Ford Focus>> Management of the power unit and the fulfilled gases>> EEC-V control unit injection>> Elements of a control system of EEC-V injection
The control unit the power EEC-V unit with the built-in PATS block - constantly analyzes the current data arriving to it from various units of the car (number of turns, pressure in an inlet collector, air temperatures on an admission, cooling liquid etc.), and compares them to the characteristics brought in memory of the module. After comparison of data the control unit sets the moment of opening of nozzles with electromagnetic management, amount of fuel and structure of a working mix. The EEC-V control unit can be reprogrammed. This one of the most important advantages of a control system when it is possible to make calibration in connection with emergence of new strategy. Other advantage: by means of the figurative diagnostic Ford "FDS-2000" device reprogramming can be easily solved and the program is adjusted according to new requirements for management.

Fig. 196. The safety relay of a power supply system of fuel in front, on the right in feet

The safety relay of system of injection of fuel is established on a lateral wall before a door of the passenger sitting to the right of the driver (fig. 196) . The relay interrupts supply of fuel at leak detection in a power supply system, at failure and strong rocking. Interruption of supply of fuel you can distinguish on put forward up relay buttons. To activate the relay, check at first a power supply system on leaks, further transfer the ignition key to the situation "About" and press the relay button. Then switch the ignition key for some seconds in situation "II" and it is final — in situation "I".
The sensor of a mass consumption of air (MAF) is established in front of the butterfly valve case. At the heart of operation of the MAF sensor a heating thread. The onboard processor receives the valid density of soaked-up air from various extent of heating of a thread. The signal of the MAF sensor influences on:
- amount of injected fuel;
- corner of an advancing of ignition;
- valve of adjustment of rotation of a cranked shaft idling (IAC);
- catching system паров fuels (EVAP);
- control system of low pressure (EGR);
- management of the oxygen sensor.
The sensor of management is established by situation by a butterfly valve (TP) directly in the butterfly valve case. Works by a potentiometer principle. Signals of TR of the sensor influence on:
- amount of injected fuel;
- regulation of system of idling and corner of an advancing of ignition.

Fig. 197. Installation of nozzles: 1 — a nozzle; 2 — the fuel distributor

Fuel nozzles with four openings are established on the general distributor of fuel (fig. 197) .
The sensor of temperature of soaked-up air is established directly in the MAF sensor case. Signals of the IAT sensor are used for correction of amount of injected fuel and idling adjustment.
The sensor of an angle of rotation of a cranked shaft (CKP) is established on the majority of models of Focus cars on a flange of the block of cylinders. The sensor reports data on the angular provision of a cranked shaft, and also the current number of turns of the engine. Its signals influence on:
- amount of injected fuel and injection time;
- ignition time;
- adjustment of turns of a cranked shaft idling.

Fig. 198. CKP sensor installation: 1 — the CKP sensor; 2 — an alarm opening for the sensor

Failure of this sensor will paralyse completely engine management. The engine is not started before sensor replacement (fig. 198) .
The sensor of an angle of rotation of a camshaft (SMR) is established on a block head before the first cam of a final camshaft. The sensor works by a principle of a magnetic induction. It operates consecutive injection of fuel. On its signal the control unit reckons gazoraspredeleniye phases from the 1st cylinder.
Lambda probe (HO2S) it is established directly in a final collector. It transfers to the control unit data on the content of oxides in the fulfilled gases. To reduce its time of operation (about 3 c) to a minimum, the lambda probe at each start-up of the cold engine is in addition warmed up. The signal a lambda probe influences amount of injected fuel and work of system of catching паров fuels (EVAP). The oxygen sensor strongly influences work and service life of catalytic converter.
The relay of turning on of the hydraulic booster of steering pressure (PSP) - is established on the pipeline of the pump of a high pressure, on the right in a motor compartment. It joins at emergence of pressure in hydraulic system. The signal from the relay estimates EEC-V if necessary to lift idling turns. PSP influences on:
- adjustment of rotation of a cranked shaft idling;
- amount of injected fuel;
- moment of ignition of a working mix.
The sensor of speed (VSS) is established on a transmission case. Works by a principle of the sensor of the Hall.