Toyota Land Cruiser 100/Amazon, Lexus LX 470

since 1997 release

Repair and operation of the car

Toyota Land Cruiser, Amazon, Lexus LX470
+ Identification numbers of the car
+ Governing bodies and methods of safe operation of the car
+ Settings and routine maintenance of the car
+ Engine
+ Cooling systems of the engine, heating of salon and air conditioning
+ A power supply system and production of the fulfilled gases
+ Engine electric equipment
- Control systems of the engine and decrease in toxicity of the fulfilled gases
   Specifications
   System of onboard diagnostics (OBD) - the principle of functioning and codes of malfunctions
   Application of an oscillograph for observation of working signals of a control system
   Check of a state and replacement of ESM
   Information sensors - the general information and check of serviceability of functioning
   Replacement of information sensors
   System of catching of fuel evaporations (EVAP) - the general information, check of a state and replacement of components
   System of the operated ventilation of a case (PCV)
   The catalytic converter - the general information, check of a state and replacement
+ Gear shifting box
+ Transmission line
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment

System of catching of fuel evaporations (EVAP) – the general information, check of a state and replacement of components

General information

Typical scheme of an arrangement of components of the EVAP system

The EVAP system accumulates the fuel evaporations accumulating in a power supply system during the parking of the car and provides a conclusion them to the inlet highway for burning in the course of normal functioning of the engine (address illustrations above). Improvement of system is made continuously in process of toughening of requirements imposed to environment protection.

On models of early years of release the EVAP system consisted of the coal adsorber equipped with the control valve and lines of communication connecting it to the fuel tank of the car. Also the sensor of temperature of cooling liquid (EST), the vacuum valve switch (VSV) and the module of management (ESM) were a part of system. On models of the last years of release the structure of system switched in addition on the sensor of pressure of fuel evaporations installed on a back partition of a motive compartment. The scheme of an arrangement of components is submitted on an illustration. The sensor of pressure monitors the changes of pressure in system connected with development of leaks. The fuel tank, all vacuum lines brought to an adsorber and the case of a throttle are among the components which are subject to monitoring. EVAP is a part of system of onboard diagnostics of OBD-II (see the Sections System of Onboard Diagnostics (OBD) - the principle of functioning and codes of malfunctions and Information sensors - the general information and check of serviceability of functioning) and check of serviceability of its functioning on models of the last years of release, respectively, requires the special scanner.

The composition of the EVAP system can vary depending on a year of release of model. The scheme of laying of vacuum hoses is submitted on the special information label of VECI fixed in a motive compartment of the car.

During the parking of the car fuel evaporations are taken away from cavities of a gasoline tank and the case of a throttle in a coal adsorber where accumulate till engine launch. When the engine begins to rotate, the adsorber is blown and its contents are removed in the inlet pipeline from where comes to combustion chambers.

The coal adsorber is equipped with the control valve which design two balls enter. Depending on the current service conditions of the engine and pressure in the fuel tank the valve opens and closed, regulating process of removal of vapors of fuel of a tank and the case of a throttle.

Check

Full diagnostics of the EVAP system is among the procedures lying outside qualification of the average amateur mechanic and its performance has to be entrusted to specialists of car service. It is necessary to notice that additional federal guarantees extend to components of system. Most often failures of the system of EVAP are connected with damages of a coal adsorber or connecting lines.

Violation of stability of turns of idling, decrease in efficiency of return of the engine, spontaneous stops of the last can be caused by failure of the control valve, damage of a coal adsorber or connecting hoses of the EVAP system, and also the wrong laying of the last. Check also a condition of a cover of a jellied mouth of the fuel tank.

Obvious losses of fuel, as well as emergence of its strong smell during the parking can be caused by leakages of fuel-supply lines, or damage of the case of a coal adsorber, malfunction of the control valve, a detachment, or violation of passability of vaporizing lines, and also the wrong laying of the last.

PERFORMANCE ORDER

1. Check a state, a route of laying and reliability of connection of all hoses of the EVAP system. Make necessary repair or replacement. The damaged components.
2. Examine the adsorber bottom on existence of signs of development of leaks, in case of need make replacement, track correctness of connection of hoses.

3. Disconnect vacuum hoses from the top part of an adsorber (address an accompanying illustration). A, B and C unions also give to Zakuporta air pressure no more than 0.1 atm. in the union D. Make sure that air does not come out via the union F.

4. Create discharge (no more than 0.1 atm.) on the union C also check that it does not fall if to open the union F.
5. Having closed the union F, create discharge (no more than 0.1 atm.) on the union D also check that it does not fall if the union C is closed and falls if to open it.
6. The faulty adsorber is subject to replacement.

Replacement of a coal adsorber

PERFORMANCE ORDER

1. Having previously carefully marked, disconnect all vacuum lines from an adsorber.
2. Turn out fixing bolts and remove assembly of an adsorber.
3. Installation is made upside-down.