1998-2003 of release

Repair and car operation

Лексус 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
+ The power supply system and release of the fulfilled gases
+ Systems of an electric equipment of the engine
+ Automatic transmission and interaxal differential
+ Трансмиссионная a line
+ Brake system
+ Suspension bracket and steering
+ Body
- Onboard electric equipment
   The general information
   Diagnostics of malfunctions of an onboard electric equipment - the general information
   Safety locks - the general information
   The relay - the general information and check of serviceability of functioning
   Screen wipers and стеклоомыватели
   Replacement of lamps накаливания
   Removal and installation of a casing of a steering column and подрулевых switches
   Check of serviceability of functioning of some auxiliary systems
   Removal and aerial installation
   Removal and installation of a combination of devices
   Adjustment of an inclination of headlights
   Removal and installation of components of system SRS
   Removal and installation of components стеклоподъёмников and screen wipers
+ Basic schemes of electric connections

The relay - the general information and check of serviceability of functioning

The general information

For giving of power supplies or a management signal on some of electric power consumers in the car (such as components of system of injection of fuel, a horn, a starter, the fan of system of cooling, antifog headlights and other) are used the relay. Actually the relay represents the electric key providing short circuit В/В of a contour on a low-voltage signal. In case of a relay exit out of operation there is a refusal of functioning of the corresponding consumer. Installation sites of assembly blocks of the relay and safety locks are specified in illustrations the Arrangement of blocks of the relay and safety locks in an impellent compartment. The description of check of serviceability of functioning of the relay is resulted more low. The failed relays are subject to replacement.



  1. If it is not possible to find out a way of inclusion of the relay in a corresponding electric contour under schemes of electric connections (Basic schemes of electric connections), it is necessary to remember, that the approach to check of any relay basically is identical in all cases.
  2. In most cases the management contour always is connected to two of contact plugs of the relay. At giving on these plugs of low-voltage pressure the current starts to circulate on a winding of management of the relay therefore there is a short circuit of the big contacts of a working contour of the consumer of the electric power. Other plugs are plugs working (В/В) a contour.
  3. For the purpose of simplification of identification of plugs of the relay explanatory marks are usually put on its case with the image of the scheme of connection of keys.
  4. Before relay removal make sure, that the corresponding contour is disconnected.
  5. Connect the wire-crosspiece equipped with a safety lock between one of plugs of management of the relay and the positive plug of the battery. By means of the second wire-crosspiece earth the second plug of management, – the relay should publish click. Some relays demand obligatory observance of polarity of connection, - if click has not occurred, try to change polarity of connection of plugs of management.
  6. At the connected wires-crosspieces check up conductivity presence between contour plugs V/V, having connected an ohmmeter according to the key scheme on the relay case.
  7. At negative result of check replace the relay.