LEXUS RX 300
1998-2003 of release
Repair and car operation
Lexus RX 300
+ Cars Lexus RX-300
+ Controls and operation receptions
+ Options and car routine maintenance
+ The engine
- Systems of cooling of the engine, heating, ventilation and air conditioning
+ System of cooling of the engine
- Systems of heating, ventilation and air conditioning
The general information
Replacement, dismantling and block K/V assemblage
Removal, dismantling, assemblage and installation of the block of the fan of a heater
Check and replacement of the compressor and magnetic coupling К/В
Removal and condenser K/V installation
Checks of components of systems of heating and К/В
Removal and installation of the block of management
+ The power supply system and release of the fulfilled gases
+ Systems of an electric equipment of the engine
+ Automatic transmission and interaxal differential
+ Transmissionnaja line
+ Brake system
+ Suspension bracket and steering
+ Onboard electric equipment
+ Basic schemes of electric connections
Systems of heating, ventilation and air conditioning
The description of systems
The heating system consists of the fan and the heat exchanger located in the uniform block. Hot ОЖ passes through the heat exchanger. At moving of the handle of management by modes of the heater, located on the panel of devices, opens заслонка, and hot air starts to arrive in car salon. If to include the heater fan, air will move in salon more intensively. The fan can work with different degree of intensity. For possibility of rotation of the fan with various speed the resistor is established. At closed заслонке ОЖ arrives on a small contour back in a contour of a radiator of the engine.
Components of system of heating and К/В in salon
Before getting to salon, air passes through the filter in which the basic share of a dust settles. It is necessary to observe periodicity of replacement of the filter since the filter hammered by a dust limits air giving that will lead to a stagnation of air in salon.
Distribution of streams of air of system of ventilation is carried out also with the help заслонок. On all models the air circulation mode is provided.
Air central air (К/В) enters into a standard complete set of cars considered in the present Management.
Works with system K/V should be carried out in a specialised workshop. Do not open a contour of circulation of a coolant as at contact with a skin the coolant can cause обморожение. Procedures of repair of system K/V in the present Management are not considered.
By means of system K/V air temperature in salon can lower concerning external temperature. At work of system humidity in salon decreases. In the crude weather, arriving fresh air preliminary it is cooled, then again heats up to the set temperature. Thus its drainage is made. By means of this procedure it is possible to get rid from запотевания glasses.
System K/V consists of the compressor, the condenser, the evaporator, capacity with a coolant and pipelines. In system the coolant (type R134а) which depending on temperature and pressure can be in liquid or a gaseous state circulates.
System K/V components in an impellent compartment
The conditioner compressor is resulted by a multiridge belt from a cranked shaft of the engine. He creates pressure in a contour of the coolant representing gas, and causes its heating. In the condenser the coolant is cooled by external air. Thereof разогретый the coolant is condensed, turning to a liquid. Under a high pressure it is passed through the valve therefore its pressure falls. After that the coolant evaporates in a contour, simultaneously strongly being cooled. In the evaporator the coolant selects heat from air blown through it. Thereof air is cooled. Cooled air arrives in car salon. As a result of heating in the evaporator the coolant turns to gas and under low pressure arrives in the compressor then circulation process repeats.
Security measures at service К/В
System K/V should be served by exclusively prepared technicians trained in safe working methods with application of the appropriate equipment and with observance of rules of depressurization, and also acquainted with receptions of gathering and storage of an automobile coolant.