6 Troubleshooting
6.1 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 if cable connections are proper‐
ly secured (see manufacturer's docu‐
mentation).
Starter Engine wiring or starter defective Check if cable connections are proper‐
ly secured, contact Service.
Engine wiring Defective Check (→ Page 145).
LOP Secure seating of assemblies or con‐
nectors not provided
Perform visual inspection
(→ Page 154).
ECU Plug-in connections are loose Check plug-in connections
(→ Page 149).
Engine Running gear blocked (engine cannot
be barred manually)
Contact Service.
Start-interlock limit
switch
Limit switch not installed Check limit switch (→ Page 148).
Limit switch defective
Wiring defective Check wiring (→ Page 145).
Engine turns 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 145).
Fuel system Not vented Vent fuel system (→ Page 102).
ECU Defective Contact Service.
Engine fires unevenly
Component Probable Cause Task
Fuel injection equip‐
ment
Injector defective Replace (→ Page 94).
Injection pump defective Replace (→ Page 91).
Engine wiring Defective Check (→ Page 145).
Fuel system Not vented Vent fuel system (→ Page 102).
ECU Defective Contact Service.
MW15407/14E 2012-02 | Troubleshooting | 67
TIM-ID: 0000002556 - 002
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