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
- Power supply system and production of the fulfilled gases
   - Power supply system
      General information and security measures
      Sbrasyvaniye of pressure in fuel system
      Principle of functioning of a control system of fuel injection
      Checks of system of injection
      Removal and installation of the fuel pump, sensor of a stock of fuel and regulator of pressure of fuel
      Removal and installation of fuel distributive highways and injectors
      Removal and installation of a fuel tank and fuel lines
      Removal and air purifier installation
      Removal, installation and adjustment of the case of a throttle and TPS sensor
      Removal and installation of components of ACIS system
   + Systems of release and decrease in toxicity 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



Checks of system of injection

General checks

 PERFORMANCE ORDER

  1. Check a condition of the storage battery (see. Heads of Control and routine maintenance of the car and System of electric equipment of the engine) and a condition of all safety locks (see. Head Onboard electric equipment).
  2. Separate and again join all sockets of the relevant electronic systems. Check reliability of fixing of sockets and cables in an impellent compartment.
  3. Check reliability of fastening of all connections of weight.
  4. Check tightness of hoses and pipelines, and also their connections, special attention giving to identification of cracks. Replace defective components, tighten weakened shtutserny sockets.

Check of injectors

Violation of tightness of valves of fuel injectors is interfaced to difficulties at start of the hot engine. Damage of injectors can be at the bottom of detonation emergence when the engine continues to work at the switched-off ignition.


 PERFORMANCE ORDER

  1. Start the engine on single turns.
  2. By means of a stethoscope make sure of serviceability of functioning of each separate injector, - existence of clicks indicates serviceability of opening and closing of valves.

In the absence of near at hand stethoscope check can be made to the touch - a finger or by means of a screw-driver.

  1. At identification of unusual sounds, no less than at total absence of those it is necessary to make sure of serviceability of giving on supply voltage injectors, to measure electric resistance of injectors and integrity of their sealing rings.
  1. Check volume of injection of fuel each injector. For this purpose remove an injector (see. The section Removal and installation of fuel distributive highways and injectors), connect it to a toplivopodayushchy tube and lower in measured capacity. Submit tension on contacts of the socket of the fuel pump, and then for 15 seconds on injector contacts. Measure amount of the fuel injected by an injector. Carry out such check 2-3 times for each injector and compare the received results to requirements of Specifications of Head of the Power supply system and production of the fulfilled gases. If necessary replace an injector.
  1. Disconnect electroconducting from an injector and check it on leaks – in 12 minutes from it should flow out no more than one drop of gasoline.

Check of the fuel pump

 PERFORMANCE ORDER

  1. For check of serviceability of functioning of the fuel pump separate the socket of its electroconducting and submit on it tension of the battery. Thus there should be a pressure in a toplivopodayushchy tube (from the fuel pump), and also the sound of the current gasoline should be heard. Otherwise check AM2 safety locks (30 And) and IGN (5 And), the main EFI relay, the fuel pump and power supply system electroconducting.
  2. Disconnect a negative wire from the storage battery, establish between a manometer in connection of a toplivopodayushchy tube and connect a negative wire to the battery. Submit tension on contacts of the socket of the fuel pump, take readings of a manometer and compare them to requirements of Specifications of Head of the Power supply system and production of the fulfilled gases. If pressure is overestimated, replace a regulator of pressure of fuel; if pressure is underestimated, check a condition of fuel hoses and their connections, the fuel filter and a regulator of pressure of fuel.
  3. Carry out the previous check at the engine started on single turns. Pressure should not change. Muffle the engine and make sure that in fuel system within 5 minutes after switching off of the engine pressure not less than 1.45 atm keeps. Otherwise check the fuel pump, a regulator of pressure of fuel and injectors.
  4. Having separated the socket of the fuel pump, measure resistance between its contacts 4 and 5 and compare result to requirements of Specifications of Head of the Power supply system and production of the fulfilled gases. If necessary replace the fuel pump.

MAF sensor check

 PERFORMANCE ORDER

  1. Separate the MAF sensor socket, measure resistance between E2 and THA sensor contacts at different temperatures and compare the received results to requirements of Specifications of Head of the Power supply system and production of the fulfilled gases. If necessary replace the MAF sensor.
  1. Join the socket, include ignition and connect the voltmeter to VG contacts (+) and E2G (-) the socket. Make sure of change of indications of the voltmeter at change of an air stream via the sensor. Otherwise replace the sensor.

Check of the case of a throttle and TPS sensor

Make described below check after removal of the case of a throttle or the IAC valve.


 PERFORMANCE ORDER

  1. Without removing the throttle case from the car make sure of smoothness of a course of a drive of a throttle.
  2. Make sure of lack of gaps between each top screw of a throttle and the throttle lever at creation of depression of 0.53 atm in the mechanism of opening of a butterfly valve. At the same time between each adjusting screw and the lever of a throttle there should be a gap according to requirements of Specifications of Head of the Power supply system and production of the fulfilled gases.
Check of gaps in a butterfly valve drive.
1 — the Top screws
2 — the Adjusting screw on the party of closing of a zaslonka
3 — the Adjusting screw on the party of opening of a zaslonka
  1. Completely open a butterfly valve and measure a gap a boundary by the adjusting screw on the party of closing and the throttle lever. Compare results of measurements by requirements of Specifications of Head of the Power supply system and production of the fulfilled gases and if necessary adjust a butterfly valve drive (see. Section Removal, installation and adjustment of the case of a throttle and TPS sensor).
  1. Separate the TPS sensor socket, measure resistance between contacts of the sensor and compare the received results to requirements of Specifications of Head of the Power supply system and production of the fulfilled gases.

IAC valve check

The IAC valve fastens to the throttle case from below four screws; at removal of the valve replace its laying.

Components of assembly of the case of a throttle 

1 — Section No. of 3 cases of a throttle
2 — the Protective plate
3 — the Sealing ring
4 — the TPS Sensor

5 — Section No. of 1 case of a throttle
6 — Laying
7 — Section No. of 2 cases of a throttle
8 — the IAC Valve


 PERFORMANCE ORDER

  1. Warm up the engine to working temperature, check turns of idling (X/x), establish transmission in neutral situation and switch off К/В.
  1. To Peremknita contacts of E1 and DLC No. 1 socket Tc. Make sure that after deduction of speed of rotation of a cranked shaft of the engine about 1000 rpm within 5 seconds are again established turns X/x. If necessary check the IAC valve, electroconducting and ECM. Remove a crossing point from the DLC No. 1 socket.
  1. Separate the socket of the IAC valve and measure resistance between its contact of +B and other contacts. Compare results of measurements to requirements of Specifications of Head of the Power supply system and production of the fulfilled gases and if necessary replace the IAC valve.
  1. Execute checks and muffle the engine.
  2. Disconnect a hose of a podmeshivaniye of air from an air tube and block an exit of the IAC valve and an entrance in a tube. Start the engine and make sure that it works for 500 rpm either less, or in general глохнет. Otherwise check on leakages of connection of hoses of a podmeshivaniye of air, a tube and injectors.
  1. Make sure that the butterfly valve is open half, join the socket of electroconducting of the IAC valve and include ignition. Make sure that the valve for 0.5 seconds moves as it should be from the provision of completely closed zaslonka to the provision of completely open zaslonka, and then to situation half an open zaslonka. At negative results of check replace the IAC valve.

VVT-i valve check

VVT-i valves fasten to heads of cylinders bolts (see an illustration Components of installation of final collectors, sensors and electroconducting) with effort of 8 Nanometers; at removal of the valve replace its sealing ring.


 PERFORMANCE ORDER

  1. Separate the socket of the valve and measure resistance between valve contacts. Compare the received result with requirements of Specifications of Head of the Power supply system and production of the fulfilled gases and if necessary replace the valve.
  1. Connect a wire +12 In to contact of 1 valve, and a weight wire – to contact 2. Thus the valve should move in the direction specified by a continuous arrow. At tension removal the valve should move in the provision of a dotted arrow.

Check of components of ACIS system

Components of the VSV installation of ACIS and EVAP systems

1 — EVAP Hose
2 — EVAP system VSV
3 — the EVAP system VSV Socket
4 — ACIS system VSV No. 2

5 — the ACIS system VSV No. 2 Socket
6 — the ACIS system VSV No. 1 Socket
7 — the Vacuum hose
8 — ACIS system VSV No. 1


 PERFORMANCE ORDER

  1. Check the ACIS system valve. For this purpose by means of a splitter establish the vacuum gage on a vacuum hose of the activator of ACIS system and start the engine on single turns – the arrow of a manometer should not move. At sharp squeezing of a pedal of gas in a vacuum hose there should be a depression of 0.26 atm (the rod of the activator should be extended). The valve should be extended and at compulsory creation of the specified depression in a vacuum hose and should not after that to come back to a starting position within not less than a minute.
  1. Check the vacuum tank located under a support of the battery: air should pass from the union B in the union A, but not on the contrary. After this check stop up the union B with a finger and create in the union A depression of 0.26 atm – it should not fall within not less than a minute.
  1. Remove assembly of valves, disconnect from checked VSV two hoses, turn out the screw and remove VSV.
  2. Check VSV on a gap in a chain, having measured resistance between VSV socket contacts (between them there should be a conductivity). Compare the received result to requirements of Specifications of Head of the Power supply system and production of the fulfilled gases. Then make sure of lack of conductivity between each of contacts of VSV and its case. If necessary replace VSV.
  1. Make sure of that air passes from the union E to the filter. Then submit tension of the battery on contacts of VSV and make sure that air passes from the union E to the union F. If necessary replace VSV

Check of the relay of a power supply system

 PERFORMANCE ORDER

  1. Take the checked relay (the main EFI relay, the relay of heating of the A/F sensor or the relay of a rupture of a chain) from the corresponding assembly block (see. Head Onboard electric equipment).
  1. By means of an ohmmeter make sure available conductivity between contacts of 1 and 2 relays, and also of lack of conductivity between contacts 3 and 5. Put tension of the battery to contacts 1 (+) and 2 (-) and make sure available conductivity between contacts of 3 and 5 relays. If checks yielded unsatisfactory results, replace faulty relays.

Check of VSV of EVAP system

 PERFORMANCE ORDER

  1. Execute checks.
  1. Make sure of that air hardly passes from the union E to the union F. Then submit tension of the battery on contacts of VSV and make sure that air passes from the union E to the union F. If necessary replace VSV.

Check of the VSV valve of the closed tank (CCV)

Components of the VSV installation of the valve CCV

1 — the MAF sensor Socket
2 — the VSV valve CCV
3 — the Vacuum hose

4 — the Sealing ring
5 — the valve CCV VSV Socket
6 — an air purifier Cover


 PERFORMANCE ORDER

  1. Separate sockets of electroconducting of the MAF and VSV sensor of the valve CCV, and also its vacuum hose.
  2. Turn out two screws and remove the VSV valve CCV with a sealing ring.
  3. Measure resistance between contacts of the VSV socket and compare it to requirements of Specifications of Head of the Power supply system and production of the fulfilled gases, make sure of lack of conductivity between contacts of VSV and its case. If necessary replace VSV.
  4. Make sure of that air passes from the union A to the union B, then submit tension of the battery on contacts of VSV and make sure that air does not pass from the union A to the union B. If necessary replace VSV.

Check of the VSV valve of a purge of an adsorber

Components of the VSV installation of the valve of a purge of an adsorber

1 — Assembly of a coal adsorber
2 — the VSV Socket of the valve of a purge of an adsorber

3 — the VSV valve of a purge of an adsorber
4 — Protection of a coal adsorber


 PERFORMANCE ORDER

  1. Separate the socket and two hoses and remove VSV from a coal adsorber.
  2. Inspect.
  1. Make sure of that air does not pass from the union E to the union F, then submit tension of the battery on contacts of VSV and make sure that air passes from the union E to A.Pri neobkhodimosti's union replace VSV.

ECT sensor check

 PERFORMANCE ORDER

  1. Empty cooling system (see. The section Replacement of cooling liquid (OZh)), separate the socket of the ECT sensor of a control system of the engine and turn out the sensor a deep face key.
  1. Measure resistance between contacts of the sensor and compare results to the reference chart. If necessary replace the sensor together with its laying.

Check of the sensor of pressure of fuel evaporations

Location of the sensor of fuel evaporations

1 — Section No. of 3 protection of a fuel tank
2 — the Sensor of fuel evaporations
3 — the Socket of the sensor of fuel evaporations
4 — the Clamp

5 — the Adjusting plate of a ventilating tube
6 — the Basic plate of a tube of EVAP
7 — Laying


 PERFORMANCE ORDER

  1. Remove assembly of a fuel tank, section No. its 3 protection and remove the sensor of fuel evaporations.
  2. Include ignition and measure tension between extreme contacts (VC and E2) the socket on electroconducting of the sensor of fuel evaporations – it should make 4.5÷5.5 Century.
  1. Join the socket of electroconducting of the sensor of fuel evaporations, connect the voltmeter to E2 contacts (-) and PTNK (+) and include ignition. Compare voltmeter indications at various values of pressure in the sensor to requirements of Specifications of Head of the Power supply system and production of the fulfilled gases.
  1. If listed above check yielded unsatisfactory results, replace the sensor.

Check of sensors of a detonation

 PERFORMANCE ORDER

  1. Separate the socket of the sensor of a detonation (see an illustration the Components interfaced to the block of cylinders) and make sure of lack of conductivity between its contact and the case. If conductivity takes place, replace the sensor (and).

Check of A/F sensors and lambda probe 2 numbers of cylinders 1

 PERFORMANCE ORDER

  1. Check resistance of heating of sensors of quality of an air and fuel mix. For this purpose connect an ohmmeter to +B and HT contacts and compare its indications to requirements of Specifications of Head of the Power supply system and production of the fulfilled gases. If necessary replace the sensor (and).
  1. Remove a driver's seat and a floor covering (see. A body) then separate the electroconducting socket a lambda probe 2 numbers of cylinders 1 and measure resistance between +B and HT contacts. Compare result of measurement to requirements of Specifications of Head of the Power supply system and production of the fulfilled gases and if necessary replace a lambda probe.