Function The boost pressure control valve is provided with a vacuum by the vacuum pump. Pulse-width modulated signals from the PCM control this vacuum via the boost pressure control valve. The controlled vacuum acts on the vacuum unit in the variable geometry turbocharger. Effects of faults In the event of a fault, boost pressure control… Read More »
A Fuel injector closed B Voltage pulse from the PCM: Start of charging phase, fuel injector begins to open C Injection D Voltage pulse from the PCM: Start of discharging phase, injection ends 1 PCM 2 Piezo actuator 3 Injector needle The piezo-electrically controlled fuel injectors switch up to four times more rapidly than electro-magnetically… Read More »
1 Electromagnetically operated fuel pressure control valve 2 Valve seat 3 Valve ball 4 Coil 5 Armature 6 Compression spring 7 Pin NOTE: During repair, the high pressure control valve may not be removed from the high pressure pump. The pump may only be replaced as a complete unit. The fuel pressure control valve is… Read More »
1 Electromagnetically operated fuel metering valve 2 Piston 3 Bush 4 Compression spring 5 Coil 6 Armature NOTE: During repair, the fuel metering valve must not be removed from the high pressure pump. The pump may only be replaced as a complete unit. The fuel metering valve is bolted directly onto the high pressure pump.… Read More »
The illustration shows the fuel pressure sensor on the fuel rail of the of the 2.0L Duratorq-TDCi (DW) diesel engine. 1 Fuel pressure sensor NOTE: The fuel pressure sensor must on no account be removed from the fuel rail during servicing. The fuel pressure sensor measures the current fuel pressure in the fuel rail very… Read More »
Figure depicts version of 1.8L Duratorq-TDCi (Kent) diesel in S-MAX/Galaxy 2006.5 (02/2006-) 1 Intake manifold flap vacuum unit 2 Intake manifold flap 3 Intake manifold flap position sensor NOTE: The intake manifold flap position sensor is only installed for certain versions with intake manifold flap. NOTE: In the 1.8L Duratorq-TDCi (Kent) diesel engine in the… Read More »
1 Wheel speed sensors 2 ABS module 3 PCM There are two methods available for detecting the vehicle speed: • Use of a VSS on vehicles with no ABS, • Via the wheel speed sensors for vehicles with ABS. The signal from the wheel speed sensors is transmitted via the CAN data bus. The PCM… Read More »
1 MAF sensor 2 Mark showing installation direction Depending on the version, two different MAF sensors are used: • analog MAF sensor – transmits an analog voltage signal to the PCM, where an analog/digital converter converts the signal for further processing. • digital MAF sensor – an integrated circuit in the MAF sensor converts the… Read More »
NOTE: A CHT sensor that has already been removed may no longer be used. The CHT sensor is screwed into the cylinder head and measures the material temperature. It replaces the familiar ECT sensor. By measuring the material temperature, engine overheating (e.g. through the loss of coolant) is clearly detected. At high temperatures, the resolution… Read More »
Function The ECT sensor is located in the small coolant circuit of the engine and measures the coolant temperature. The voltage value supplied by the ECT sensor is assigned to a corresponding temperature value by the PCM. The ECT is used for the following calculations: • Idle speed, • Injection timing, • Injected fuel quantity,… Read More »