The rail-pressure sensor registers the fuel pressure in the rail and serves as a measured value transducer for volume metering and rail pressure control.
The rail pressure sensor is mounted on the rear end of the rail. The DDE control unit supplies the sensor with ground (M_KDF) and a supply voltage of 5 V (U_KDF).
The pressure is picked up by a hole in the sensor and a corresponding measurement voltage (A_KDF) is sent to the DDE control unit).
Fault code ”Rail pressure sensor” is stored if the rail pressure sensor is defective.
Consequences: