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The engine management system
Location of the engine management system SIMOS in the engine compartment with the engine 1,6-I
1 - Hall sensor electrical connector (black);
2 - Hall sensor. At the top casing of a gear belt;
3 - Lambda probe, 50 Nm. Mounting position with automatic transmission in the exhaust manifold;
4 - the electric connector Lambda sensor. On the bottom side of the vehicle to the right;
5 - switching valve intake manifold;
6 - a control unit SIMOS;
7 - the throttle body;
8 - coolant temperature sensor;
9 - air flow meter. With the temperature sensor in the engine air inlet; | 10 - earthing point of attachment to the gearbox;
11 - the ignition coil. With the ignition control unit;
12 - the knock sensor electrical connector;
13 - engine speed sensor;
14 - electrical connector engine speed sensor (gray);
15 - the gauge of detonation;
16 - the fuel injectors;
17 - the fuel pressure regulator;
18 - canister with charcoal;
19 - solenoid valve with charcoal canisters |
On vehicles with petrol engines are installed various engine management system.
Engine | The engine management system | The engine 1,4-I | AHW / AKQ Magneti Marelli 4AV | Engine 1,6-I | AEH / AKL Simos 2 | The engine 1,8-I | AGN Motronic 3.8.5 | The engine 1,8-I | Turbo AGU Motronic 3.8.3 | Engine 2,3-I | AGZ Motronic 3.8.3 |
The use of electronic engine management system has the following advantages:
- Ensures optimum supply of fuel to the engine at all operating conditions, thereby reducing the fuel consumption while maintaining dynamic characteristics of a vehicle;
- Due to the more complete combustion of the fuel and the use of the catalyst decreases harmful emissions with the exhaust gases;
- As the electronic engine management system detects and stores faults, significantly accelerating the search and detection of faults;
- Engine management on all operational modes sets the optimum ignition timing, the time and the amount of fuel supplied to the engine. Also, the engine management system communicates with other vehicle systems, in particular, to a control system or an automatic gearbox with anti-theft system.
The components of the engine management system is very reliable and virtually maintenance free. During maintenance, you only need to replace the air filter and spark plugs. As for testing, adjusting and repair of the engine management system is necessary to use a complicated expensive equipment, then the work should be performed at a specialized workshop.
During operation of the vehicle do not need to make adjustment of turns of idling and the maintenance WITH in exhaust gases.
A warning  At work on the ignition system with the ignition must be careful, because you can get an electric shock from the high-voltage part of the ignition system. People with pacemakers are not advisable to check and repair the engine management system. Turn off the ignition before connecting or disconnecting any element of the ignition system or the stylus instrument.
The fuel system is under constant pressure even after the engine is switched off, so when carrying out any work on the fuel system must be depressurised.
To prevent accidental short-circuits the circuit and damage to electronic components engine management system, always remove a wire of weight from the accumulator.
Before performing any work on the engine management system call recorded in the memory of her fault. Also, check the tightness of the fuel system and the air supply to the engine.
Normal operation of the engine management system is only possible when the vehicle supply voltage is not lower than 11.5 V.
If after carrying out work on the engine management system, the engine starts and stops after a short time, perhaps, the engine turns off anti-theft system. In this case, the call from the memory stored therein the fault and, if necessary, adjust the motor control system.
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