Service Infiniti QX4 since 1996 of release
1. Introduction
2. The maintenance instruction
3. Routine maintenance
4. The engine
5. Cooling and heating systems
6. Power supply systems and managements
6.1. Specifications
6.2. System of the consecutive distributed injection (SFI)
6.3. Sbrasyvanie pressure in the power supply system of petrol engines
6.4. Check of a condition and replacement of fuel lines and them choke connections
6.5. Electronic control systems - the general information
6.6. A control system of engine VG33E. Diagnostics procedures
7. Start and charge systems
8. A transmissionnaja line
9. Brake system
10. A suspension bracket and a steering
11. A body
12. An electric equipment
 












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6.5. Electronic control systems - the general information


Cхема arrangements of blocks of management of various systems on cars Infiniti QX4

The typical electronic control system 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. Actually updating is carried out by means of any actuation mechanisms, that or a different way reacting on managements developed by the module command electric signals.

Let's consider the specific example allowing more clearly to imagine a principle of functioning of system: built in in release system the oxygen gauge 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 injection 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.


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6.4. Check of a condition and replacement of fuel lines and them choke connections
On the following page
6.6. A control system of engine VG33E. Diagnostics procedures