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Engine does not reach nominal speed
Cause
Corrective action
Fuel prefilter (not switchable)
clogged
u
Replace (→ Page 239).
Fuel prefilter (switchable) clogged
u
Replace (→ Page 241).
Fuel filter clogged
u
Replace (→ Page 230).
Air filter clogged
u
Check signal ring position of service indicator (→ Page 254).
Injector faulty
u
Replace (→ Page 212).
Engine wiring faulty
u
Engine: Excessive load
u
Contact Service.
Engine speed not steady
Cause
Corrective action
Injector faulty
u
Replace (→ Page 212).
Speed transmitter faulty
u
Contact Service.
Air in fuel system
u
Vent fuel system (→ Page 225).
Engine Control Unit faulty
u
Contact Service.
Charge-air temperature too high
Cause
Corrective action
Engine coolant mixture incorrect
u
Check (→ MTU test kit).
Intercooler contaminated
u
Contact Service.
Engine room: Air intake
temperature too high
u
Check fans and intake/exhaust lines.
Charge-air pressure too low
Cause
Corrective action
Air pipework leaking
u
Check air pipework for leakage.
Air filter clogged
u
Check signal ring position of service indicator (→ Page 254).
Intercooler contaminated
u
Contact Service.
Exhaust turbocharger faulty
u
Contact Service.
Throttle flap blocked
u
Read out fault code, check position of lever (→ Page 247).
Coolant leak at intercooler
Cause
Corrective action
Intercooler leaking, major coolant
discharge
u
Contact Service.
MS15065/01E 2019-01
| Troubleshooting | 185
TIM-ID: 0000076670 - 002