In detail — EEC-V injection system control (Focus Turnier 1)

Control unit EEC-V-PCM (PATS integrated): electronic engine control center. The on-board computer constantly processes the current information (speed, intake manifold pressure, intake air temperature, coolant temperature, etc.) and compares it rigidly with the installed data pool. After comparing the data, the control unit determines and calculates, among other things, the opening time of the electromagnetically controlled injection valves, the fuel quantity and the air-fuel mixture. The EEC-V-PCM can be reprogrammed without replacing the PCM. An important criterion if you later install calibrations with modified strategies. Advantage: with the help of the Ford mobile diagnostic device "FDS 2000" you can easily erase the information in the EEPROM and "feed" it anew with the latest engine tuning programs. This service module is on board the EEC-V-PCM as standard.

Fuel injection system safety switch: in all Focus models, it is located in the side wall in front of the passenger door next to the driver. The switch interrupts the fuel supply in the event of a leak in the fuel system, an accident or strong vibrations. You will recognize a break in the electrical circuit by the switch button popping out. To activate the safety switch, first check the fuel system for leaks, then turn the ignition switch to position "0" and then press the switch. Then turn the ignition switch to position "II" for a few seconds and finally to position "I".

Fuel injection system safety switch. Activated in front right footwell.

Air Flow Meter (MAF Sensor): is located in front of the throttle body - between the intake air noise damper and the intake hose - in the engine compartment. The hot wire MAF flow meter operates on the principle of constant superheating. In order for the temperature difference in relation to the intake air passing by to remain constant, it is continuously heated. The on-board computer determines the actual density of the fresh air sucked in based on the different heating energy. The signals from the MAF sensor affect:

amount of fuel injected,
ignition timing,
idle air control valve (IAC),
eVAP (fuel evaporative emission) collection system,
reduced pressure regulation system (EGR),
lambda regulation.

Throttle Position Sensor (TP Sensor): is located directly on the throttle body. It works on the principle of a potentiometer. The signals from the TP sensor affect:

amount of fuel injected,
idle speed adjustment and forced idle mode disabling,
ignition timing.

Injection valves: four-port injection valves with side-feed fuel are housed in a common fuel distributor tube.

Mounted together: The four-port injection valves 1 in Focus petrol engines are located in a common fuel rail 2

Intake Air Temperature Sensor (IAT Sensor): is located directly in the MAE housing. The IAT sensor signals act as correction values for:

amount of fuel injected,
idle speed adjustment.

Crankshaft position sensor (CKP sensor): in all Focus engines is located on the gearbox flange of the engine block. The sensor inductively records the exact angle of the crankshaft position, as well as the current engine speed. Its measured values affect:

the amount of fuel injected and the injection moment,
ignition timing.
idle speed adjustment.

Failure of the CKP sensor paralyzes all engine control: the engine stops and does not start until the sensor is replaced.

1 - SCR sensor; 2 - flywheel pulse sector

Camshaft position sensor (CMP sensor): is located in the cylinder head in front of the first cam of the exhaust camshaft. The sensor operates on the inductive principle. It controls sequential fuel injection.

Its signal serves the EEC-V-PCM to recognize cylinder 1. The reference mark is the pulse cam of the exhaust camshaft.

Lambda probe (HO2S): is located directly in the exhaust manifold. It informs the control unit about the current content of residual oxygen in the exhaust gases. In order to reduce the response time to a minimum (approximately 3 s), the probe is additionally heated electrically after each cold engine start. The lambda probe signal affects:

amount of fuel injected,
operation of the evaporative emission control system (EVAP).

The lambda probe has a strong influence on the operation and service life of the catalytic converter. Its perfect operation depends on the constant change of slightly enriched and slightly lean fuel-air mixture.

Pneumatic Servo Pressure Switch (PSP): is located in the pressure line of the hydraulic servo control (on the right in the engine compartment). In the idle state, the switch is closed, it only opens at a specified pressure in the hydraulic system. Its signal is evaluated by the EEC-V-PCM control unit in order to increase the idle speed if necessary. The PSP switch affects: