MTU MS15025/00E - Page 35

Engine does not reach rated speed
Component Cause Action
Fuel supply Fuel prefilter (if fitted) clogged Clean filter element (see manufactur‐
er's documentation).
Fuel filter clogged Replace (→ Page 42).
Air supply Air filter clogged Replace air filter (→ Page 44).
Fuel injection equip‐
ment
Injector faulty Contact Service.
Engine wiring Faulty Check (→ Page 62).
Engine Overloaded Contact Service.
Table 5: Engine does not reach rated speed
Engine speed not steady
Component Cause Action
Fuel injection equip‐
ment
Injector faulty Contact Service.
Speed sensor Faulty Contact Service.
Fuel system Air in fuel system, if fault occurs after
filling the system
Vent fuel system (→ Page 41).
Engine Control Unit Faulty Contact Service.
Table 6: Engine speed not steady
Charge-air temperature too high
Component Cause Action
Engine coolant Engine coolant treatment incorrect Check (MTU test kit).
Intercooler Contaminated Contact Service.
Engine room Air-intake temperature too high Check fan;
check air inlet/outlet ducts.
Table 7: Charge-air temperature too high
Charge-air pressure too low
Component Cause Action
Air supply Air filter clogged Replace air filter (→ Page 44).
Intercooler Contaminated Contact Service.
Exhaust turbocharger Faulty Contact Service.
Table 8: Charge-air pressure too low
Coolant leaks at intercooler
Component Cause Action
Intercooler Leaking, major coolant discharge Contact Service.
Table 9: Coolant leaks at intercooler
MS15025/00E 2011-12 | Troubleshooting | 35
TIM-ID: 0000032516 - 002