system of stabilization of turns of idling


(See an illustration the Main components of system of the central injection of Multec (engines of 1.6 l of SOHC)) are included into Multec system structure the following components: the catalytic converter of the closed type, system of catching of fuel evaporations (EVAP) and a retsirkulyatsiya of the fulfilled gases (EGR). By efficiency of functioning the system answers all with requirements of the international standards. The description of a principle of functioning responsible for fuel injection the engine of a part of system below is provided. Information on functioning of a subsystem of ignition is provided in Head engine Electric equipment.

Placed in a fuel tank pogruzhny the fuel pump provides supply of fuel under pressure to the fuel highway, on the way banishing it through the fuel filter established behind under the car. The pressure of supply of fuel is defined established on the throttle case by a pressure regulator. Excess of fuel on the returnable line goes back to a fuel tank.

The electric part of a control system consists of the electronic module of management (ECM) and the following information sensors:

  • The sensor of situation (potentiometer) of a butterfly valve (TPS) informs ECM on the provision of a butterfly valve;
  • The sensor of temperature of cooling liquid (ECT) informs ECM on temperature of cooling liquid of the engine;
  • The lambda probe (models for Great Britain) informs ECM on concentration of the content in the fulfilled gases of molecules About 2 (for more details see. Systems of release and decrease in toxicity of the fulfilled gases);
  • The sensor of provision of a cranked shaft (CKP) informs ECM on turns of the engine and the provision of a cranked shaft;
  • The sensor of a detonation (KS) informs ECM on emergence of signs of early ignition;
  • The sensor of absolute pressure in the inlet pipeline (MAP) informs ECM on load of the engine, tracing depth of depression in the inlet pipeline;
  • The control unit of system of anti-blocking of brakes (ABS) informs ECM on speed of movement of the car;
  • The sensor switch of central air of air (at the corresponding complete set) notifies ECM on the fact of turning on of the conditioner.

All arriving information is processed by ECM which then gives out teams of management of ignition and opening of an injector of injection of fuel. Management of an injector occurs by change of width of an operating electric opening impulse that allows with the minimum delay to make correction of structure of an air and fuel mix at change of external factors. Thanks to possibility of such adjustments return of the engine is supported at a maximum level at any stage of functioning of the unit: at start, during warming up, at acceleration, a deseleratsiya and movement with constant speed.

ECM exercises also administration of idling turns. Necessary adjustments are made by activation of the throttle of the step-by-step electric motor established on the case. The engine on the ECM teams makes opening / перекрывание the perepuskny channel, in case of need (for example, at closed or being in the provision of idling to a butterfly valve) starting up air bypassing the throttle chamber.

Besides, ECM exercises administration of functioning of system of catching of fuel evaporations of EVAP (see. Systems of release and decrease in toxicity of the fulfilled gases).

If from sensors information testifying to emergence not to an emergency situation arrives, ECM is switched in emergency operation of functioning when instead of inadequate signals base values of the corresponding parameters are substituted, - efficiency of return of the engine in such mode, naturally decreases. About ECM entrance in emergency operation of the driver prevents operation of a control lamp of refusals on an instrument guard of the car (see. Head the Operation manual), in memory of the processor is thus brought the corresponding diagnostic code (see. Head engine Electric equipment).

Under certain circumstances the behavior of the car can not change at all. The unique sign of that ECM passed to emergency operation of functioning increase of toxicity of the fulfilled gases can be. Keep in mind that after replacement of the faulty sensor on serviceable automatic return of system it will not be switched independently in a normal mode does not occur, - it is necessary to clear memory of the processor of diagnostic codes containing in it. Even if conducting break was the reason of transition of system in emergency operation safe, after her memory of the processor should be cleared.


The diagnostic DLC socket is located in the central console ahead of the lever of the parking brake under a decorative cover


Location of the DLC socket in the console

The decorative cover is removed

At operation of a control lamp the car should be driven away at the first possibility on firm car repair shop Opel for carrying out detailed diagnostics with use of the special equipment and performance of necessary regenerative repair (see illustrations the Diagnostic DLC socket is located in the central console ahead of the lever of the parking brake under a decorative cover and Location of the DLC socket in the console).

The diagnostic equipment (the input reader of skanerny type) is connected to located under a decorative slip under ahead lever of the parking brake to the DLC socket.

System of the distributed injection of Multec-S


Main components of system of the central injection of Multec-S (engines 1.4 and 1.6 of l of DOHC)

1 — the Sensor of provision of a cranked shaft (CKP)
2 — the Sensor of a detonation (KS)
3 — the EGR Valve
4 — the Sensor of provision of a butterfly valve (TPS)
5 — the Step-by-step engine of system of stabilization of turns of idling
6 — the Sensor of absolute pressure in the inlet pipeline (MAP)

7 — the Valve of a purge of a coal adsorber
8 — the ignition Module
9 — the Lambda probe
10 — the Sensor of temperature of cooling liquid (ECT)
11 — the Sensor of temperature of soaked-up air (IAT)
12 — the Sensor of provision of a camshaft (CMP)

The main components of Multec-S system (see an illustration the Main components of system of the central injection of Multec-S (engines 1.4 and 1.6 of l of DOHC)) are: the catalytic converter of the closed type, system of catching of fuel evaporations (EVAP) and a retsirkulyatsiya of the fulfilled gases (EGR). By efficiency of functioning the system answers all with requirements of the international standards. The description of a principle of functioning responsible for fuel injection the engine of a part of system below is provided. Information on functioning of a subsystem of ignition is provided in Head engine Electric equipment.

Placed in a fuel tank pogruzhny the fuel pump provides supply of fuel under pressure to the fuel highway, on the way banishing it through the fuel filter established behind under the car. The pressure of supply of fuel is defined established on the throttle case by a pressure regulator. Excess of fuel on the returnable line goes back to a fuel tank.

The electric part of a control system consists of the electronic module of management (ECM) and the following information sensors:

  • The sensor of situation (potentiometer) of a butterfly valve (TPS) informs ECM on the provision of a butterfly valve;
  • The sensor of temperature of cooling liquid (ECT) informs ECM on temperature of cooling liquid of the engine;
  • The sensor of temperature of soaked-up air (IAT) informs ECM on temperature of air soaked up in the inlet pipeline;
  • The lambda probe (models for Great Britain) informs ECM on concentration of the content in the fulfilled gases of molecules About 2 (for more details see. Systems of release and decrease in toxicity of the fulfilled gases);
  • The sensor of provision of a cranked shaft (CKP) informs ECM on turns of the engine and the provision of a cranked shaft;
  • The sensor of provision of a camshaft (CMP) informs ECM on situation and frequency of rotation of a final camshaft;
  • The sensor of a detonation (KS) informs ECM on emergence of signs of early ignition;
  • The sensor of absolute pressure in the inlet pipeline (MAP) informs ECM on load of the engine, tracing depth of depression in the inlet pipeline;
  • The control unit of system of anti-blocking of brakes (ABS) informs ECM on speed of movement of the car;
  • The sensor switch of central air of air (at the corresponding complete set) notifies ECM on the fact of turning on of the conditioner.

All arriving information is processed by ECM which then gives out teams of management of ignition and opening of an injector of injection of fuel. Management of an injector occurs by change of width of an operating electric opening impulse that allows with the minimum delay to make correction of structure of an air and fuel mix at change of external factors. Thanks to possibility of such adjustments return of the engine is supported at a maximum level at any stage of functioning of the unit: at start, during warming up, at acceleration, a deseleratsiya and movement with constant speed. Multec S is system of consecutive injection in which each of the 4th injectors of injection works at the moment of the beginning of opening of the corresponding inlet valve.

ECM exercises also administration of idling turns. Necessary adjustments are made by activation of the throttle of the step-by-step electric motor established on the case. The engine on the ECM teams makes an opening / perekryvaniye of the perepuskny channel, in case of need (for example, at closed or being in the provision of idling to a butterfly valve) starting up air bypassing the throttle chamber.

Besides, ECM exercises administration of functioning of system of catching of fuel evaporations of EVAP (see. Systems of release and decrease in toxicity of the fulfilled gases).

If from sensors information testifying to emergence not to an emergency situation arrives, ECM is switched in emergency functioning when instead of inadequate signals base values of the corresponding parameters are substituted, - efficiency of return of the engine in such mode, naturally decreases. About ECM entrance in emergency operation of the driver prevents operation of a control lamp of refusals on an instrument guard of the car (see. Head the Operation manual), in memory of the processor is thus brought the corresponding diagnostic code (see. Head engine Electric equipment).

At operation of a control lamp the car should be driven away at the first possibility on firm car repair shop Opel for carrying out detailed diagnostics with use of the special equipment and performance of necessary regenerative repair.

The diagnostic equipment (the input reader of skanerny type) is connected to located under a decorative slip ahead of the lever of the parking brake to the DLC socket (see illustrations the Diagnostic DLC socket is located in the central console ahead of the lever of the parking brake under a decorative cover and Location of the DLC socket in the console).

System of the distributed injection of Simtec-70 of h


Main components of system of the central injection of Multec-S (engines 1.8 and 2.0 of l of DOHC)

1 — the Sensor of temperature of soaked-up air (IAT)
2 — the Sensor of measurement of weight of air (MAF)
3 — the Regulator of pressure of fuel
4 — the Sensor of provision of a butterfly valve (TPS)
5 — the Sensor of provision of a cranked shaft (CKP)
6 — the Step-by-step engine of system of stabilization of turns of idling

7 — the Sensor of provision of a camshaft (CMP)
8 — the Sensor of a detonation (KS)
9 — the Valve of a purge of a coal adsorber
10 — the ignition Module
11 — the Sensor of temperature of cooling liquid (ECT)
12 — the EGR Valve

By a functioning principle the Simtec-70 system (see an illustration the Main components of system of the central injection of Multec-S (engines 1.8 and 2.0 of l of DOHC)) is almost identical to system to the Multec S system considered above. The main difference consists in use in an inlet air path instead of the MAP sensor of the sensor of measurement of weight of air (MAF) of film type on an admission. The sensor of measurement of weight of air (MAF) informs ECM on amount of the air arriving in the inlet pipeline.

One more feature of system is use of the inlet pipeline of the variable length, allowing to make increase developed by the engine on small turns of a torque. The inlet pipeline is equipped with the special valve, management of which functioning carries out ECM by means of an electromagnet and diafragmenny knot. At engine turns less than 3600 in a minute the valve remains closed, - in this case air passes on longer way, providing increase in a torque of the engine. On high turns the valve at the command of ECM opens, providing giving of depression of the pipeline on the diafragmenny knot exercising administration of functioning to four valves which operation allows in the necessary degree to reduce length of a way of passing of air on the pipeline for the purpose of increase in the traction characteristic of the engine on high turns.