Component description Group 30: Electrical system
16
Sensor, fuel pressure
The sensor measures fuel pressure and is located on
the fuel filter bracket. The sensor is an active sensor,
i.e. the sensor requires a supply voltage of +5 Volt.
The sensor provides an output signal whose voltage is
proportional to the pressure that the sensor measures.
Coolant temperature sensor
The sensor is located on the cylinder head, at the rear
end of the engine.
The sensor senses the engine coolant temperature
and sends the information to the engine control unit.
The sensor consists of a non-linear resistor, whose re-
sistance varies with coolant temperature. The resis-
tance falls as the coolant temperature rises.
Sensor, common rail pressure
(fuel)
The sensor is mounted on the right of the engine, at
the front of the common rail, which distributes fuel to
the injectors.
The rail pressure sensor senses the fuel pressure and
converts this to a voltage which is registered by the
engine control unit.
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