M54 engine fuel injection BMW X5 E53

Fuel injection system — general information
The engines are equipped with a comprehensive control system — electronic KSUD. It is designed to control the engine's operating processes to ensure the...

Fuel injection control subsystem
The fuel injection control subsystem is an improved electronic fuel injection system with a hot-wire air mass flow meter; the Motronic system was taken as the...

Data for verification and adjustment
Engine crankshaft speed at idle speed 750-850 min⁻¹ The content of carbon monoxide (CO) in the exhaust gas at idle speed of a vehicle equipped with a...

Idle speed control valve
The crankshaft speed in idle mode is maintained constant by the idle speed regulator (Fig. 3.23), which is located in the bypass air channel, made parallel to...

Fuel pressure regulator
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 main
The distribution main is a cavity with sockets (holes) for installing injectors and fuel supply fittings (Fig. 3.25). It is covered with a protective casing....

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

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

Camshaft Position Sensor
The 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 a resistor with a negative temperature coefficient, meaning its resistance decreases as the temperature increases. During...

Incoming air temperature sensor
The intake air temperature sensor also has a negative temperature coefficient. It is installed on the air intake manifold, and its terminals send signals of...

Exhaust oxygen concentration sensor
Oxygen concentration sensors in the exhaust gas are installed in a complex with a triple-action catalytic converter. They provide feedback between the process...

Additional functions of the KSUD
Additional functions of the KSUD are self-diagnostics, monitoring the maximum permissible engine crankshaft speed, controlling the purge of the adsorber,...

Knock Sensor — General Information
The knock sensor is positioned in a location that provides optimal knock detection in all engine cylinders. The vibrations of the engine block during knocking...

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

Checking the operation 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. The...

Fuel injection system defect
Analysis of the curve of the maximum value of breakdown voltage when pressing the gas pedal sharply (Fig. 3.50): 1 — the amplitude of the onset of the...

Replacing the injection system injectors
Injector (nozzle) malfunction is manifested by unstable engine operation and poor engine start-up when warmed up. During short-term engine operation after the...

Replacement of the distribution main
The replacement of the injection system distribution line assembly must be carried out in the following order. Prepare a container and rags to collect the...

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BMW E53 (1999-2006)