3780

Rail pressure: High controller output idling

Monitoring for rail pressure controller idlingSystem reaction: Engine can stop due to insufficient rail pressure

SPN 3780 RAIL PRESSURE: HIGH CONTROLLER OUTPUT IDLING

Fault display:Central fault lamp flashes red whilst driving and when stationary, stop indicationon display (priority 1)

Monitoringstrategy:

Monitoring for rail pressure controller idling

Effect of fault: Engine can stop due to insufficient rail pressure

Refer to the diagrams for the vehicle in question

Testing Measurement Correcting the fault

Fuel system Check according to hydraulic test step list• See hydraulic test step

list

Metering unit(MProp)

Resistance measurement between pin A08and A10Nominal value: 2.5 – 4.5 Ω

• Check lines • Check plug connectors

Rail pressuresensor

Check the plug connection on the sensor forloose contact

• Repair or renew theconnector• Renew rail pressure

sensor