6.2 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 wiring or starter faulty Check if cable connections are proper‐
ly secured, contact Service.
Engine cabling Faulty Check (→ Page 133).
ECU Plug-in connections possibly loose Check plug connections for secure
seating.
Engine Running gear blocked (engine cannot
be barred manually)
Contact Service.
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 cabling Faulty Check (→ Page 133).
Fuel system Air in fuel system Vent fuel system (→ Page 91)
ECU Faulty Contact Service.
Engine fires unevenly
Component Cause Action
Fuel injection equip‐
ment
Injector faulty Replace (→ Page 88).
Engine cabling Faulty Check (→ Page 133).
Fuel system Air in fuel system Vent fuel system (→ Page 91)
ECU Faulty Contact Service.
Engine does not reach rated speed
Component Cause Action
Fuel supply Fuel prefilter clogged Replace (→ Page 98).
Fuel filter clogged Replace (→ Page 92).
Air supply Air filter clogged Check signal ring position of service in‐
dicator (→ Page 103).
Fuel injection equip‐
ment
Injector faulty Replace (→ Page 88).
Engine cabling Faulty Check (→ Page 133).
Engine Overloaded Contact Service.
MS150061/04E 2012-07 | Troubleshooting | 65
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