6.2 Troubleshooting
Engine does not turn when starter is actuated
Cause Corrective action
Battery flat or defective. u Charge or replace battery (see manufacturer's documentation).
Cable connections on battery
are defective.
u Check if cable connections are properly secured (see
manufacturer's documentation).
Engine wiring or starter
defective.
u Check if cable connections are properly secured, contact
Service.
Engine wiring faulty. u Check (→ Page 214).
Assemblies are not correctly
connected in control panel LOP.
Plug-in connections at LOP
control panel are loose.
u Perform visual inspection (→ Page 223).
Plug connection are loose at
engine control unit ECU.
u Check plug connections (→ Page 218).
Engine blocked (cannot be
rotated by hand).
u Contact Service.
Start interlock limit switch is not
installed.
u Check limit switch (→ Page 217).
Start interlock limit switch is
defective.
u Check limit switch (→ Page 217).
Wiring of start interlock limit
switch is faulty.
u Check wiring (→ Page 214).
Engine turns but does not fire
Cause Corrective action
Poor rotation by starter: Battery
flat or defective.
u Charge or replace battery (see manufacturer's documentation).
Engine wiring faulty. u Check (→ Page 214).
Air in fuel system. u Vent fuel system (→ Page 171).
Engine control unit ECU is
defective.
u Contact Service.
Engine fires unevenly
Cause Corrective action
Injector faulty. u Replace (→ Page 163).
Injection pump faulty. u Replace (→ Page 160).
Engine wiring faulty. u Check (→ Page 214).
Air in fuel system. u Vent fuel system (→ Page 171).
Engine control unit ECU is
defective.
u Contact Service.
130 | Troubleshooting | MW15406/17E 2014-05
TIM-ID: 0000042073 - 001
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