LEXUS RX 300

1998 — 2003 of release

Repair and operation of the car



Lexus RX 300
+ Lexus RX-300 cars
- Governing bodies and methods of operation
   + Access, protection
   - Elements of security systems
      General information
      Seat belts
      Transportation of children
      Adjustment of seats and head restraints
      System of additional safety (SRS)
      Danger of poisoning with monoxide of carbon (CO)
   + Car equipment, arrangement of devices and governing bodies
   + Devices of ensuring comfort
   + Methods of operation and auxiliary systems
+ Settings and routine maintenance of the car
+ Engine
+ Cooling systems of the engine, heating, ventilation and air conditioning
+ A power supply system and production of the fulfilled gases
+ Systems of electric equipment of the engine
+ Automatic transmission and interaxal differential
+ Transmission line
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Schematic diagrams of electric connections


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System of additional safety (SRS)

In this section only general provisions concerning the principles of functioning of the SRS system are considered. The detailed description of its components is provided in the Head Onboard electric equipment.


Have no firm or sharp objects between the body and safety cushions, you do not transport firm or sharp objects on a lap and you do not smoke a pipe when driving since it can lead to receiving severe injuries at accident. For the purpose of prevention of risk of unauthorized operation of safety cushions try not to press hands to the locations of pillows and their modules. The locations of safety cushions are noted by the inscriptions "AIRBAG".

Enter number of devices and components of system of additional safety (SRS):

  • Two forward and two side safety cushions. The module of a forward driver's safety cushion is placed in a nave of a steering wheel; the safety cushion of the forward passenger is placed in a special cavity in the right part of the dashboard of the car. Side safety cushions are placed in outer sides of backs of front seats;
  • The sensors of the directed overloads working at strong front or side blow;
  • Electronic system of self-diagnostics which at the included ignition provides continuous testing of sensors of overloads, the control unit, gas generators of pillows, pyros of emergency natyazhitel of seat belts and a connecting electrical wiring of the corresponding chains;
  • The automatic emergency natyazhitel of seat belts who are built in in regular natyazhitel of seat belts of front seats;
  • The control lamp of SRS which is built in in a combination of devices;
  • The spare independent power supply intended for duplication of the main power supply system in case of its exit out of operation during collision.

Principle of functioning of safety cushions

At weak frontal and side crashes, and also when capsizing the car of a safety cushion should not work.

Sensors of the directed overloads react to excess of some extreme value which can arise at strong head-on or side crash. On a signal of sensors the control unit includes gas generators of safety cushions, causing their instant filling.

During collision the seat belt holds the lower part of the trunk sitting from shift. Forward safety cushions help to prevent traumatizing the driver and forward passenger as a result of blow by their head and a thorax about a steering wheel / dashboard or heading about bodies/glasses of doors are resistant.

Both forward safety cushions work at the same time, as well as both side pillows. However the probability of operation of only one of couple of pillows is not excluded, - it becomes possible when the size of the directed overloads which arose at collision was on the verge of the range of sensitivity of sensors. In this case seat belts provide rather reliable protection of the driver and forward passenger while the effect of operation of a safety cushion is minimum.

Right after operation and performance by pillows of the functions gas from them is produced that allows the driver to keep visibility and to manipulate freely all governing bodies of the car.

The full duration of process takes with sensors of overloads before production of gas from pillows no more tenth fraction of a second the moment of giving of a signal. Operation of modules happens so quickly that the human ear simply is not capable to apprehend cotton of gas generators when filling pillows.

After operation of safety cushions the volume of interior of the car looks slightly smoke-filled because of a suspension of fine powder which usually pours the put covers of pillows. People with a disease of respiratory organs can feel a certain discomfort from the gaseous products which are contained in air allocated by gas generators of pillows.

Control lamp of SRS

The Control Lamp (CL) of SRS is built in in a combination of devices of the car (see Kombinition's Section of devices, measuring instruments, control lamps and indicators).

At inclusion of ignition To/L lights up approximately for 6 seconds and then dies away, confirming serviceability of functioning of all knots of the SRS system.

If the lamp is not switched off, does not die away, and also at any operation To/L at any other moment follows the owner of the car at the first opportunity to address experts HUNDRED since at the listed above signs the SRS system can refuse during failure of the car. If To/L does not die away, it indicates malfunction of forward safety cushions; if To/L begins to blink, side safety cushions and/or emergency natyazhitel of seat belts are faulty.

Seat belts with automatic emergency natyazhitel

Emergency automatic natyazhitel equipped returnable devices of seat belts of front seats. Are put by Natyazhiteli in action at the strong frontal overloads arising at head-on collision and provide instant selection of a weak point of belts therefore tapes of the last densely cover a body sitting, in considerably degree increasing degree of protection of the driver and forward passenger.

Natyazhitel is built in in assembly of the returnable mechanism of a belt. The order of use of such seat belts is similar to an order of use of the usual belts equipped with inertial returnable devices. The mechanism of operation of a natyazhitel is absolutely transparent for the user and does not demand from the last any additional skills and knowledge.

Activation of natyazhitel happens only at considerable frontal overloads. Operation of modules is followed by loud cotton and small emission of smoke.

The smoke which is emitted at operation of natyazhitel is safe for health of the person, however at direct inhalation can cause irritation of mucous membranes.

As well as in case of safety cushions, modules of emergency natyazhitel are calculated on single operation and after that are subject to replacement assembled with belts, - address on HUNDRED.