Toyota Land Cruiser 100/Amazon, Lexus LX 470
since 1997 of release
Repair and car operation
Toyota Land Cruiser, Amazon, LX470 Lexus
+ Identification numbers of the car
+ Governing bodies and receptions of safe operation of the car
+ Settings and routine maintenance of the car
+ Systems of cooling of the engine, salon and air conditioning heating
+ the Power supply system and production of the fulfilled gases
+ engine Electric equipment
- Control systems of the engine and decrease in toxicity of the fulfilled gases
System of onboard diagnostics (OBD) - a principle of functioning and codes of malfunctions
Oscillograph application for supervision of working signals of a control system
Check of a condition and ESM replacement
Information sensors - the general information and check of serviceability of functioning
Replacement of information sensors
System of catching of fuel evaporations (EVAP) - the general information, check of a condition and replacement of components
System of operated ventilation of a case (PCV)
The catalytic converter - the general information, check of a condition and replacement
+ gear shifting Box
+ Transmission line
+ Brake system
+ Suspension bracket and steering
+ Onboard electric equipment
Information sensors – the general information and check of serviceability of functioning
2-contact termistor (sensors of temperature of the cooling liquid, soaked-up air, etc.)
Termistora represent the resistors changing resistance depending on temperature, and developing the corresponding alarm tension. Sensors of temperature of cooling liquid of the engine belong to elements of this kind (eats) also temperatures of soaked-up air (IAT). It should be noted that resistance of these sensors changes in inverse proportion to temperature change, i.e., DECREASES with INCREASE of the last, and on the contrary. For check of termistorny sensors switch a multimeter to resistance measurement, disconnect from the sensor electroconducting and measure resistance between assembly plugs. Take temperature. Then warm up the sensor to a certain temperature and again measure its resistance. Compare the received results to the ordered. Location of the ECT sensor is shown on an illustration below. The IAT sensor is built in the MAF sensor. For the IAT sensor resistance between E2 plugs and MAF sensor TNA is measured.
Further it is necessary to check correctness of the basic tension which is given out on the sensor by the processor. Connect to the sensor electroconducting, switch a multimeter to measurement of tension and connect it щупы to plugs of a plait of electroconducting on the socket. The nominal rate of basic tension should make about 5.0 V.Proverka is made at the included ignition, the engine do not start. If violation of serviceability of giving on the sensor of basic tension takes place, it is necessary to check a condition of connecting electroconducting and actually ESM.
Potentiometers (sensor of provision of a butterfly valve)
The potentiometer represents the resistor which resistance changes as a result of mechanical moving of some components. The TPS sensor develops the alarm tension proportional to the current size of resistance of a potentiometer, a butterfly valve defined by situation in the throttle case. The signal from the sensor arrives on ESM which on the basis of the analysis of arriving data defines situation and the direction of movement of a zaslonka. For check of serviceability of functioning of the TPS sensor nature of change of size of resistance of a potentiometer depending on extent of opening of a butterfly valve is quantitatively estimated. This contour is defined as VTA – by E2.
2-contact electromagnetic sensors (sensors of provision of cranked and distributive shaft and sensor of speed of movement of the car)
In a basis of a design of electromagnetic sensors the constant magnet placed in a wire winding is put. Typical representatives of electromagnetic sensors are sensors of provision of cranked and distributive shaft (SKR and SMR), and also the sensor of speed of movement of the car (VSS). The steel disk fixed on a gear wheel is equipped with the uvulas passing between the polar terminations of a magnet and causing short circuit of a magnetic field. Fluctuations of a magnetic field lead to change of alarm tension of the sensor. On the basis of the analysis of signals of ESM arriving from sensors defines speed of movement of the car (VSS), or the current provision of the corresponding shaft (SKR and SMR). The CKP sensor develops G signal for ECU. An arrangement and schemes of check of sensors are shown on illustrations below.
Sensors O 2, or lambda probes trace percentage of oxygen in the fulfilled gases of the engine. Present at system of release of a molecule About 2, entering reaction with a sensitive element of the sensor, force the last to develop alarm tension. The amplitude of a signal, depending on concentration of oxygen can make from 0.1 In (the high contents About 2, the grown poor air and fuel mix) to 0.9 In (the low contents About 2, the enriched mix). ESM continuously traces a signal arriving from a lambda probe, and on the basis of arriving data makes the corresponding correction of structure air and fuel, trying to support it at an optimum level (14.7 parts of air on 1 part of fuel, – stekhiometrichesky number). Correction of structure of a mix is made at the expense of management of duration of time of opening of injectors. The lambda probe starts to develop alarm tension only after will be heated-up to normal working temperature, a component approximately 320°С. In a look told, in the course of warming up of the ESM engine works in a mode of the opened contour. Do not forget to check serviceability of a condition of all a part of system a lambda probes.
Sensor of measurement of weight of an air stream
The sensor serves for measurement of an expense of a throttle of air soaked up in the case. ESM uses information arriving from the sensor for correction of duration of time of opening of injectors, – the more air (acceleration) is soaked up in the engine, the last needs bigger amount of fuel. On considered models sensors of an air stream of vortical type with a sensitive element on the basis of an incandescence thread are used. The device allows to define a weight expense of a stream and received the name of the sensor of weight of air (MAF). On the basis of information of ESM arriving from the sensor makes timely correction of structure of an air and fuel mix.
Sensors of a detonation elicit the fact of increase of intensity of vibrations of the engine arising at a detonation of an air and fuel mix, and give out the relevant information allowing ESM in due time to make reduction suppressing a detonation of a corner of an advancing of ignition on the management module.
The sensor switch of permission of start (model with AT)
The sensor switch of permission of start is established behind on a transmission dome, in its top part and serves for the notice of ESM on the fact of finding of AT in the provisions "R" and "N". This information is used by the processor at management of functioning of system of stabilization of turns of idling.
More detailed information on a principle of functioning of the sensor switch of permission of start is stated in Head a gear shifting Box.
Pressure sensor паров fuels
The sensor serves for tracking of pressure/depth of depression in a fuel tank. On the basis of information of ESM arriving from the sensor in due time elicits the fact of violation of serviceability of a purge of a coal adsorber of EVAP system and brings in memory of OBD-II the corresponding diagnostic code. On restoration of serviceability of functioning of EVAP system it is necessary to charge works to specialists of car-care center.