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


6.6. System of catching of vapors of gasoline


System of catching of vapors of gasoline

A. Stopper of a jellied mouth
B. Control valve
S. Termopnevmoklapan
D. A tank with an absorber
E. Channel P

Operating mode of valves

In a tank the increased depression
In a tank elevated pressure
It is above 54 °C
It is below 35 °C
State termopnevmo-
It is open
It is closed
Provision of a butterfly valve
The gate connects channel P to the inlet highway
The gate closes channel P
Control valves of a tank
It is closed
It is open
It is open
It is closed
It is open
It is closed
Control valve of a jellied mouth
Mode of removal of vapors of gasoline
Purge of the fuel tank
Couples from a tank are absorbed in a tank
Couples from a tank with an absorber go to the inlet highway
Couples from a tank are absorbed in a tank

This system is intended for catching of vapors of gasoline in the fuel tank, in the camera of a butterfly valve and the soaking-up collector, thereby preventing their hit in the atmosphere in the form of hydrocarbons.

The system consists of a tank with an absorber (absorbent carbon), the pipelines connecting an absorber to the fuel tank, a thermopneumatic valve and the control valve.

On the idle engine of couple of gasoline get to an absorber from a tank and the camera of a butterfly valve where there is their absorption. At start of the engine the tank with an absorber is blown by a stream of the air which is soaked up by the engine, couples are fond of this stream and are burned up in the combustion chamber.

The tank is equipped with three ball valves assembled in the uniform case. Depending on power setting and pressure in the fuel tank ball valves connect or separate a tank with a thermopneumatic valve (which is included consistently with the camera of a butterfly valve).


1. Such malfunctions in system as failure of the control valve, damage of a tank with an absorber, stratification or cracking of hoses, the wrong accession of hoses, lead to unstable work idling and to deterioration in traction qualities of the engine. Check a condition of laying of a stopper of a jellied mouth of a tank (see subsection 5.7).
2. Obvious loss of gasoline or a smell of gasoline in salon can be caused by leakage of fuel pipes, cracks or other damages of a tank with an absorber, failure of the control valve, and also a detachment, the wrong accession, perezhatiy, a mastication or mechanical damage of connecting hoses.
3. Check a condition of each hose connected to a tank, surveying a hose on all length. If necessary replace a hose.
4. Check whether there are dribbles of gasoline in the lower part of a tank. If there is a leak, then replace a tank and check a condition of hoses and correctness of their connection.
5. Examine a tank. At detection of cracks or mechanical damages replace a tank.
6. Check purity of the filter and serviceability of the control valve. Give to a tube for a tank purge air under small pressure. Air has to pass freely from other tubes. Otherwise replace a tank.
7. Check work of a thermopneumatic valve. On completely cooled down engine give the manual pump air to channel A. The thermopneumatic valve should not pass air. Warm up the engine up to the temperature not below 55 °C. Now the valve has to pass air. Otherwise replace a thermopneumatic valve.

Replacement of a tank with absorbent carbon

1. Disconnect hoses from a tank, previously having marked them.
2. Turn off fastening bolts, give a tank together with an arm down, disconnect hoses from the control valve and remove a tank from the car.
3. Installation is carried out upside-down.