M54 engine fuel injection BMW X5 E53

Fuel injection system — general information
The engines are equipped with an integrated control system - electronic type KSUD. It is designed to control the working processes of the engine to ensure the...

Fuel injection control subsystem
The fuel injection control subsystem is an advanced electronic fuel injection system with a hot-wire mass air flow meter, based on the system «Motronic», its...

Data for checking and adjusting
Engine speed at idle 750—850 min -1 Carbon monoxide content (SO) in OT in the idle mode of a car equipped with a converter - 0.2-0.12%, without an exhaust gas...

Idle speed controller
The idle speed is maintained constant by the idle speed controller (pic. 3.23), which is located in the bypass, air channel, made parallel to the throttle...

Fuel pressure control
The diaphragm-type fuel pressure regulator is designed to maintain a constant pressure of the injected fuel, depending on the vacuum in the intake manifold. It...

Distribution line
The distribution line is a cavity with nests (holes) for installation of injectors and fuel supply fitting (pic. 3.25). It is covered with a protective cover....

Injectors — general information
Injectors (solenoid valve injectors) are designed for metered supply of fuel injected into the engine intake channel, carried out by electromagnetic nozzles...

Throttle body
The throttle body consists of the throttle body itself (pic. 3.27) and its position sensor. 1 - body; 2 - throttle valve; 3 - idle bypass channel; 4 - idle air...

Camshaft position sensor
Camshaft position sensors are mounted on the cylinder head and are designed to determine the position of the cylinders for the ignition and injection...

Crankshaft speed sensor
The crankshaft speed sensor is installed on the cylinder block in the area of the sixth cylinder, above its flywheel and is designed to determine the engine...

Coolant temperature sensor
The coolant temperature sensor is an NTC resistor, i.e. its resistance decreases as the temperature rises. While the engine is warming up, the ECU-KSUD...

Intake air temperature sensor
The intake air temperature sensor also has a negative temperature coefficient. It is installed on the air inlet pipe, and from its outputs to the ECM, the...

Exhaust oxygen sensor
The oxygen concentration sensors in the exhaust gas are installed in combination with a triple-acting catalytic converter. They provide feedback between the...

Additional functions of KSUD
Additional functions of the CMDC are self-diagnosis, control of the maximum permissible engine speed, adsorber purge control, activation of the fuel pump and...

Knock sensor — general information
The knock sensor is located in a location that provides optimal knock detection in all engine cylinders. The vibrations of the engine block during detonation...

Engine ventilation system
The concentration of hydrocarbons in the engine crankcase can be many times higher than that recorded in the OT. Crankcase ventilation control system (pic....

Checking the functioning of the ECU-KSUD of the «DME» system
Depending on the version, the diagnostic connector for connecting the test equipment can be located in the engine compartment or in the driver's footwell....

Fuel injection system defect
Analysis of the curve of the maximum value of the breakdown voltage when the gas pedal is sharply pressed (pic. 3.50): 1 - the amplitude of the beginning of...

Replacement of injection system injectors
Malfunction of injectors (nozzles) manifests itself during unstable operation of the engine and its poor start in a warm state. In the continuation of...

Distribution line replacement
Replacement of a distributive highway of system of injection in gathering it is necessary to carry out in a following order. Prepare a container and rags for...