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
+ Engine
+ 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
   Specifications
   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
+ Body
+ Onboard electric equipment




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

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

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 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.

The most convenient devices for diagnostics of control systems by the engine of modern models of cars are manual input readers of skanerny type (address to an accompanying illustration). Before application the input reader should be checked on compliance 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 regions of the world (Europe, Asia, the USA etc.).

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.

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

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 the V8 engine

1 — the pressure VSV sensor паров
2 — the pressure Sensor паров
3 — the Sensor switch of permission of start (AT)
4 — ECU of the fuel pump
5 — VSS
6 — DLC No. 3
7 — the Sensor switch of stoplights
8 — Warmed up a lambda probe (a row 1 the sensor 2 and the block 2 the sensor 2)
9 — the Main EFI relay
10 — Warmed up a lambda probe (a row 1 the sensor 1)
11 — the detonation No. 1 Sensor
12 — Warmed up a lambda probe (a row 2 the sensor 1)

13 — the detonation No. 2 Sensor
14 — the CKP Sensor
15 — the CMP Sensor
16 — the Sensor of temperature of cooling liquid
17 — a butterfly valve Drive with electromagnetic coupling
18 — the Sensor of provision of a pedal of an accelerator
19 — the MAF Sensor
20 — DLC No. 1
21 — TPS
22 — the ignition Coil
23 — ECM
24 — EVAP system VSV

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

Reading of codes of malfunctions of OBD-II is possible only with use of the special equipment. The complete list of codes revealed by system is provided in the text of this Section far not, – in case of need address for consultation in representation offices of the company manufacturer of the car.

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

Reading written down in memory of the processor of codes is made by means of the special OBD-II scanner which is connected to the 16-contact diagnostic DLC 3 socket (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 information on the current parameters of functioning of information sensors and actuation mechanisms. The scanner has rather high cost in view of what it will be reasonable to charge performance of procedure of diagnostics to specialists of car-care center.

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).

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


Battery shutdown also leads to removal of settings of the receiver on favourite radio stations.


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