Engine speed not steady
Cause
Corrective action
Fuel injection: Injector faulty
u
Replace (→ Page 152).
Speed transmitter defective
u
Contact Service.
Engine Control Unit defective
u
Contact Service.
Charge air temperature too high
Cause
Corrective action
Engine coolant treatment
incorrect
u
Check (MTU test kit).
Intercooler clogged
u
Contact Service.
Engine room: Air-intake
temperature too high
u
Check fans and air supply / ventilation ducts.
Charge-air pressure too low
Cause
Corrective action
Air supplyAir filter clogged
u
Check signal ring position of service indicator (→ Page 174).
Intercooler clogged
u
Contact Service.
Exhaust turbocharger defective
u
Contact Service.
Coolant leaks at intercooler
Cause
Corrective action
Intercooler leaky, major coolant
discharge
u
Contact Service.
Black exhaust gas
Cause
Corrective action
Air supply:Air filter clogged
u
Check signal ring position of service indicator (→ Page 174).
Fuel injection: Injector faulty
u
Replace (→ Page 152).
Engine: Overloaded
u
Contact Service.
Blue exhaust gas
Cause
Corrective action
Too much oil in engine
u
Drain engine oil (→ Page 178).
Oil separator or oil-preseparator
of crankcase breather clogged
u
Replace.
Exhaust turbocharger, cylinder
head, piston rings, cylinder liner
defective
u
Contact Service.
110 | Troubleshooting | MS150045/02E 2013-07
TIM-ID: 0000044073 - 001
