The needle movement sensor is integrated in the injection nozzle of cylinder No. 4 and cannot be replace separately. The sensor registers the start of injection at cylinder No. 4 which represents the actual value for start of injection control.
The needle movement sensor consists of a coil which receives a constant, defined current of 30 to 35 mA from the DDE control unit. Movement of the nozzle needle generates a voltage signal that is evaluated by the DDE control unit.
Monitoring requires a battery voltage above 9 V. Fault code 5 "needle movement sensor" is stored if the needle movement sensor is defective.
Consequences: