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
+ Body
+ Onboard electric equipment

System of onboard diagnostics (OBD) – ринцип functioning and codes of malfunctions

All considered models are completed with systems OBD II (the second generation), for data read-out from which memory the special scanner is required. In view of told above, reading of codes of malfunctions from memory of system OBD II it is necessary to charge to the experts of a firm car repair shop having all necessary diagnostic equipment. On all equipped OBD II models five-place diagnostic codes a part from which it is resulted in the text of the present Section are used, more detailed information can be received in representation branches of company Toyota.

Data on diagnostic devices

Check of serviceability of functioning of components of systems of injection and decrease in toxicity of the fulfilled gases is made by means of a universal digital measuring instrument (multimeter) (address to an accompanying illustration).

Use of a digital measuring instrument preferably for the several reasons. First, on analogue devices it is difficult enough (at times, 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 high enough 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 above, than the smaller parasitic current will pass through actually device. The given factor is not essential at measurement concerning high values of pressure (9 – 12), however there is defining at diagnostics of elements giving out low-voltage signals, such, as, for example, a ljambda-probe where it is a question of measurement of shares of volt.

The most convenient devices for diagnostics of control systems by the engine of modern models of cars are manual input readers сканерного type (address to an accompanying illustration). Before application the input reader should be checked up on conformity of model and year of release of the checked car. Some scanners are multipurpose, at the expense of possibility of change of a cartridge depending on model of the diagnosed car (Ford, GM, Chrysler, etc.), others are adhered to requirements of the regional authorities and intended for use in certain areas of the world (Europe, Asia, the USA etc.).

With introduction in manufacture meeting the requirements of last legislations on preservation of the environment of system of onboard diagnostics of the second generation (OBD-II) input readers of a special design have started to be issued. Some manufacturers have adjusted release of the scanners intended for use by mechanics-fans in house conditions, – ask in shops of automobile accessories.

In spite of the fact that reading of codes of malfunctions in systems OBD II is not obviously possible without use of the special scanner, more low, in Section Information gauges - the general information and check of serviceability of functioning the description of some elementary checks of separate components of system is resulted.

The general information

The scheme of an arrangement of components of control systems of the engine and decrease in toxicity of the fulfilled gases on models with engine V8

1 — VSV the gauge of pressure of steams
2 — the Gauge of pressure of steams
3 — the Gauge-switch of the permission of start (АТ)
4 — ECU the fuel pump
5 — VSS
6 — DLC №3
7 — the Gauge-switch of stoplights
8 — the Warmed up ljambda-probe (a number 1 gauge 2 and the block 2 gauge 2)
9 — the Main relay EFI
10 — the Warmed up ljambda-probe (a number 1 gauge 1)
11 — the Gauge of a detonation №1
12 — the Warmed up ljambda-probe (a number 2 gauge 1)

13 — the Gauge of a detonation №2
14 — Gauge CKP
15 — Gauge CMP
16 — the Gauge of temperature of a cooling liquid
17 — the Drive throttle заслонки with electromagnetic coupling
18 — the Gauge of position of a pedal of an accelerator
19 — Gauge MAF
20 — DLC №1
21 — TPS
22 — the ignition Coil
23 — ECM
24 — VSV systems EVAP

Electronic systems of injection and decrease in toxicity of the fulfilled gases in the course of the functioning at car operation are crossed with the various other systems which are responsible for efficiency of return of the engine. All listed systems include in the structure a set of information gauges and the electronic module of management (ЕСМ) (address to an illustration above).

This sort of systems can be compared on the structure to the central nervous system of a human body where the brain role plays the management module (ЕСМ), and as the nervous terminations information gauges act. Gauges send signals on ЕСМ which analyzes the arriving information and develops reciprocal commands on updating of corresponding working parametres.

Let's consider the specific example allowing more clearly to imagine a principle of functioning of system: built in in system of release the ljambda-probe continuously traces maintenance 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, ЕСМ immediately receives the corresponding information and on the basis of its analysis develops a command on corresponding updating of duration of opening of injectors of fuel, carrying out thereby adjustment of structure of an air-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 OBD-II

Reading of codes of malfunctions OBD-II is possible only with use of the special equipment. In the text of the given Section the full list of codes revealed by system is resulted far not, – in case of need address for consultation in representation branches of the company-manufacturer of the car.

In system OBD-II five-place codes of the revealed malfunctions are brought in memory of the processor (ЕСМ).

Reading written down in memory of the processor of codes is made by means of special scanner OBD-II which is connected to 16-contact diagnostic socket DLC 3 (address to an accompanying illustration). The scanner is the laptop equipped with the interface for connection to system to onboard self-diagnostics, and is extremely effective tool, allowing not only to make reading of codes, but also to receive the information on current parametres of functioning of information gauges and actuation mechanisms. The scanner has high enough cost in view of what it will be reasonable to charge performance of procedure of diagnostics to experts of car-care centre.

It is necessary to notice that the system of onboard self-diagnostics is capable to find out not all possible refusals, – in case of need do not hesitate to address for consultations on firm car repair shops of company Toyota. During search of the reasons of decrease in efficiency of return of the engine, increase of the expense of fuel or level of toxicity of the fulfilled gases (the given infringements usually are not accompanied by operation of a control lamp «Check up the engine») it is necessary to make first of all all complex of standard checks about revealing of the reasons listed in Section, devoted to diagnostics of malfunctions of systems and car knots in introduction to the present Management and only after that to be switched to system OBD.

It is necessary to remember that use OBD-II demands from the operator of base knowledge in the field of automobile electronics, non-observance of safety measures at reference ЕСМ and other electronic components can lead to an irreversible exit of system out of operation.

In the table resulted more low the list of diagnostic codes OBD-II of the most typical refusals of system is presented. If to reveal and eliminate a cause of a failure independently it is not possible, the car should be driven away on a car repair shop for the purpose of carrying out of diagnostics with application of the special diagnostic equipment.

Clearing of memory OBD-II

For clearing of memory ЕСМ connect to system the scanner and in an apportion of its menu choose function «CLEARING CODES» («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 safety lock EFI. Alternatively clearing of memory of system can be made by removal of a fusible insert (the main safety lock of system of onboard power supplies), the battery established near to the positive plug (the Onboard electric equipment see) (it is possible to disconnect simply also from the battery a positive wire).

If the stereosystem established on the car is equipped by a security code before to disconnect the battery make sure that have a correct combination for audiosystem input in action!

Battery switching-off also leads to removal of options of the receiver on favourite radio stations.

In order to avoid damage ЕСМ its switching-off and connection should be made only at the switched off ignition!