Toyota Corolla

1992-1998 of release

Repair and operation of the car



Toyota Corolla
+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engines
+ 4. Cooling systems, heating
+ 5. Fuel, exhaust systems
- 6. System of decrease in toxicity
   6.1. Specifications
   6.2. Electronic control system
   6.3. Electronic control unit
   + 6.4. System of onboard diagnostics
   + 6.5. Sensors of system of automatic control of the engine
   6.6. System of catching of vapors of gasoline
   6.7. System of recirculation (EGR system)
   6.8. System of compulsory ventilation of a case (PCV system)
   6.9. Catalytic converter
+ 7. Transmissions
+ 8. Coupling and half shafts
+ 9. Brake system
+ 10. Suspension bracket and steering
+ 11. Body
+ 12. Electric equipment



6. System of decrease in toxicity

GENERAL INFORMATION

Structures of systems of decrease in toxicity and engine management (for engines of 1,8 l)

1. Sensor of an angle of rotation of a cranked shaft
2. The sensor of absolute pressure on the soaking-up collector (MAP sensor)
3. Electropneumatic valve (EGR systems)
4. Vacuum distributor of EGR system
5. Valve of recirculation of EGR system
6. Sensor of an angle of rotation of a butterfly valve
7. Diagnostic socket
8. The resonator of the soaking-up collector
9. Control air valve of idling (IAC)
10. Sensor of concentration of oxygen

Information label of VECI

In information label of VECI such important data as type of the system of decrease in toxicity installed on the car, frequency of turns of idling and data on installation of the moment of ignition are specified.

Scheme of distributing of vacuum hoses

On a label the scheme of distributing of vacuum hoses also contains.

The cars considered in this manual are equipped with several systems of decrease in toxicity of exhaust gases. Concrete execution of system of environment protection is defined by the territory of sale of the car (cm. rice. Structures of systems of decrease in toxicity and engine management (for engines of 1,8 l)). Treat the specified systems:
       – system of compulsory ventilation of a case PCV system);
       – system of catching of vapors of gasoline (EVAP system);
       – system of recirculation of exhaust gases (EGR system);
       – threefold catalytic converter (TWC);
       – system of electronic injection of fuel (EFI system).

Sections of this chapter consist of the general description, the description of methods of checks which it is possible to execute independently, and descriptions of a replacement procedure of details of the specified systems (at possibility of replacement).

Before drawing a conclusion on malfunction of system of decrease in toxicity carefully check work of fuel system (see section 5) and systems of ignition (see subsection 3.3.4). For diagnostics of some devices of system of decrease in toxicity certain skills, and also special tools and the equipment are required. If it becomes clear that check and repair of system cannot be executed independently, address in a workshop of car service of the dealer, or in a specialized workshop.

It, however, does not mean that service and repair of system of decrease in toxicity is difficult and remote procedure. You can quickly and easily execute a set of checks and procedures for periodic service of systems by means of a standard tool kit and measuring devices.


Prevention

The most common cause of malfunctions in system of decrease in toxicity are caused by easing or damage of electric sockets or vacuum hoses therefore first of all check a condition of these details.


Strictly observe all precautionary measures specified in this Chapter. It should be noted that appearance and an arrangement of devices on your car can differ from represented on pictures because of the annual changes made by the manufacturer. The cars realized in some territories are completed with information label about type and the structure of system of decrease in toxicity (VEC label), and also the scheme of the distributing of vacuum hoses pasted on cowl inside (see rice. Information label and rice. Scheme of distributing of vacuum hoses). The label contains standard data on the main harmful components released into the atmosphere and the description of an order of adjustment of various units. Also the scheme of distributing of vacuum hoses with designation of elements of system of decrease in toxicity is provided. At service of the engine or systems of decrease in toxicity, standard data of a label always should be verified with the last accepted standards.








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