RPM Sensor, Injection Pump DDE 3.0

The speed or rpm sensor is integrated in the injeciton pump and cannot be replaced separately.

The signal of the rpm sensor for the injection pump is processed into following functions:

• Start of injection control
  
• Monitoring of crakshaft position/rpm sensor
  

Troubleshooting

The following faults are monitored:

• Fault code 2E: Injection pump speed sensor (overspeed detection only if crankshaft position/rpm sensor is also defective at the same time)
  Consequence: Engine shuts down
  
• Fault code 49: Injection pump rpm sensor (rpm sensor defective)
  Consequence: Engine shuts down
  
• Fault code 47: Synchronism of rpm sensors (injection pump rpm sensor and crankshaft rpm sensor not synchronous with respect to each other)
  Consequences: Injection quantity limited to 25 mg/stroke and changeover to start of injection open-loop control