If the engine runs hot
The following could cause the engine to overheat:
•Lack of coolant.
•Dirty cooling system.
•Plugged radiator fins, A/C condenser and/or oil cooler.
•Malfunctioning fan drive.
•Driving with frozen coolant.
•Sticking thermostat.
•Overloading or pulling heavy trailers during hot weather.
•Grill or radiator air blockage.
•Slipping or missing drive belt.
•Plugged or very dirty air filter.
If fuses burn out
WARNING:Replacement fuses and circuit breakers must always
be the same rating as the original equipment shown. Never
replace a fuse or circuit breaker with one of a higher rating. Higher
rated fuses or circuit breakers could allow circuit overloading in the
event of a circuit malfunction, resulting in severe vehicle damage or
personal injury due to fire.
Burned-out or blown fuses usually indicate an electrical short-circuit,
although a fuse may occasionally burn out from vibration. Insert a second
fuse. If this fuse immediately burns out and you cannot locate the cause,
return your vehicle to your dealer for a circuit check.
Refer to theOwner’s Manualfor replacement of fuses.
Selective catalytic reduction (SCR) system speed limit and
Idle-only modes
If the vehicle’s speed is limited or in an idle-only mode, the SCR system
may be limiting the vehicle’s functions due to low or contaminated diesel
exhaust fluid (DEF). Check the DEF. SeeSelective catalytic reduction
(SCR) systemin theFuel and Refuelingchapter for more information.
Maintenance
63
2013 Diesel(67l)
Supplement, 1st Printing
USA(fus)
