6 Troubleshooting
6.1 Troubleshooting
Engine does not turn over when starter is operated
Component
Cause
Action
Battery
Discharged or defective
Charge or replace (see manufacturer's
documentation).
Cable connections defective
Check if cable connections are properly
secured (see manufacturer's documen-
tation).
Starter
Engine wiring or starter faulty
Check if cable connections are properly
secured, contact Service.
Engine wiring
Faulty
Check (→ Page 149).
Engine/alternator
control system
Assemblies or connectors possibly loose Perform visual inspection (see manufac-
turer's documentation).
Engine Control Unit
Electrical connections may be loose
Check electrical connections
(→ Page 151).
Engine
Jammed (cannot be cranked by hand)
Notify Service.
Engine turns over when started but does not fire
Component
Cause
Action
Starter
Lacks power: battery discharged or de-
fective
Charge or replace battery (see manufac-
turer's documentation).
Engine wiring
Faulty
Check (→ Page 149).
Fuel system
Air in fuel system
Bleed fuel system (→ Page 103).
Engine Control Unit
Faulty
Notify Service.
Engine fires unevenly
Component
Cause
Action
Fuel injection system
Injector defective
Replace (→ Page 97).
Engine wiring
Faulty
Check (→ Page 149).
Fuel system
Air in fuel system
Bleed fuel system (→ Page 103).
Engine Control Unit
Faulty
Notify Service.
Engine fails to reach rated speed
Component
Cause
Action
Fuel supply
Fuel prefilter clogged
Replace
Fuel filter clogged
Replace (→ Page 104).
Air supply
Air filter clogged
Clean.
Fuel injection system
Injector defective
Replace (→ Page 97).
Engine wiring
Faulty
Check (→ Page 149).
Engine
Overloaded
Notify Service.
56 | Troubleshooting | M015695/03E 2013-03
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