MTU 20V4000M73 series, Operating Instructions Manual

Page: 96 / 252

6.2 Troubleshooting
Engine does not rotate when starter is actuated.
Cause Corrective action
Battery discharged or faulty. u Charge or replace (see special documentation).
Battery: Cable connections faulty. u Check if cable connections for secure seating (see special
documentation).
Starter: Incorrect design of power
supply (battery/cable) u Check starter power supply and correct the design if necessary
(battery/cable resistance).
Engine cabling faulty. u Check (→ Page 218).
Assemblies or connectors on LOP
loose. u Inspect visually.
Plug connections on Engine
Control Unit loose. u Check plug connections (→ Page 220).
Plug connections on Engine
Interface Module (EIM) loose. u Check plug connections (→ Page 222).
Fuse F1 (→ Page 49) in engine
wiring harness faulty (fuse lamp
on EIM flashes with relevant
flashing code).
u
Check fuse, replace as necessary, and re-start system by actuating
key switch.
Engine blocked (crankshaft
cannot be rotated by hand). 1. Check start interlock (→ Page 219).
2. Contact Service.
Engine rotates when started but does not fire.
Cause Corrective action
Poor turning on starter: Battery
discharged or faulty. u Charge or replace battery (see special documentation).
Engine cabling faulty. u Check (→ Page 218).
Engine Control Unit faulty. 1. Replace (→ Page 224).
2. Contact Service.
Starter: Incorrect design of power
supply (battery/cable) u Check starter power supply and correct the design if necessary
(battery/cable resistance).
Engine fires unevenly.
Cause Corrective action
Engine cabling faulty.
u
Check (→ Page 218).
Injector defective.
u
Replace (→ Page 151).
Engine Control Unit faulty. 1. Replace (→ Page 224).
2. Contact Service.
94 | Troubleshooting | MS150046/03E 2018-08
TIM-ID: 0000044073 - 004