1998 — 2003 of release

Repair and operation of the car

Lexus RX 300
+ Lexus RX-300 cars
+ Governing bodies and methods of operation
+ Settings and routine maintenance of the car
+ Engine
- Cooling systems of the engine, heating, ventilation and air conditioning
   + Engine cooling system
   - Systems of heating, ventilation and air conditioning
      General information
      Replacement, dismantling and assembly of the K/V block
      Removal, dismantling, assembly and installation of the block of the fan of a heater
      Check and replacement of the compressor and K/V magnetic coupling
      Removal and installation of the K/V condenser
      Checks of components of systems of heating and To/in
      Removal and installation of the control unit
+ 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


Replacement, dismantling and assembly of the K/V block

Components of installation of the K/V block

1 — the Intensifying bar
2 — Nizhny Novgorod a heater branch pipe
3 — the Liquid tube
4 — the Soaking-up tube
5 — the Water hose
6 — the heater fan Block
7 — the Sealing ring

8 — an electrical wiring Plait
9 — the Air duct
10 — the Central air duct from a heater to the gate
11 — the K/V Block
12 — a console No. 1 box Air duct
13 — the Holder No. 1
14 — the Holder No. 2

Components of assembly of the K/V block

1 — an electrical wiring Plait
2 — Consolidation
3 — the Connecting flange of tubes
4 — the Sealing ring
5 — the Broad valve
6 — Tubes and fittings
7 — the Arm
8 — the evaporator temperature Sensor
9 — Plastina of an arm
10 — the Air duct

11 — the Evaporator
12 — the Cover
13 — the Isolating pallet
14 — Э / the air mixing motor
15 — Э / the motor of production of air
16 — the Drain hose
17 — a heater Radiator
18 — the Relay э / the heater motor
19 — the Casing



  1. Discharge the К/В coolant contour.
  2. Empty an engine cooling system radiator (see the Section Replacement of the Cooling Liquid (CL)).

To empty the engine cooling system completely there is no sense.

  1. Remove levers and э / the motor of screen wipers, the left and right fairing of a windshield, a cowl and the dashboard with an intensifying bar (see the Head Kuzov).
  2. Disconnect the liquid and soaking-up tubes from the K/V block.
  3. Disconnect water hoses from heater heat exchanger tubes.
  4. Remove the heater fan block (see the Section Removal, dismantling, assembly and installation of the block of the fan of a heater).
  5. Wring out two clamps and disconnect the lower branch pipe of a heater from the central air duct.
  6. Remove a console No. 1 box air duct.
  7. Separate the socket, turn out two bolts and two nuts and remove the К/В block.

Dismantling and check


  1. Separate the electrical wiring socket, turn out two screws and remove э / the motor of production of air.
  2. Remove a plait of an electrical wiring and an arm.
  1. Turn out two screws, remove two plates and pull out the heater heat exchanger.
  1. Remove the relay э / the heater fan motor.
  2. Turn out two screws and remove э / the air mixing motor.
  3. Separate the evaporator temperature sensor socket, weaken sensor clamps on a plate of an arm and remove the sensor.
  4. Remove the broad valve and as soon as possible to a zakuporta its adjusting flange.
  5. Remove an air duct from the driver.
  6. Turn out bolts of fastening of tubes to the evaporator and remove tubes with fittings.
  7. Turn out 7 screws and uncover the evaporator. Extend the evaporator.
  8. Check and if necessary clean cells of an ispravitel and the heat exchanger of a radiator compressed air.
  9. Check serviceability of functioning driving э / motors.

Assembly and installation


  1. Assembly and installation are made as it should be, the return to an order of dismantle of components. Pay attention to the next moments:
    • Use new sealing rings on connections of refrigerator lines with the K/V block, and also tubes with the broad valve and with the evaporator.
    • Collars of fastening of water hoses to the heat exchanger establish at distance from 1 to 7 mm from the end of a hose.
    • Level a tag on a drain hose.

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