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LEXUS RX 300

1998 — 2003 of release

Repair and car operation



RX 300 Lexus
+ Lexus RX-300 Cars
- Governing bodies and operation receptions
   + Access, protection
   - Elements of systems of safety
      General information
      Seat belts
      Transportation of children
      Adjustment of seats and head restraints
      System of additional safety (SRS)
      Danger of poisoning with carbon (CO) monooxide
   + car Equipment, arrangement of devices and governing bodies
   + Devices of ensuring comfort
   + Receptions of operation and auxiliary systems
+ Settings and routine maintenance of the car
+ Engine
+ Systems of cooling of the engine, heating, ventilation and air conditioning
+ the 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



System of additional safety (SRS)

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


Have no firm or sharp subjects between the body and safety cushions, do not transport firm or sharp subjects on a lap and do not smoke a pipe when driving since it can lead to receiving heavy traumas at failure. 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 "AIRBAG" inscriptions.

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

  • Two lobbies and two lateral 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. Lateral safety cushions are placed in outer sides of backs of forward seats;
  • The sensors of the directed overloads working at strong front or lateral 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, пиропатронов emergency natyazhitel of seat belts and connecting electroconducting of the corresponding chains;
  • The automatic emergency natyazhitel of the seat belts who have been built in in regular natyazhitel of seat belts of forward seats;
  • The control lamp of SRS which has been 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 face-to-face and lateral collisions, and also when capsizing the car of a safety cushion should not work.

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

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

Both lobbies of a safety cushion work at the same time, no less than both lateral pillows. However the probability of operation only is not excluded by one of pair of pillows, is becomes possible when the size of the directed overloads which have arisen at collision was on the verge of a range of sensitivity of sensors. In this case seat belts provide rather reliable protection of the driver and the forward passenger while the effect from operation of a safety cushion will be minimum.

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

Full duration of process from the moment of giving of a signal before production of gas from pillows borrows with sensors of overloads no more the tenth fraction of a second. Operation of modules occurs 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 salon of the car looks slightly filled with smoke because of a suspension of a tonkodispersny powder by which the combined covers of pillows are usually poured. People with a disease of respiratory organs can feel a certain discomfort from the gaseous products containing in air allocated by gas generators of pillows.

Control lamp of SRS

The control lamp (To/l) SRS is built in in a combination of devices of the car (see. Kombinitsy's section of devices, measuring instruments, control lamps and indicators).

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

If the lamp is not switched off, does not die away, and also at any operation To/l during any other moment the owner of the car should address at the first possibility to experts HUNDRED since at the signs listed above the SRS system can refuse during car failure. If To/l does not die away, it indicates malfunction of forward safety cushions; if To/l starts to blink, lateral 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 forward seats. By Natyazhiteli are put in action at the strong face-to-face overloads arising at a head-on collision, and provide instant sample of a weak point of belts therefore tapes of the last densely cover a body sitting, in considerably degree raising extent of protection of the driver and the forward passenger.

Natyazhitel is built in in assembly of the returnable mechanism of a belt. The order of using such seat belts is similar to an order of using 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 occurs only at considerable face-to-face overloads. Operation of modules is accompanied by loud cotton and small emission of a smoke.

Being allocated at operation of natyazhitel the smoke 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.