Operating instructions

5 Troubleshooting
5.1 Troubleshooting
Engine does not turn when starter is actuated
Component Probable cause Task
Battery Low or defective Charge or replace (see manufacturer's
documentation).
Cable connections defective Check whether cable connections are
properly secured (see manufacturer's
documentation).
Starter Engine wiring or starter defective Check whether cable connections are
properly secured, contact Service.
Engine wiring Defective Check (→ Page 174).
LOP Seating of assemblies or connectors
possibly loose
Inspect visually.
ECU Plug-in connections possibly loose Check plug connections (→ Page 176).
Engine Running gear blocked (engine cannot
be barred manually)
Contact Service.
Engine turns on starting but does not fire
Component Probable cause Task
Starter Poor rotation by starter: Battery low or
defective
Charge or replace battery (see manu‐
facturer's documentation).
Engine wiring Defective Check (→ Page 174).
ECU Defective Contact Service.
Engine fires unevenly
Component Probable cause Task
Fuel injection equip‐
ment
Injector defective Replace (→ Page 125).
Engine wiring Defective Check (→ Page 174).
ECU Defective Contact Service.
Engine does not reach rated speed
Component Probable cause Task
Fuel supply Easy-change fuel filter clogged Replace (→ Page 131).
Air supply Air filter clogged Check signal ring position of service in‐
dicator (→ Page 138).
Fuel injection equip‐
ment
Injector defective Replace (→ Page 125).
Engine wiring Defective Check (→ Page 174).
Engine Overload Contact Service.
82 | Troubleshooting | MS150047/02E 2012-03
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