LEXUS RX 300

1998 — 2003 of release

Repair and car operation



RX 300 Lexus
+ Lexus RX-300 Cars
+ Governing bodies and operation receptions
+ Settings and routine maintenance of the car
+ Engine
- Systems of cooling of the engine, heating, ventilation and air conditioning
   - System of cooling of the engine
      General information and precautionary measures
      Removal, check and installation of the water pump
      Removal, check and thermostat installation
      Check of components of system of cooling
      Removal and installation of a radiator and fans
   + Systems of 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



Check of components of system of cooling

Check of a cover of a radiator

 PERFORMANCE ORDER

  1. Establish on a radiator cover the special pump tester and, holding it at an angle not less the 30th hail. to the horizon, create constant pressure, making one pressing in not less, than 3 seconds. Make sure that passes air through the vacuum valve, otherwise replace a radiator cover.
  1. Under the same conditions create pressure of 0.9 ÷ 1.2 atm – the safety valve should open. If the valve does not open even at pressure of 0.75 atm, replace a radiator cover.

Check on leaks

 PERFORMANCE ORDER

  1. Fill a radiator with cooling liquid and establish on his mouth the pump tester. Warm up the engine to working temperature, create by means of the pump pressure of 1.2 atm and make sure that it does not fall. Otherwise check hoses of system of cooling, a radiator and the water pump on existence of leaks. If external leaks are not found, check the heater heat exchanger, the block and a head of cylinders. Eliminate leaks.

Check of fans

 PERFORMANCE ORDER

  1. Start the engine and make sure of turning on of fans at achievement of OZh of temperature the 98th hail. Otherwise replace Д/В No. of 1 ECT.
  1. Separate sockets of electroconducting of fans, submit on them tension of the battery and connect to them ampermeters. Make sure of smoothness of rotation of fans and compare indications of ampermeters to requirements of Specifications of the Head of System of cooling of the engine, heating, ventilation and air conditioning.

Check Д/В of ECT

 PERFORMANCE ORDER

  1. Empty system of cooling and remove Д/В No. 1 and No. of 2 ECT.
Location Д/В of No. of 1 ECT.
Location Д/В of No. of 2 ECT.
  1. By means of an ohmmeter make sure available conductivity between contacts of sensors No. 1 and No. 2 at temperature is higher respectively 98 or the 94th hail . At temperature below 88 or the 83rd hail. respectively for Д/В No. 1 and No. 2 conductivity between their contacts should be absent.
Measurement of resistance Д/В of No. of 1 ECT.
Measurement of resistance Д/В of No. of 2 ECT.
  1. At unsatisfactory results of checks replace faulty Д/В.
  2. Establish Д/В, fill system of cooling of the engine and make sure of absence of leaks.

Check of the relay of fans

 PERFORMANCE ORDER

  1. Take from the relay block in an impellent compartment of the relay No. 1, No. 2 and No. of 3 fans (see. Head Onboard electric equipment).
  2. By means of an ohmmeter make sure available conductivity between contacts 3 and 5 everyone the relay, and also of lack of conductivity between contacts 1 and 2 everyone the relay. Besides, conductivity should be between contacts of 2 and 4 relays No. 2.
Contacts of the relay No. 1 and No. of 3 fans.
Contacts of the No. relay of 2 fans.
  1. Put tension of the battery to contacts 3 (+) and 5 (-) each relay (serially) and make sure available conductivity between contacts 1 and 2 everyone the relay. Besides, under these conditions conductivity should be absent between contacts of 2 and 4 relays No. 2.
  2. If checks yielded unsatisfactory results, replace faulty relays.