Subaru Legacy

since 1990-1998 release

Repair and operation of the car



Subaru Legacy
+ 1.1. Identification numbers
+ 2. Maintenance
+ 3. Engines
+ 4. Heating, ventilation
+ 5. Fuel system
- 6. Exhaust system
   6.1. Service of final system
   - 6.2. Reduction of toxicity of exhaust gases and management of operation of the engine
      6.2.1. Technical characteristics
      6.2.2. System of self-diagnostics (OBD) and codes
      6.2.3. Block of electronic control (ECM)
      6.2.4. Sensor of temperature of cooling liquid
      6.2.5. Sensor of provision of a butterfly valve
      6.2.6. Sensors of a bent shaft, camshaft, car speed
      6.2.7. Oxygen sensor
      6.2.8. Air stream sensor
      6.2.9. Detonation sensor
      6.2.10. Pressure sensor in an inlet collector
      6.2.11. Replacement of the sensor of temperature of cooling liquid
      6.2.12. Replacement of the sensor of a stream of air
      6.2.13. Replacement of the sensor of oxygen
      6.2.14. Replacement of the sensor of provision of a butterfly valve
      6.2.15. Replacement of the sensor of an angle of rotation of a bent shaft
      6.2.16. Replacement of the sensor of position of the camshaft
      6.2.17. Replacement of the sensor of a detonation
      6.2.18. Replacement of the sensor of speed of the car
      6.2.19. Replacement of the sensor of pressure
      6.2.20. System of repeated combustion of exhaust gases (EGR)
      6.2.21. System of catching of vapors of fuel (EVAP)
      6.2.22. System of compulsory ventilation of a case (PCV)
      6.2.23. Catalyst
+ 7. Systems of start, ignition
+ 8. Transmissions
+ 9. Coupling, shaft
+ 10. Brake system
+ 11. Suspension bracket
+ 12. Steering
+ 13. Body
+ 14. Electric equipment






6.2. Reduction of toxicity of exhaust gases and management of operation of the engine

GENERAL INFORMATION

Arrangement of elements of system of reduction of toxicity of exhaust gases and management of operation of the engine in a motor compartment


1 – detonation sensor
2 – valve of system of repeated combustion of exhaust gases (EGR)
3 – sensor of position of the camshaft
4 – sensor of provision of a bent shaft
5 – valve of ventilation of a case of the engine (PCV)
6 – pressure sensor
7 – air stream sensor
8 – throttle sensor
9 – sensor of temperature of cooling liquid

Information plate

The plate with information on system of reduction of toxicity of exhaust gases and with the scheme of passing of vacuum hoses is located under a cowl.

For reduction of pollution of the atmosphere from the remains several systems of reduction of toxicity of exhaust gases are available incompleteness of the burned-down fuel and exhaust gases, for achievement of optimum power setting and economy of fuel in the car:

 – system of repeated combustion of exhaust gases (EGR);
 – system of catching of vapors of fuel (EVP);
 – multipoint system of injection of fuel (MPFI);
 – system of compulsory ventilation of a case (PCV);
 – catalyst.

The general description of the operations which are in competence of the motorist on check and replacement of some details is provided in this section.

Before to draw conclusions about malfunction of toxicity of exhaust gases, any of systems of reduction, carefully check fuel system and system of ignition. Definition of malfunctions of some of devices of reduction of toxicity demands special devices and experience.