Engine does not reach rated speed
Component Cause Measure
Fuel supply Fuel inlet closed off Completely open shutoff valve up‐
stream of fuel prefilter.
Fuel prefilter clogged Replace (→ Page 201).
Fuel easy-change fuel filter clogged Replace (→ Page 195).
Air supply Air filter clogged Check signal ring position of contami‐
nation indicator (→ Page 206).
Fuel injection equip‐
ment
Injector faulty Replace (→ Page 183).
Injection pump defective Replace (→ Page 180).
Engine wiring Faulty Check (→ Page 234).
Engine Overloaded Contact Service.
Engine speed not steady
Component Cause Measure
Fuel injection equip‐
ment
Injector faulty Replace (→ Page 183).
Injection pump defective Replace (→ Page 179).
Speed sensor Faulty Contact Service.
Fuel system Air in fuel system Vent fuel system (→ Page 193).
ECU Faulty Contact Service.
Charge-air temperature too high
Component Cause Measure
Engine coolant Engine coolant treatment incorrect Check (MTU test kit).
Intercooler Contaminated Contact Service.
Engine room Air-intake temperature too high Check fans
Check air inlet/outlet ducts.
Charge-air pressure too low
Component Cause Measure
Air supply Air filter clogged Check signal ring position of contami‐
nation indicator (→ Page 206).
Intercooler Contaminated Contact Service.
Exhaust turbocharger Faulty Contact Service.
Coolant leaks at intercooler
Component Cause Measure
Intercooler Leaking, major coolant discharge. Contact Service.
150 | Troubleshooting | MW15550/06E 2012-02
TIM-ID: 0000002547 - 002
To Next Page
Loading...
Need help?
General