Troubleshooting - MTU 12V4000M*3 series Operating Instructions Manual

7 Troubleshooting

7.1 Troubleshooting
Engine does not turn when starter is actuated
Cause
Battery low or faulty
Battery: Cable connections faulty
Engine cabling or starter faulty
Engine cabling faulty
Loose plug connections on Engine
Control Unit
Loose plug connections on Engine
Interface Module (EIM)
Fuse F1 (→ Page 338)in engine
wiring harness faulty (fuse lamp
on EIM flashes with relevant
flashing code)
Engine blocked (engine cannot be
barred manually)
Engine turns on starting but does not fire
Cause
Poor rotation by starter: Battery
low or faulty
Engine cabling faulty
Engine Control Unit faulty
Engine fires unevenly
Cause
Injector faulty
Engine cabling faulty
Engine Control Unit faulty
Engine does not reach nominal speed
Cause
Fuel filter clogged
Air supply: Air filter clogged
Fuel injection: Injector faulty
Engine cabling faulty
Engine: Overload
132 | Troubleshooting | MS15036/00E 2018-08
Corrective action
u Charge or replace (see separate documentation).
u Check firm seating of cable connections (see separate
documentation).
u Check firm seating of cable connections, contact Service.
u Check (→ Page 346).
u Check plug connections (→ Page 348).
u Check plug connections (→ Page 351).
u Check fuse (replace as necessary) and re-start the system by
actuating the key switch.
u Contact Service.
Corrective action
u Charge or replace battery (see separate documentation).
u Check (→ Page 346).
u Contact Service.
Corrective action
u Replace (→ Page 256).
u Check (→ Page 346).
u Contact Service.
Corrective action
u Replace (→ Page 266).
u Check signal ring position of service indicator (→ Page 295).
u Replace (→ Page 256).
u Check (→ Page 346).
u Contact Service.