Troubleshooting - MTU 20 V 4000 M93 x Operating Instructions Manual

6.2 Troubleshooting

Engine does not turn when starter is actuated
Cause
Battery low or faulty
Battery: Cable connections
faulty
Engine cabling or starter faulty
Engine wiring defective
Assemblies or connectors on
LOP possibly loose
Plug-in connections on Engine
Control Unit possibly loose
Plug-in connections on Engine
Interface Module (EIM) possibly
loose
Fuse F1 (→ Page 35) in engine
wiring harness faulty (fuse lamp
on EIM flashes with relevant
flashing code)
Running gear blocked (engine
cannot be barred manually)
Engine turns but does not fire
Cause
Poor rotation by starter: Battery
low or faulty
Engine wiring defective
Engine Control Unit defective
Engine fires unevenly
Cause
Injector faulty
Engine wiring defective
Engine Control Unit defective
Engine does not reach rated speed
Cause
Easy-change fuel filter clogged
Air supply:Air filter clogged
Fuel injection: Injector faulty
Engine wiring defective
Engine: Overloaded
Corrective action
u Charge or replace (see special documentation).
u Check if cable connections are properly secured (see special
documentation).
u Check if cable connections are properly secured, contact
Service.
u Check (→ Page 174).
u Inspect visually.
u Check plug connections (→ Page 181).
u Check plug connections (→ Page 180).
u Check fuse (replace if required) and re-start the system by
actuating the key switch.
u Contact Service.
Corrective action
u Charge or replace battery (see special documentation).
u Check (→ Page 174).
u Contact Service.
Corrective action
u Replace (→ Page 123).
u Check (→ Page 174).
u Contact Service.
Corrective action
u Replace (→ Page 129).
u Check signal ring position of service indicator (→ Page 142).
u Replace (→ Page 123).
u Check (→ Page 174).
u Contact Service.
MS150048/04E 2013-07 | Troubleshooting | 79