416 – SS P-Coolant Intercooler
Yellow alarm; warning
Cause
Corrective action
Coolant pressure in intercooler
too low (Level 2).
1. Check coolant level in expansion tank, top up as necessary.
2. Check coolant circuit for leaks.
3. Check coolant pump.
417 – SD Level Water Fuel Prefilter
Yellow alarm; warning
Cause
Corrective action
Water level sensor of fuel
prefilter faulty, short circuit or
wire break.
u
Check sensor F70 and wiring, replace as necessary .
438 – LO P-Fuel 2 (Common Rail)
Yellow alarm; warning
Cause
Corrective action
Rail pressure below specified
value.
HP fuel control block faulty or
leakage in HP fuel system.
u
Contact Service.
439 – HI P-Fuel 2 (Common Rail)
Yellow alarm; warning
Cause
Corrective action
Rail pressure above specified
value.
HP fuel control block jamming or
wiring faulty.
1. Check wiring of HP fuel control block.
2. Contact Service if no malfunction can be detected.
441 – AL System 2 Leaky
Yellow alarm; warning
Cause
Corrective action
Pressure gradient in rail is too
low during starting or too high
during stopping.
1. On engine stopping: Seal off system, contact Service.
2. On engine starting: Check engine for leakage, if none found,
attempt restarting as per operating instructions (air in system).
444 – SD U-PDU
Yellow alarm; warning
Cause
Corrective action
Sensor of injector output stage
faulty.
u
Replace Engine Control Unit.
86 | Troubleshooting | MS150118/01E 2015-05
TIM-ID: 0000060724 - 001