Troubleshooting - MTU 12 V 2000 M84 Operating Instructions Manual

6.2 Troubleshooting

Engine does not turn when starter is actuated
Component
Battery
Starter
Engine wiring
ECU
Engine
Engine turns but does not fire
Component
Starter
Engine wiring
Fuel system
ECU
Engine fires unevenly
Component
Fuel injection equip‐
ment
Engine wiring
Fuel system
ECU
Engine does not reach nominal speed
Component
Fuel supply
Air supply
Fuel injection equip‐
ment
Engine wiring
Engine
Probable Cause
Low or defective
Cable connections defective
Engine wiring or starter defective
Defective
Plug-in connections are loose
Running gear blocked (engine cannot
be barred manually)
Probable Cause
Poor rotation by starter: Battery low or
defective
Defective
Not vented
Defective
Probable Cause
Injector defective
Defective
Not vented
Defective
Probable Cause
Fuel prefilter clogged
Fuel filter clogged
Air filter clogged
Injector defective
Defective
Overloaded
Task
Charge or replace (see manufacturer's
documentation).
Check if cable connections are proper‐
ly secured (see manufacturer's docu‐
mentation).
Check if cable connections are proper‐
ly secured, contact Service.
Check (→ Page 124).
Check plug-in connections for secure
seating.
Contact Service.
Task
Charge or replace battery (see manu‐
facturer's documentation).
Check (→ Page 124).
Vent fuel system (→ Page 81).
Contact Service.
Task
Replace (→ Page 78).
Check (→ Page 124).
Vent fuel system (→ Page 81).
Contact Service.
Task
Replace (→ Page 88).
Replace (→ Page 82).
Check signal ring position of service in‐
dicator (→ Page 93).
Replace (→ Page 78).
Check (→ Page 124).
Contact Service.
MS150063/01E 2012-01 | Troubleshooting | 55