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
System of onboard diagnostics (OBD) – a principle of functioning and codes of malfunctions
Data on diagnostic devices
Use of a digital measuring instrument preferably for several reasons. First, on analog devices it is rather difficult (sometimes, it is impossible), to define result of the indication to within the 100-th and thousand shares while at inspection of the contours including in the structure electronic components, such accuracy takes on special significance. The second, the reason that fact is not less important that the internal contour of a digital multimeter, has rather high impedance (internal resistance of the device makes 10 million Ohm). As the voltmeter is connected to a checked chain in parallel, accuracy of measurement by that is higher, than the smaller parasitic current will pass through actually device. This factor is not essential at measurement of rather high values of tension (9-12 In), however there is defining at diagnostics of elements giving out low-voltage signals, such, as, for example, a lambda probe where it is a question of measurement of shares of volt.
With introduction in production meeting the requirements of the last legislations on environmental protection of system of onboard diagnostics of the second generation (OBD-II) input readers of a special design started to be issued. Some producers adjusted release of the scanners intended for use by amateur mechanics in house conditions, – ask in shops of automobile accessories.
Electronic systems of injection and decrease in toxicity of the fulfilled gases in the course of the functioning at operation of the car are crossed with the various other systems which are responsible for efficiency of return of the engine. All listed systems include a set of information sensors and the electronic module of management (ESM) (address to an illustration above) in the structure.
This sort of systems can be compared on the structure to the central nervous system of a human body where the role of a brain plays the module of management (ESM), and as the nervous terminations information sensors act. Sensors send signals on ESM which analyzes arriving information and develops reciprocal commands for adjustment of the corresponding working parameters.
Let's consider the specific example allowing more clearly to imagine a principle of functioning of system: built in in release system the lambda probe continuously traces contents level About 2 in a stream of the fulfilled gases of the engine. If percentage of oxygen considerably deviates some entered into memory of system of control value, ESM immediately receives the relevant information and on the basis of its analysis develops command for the corresponding correction of duration of opening of injectors of fuel, carrying out thereby adjustment of structure of an air and fuel mix. Duration of the described procedural cycle makes fractions of a second that provides due efficiency of functioning of system. As a result, efficiency of return of the engine is constantly supported at the greatest possible level.
Reading of codes of malfunctions of OBD-II
In OBD-II system five-place codes of the revealed malfunctions are brought in memory of the processor (ESM).
It is necessary to notice that the system of onboard self-diagnostics is capable to find not all possible refusals, – in case of need do not hesitate to address for consultations on firm car repair shops of the Toyota company. During search of the reasons of decrease in efficiency of return of the engine, increase of fuel consumption or level of toxicity of the fulfilled gases (these violations usually are not accompanied by operation of a control lamp «Check the engine») it is necessary to make first of all all complex of standard checks about identification of the reasons listed in the Section, devoted to diagnostics of malfunctions of systems and car knots in introduction to the real Management and after it to be switched to OBD system.
It is necessary to remember that use of OBD-II demands from the operator of basic knowledge in the field of automobile electronics, non-compliance with precautionary measures at the address of ESM and other electronic components can lead to an irreversible exit of system out of operation.
In the table provided below the list of the diagnostic OBD-II codes of the most typical refusals of system is presented. If to reveal and eliminate a cause of failure independently it is not possible, the car should be driven away on car repair shop for the purpose of carrying out diagnostics with use of the special diagnostic equipment.
Cleaning of memory of OBD-II
For cleaning of memory of ESM connect to system the scanner and in an apportion of its menu choose the CLEARING CODES function («Removal of codes»). Further follow the instructions highlighted on the device, or at once for 30 seconds take from the nest in the assembly block EFI safety lock. Alternatively cleaning of memory of system can be made by a way of removal of a fusible insert (the main safety lock of system of onboard power supply), the battery established near the positive plug (see. Onboard electric equipment) (it is possible to disconnect also simply from the battery a positive wire).