MTU 20 V 4000 G23 Technical Publication page 75

70
Engine does not reach nominal speed
Component
Fuel supply
Air supply
Fuel injection equipment
Engine wiring
Engine
Engine speed not steady
Component
Fuel injection equipment
Speed sensor
Fuel system
ECU
Charge-air temperature too high
Component
Engine coolant
Intercooler
Engine room
Charge air pressure too low
Component
Air supply
Intercooler
Exhaust turbocharger
Coolant leaks on intercooler
Component
Intercooler
M015715/00E 06-08
Probable Cause
Fuel prefilter clogged
Fuel filter clogged
Air filter clogged
Injector defective
Defective
Overloaded
Probable Cause
Injector defective
Defective
Not vented
Defective
Probable Cause
Incorrect coolant concentration
Contaminated
Air-intake temperature too high
Probable Cause
Air filter clogged
Contaminated
Defective
Probable Cause
Leaking, major coolant discharge
Task
Replace (→ Page 119).
Replace (→ Page 112).
Check signal ring position of service indicator
(→ Page 125).
Replace (→ Page 106).
Check (→ Page 151).
Contact Service.
Task
Replace (→ Page 106).
Contact Service.
Vent fuel system (→ Page 111).
Contact Service.
Task
Check (MTU test kit).
Contact Service.
Check fans and air supply / ventilation ducts.
Task
Check signal ring position of service
indicator (→ Page 125).
Contact Service.
Contact Service.
Task
Contact Service.
Troubleshooting
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