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REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Volkswagen Sharan (from 1995 to 2000, the year of issue)

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Volkswagen Sharan
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Sharan
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VR6 engine
The two-liter engine (ADY)
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A fuel injection system VR6 engine
The system Simos injection 2.0-liter engine
General description and operation of the system Simos
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General description and operation of the system Simos



On the 2.0-liter engine is a new system of multipoint (distributed) injection called Simos, formed from the name of his company's products - ?«Siemens?». This advanced multi-point injection system has all the same parts as described electronic injection engine VR6, except that it has only one knock sensor and only 4 jets.

Location Simos injection system in the engine compartment, the 2.0-liter engine
Fig. 207. Location Simos injection system in the engine compartment, the 2.0-liter engine: 1 - a tank with the activated coal; 2 - the electromagnetic valve; 3 - nozzle; 4 - fuel pressure regulator; 5 - four-plug connector; 6 - high-voltage transformer; 7 - EGR valve; 8 - the injection computer and the ignition Simos; 9 - three-prong plug connector; 10 - the central plug connector; 11 - three-prong plug connector; 12 - the gauge of speed of movement; 13 - the ignition distributor with Hall sensor; 14 - the gauge of speed of the crankshaft of the engine; 15 - coolant temperature sensor; 16 - the gauge of detonation; 17 - connection with "weight"; 18 - the throttle body; 19 - air flow sensor; 20 - Intake air temperature sensor; 21 - air filter





Fuel under pressure, the magnitude of which is supported by a pressure regulator 4 (Fig. 207), is continuously fed to the nozzles 3 that are mounted directly to the inlet valves. ECU 8 calculates the injection pulse duration, and hence the composition of the fuel mixture, depending on the following parameters:
- Throttle position;
- The degree of vacuum or the pressure in the intake manifold;
- Speed of the engine crankshaft.
Electric fuel pump draws fuel from the tank and delivers it under pressure to the fuel distribution manifold. The pressure regulator controls the amount of fuel returned to the tank and maintains a constant fuel pressure to the injectors.
Based on the information received from the sensors computer generates a fuel injection time pulses. When a failure of a sensor control unit switches to the operating mode for "Default" with reduced efficacy on the basis of fixed parameters embedded in a block of memory the computer.
Location of the injection system in the engine compartment of a 2.0-liter engine Simos shown in Fig. 207.
Electronic fuel injection system consists of the following elements:
- A reservoir with activated carbon 1 placed on the right wheel housing;
- Solenoid valve 2 opens and closes the connection between the reservoir of activated carbon and the motor;
- Air flow sensor 19 is located between the air filter and air intake hose;

Location Simos injection system on the 2.0-liter engine
Fig. 208. Location Simos injection system on the 2.0-liter engine: 1 - the air filter; 2 - the tip of the wire intake air temperature sensor; 3 - wire tip cleaning system using activated carbon; 4 - to the crankcase; 5 - a fuel hose, a white mark; 6 - the upper part of the intake manifold; 7 - O-shaped sealing ring; 8 - bolt 16 Nm; 9 - installation and replace it with a new one; 10 - bolt 10 Nm; 11 - a bolt, 25 Nm; 12 - a tip of the wire nozzle; 13 - lower part of the intake manifold; 14 - to a compound of the cylinder head; 15 - to the expansion tank; 16 - Computer; 17 - a collar; 18 - the holder of the ECU; 19 - Multi-plug connector; 20 - snap clamp; 21 - the coolant temperature sensor; 22 - tip for wire (21); 23 - tip for wire (24); 24 - the gauge of frequency of rotation of the crankshaft; 25 - spacer ring; 26 - plug connector for lambda probe heating and lambda probe; 27 - lambda probe; 28 - a hose of the air intake; 29 - plug connector throttle body; 30 - a hose recycling blue mark; 31 - a tip of the wire air flow sensor





- Plug the four-block 5 is connected with the lambda probe 27 (Fig. 208) and heated oxygen sensor;
- Valve 7 EGR now increasingly called valve EGR;
ECU 8 Simos injection system and related system of ignition is located behind the instrument panel;
- Three-prong plug connector 9 knock sensor brown;
- Plug connector 10 speed sensor engine crankshaft black;
- In the ignition distributor 13 is a Hall sensor;
- Sensor 15 Coolant temperature black, is also the remote sensor of the thermometer located on the instrument panel;
- Function of the knock sensor 16 and the ignition coil 6 are described in section 8;
- 12 speed sensor informs the ECU about the current speed of the car;

The lower part of the intake manifold and air filter with fastening
Fig. 209. The lower part of the intake manifold and air filter mount 1 - distributing fuel line; 2 - bolt 10 Nm; 3 - safety clamp; 4 - O-shaped sealing ring; 5 - fuel pressure regulator; 6 - the upper part of the air filter; 7 - intake air temperature sensor; 8 - a rubber cap (note the proper installation); 9 - air filter element; 10 - lower part of the air filter; 11 - solenoid valve, a reservoir with activated carbon; 12 - grommet; 13 - rubber cap; 14 - rubber gasket; 15 - air flow sensor; 16 - bolt 10 Nm; 17 - a sealing ring; 18 - nozzle; 19 - lower part of the intake manifold





- Sensor 7 (Fig. 209) informs the computer about the temperature of the intake air;
- Sensor 14 (see. Fig. 207) informs the computer about the specific speed of the engine crankshaft.
The computer system includes Simos memory block or memory device which records all faults (faults) that occurred during operation, having three operating modes:
- Reading stored in the memory failures (faults) that occurred when the engine;
- Check mode of units and systems of the car;
- Mode fault diagnosis systems of injection and ignition with the engine stopped.
Query modes through DLC.
Erase the faults from the storage device is only possible at least after a single code reading mode (number 1) or after the elimination of detected faults (modes ?„–2 and 3).




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