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
+ 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


2598ff35



Checks of components of systems of heating and To/in

Broad valve

 PERFORMANCE ORDER

  1. Start the engine and let's it work on 1500 rpm within not less than 5 minutes then make sure that in a contour of high pressure pressure was established by 13.6 ÷ 15.5 atm.
  2. At malfunction of the valve pressure in a contour of low pressure has to reduce to zero. Check the reception and final parties of a receiver dehumidifier – they have to be identical temperature.

Pressure switch

 PERFORMANCE ORDER

  1. Start the engine and leave it to work for 1500 rpm.
  2. Establish the maximum turns of the fan of a heater and the minimum temperature.
  1. Separate pressure sensor socket.
  1. Connect the positive probe of an ohmmeter to contact 4, and negative – to contact of 1 socket and make sure of change of conductivity at change of pressure of coolant. Thus the control of the magnetic coupling is checked.
1 — the Contour of low pressure
2 — there is a conductivity
3 — there is no conductivity
4 — the Contour of high pressure
  1. Connect the positive probe of an ohmmeter to contact 2, and negative – to contact 3 sockets and make sure of change of conductivity at change of pressure of coolant. Thus the control of the condenser fan is checked.
1 — there is a conductivity
2 — there is no conductivity

Main relay of a heater

 PERFORMANCE ORDER

  1. Take the main relay of a heater of the assembly block (see the Head Onboard electric equipment).
  1. Certify available conductivity between contacts 1 and 2, and also 3 and 4. Give battery tension on contacts 1 and 2 and certify available conductivity between contacts 3 and 5. At unsatisfactory results of checks replace the relay.

Relay of the magnetic coupling

 PERFORMANCE ORDER

  1. Take the relay of the magnetic coupling from the assembly block in a motive compartment (see the Head Onboard electric equipment).
  1. Certify available conductivity between contacts 1 and 2. Give battery tension on contacts 1 and 2 and certify available conductivity between contacts 3 and 5. At unsatisfactory results of checks replace the relay.

Condenser fan

 PERFORMANCE ORDER

  1. Start the engine, establish the maximum speed of rotation of the fan of a heater, the minimum temperature and include К/В.
  2. Make sure that the fan of the condenser works at low speed at a temperature of OZh the 90th hail., and also with a pressure less than 15 atm. At a temperature of 95 a hail. and pressure over 15 atm – the fan has to work at high speed.
  1. Separate the electrical wiring socket the fan of the condenser and connect the rechargeable battery and the ampermeter to its contacts. Make sure that the krylchatka of the fan rotates smoothly. Indications of the ampermeter have to make 9.8 ± 1.5 A at a temperature of 20 a hail.

Checks of system through ECU contacts

The table of tension on contacts of the control unit of the K/V serviceable system under certain conditions is given below.

Contacts of the module of management To/in

Contacts

Color of wires

Check conditions

Tension, In

<—>IG GND <—>(C14-1 S14-11)

<—>R-L BR

Ignition is included

10 ÷ 14

IN <—>GND <—>(C14-3 C14-11)

<—>W-L BR

Constantly

10 ÷ 14

<—>BLW GND <—>(C14-4 C14-11)

<—>P-L BR

Ignition is included. The fan switch in the provision of "ON"

1 ÷ 3

THERE <—>SG-5 <—>(C14-7 C14-16)

<—>BR WR

External temperature 25th hail.

1.35 ÷ 1.75

External temperature 40th hail.

0.85 ÷ 1.25

<—>TR SG-3 <—>(C13-3 S13-9)

GR <—>of G-W

Temperature of salon 25 hail.

1.8 ÷ 2.2

Temperature of salon 40 hail.

1.2 ÷ 1.6

<—>TPI SG-2 <—>(C13-11 C13-1)

<—>GR B-W

The REC switch is pressed

3.5 ÷ 4.5

The FRS switch is pressed

0.5 ÷ 1.5

<—>AIR GND <—>(C13-12 C14-11)

<—>R BR

The FRS switch is pressed

10 ÷ 14

The REC switch is pressed

Lower than 1.0

<—>A I F GND <—>(C13-13 C14-11)

<—>BR-W BR

The FRS switch is pressed

Lower than 1.0

The REC switch is pressed

10 ÷ 14

<—>TS S5-3 <—>(C13-15 C13-16)

<—>Y-B L

The sensor is lit with an electric lamp

0.8 ÷ 4.3

The sensor is spread with rags

Lower than 0.8

THOSE <—>SG-1 <—>(C12-1 C12-9)

<—>G-Y B-Y

Evaporator 0 temperature hail.

2.0 ÷ 2.4

Evaporator 15 temperature hail.

1.4 ÷ 1.8

<—>TPO SG-1 <—>(C12-3 S12-9)

<—>LG-R B-Y

Ignition is included. The FACE mode is chosen

3.5 ÷ 4.5

Ignition is included. The forward DEF switch is pressed

0.5 ÷ 1.5

<—>AOD GND <—>(C12-4 C14-11)

<—>LG-B BR

Ignition is included. The FACE mode is chosen

Lower than 1.0

Ignition is included. The DEF mode is chosen

10 ÷ 14

<—>AOF GND <—>(C12-5 C14-11)

<—>W BR

Ignition is included. The FACE mode is chosen

10 ÷ 14

Ignition is included. The DEF mode is chosen

Lower than 1.0

<—>TP SG-1 <—>(C12-6 C12-9)

<—>O B-Y

Ignition is included. Temperature regulator in the provision of the maximum cooling

3.5 ÷ 4.5

Ignition is included. Temperature regulator in the provision of the maximum warming up

0.5 ÷ 1.5

AMH <—>GND <—>(C12-7 S14-11)

<—>Y-G BR

Ignition is included. Temperature regulator in the provision of the maximum warming up

10 ÷ 14

Ignition is included. Temperature regulator in the provision of the maximum cooling

Lower than 1.0

<—>AMC GND <—>(C12-8 S14-11)

<—>Y BR

Ignition is included. Temperature regulator in the provision of the maximum cooling

10 ÷ 14

Ignition is included. Temperature regulator in the provision of the maximum warming up

Lower than 1.0