Toyota Land Cruiser 100 / Amazon, Lexus LX 470
Since 1997 of release
Repair and car operation
Tojota Lend Kruzer, Amazon, Leksus LX470
+ Identification numbers of the car
+ Controls and receptions of safe operation of the car
+ Options and car routine maintenance
+ The engine
+ Systems of cooling of the engine, salon and air conditioning heating
+ The power supply system and release 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
Application of an oscillograph for supervision of working signals of a control system
Check of a condition and replacement ЕСМ
Information gauges - the general information and check of serviceability of functioning
Replacement of information gauges
System of catching of fuel evaporations (EVAP) - the general information, check of a condition and replacement of components
System of operated ventilation картера (PCV)
The Katalitichesky converter - the general information, check of a condition and replacement
+ Gear change box
+ Transmissionnaja line
+ Brake system
+ Suspension bracket and steering
+ Onboard electric equipment
Information gauges – the general information and check of serviceability of functioning
2-contact термисторы (gauges of temperature of the cooling liquid, soaked up air, etc.)
Термисторы represent the resistors changing resistance depending on temperature, and developing corresponding alarm pressure. To of this kind to elements gauges of temperature of a cooling liquid of the engine concern (EATS) also temperatures of soaked up air (IAT). It is necessary to notice that resistance of the given gauges changes in inverse proportion to temperature change, i.e., DECREASES with INCREASE of last, and on the contrary. For check термисторных gauges switch a multimeter to resistance measurement, disconnect from the gauge electroconducting and measure resistance between assemblage plugs. Take temperature. Then warm up the gauge to certain temperature and again measure its resistance. Compare the received results to the ordered. Gauge ECT site is shown on an illustration more low. Gauge IAT is built in gauge MAF. For gauge IAT resistance between plugs E2 and ТНА gauge MAF is measured.
Further it is necessary to check up correctness of the basic pressure which are given out on the gauge by the processor. Connect to the gauge electroconducting, switch a multimeter to measurement of pressure and connect it щупы to plugs of a plait of electroconducting on a socket. The rating value of basic pressure should make about 5.0 V.Proverka is made at the included ignition, the engine do not start. If infringement of serviceability of giving on the gauge of basic pressure takes place, it is necessary to check up a condition of connecting electroconducting and actually ЕСМ.
Potentiometers (the gauge of position throttle заслонки)
The potentiometer represents the resistor which resistance changes as a result of mechanical moving of some components. Gauge TPS develops the alarm pressure proportional to current size of resistance of a potentiometer, defined by position throttle заслонки in the throttle case. The signal from the gauge arrives on ЕСМ which on the basis of the analysis of the arriving data defines position and a movement direction заслонки. For check of serviceability of functioning of gauge TPS character of change of size of resistance of a potentiometer depending on degree of opening throttle заслонки is quantitatively estimated. The given contour is defined as VTA – E2.
2-contact electromagnetic gauges (gauges of position of cranked both distributive shaft and the gauge of speed of movement of the car)
In a basis of a design of electromagnetic gauges the constant magnet placed in a wire winding is put. Typical representatives of electromagnetic gauges are gauges of position of cranked and distributive shaft (СКР and СМР), and also the gauge of speed of movement of the car (VSS). The steel disk fixed on a gear wheel is equipped by the uvulas passing between the polar terminations of a magnet and causing short circuit of a magnetic field. Magnetic field fluctuations lead to change of alarm pressure of the gauge. On the basis of the analysis of signals ЕСМ arriving from gauges defines speed of movement of the car (VSS), or current position of a corresponding shaft (СКР and СМР). Gauge CKP develops for ECU signal G. An arrangement and schemes of check of gauges are shown on illustrations more low.
Gauges About 2, or ljambda-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 gauge, force last to develop alarm pressure. The amplitude of a signal, depending on concentration of oxygen can make from 0.1 In (the high maintenance About 2, the impoverished air-fuel mix) to 0.9 In (the low maintenance About 2, the enriched mix). ЕСМ continuously traces a signal arriving from a ljambda-probe, and on the basis of the arriving data makes corresponding updating of structure air-fuel, trying to support it on an optimum level (14.7 parts of air on 1 part of fuel, – стехиометрическое number). Updating of structure of a mix is made at the expense of management of duration of time of opening of injectors. The ljambda-probe starts to develop alarm pressure only after will be heated-up to the normal working temperature making approximately 320°С. In a kind told, in the course of engine ESM warming up works in a mode of the opened contour. Do not forget to check serviceability of a condition of all ljambda-probes a part of system.
The gauge of measurement of weight of an air stream
The gauge serves for measurement of the expense of a throttle of air soaked up in the case. ЕСМ uses the information arriving from the gauge for updating of duration of time of opening of injectors, – the more air it is soaked up in the engine (acceleration), the in большем quantity of fuel last requires. On considered models gauges of an air stream of vortical type with a sensitive element on the basis of a thread накаливания are used. The device allows to define the weight expense of a stream and has received the name of the gauge of weight of air (MAF). On the basis of information ЕСМ arriving from the gauge makes timely updating of structure of an air-fuel mix.
Detonation gauges elicit the fact of increase of intensity of vibrations of the engine arising at a detonation of an air-fuel mix, and give out the corresponding information allowing ЕСМ in due time to make suppressing detonation reduction of a corner of an advancing of ignition on the management module.
The gauge-switch of the permission of start (model with АТ)
The gauge-switch of the permission of start is established behind on a transmission dome, in its top part and serves for notice ЕСМ on the fact of finding АТ in positions «Р» and «N». The given information is used by the processor at management of functioning of system of stabilisation of turns of idling.
More detailed information by a principle of functioning of the gauge-switch of the permission of start is stated in the Head a gear change Box.
The gauge of pressure of steams of fuel
The gauge serves for tracing of pressure/depth of depression in a fuel tank. On the basis of information ЕСМ arriving from the gauge in due time elicits the fact of infringement of serviceability of a purge of a coal adsorber of system EVAP and brings in memory OBD-II a corresponding diagnostic code. On restoration of serviceability of functioning of system EVAP it is necessary to charge performance of works to experts of car-care centre.