2021 FORD F650/750 check engine

Fuses
Fuse Specification Chart
..........................193
Changing a Fuse ..........................................
201
Vehicle Inspection Guide
Vehicle Inspection Information .............
203
Maintenance
General Information ....................................
212
Opening and Closing the Hood ..............
213
Under Hood Overview - 6.7L Diesel ......
215
Under Hood Overview - 7.3L ....................
216
Engine Oil Dipstick - 7.3L ...........................
217
Engine Oil Dipstick - 6.7L Diesel .............
217
Engine Oil Check - 7.3L ...............................
217
Engine Oil Check - 6.7L Diesel ................
218
Changing the Engine Oil and Oil Filter ........................................................................\
.
219
Oil Change Indicator Reset .....................
220
Changing the Engine Air Filter - 6.7L Diesel ............................................................
221
Changing the Engine Air Filter - 7.3L .....
223
Draining the Fuel Filter Water Trap - 6.7L Diesel ...........................................................
225
Engine Coolant Check - 7.3L ...................
226
Engine Coolant Check - 6.7L Diesel ......
231
Automatic Transmission Fluid Check ........................................................................\
236
Brake Fluid Check ........................................
237
Power Steering Fluid Check ....................
238
Changing the 12V Battery ........................
239
Adjusting the Headlamps .......................
240
Washer Fluid Check ...................................
242
Fuel Filter - 7.3L ............................................
242
Checking the Wiper Blades .....................
242
Changing the Wiper Blades ....................
242
Removing a Headlamp .............................
243
Changing a Bulb ..........................................
243Changing the Engine-Mounted and
Diesel Fuel Conditioner Module Fuel
Filters - 6.7L Diesel .................................
244
Electrical System Inspection ..................
247
Air Induction System Inspection ...........
247
Exhaust System Inspection ....................
248
Brake System Inspection .........................
248
Axle Inspection .............................................
251
Steering System Inspection ....................
252
Suspension System Inspection .............
252
Frame and Tow Hook Inspection ..........
253
Rear Axle Fluid Check ................................
253
Spring U-Bolt Check ..................................
253
Vehicle Care
General Information ..................................
255
Cleaning Products ......................................
255
Cleaning the Exterior .................................
256
Waxing .............................................................
257
Cleaning the Engine ...................................
257
Cleaning the Windows and Wiper Blades ........................................................................\
257
Cleaning the Interior ..................................
258
Cleaning the Instrument Panel and Instrument Cluster Lens ......................
258
Repairing Minor Paint Damage .............
259
Cleaning the Wheels .................................
259
Vehicle Storage ...........................................
260
Wheels and Tires
Tire Care .........................................................
262
Using Snow Chains .....................................
277
Changing a Road Wheel ...........................
277
Technical Specifications ..........................
279
Capacities and Specifications
Engine Specifications - 6.7L Diesel .......
281
Engine Specifications - 7.3L ....................
282
Motorcraft Parts - 6.7L Diesel ................
283
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F650750 (TBC) , enUSA, Edition date: 202010, Second-Printing Table of Contents

If these modified engine performance
characteristics persist for an extended
period and either the service engine soon
or powertrain malfunction, reduced power,
electronic throttle control light is
illuminated, have the system checked by
an authorized dealer.
Service engine soon
Powertrain malfunction, reduced
power, electronic throttle control
Diesel Lubrication System
It is important to change the engine oil at
the recommended service intervals or
when indicated by the information display
to maintain oil viscosity. Extending the oil
and filter change interval beyond the
recommended interval can negatively
affect engine performance, fuel economy
and engine life. See Engine Oil Check
(page 218).
Engine and secondary cooling system
The cooling system contains a primary
cooling loop to cool the engine and a
secondary cooling loop to cool the
transmission, 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. You can find more
information about coolant additives and
coolant change intervals in the coolant
chapter. See
General Maintenance
Information (page 319). Operating the
engine with insufficient coolant or coolant
additive can cause severe engine damage. Selective catalytic reduction system
Your vehicle is equipped with a selective
catalytic reduction system designed to
reduce emission levels of nitrogen oxides
from the exhaust of your diesel engine. This
system relies on the use of Diesel Exhaust
Fluid (DEF) that you must replenish at
certain intervals. Failure to maintain proper
DEF levels or if the DEF becomes
contaminated will result in vehicle speed
limitations or result in your vehicle entering
an idle-only mode. See
Selective
Catalytic Reductant System (page 112).
Minor Troubleshooting Guide
If the engine won ’t crank WARNING:
Battery posts,
terminals and related accessories
contain lead and lead compounds. Wash
hands after handling.
Turn on the headlights. If the lights are dim,
do not go on at all or when the ignition is
turned to the start position, the lights
become dim or go out, the battery
connections may be loose or corroded, or
the battery may be discharged. If there is
a clicking or stuttering sound coming from
the engine compartment when you turn
the key to the start position, this may also
indicate a loose or corroded battery
connection.
Check the battery connections at the
battery posts, cable connection to the
engine grounding point and at the starter
connection.
If you suspect a discharged battery, have
it checked and corrected.
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F650750 (TBC) , enUSA, Edition date: 202010, Second-Printing Introduction

•
The gearshift lever must be in P (Park)
or N (Neutral) in order for the starter
to operate.
• Try operating the starter switch several
times. This operation may clean
potentially corroded contacts or make
the switch temporarily operable until
you can reach the dealer.
• If all electrical connections are tight
and you need assistance to start, See
Jump Starting the Vehicle (page 183).
If engine cranks but won ’t start
Prolonged starter cranking (in excess of 10
seconds) could cause damage to the
starter motor or the high-pressure fuel
pump.
• Check the fuel gauge. You may be out
of fuel. If the gauge shows that there
is fuel in the tank, the trouble may be
in the electrical system or the fuel
system. If equipped with an auxiliary
tank, be sure that the tank control
switch is set for the tank with fuel and
not on an empty tank.
• Leaving your ignition key turned to on
for over two minutes without starting
may make starting difficult because
the glow plugs will cease activation.
Reset the system by turning the ignition
key to off and then back to on again.
Note: If the system is out of fuel and the
engine will not start, do not continue
cranking the engine. Continued cranking can
damage the high-pressure fuel pump.
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. See
Changing a Fuse
(page 201).
Selective catalytic reduction system
speed limit and Idle-only modes
If the vehicle ’s speed is limited or in an
idle-only mode, the selective catalytic
reduction system may be limiting the
vehicle ’s functions due to low or
contaminated DEF. Check the DEF. See
Selective Catalytic Reductant System
(page
112).
SYMBOLS GLOSSARY
These are some of the symbols you may
see on your vehicle.
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F650750 (TBC) , enUSA, Edition date: 202010, Second-Printing Introduction

Air conditioning system
Air conditioning system lubricant
type
Anti-lock braking system
Avoid smoking, flames or sparks
Battery
Battery acid
Brake fluid - non petroleum
based
Brake system
Brake system
Cabin air filter
Check fuel cap
Child safety door lock or unlock
Child seat lower anchor
Child seat tether anchor
Cruise control Do not open when hot
Engine air filter
Engine coolant
Engine coolant temperature
Engine oil
Explosive gas
Fan warning
Fasten seatbelt
Flammable
Front airbag
Front fog lamps
Fuel pump reset
Fuse compartment
Hazard flashers
Heated rear window
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F650750 (TBC) , enUSA, Edition date: 202010, Second-Printing IntroductionE162384 E231157 E270480 E71340 E71880 E231160 E67017

PROTECTING THE
ENVIRONMENT
You should play your part in protecting the
environment. Correct vehicle usage and
the authorized disposal of waste, cleaning
and lubrication materials are significant
steps toward this aim.
For additional information about our
sustainability progress and initiatives, visit
www
.sus t ainabilit y .f or d . c om .
NOISE POLLUTION CONTROL
In order to keep to the federal exterior
noise regulations, your vehicle may be
equipped with noise emission items.
Depending on your vehicle configuration,
it may have all or some of the following
items:
Air Intake System
Inspect the air cleaner. Do not alter its
location. Do not alter inlet and outlet
piping.
Body
Inspect wheel well splash shields, cab
shields and under hood insulation for
deterioration, dislocation and orientation.
Cooling System
• Inspect the fan for blade damage. If
you find any damage, replace with the
recommended parts. Inspect for
fan-to-shroud interference and any
damage to shroud, such as cracks and
holes.
• Do not change fan ratio or alter fan
spacer dimensions and positions. •
Inspect fan clutch for proper operation.
Make sure the fan is disengaged when
cooling of the engine is not required.
• Inspect radiator shutters (if equipped)
for proper operation. The shutters
should be open during normal
operating temperatures.
Engine
Valve covers and block covers damp-out
engine mechanical noise. If they need
replacing, make sure to replace them with
the recommended parts. Check for
mechanical isolations.
Transmission Enclosure
Inspect for cracks, holes and tears. Clean
any deposits, such as oil, dirt and stones.
Exhaust System
• Inspect for leaks at various joint
connections and loose clamps.
• Perform a visual inspection for cracks
or holes in the muffler and tail pipe.
• Always use the recommended
replacement parts.
• Do not change the tail pipe elbow or
offset tail pipe orientation from the
standard position as originally received.
• To avoid abnormal changes in vehicle
sound levels, it is necessary for the
owner to perform inspections and
necessary maintenance at specified
intervals. See Scheduled
Maintenance (page 319).
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F650750 (TBC) , enUSA, Edition date: 202010, Second-Printing Environment

Engine Oil Pressure Gauge
Indicates engine oil pressure. At normal
operating temperature, the level indicator
is in the normal range. If the pressure gauge
falls below the normal range, stop your
vehicle, switch off the engine and check
the engine oil level. Add oil if needed. If the
oil level is correct, have your vehicle
checked by an authorized dealer.
Engine Coolant Temperature
Gauge
WARNING: Do not remove the
coolant reservoir cap when the engine is
on or the cooling system is hot. Wait 10
minutes for the cooling system to cool
down. Cover the coolant reservoir cap
with a thick cloth to prevent the
possibility of scalding and slowly remove
the cap. Failure to follow this instruction
could result in personal injury.
Indicates engine coolant temperature. At
normal operating temperature, the level
indicator is in the normal range. If the
engine coolant temperature exceeds the
normal range, stop your vehicle as soon as
possible, switch off the engine and let the
engine cool.
Fuel Gauge
The fuel gauge indicates about how much
fuel is in the fuel tank.
The arrow adjacent to the fuel pump
symbol indicates on which side of your
vehicle the fuel filler door is located.
Note: The fuel gauge may vary slightly
when your vehicle is moving or on a slope. Low Fuel Reminder
A low fuel level reminder displays and
sounds when the distance to empty
reaches
75 mi (120 km) to empty for
MyKey, and at 50 mi (80 km), 25 mi
(40 km), 10 mi (20 km) and 0 mi (0 km)
for all vehicle keys.
Note: The low fuel reminder can appear at
different fuel gauge positions depending on
fuel economy conditions. This variation is
normal.
Distance to Empty
Indicates the approximate distance your
vehicle can travel on the fuel remaining in
the tank. Changes in driving pattern can
cause the value to not only decrease but
also increase or stay constant for periods
of time.
Configurable Gauge
Transmission Fluid Temperature Gauge
Indicates transmission fluid temperature.
At normal operating temperature, the level
indicator is in the normal range. If the
transmission fluid temperature exceeds
the normal range, stop your vehicle as soon
as possible and verify the airflow is not
restricted by snow or debris blocking
airflow through the grille.
Special operating conditions such as
snowplowing, towing, or off-road use may
cause higher than normal operating
temperatures. See
Special Operating
Conditions Scheduled Maintenance
(page
329).
To lower the transmission temperature
into the normal range, alter the severity of
your driving conditions. Operating the
transmission for extended periods with the
gauge in the higher than normal area may
cause internal transmission damage. If the
gauge continues to show high
temperatures, see an authorized dealer.
65
F650750 (TBC) , enUSA, Edition date: 202010, Second-Printing Instrument Cluster

Door Ajar
Displays when the ignition is on
and any door is not completely
closed.
Electronic Locking Differential (If
Equipped) Illuminates when using the
electronic locking differential.
Engine Coolant Temperature If it illuminates when your vehicle
is moving, this indicates that the
engine is overheating. Stop your
vehicle as soon as it is safe to do so and
switch the engine off. Have your vehicle
checked as soon as possible. See Engine
Coolant Check
(page 226). idk
Engine Oil Pressure If it illuminates with the engine
running, or when you are driving,
this indicates a malfunction.
Stop your vehicle as soon as it is safe to
do so and switch off the engine. Check the
engine oil level.
Note: Do not resume your journey if it
illuminates despite the level being correct.
Have the system checked as soon as
possible.
Exhaust Brake On
(If Equipped) The exhaust brake indicator light
illuminates when you switch the
exhaust brake on.
Fasten Seatbelt Illuminates and a tone sounds
to remind you to fasten your
seatbelt. High Beam Illuminates when you switch on
the high beam headlamps. It
flashes when you use the
headlamp flasher.
Hydromax Illuminates to indicate normal
hydromax booster reserve
system activation when the
engine is off and the service brake pedal is
applied. This light may also illuminate
momentarily if the engine is running and
the driver turns the steering wheel fully in
one direction while braking. If the light
remains on while the engine is running, this
indicates inadequate hydraulic booster
pressure or reserve pump system failure.
Stop the vehicle as soon as possible and
seek service immediately by your
authorized dealer.
Parking Lamps Illuminates when you switch the
parking lamps on.
Low Fuel Level
(If Equipped) Illuminates when the fuel level
is low or the fuel tank is nearly
empty. Refuel as soon as
possible.
Parking Brake Warning Illuminates briefly when you
switch the ignition to the on
position, with the engine off. It
also illuminates when you apply the
parking brake. If the park brake lamp does
not illuminate at these times, seek service
immediately. Vehicles with the power
parking brake option: If the park brake
warning lamp begins to blink after setting
67
F650750 (TBC) , enUSA, Edition date: 202010, Second-Printing Instrument Cluster E163170 E171217 E71880 E146190 E208810

the parking brake, this may indicate a
failure in the parking brake system. Have
the system checked as soon as possible.
Driving extended distances with the
parking brake engaged can cause brake
failure and the risk of personal injury.
Parking Lamps
Illuminates when you switch the
low beam headlamps or the
parking lamps on.
Powertrain Malfunction/Reduced
Power/Electronic Throttle Control
(If Equipped) Illuminates in the event of a
powertrain fault. Contact an
authorized dealer as soon as
possible.
Service Engine Soon If it illuminates when the engine
is running, the on board
diagnostics system notifies you
that the emission control system requires
service.
If it flashes, engine misfire may be
occurring. Increased exhaust gas
temperatures could damage the catalytic
converter or other vehicle components.
Avoid heavy acceleration and deceleration
and have your vehicle serviced
immediately.
It illuminates when you switch the ignition
on prior to engine start to check the bulb
and to indicate whether your vehicle is
ready for Inspection and Maintenance
(I/M) testing. Normally, it illuminates until the engine is
cranked and automatically turns off if no
malfunctions are present. However, if after
15 seconds it flashes eight times, this
indicates that your vehicle is not ready for
Inspection and Maintenance (I/M) testing.
See Catalytic Converter (page 110).
Stability Control Indicator (If Equipped) Flashes during operation.
If it does not illuminate when you switch
the ignition on, or remains on when the
engine is running, this indicates a
malfunction. Have your vehicle checked
as soon as possible.
Traction Control Indicator It flashes during a traction
control event.
If it does not illuminate when you switch
the ignition on, or remains on when the
engine is running, this indicates a
malfunction. Have your vehicle checked
as soon as possible.
Traction Control System Off Illuminates when you switch the
system off.
Trailer Anti-Lock Brake System
(ABS) Illuminates briefly when you
switch on the ignition, and only
when a PLC trailer or a PLC
diagnostic tool is connected. If the light
fails to illuminate, remains on after you
start the vehicle or continues to flash, have
the system serviced immediately.
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F650750 (TBC) , enUSA, Edition date: 202010, Second-Printing Instrument Cluster E138639 E138639 E194301 E209040