MTU 20 V 4000 G23, Technical Publication

Page: 74 / 178

Troubleshooting 69
5 Troubleshooting
5.1 Troubleshooting
Engine does not turn when starter is actuated
Component Probable Cause Task
Low or defective Charge or replace (see manufacturer’s
documentation). Battery
Cable connections defective Check if cable connections are
properly secured (see manufacturer’s
documentation).
Starter Engine wiring or starter defective Check if cable connections are properly
secured, contact Service.
Engine wiring Defective Check ( → Page 151).
Engine/generator control
system Secure seating of assemblies or
connectors not provided Perform visual inspection (see
manufacturer’s documentation).
ECU Plug-in connections are loose Check plug-in connections ( → Page 153).
Engine Running gear blocked (engine
cannot be barred manually)
Contact Service.
Engine turns but does not fire
Component Probable Cause Task
Starter Poor rotation by starter: Battery
low or defective
Charge or replace battery (see
manufacturer’s documentation).
Engine wiring Defective Check ( → Page 151).
Fuel system Not vented Vent fuel system ( → Page 111).
ECU Defective Contact Service.
Engine fires unevenly
Component Probable Cause
Task
Fuel injection equipment Injector defective Replace ( → Page 106).
Engine wiring Defective Check ( → Page 151).
Fuel system Not vented Vent fuel system ( → Page 111).
ECU Defective Contact Service.
M015715/00E 06-08 © MTU