2012 Ford F550 Cab Diesel Supplement 3rd Printing - Page 5

2012 Ford F550 Cab Manual

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Introduction The glow plug system is electronically controlled by the PCM and GPCM. The GPCM energizes the glow plugs immediately after the ignition is turned on and kept on as determined by the GPCM using the ECT, BARO and environmental temperature sensor. The required time for the glow plugs to be energized decreases as the coolant temperature, barometric pressure and environmental temperature increase. Engine and secondary cooling system The cooling system contains an engine cooling loop to cool the engine and a secondary cooling loop to cool the transmission, exhaust gas recirculation (EGR), charge air and fuel. The coolant serves three primary purposes: to provide heat transfer, freeze point protection, and corrosion protection using additives. Vehicles with diesel engines typically are used to carry heavy loads and accumulate mileage rapidly. These two factors may cause the additives in the coolant to "wear out" in a shorter time. Refer to the Special operating conditions section for more information about coolant additives and coolant change intervals. Operating the engine with insufficient coolant and/or coolant additive can cause severe engine damage. Selective catalytic reduction (SCR) system Your vehicle is equipped with a selective catalytic reduction (SCR) system to help reduce emission levels of oxides of nitrogen from the exhaust of the diesel engine. This system relies on the use of diesel exhaust fluid (DEF) which must be replenished at certain intervals. Failure to maintain proper DEF levels or if the DEF becomes contaminated will result in vehicle speed limitations and/or result in the vehicle entering an idle-only mode. See Selective catalytic reduction (SCR) system in the Maintenance and Specifications chapter for more information. Speed control (if equipped) If vehicle speed goes outside a predetermined range from the set speed, the RES (Resume) function will not reset vehicle speed. Vehicle speed will need to be reset with the SET +/- button after reaching desired speed using accelerator pedal. 5 2012 Diesel (67l) Supplement, 3rd Printing USA (fus)

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The glow plug system is
electronically controlled by the PCM
and GPCM. The GPCM energizes the
glow plugs immediately after the
ignition is turned on and kept on as determined by the GPCM using the
ECT, BARO and environmental temperature sensor. The required time
for the glow plugs to be energized decreases as the coolant temperature,
barometric pressure and environmental temperature increase.
Engine and secondary cooling system
The cooling system contains an engine cooling loop to cool the engine
and a secondary cooling loop to cool the transmission, exhaust gas
recirculation (EGR), charge air and fuel. The coolant serves three
primary purposes: to provide heat transfer, freeze point protection, and
corrosion protection using additives.
Vehicles with diesel engines typically are used to carry heavy loads and
accumulate mileage rapidly. These two factors may cause the additives in
the coolant to “wear out” in a shorter time. Refer to the
Special
operating conditions
section for more information about coolant
additives and coolant change intervals. Operating the engine with
insufficient coolant and/or coolant additive can cause severe engine
damage.
Selective catalytic reduction (SCR) system
Your vehicle is equipped with a selective catalytic reduction (SCR)
system to help reduce emission levels of oxides of nitrogen from the
exhaust of the diesel engine. This system relies on the use of diesel
exhaust fluid (DEF) which must be replenished at certain intervals.
Failure to maintain proper DEF levels or if the DEF becomes
contaminated will result in vehicle speed limitations and/or result in the
vehicle entering an idle-only mode. See
Selective catalytic reduction
(SCR) system
in the
Maintenance and Specifications
chapter for more
information.
Speed control (if equipped)
If vehicle speed goes outside a predetermined range from the set speed,
the RES (Resume) function will not reset vehicle speed. Vehicle speed
will need to be reset with the SET +/- button after reaching desired
speed using accelerator pedal.
Introduction
5
2012 Diesel
(67l)
Supplement, 3rd Printing
USA
(fus)