LEXUS RX 300

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
   + System of cooling of the engine
   - Systems of heating, ventilation and air conditioning
      The general information
      Replacement, dismantling and block K/V assemblage
      Removal, dismantling, assemblage and installation of the block of the fan of a heater
      Check and replacement of the compressor and magnetic муфты К/В
      Removal and condenser K/V installation
      Checks of components of systems of heating and К/В
      Removal and installation of the block of management
+ 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
+ Basic schemes of electric connections



Checks of components of systems of heating and К/В

The broad valve

 PERFORMANCE ORDER

  1. Start the engine and allow to it to work on 1500 rpm in a current not less than 5 minutes then make sure, that in a high pressure contour pressure 13.6 ÷ 15.5 атм was established.
  2. At malfunction of the valve pressure in a contour of low pressure should fall to zero. Check up the reception and final parties of a receiver-dehumidifier – they should be identical temperature.

The pressure switch

 PERFORMANCE ORDER

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

The main relay of a heater

 PERFORMANCE ORDER

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

The relay magnetic муфты

 PERFORMANCE ORDER

  1. Take the relay magnetic муфты from the assembly block in an impellent compartment (the Onboard electric equipment see the Head).
  1. Certify available conductivity between contacts 1 and 2. Submit pressure of the battery on contacts 1 and 2 and certify available conductivity between contacts 3 and 5. At unsatisfactory results of checks replace the relay.

The 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 condenser fan works on low speed at temperature ОЖ 90 hailstones., and also at pressure less than 15 атм. At temperature 95 hailstones. And pressure above 15 атм – the fan should work on high speed.
  1. Separate a socket of electroconducting the fan of the condenser and connect to its contacts the storage battery and the ampermeter. Make sure, that крыльчатка the fan rotates smoothly. Ampermeter indications should make 9.8 ± 1.5 And at temperature 20 hailstones.

System checks through contacts ECU

The table of pressure on contacts of the block of management by serviceable system K/V under certain conditions is more low resulted.

Contacts of the module of management К/В

Contacts

Colour of wires

Check conditions

Pressure, In

IG <—>GND (C14-1 <—>С14-11)

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 position "ON"

1 ÷ 3

THERE <—>SG-5 (C14-7 <—>C14-16)

BR <—>WR

External temperature 25 hailstones.

1.35 ÷ 1.75

External temperature 40 hailstones.

0.85 ÷ 1.25

TR <—>SG-3 (C13-3 <—>С13-9)

G-R <—>G-W

Temperature of salon 25 hailstones.

1.8 ÷ 2.2

Temperature of salon 40 hailstones.

1.2 ÷ 1.6

TPI <—>SG-2 (C13-11 <—>C13-1)

GR <—>B-W

Switch REC is pressed

3.5 ÷ 4.5

Switch FRS is pressed

0.5 ÷ 1.5

AIR <—>GND (C13-12 <—>C14-11)

R <—>BR

Switch FRS is pressed

10 ÷ 14

Switch REC is pressed

More low 1.0

A I F <—>GND (C13-13 <—>C14-11)

BR-W <—>BR

Switch FRS is pressed

More low 1.0

Switch REC is pressed

10 ÷ 14

TS <—>S5-3 (C13-15 <—>C13-16)

Y-B <—>L

The gauge is shined with an electric lamp

0.8 ÷ 4.3

The gauge is covered by rags

More low 0.8

THOSE <—>SG-1 (C12-1 <—>C12-9)

G-Y <—>B-Y

Temperature of the evaporator 0 hailstones.

2.0 ÷ 2.4

Temperature of the evaporator 15 hailstones.

1.4 ÷ 1.8

TPO <—>SG-1 (С12-3 <—>С12-9)

LG-R <—>B-Y

Ignition is included. The mode "FACE" is chosen

3.5 ÷ 4.5

Ignition is included. Forward switch "DEF" is pressed

0.5 ÷ 1.5

AOD <—>GND (C12-4 <—>C14-11)

LG-B <—>BR

Ignition is included. The mode "FACE" is chosen

More low 1.0

Ignition is included. The mode "DEF" is chosen

10 ÷ 14

AOF <—>GND (C12-5 <—>C14-11)

W <—>BR

Ignition is included. The mode "FACE" is chosen

10 ÷ 14

Ignition is included. The mode "DEF" is chosen

More low 1.0

TP <—>SG-1 (C12-6 <—>C12-9)

O <—>B-Y

Ignition is included. A temperature regulator in position of the maximum cooling

3.5 ÷ 4.5

Ignition is included. A temperature regulator in position of the maximum warming up

0.5 ÷ 1.5

АМН <—>GND (C12-7 <—>С14-11)

Y-G <—>BR

Ignition is included. A temperature regulator in position of the maximum warming up

10 ÷ 14

Ignition is included. A temperature regulator in position of the maximum cooling

More low 1.0

AMC <—>GND (C12-8 <—>С14-11)

Y <—>BR

Ignition is included. A temperature regulator in position of the maximum cooling

10 ÷ 14

Ignition is included. A temperature regulator in position of the maximum warming up

More low 1.0