S60 L5-2.4L VIN 64 B5244S6 (2003)
Fuel Pressure Sensor: Description and Operation
Fuel Pressure Sensor (Only Vehicles With Demand Controlled Fuel Pumps)
The fuel pressure sensor is combined and consisted of both the fuel pressure sensor and the fuel temperature sensor. The sensor detects the fuel pressure
(the absolute pressure) and the temperature of the fuel in the fuel rail.
Fuel Pressure Sensor
The pressure sensor is a Piezo resistive type resistor, the resistance of which changes with the pressure. The signal voltage varies with the pressure in the
fuel rail. Low pressure produces low voltage, high pressure produces high voltage.
The engine control module (ECM) compares the signal with its integrated atmospheric pressure sensor. The engine control module (ECM) uses the fuel
pump control module to regulate the pressure in the fuel rail. See also: Function
The engine control module (ECM) can diagnose the fuel pressure sensor. Its signals (pressure and temperature can be read using VADIS/VIDA.
NOTE: The absolute pressure is displayed when using VADIS/VIDA parameter read outs to read off the fuel pressure. If there is no pressure at the fuel
rail, the atmospheric pressure will be displayed.
HINT: The relative pressure (absolute pressure minus atmospheric pressure) is displayed when reading off the fuel pressure via a manometer connected
to the fuel rail.
