6 Troubleshooting
6.1 Troubleshooting
Engine does not turn when starter is actuated
Component Cause Action
Battery Low or faulty Charge or replace (see manufacturer's
documentation).
Cable connections faulty Check if cable connections are proper‐
ly secured (see manufacturer's docu‐
mentation).
Starter Engine cabling or starter faulty Check cable connections for secure
seating ; Contact Service.
Engine wiring Faulty Check (→ Page 62).
Engine Control Unit Plug-in connections possibly loose Check plug-in connections
(→ Page 64).
Engine Running gear blocked (engine cannot
be barred manually)
Contact Service.
Table 2: Engine does not turn when starter is actuated
Engine turns but does not fire
Component Cause Action
Starter Poor rotation by starter: Battery low or
faulty
Charge or replace battery (see manu‐
facturer's documentation).
Engine wiring Faulty Check (→ Page 64).
Fuel system Air in fuel system, if fault occurs after
filling the system
Vent fuel system (→ Page 41).
Engine Control Unit Faulty Contact Service.
Table 3: Engine turns but does not fire
Engine fires unevenly
Component Cause Action
Fuel injection equip‐
ment
Injector faulty Contact Service.
Engine wiring Faulty Check (→ Page 62).
Fuel system Air in fuel system, if fault occurs after
filling the system
Vent fuel system (→ Page 41).
Engine Control Unit Faulty Contact Service.
Table 4: Engine fires unevenly
34 | Troubleshooting | MS15025/00E 2011-12
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