Mercury Mountaineer (2010 year). Manual — part 16

TIRE PRESSURE MONITORING SYSTEM (TPMS)

Each tire, including the spare (if
provided), should be checked
monthly when cold and inflated to
the inflation pressure recommended
by the vehicle manufacturer on the
vehicle placard or tire inflation pressure label. (If your vehicle has tires
of a different size than the size indicated on the vehicle placard or tire
inflation pressure label, you should determine the proper tire inflation
pressure for those tires.)

As an added safety feature, your vehicle has been equipped with a tire
pressure monitoring system (TPMS) that illuminates a low tire pressure
telltale when one or more of your tires is significantly under-inflated.
Accordingly, when the low tire pressure telltale illuminates, you should
stop and check your tires as soon as possible, and inflate them to the
proper pressure. Driving on a significantly under-inflated tire causes the
tire to overheat and can lead to tire failure. Under-inflation also reduces
fuel efficiency and tire tread life, and may affect the vehicle’s handling
and stopping ability.

Please note that the TPMS is not a substitute for proper tire
maintenance, and it is the driver’s responsibility to maintain correct tire
pressure, even if under-inflation has not reached the level to trigger
illumination of the TPMS low tire pressure telltale.

Your vehicle has also been equipped with a TPMS malfunction indicator
to indicate when the system is not operating properly. The TPMS
malfunction indicator is combined with the low tire pressure telltale.
When the system detects a malfunction, the telltale will flash for
approximately one minute and then remain continuously illuminated.
This sequence will continue upon subsequent vehicle start-ups as long as
the malfunction exists.

When the malfunction indicator is illuminated, the system may not be
able to detect or signal low tire pressure as intended. TPMS malfunctions
may occur for a variety of reasons, including the installation of
replacement or alternate tires or wheels on the vehicle that prevent the
TPMS from functioning properly. Always check the TPMS malfunction
telltale after replacing one or more tires or wheels on your vehicle to
ensure that the replacement or alternate tires and wheels allow the
TPMS to continue to function properly.

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The Tire Pressure Monitoring System complies with part 15 of the FCC
rules and with RSS-210 of Industry Canada. Operation is subject to the
following two conditions: (1) This device may not cause harmful
interference, and (2) This device must accept any interference received,
including interference that may cause undesired operation.

WARNING: The Tire Pressure Monitoring System is NOT a
substitute for manually checking tire pressure. The tire pressure

should be checked periodically (at least monthly) using a tire gauge,
see Inflating your tires in this chapter. Failure to properly maintain
your tire pressure could increase the risk of tire failure, loss of control,
vehicle rollover and personal injury.

Changing tires with TPMS

Each road tire is equipped with
a tire pressure sensor fastened
to the inside rim of the wheel.
The pressure sensor is covered
by the tire and is not visible
unless the tire is removed. The
pressure sensor is located
opposite (180 degrees) from the
valve stem. Care must be taken
when changing the tire to avoid
damaging the sensor. It is
recommended that you always have
your tires serviced by an authorized
dealer.

The tire pressure should be checked
periodically (at least monthly) using
an accurate tire gauge, refer to
Inflating your tires in this chapter.

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Understanding your Tire Pressure Monitoring System (TPMS)

The Tire Pressure Monitoring System measures pressure in your four
road tires and sends the tire pressure readings to your vehicle. The Low
Tire Pressure Warning Lamp will turn ON if the tire pressure is
significantly low. Once the light is illuminated, your tires are under
inflated and need to be inflated to the manufacturer’s recommended tire
pressure. Even if the light turns ON and a short time later turns OFF,
your tire pressure still needs to be checked. Visit www.checkmytires.org
for additional information.

When your temporary spare tire is installed

When one of your road tires needs to be replaced with the temporary
spare, the TPMS system will continue to identify an issue to remind you
that the damaged road wheel/tire needs to be repaired and put back on
your vehicle.

To restore the full functionality of the Tire Pressure Monitoring System,
have the damaged road wheel/tire repaired and remounted on your
vehicle. For additional information, refer to Changing tires with TPMS
in this section.

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When you believe your system is not operating properly

The main function of the Tire Pressure Monitoring System is to warn you
when your tires need air. It can also warn you in the event the system is
no longer capable of functioning as intended. Please refer to the
following chart for information concerning your Tire Pressure Monitoring
System:

Low Tire Pressure
Warning Light

Possible cause Customer Action Required

Solid Warning Light

Tire(s)
under-inflated

1. Check your tire pressure to
ensure tires are properly
inflated; refer to Inflating
your tires in this chapter.
2. After inflating your tires to
the manufacturer’s
recommended inflation
pressure as shown on the Tire
Label (located on the edge of
driver’s door or the B-Pillar),
the vehicle must be driven for
at least two minutes over
20 mph (32 km/h) before the
light will turn OFF.

Spare tire in use Your temporary spare tire is in

use. Repair the damaged road
wheel/tire and reinstall it on
the vehicle to restore system
functionality. For a description
on how the system functions,
refer to When your temporary
spare tire is installed in this
section.

TPMS
malfunction

If your tires are properly
inflated and your spare tire is
not in use and the light
remains ON, contact your
authorized dealer as soon as
possible.

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Low Tire Pressure
Warning Light

Possible cause Customer Action Required

Flashing Warning
Light

Spare tire in use Your temporary spare tire is in

use. Repair the damaged road
wheel and re-mount it on the
vehicle to restore system
functionality. For a description
of how the system functions
under these conditions, refer to
When your temporary spare
tire is installed in this section.

TPMS
malfunction

If your tires are properly
inflated and your spare tire is
not in use and the TPMS
warning light still flashes,
contact your authorized dealer
as soon as possible.

When inflating your tires

When putting air into your tires (such as at a gas station or in your
garage), the Tire Pressure Monitoring System may not respond
immediately to the air added to your tires.

It may take up to two minutes of driving over 20 mph (32 km/h) for the
light to turn OFF after you have filled your tires to the recommended
inflation pressure.

How temperature affects your tire pressure

The Tire Pressure Monitoring System (TPMS) monitors tire pressure in
each pneumatic tire. While driving in a normal manner, a typical
passenger tire inflation pressure may increase approximately 2 to 4 psi
(14 to 28 kPa) from a cold start situation. If the vehicle is stationary
over night with the outside temperature significantly lower than the
daytime temperature, the tire pressure may decrease approximately 3 psi
(21 kPa) for a drop of 30°F (17°C) in ambient temperature. This lower
pressure value may be detected by the TPMS as being significantly lower
than the recommended inflation pressure and activate the TPMS warning
for low tire pressure. If the low tire pressure warning light is ON, visually
check each tire to verify that no tire is flat. (If one or more tires are flat,
repair as necessary.) Check air pressure in the road tires. If any tire is
under-inflated, carefully drive the vehicle to the nearest location where
air can be added to the tires. Inflate all the tires to the recommended
inflation pressure.

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SNOW TIRES AND CABLES

WARNING: Snow tires must be the same size, load index, speed
rating as those originally provided by Ford. The use of

non-recommended tires and wheels could cause steering, suspension,
axle or transfer case/power transfer unit failure. Using any tire or
wheel not recommended by Ford may increase the risk of loss of
vehicle control or vehicle rollover, which could result in personal injury
or death.

The tires on your vehicle have all-weather treads to provide traction in
rain and snow. However, in some climates, using snow tires or traction
devices may be necessary. Ford offers tire cables as a Ford approved
accessory and recommends use of these or SAE class “S” tire cables. See
your authorized dealer for more information on tire cables for your
vehicle.

Follow these guidelines when using snow tires and traction devices:
• Use only SAE Class S cables.
• Cables should only be used on the rear wheels.
• Do not use tire cables or optional traction devices on 17, 18 or 20 inch

wheels and tires.

• Install cables securely, verifying that the cables do not touch any

wiring, brake lines or fuel lines.

• Drive cautiously. If you hear the cables rub or bang against the

vehicle, stop and retighten them. If this does not work, remove the
cables to prevent vehicle damage.

• Avoid overloading your vehicle.
• Remove the cables when they are no longer needed.
• Do not use cables on dry roads.
• Do not exceed 30 mph (48 km/h) with tire cables on your vehicle.
Consult your authorized dealer for information on other Ford Motor
Company approved methods of traction control.

VEHICLE LOADING – WITH AND WITHOUT A TRAILER

This section will guide you in the proper loading of your vehicle and/or
trailer, to keep your loaded vehicle weight within its design rating
capability, with or without a trailer. Properly loading your vehicle will
provide maximum return of vehicle design performance. Before loading

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your vehicle, familiarize yourself with the following terms for determining
your vehicle’s weight ratings, with or without a trailer, from the vehicle’s
Tire Label or Safety Compliance Certification Label:

Base Curb Weight – is the weight of the vehicle including a full tank of
fuel and all standard equipment. It does not include passengers, cargo, or
optional equipment.

Vehicle Curb Weight – is the weight of your new vehicle when you
picked it up from your authorized dealer plus any aftermarket
equipment.

Payload – is the combined weight of cargo and passengers that the
vehicle is carrying. The maximum payload for your vehicle can be found
on the Tire Label on the B-Pillar or the edge of the driver’s door
(vehicles exported outside the US and Canada may not have a Tire
Label). Look for “THE COMBINED WEIGHT OF OCCUPANTS AND
CARGO SHOULD NEVER EXCEED XXX kg OR XXX lb.” for
maximum payload. The payload listed on the Tire Label is the maximum
payload for the vehicle as built by the assembly plant. If any aftermarket
or authorized-dealer installed equipment has been installed on the
vehicle, the weight of the equipment must be subtracted from the
payload listed on the Tire Label in order to determine the new payload.

WARNING: The appropriate loading capacity of your vehicle can
be limited either by volume capacity (how much space is

available) or by payload capacity (how much weight the vehicle should
carry). Once you have reached the maximum payload of your vehicle,
do not add more cargo, even if there is space available. Overloading or
improperly loading your vehicle can contribute to loss of vehicle
control and vehicle rollover.

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Example only:

Cargo Weight – includes all weight added to the Base Curb Weight,
including cargo and optional equipment. When towing, trailer tongue load
or king pin weight is also part of cargo weight.

GAW (Gross Axle Weight) – is the total weight placed on each axle
(front and rear) – including vehicle curb weight and all payload.

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GAWR (Gross Axle Weight Rating) – is the maximum allowable
weight that can be carried by a single axle (front or rear). These
numbers are shown on the Safety Compliance Certification Label
located on the B-Pillar or the edge of the driver’s door. The total
load on each axle must never exceed its GAWR.

Note: For trailer towing information refer to Trailer towing found in
this chapter or the RV and Trailer Towing Guide provided by your
authorized dealer.

GVW (Gross Vehicle Weight) – is the Vehicle Curb Weight + cargo +
passengers.

GVWR (Gross Vehicle Weight Rating) – is the maximum allowable
weight of the fully loaded vehicle (including all options, equipment,
passengers and cargo). The GVWR is shown on the Safety
Compliance Certification Label located on the B-Pillar or the
edge of the driver’s door. The GVW must never exceed the GVWR.

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• Example only:

WARNING: Exceeding the Safety Compliance Certification Label
vehicle weight rating limits could result in substandard vehicle

handling or performance, engine, transmission and/or structural
damage, serious damage to the vehicle, loss of control and personal
injury.

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GCW (Gross Combined Weight) – is the weight of the loaded vehicle
(GVW) plus the weight of the fully loaded trailer.

GCWR (Gross Combined Weight Rating) – is the maximum allowable
weight of the vehicle and the loaded trailer – including all cargo and
passengers – that the vehicle can handle without risking damage.
(Important: The towing vehicle’s braking system is rated for operation at
GVWR, not at GCWR.) Separate functional brakes should be used for
safe control of towed vehicles and for trailers where the GCW of the
towing vehicle plus the trailer exceed the GVWR of the towing vehicle.
The GCW must never exceed the GCWR.

Maximum Loaded Trailer Weight – is the highest possible weight of a
fully loaded trailer the vehicle can tow. It assumes a vehicle with only
mandatory options, no cargo (internal or external), a tongue load of
10–15% (conventional trailer) or king pin weight of 15–25% (fifth wheel
trailer), and driver only (150 lb. [68 kg]). Consult your authorized
dealer (or the RV and Trailer Towing Guide provided by your
authorized dealer) for more detailed information.

Tongue Load or Fifth Wheel King Pin Weight – refers to the amount
of the weight that a trailer pushes down on a trailer hitch.

Examples: For a 5,000 lb. (2,268 kg) conventional trailer, multiply 5,000
by 0.10 and 0.15 to obtain a proper tongue load range of 500 to 750 lb.
(227 to 340 kg). For an 11,500 lb. (5,216 kg) fifth wheel trailer, multiply
by 0.15 and 0.25 to obtain a proper king pin load range of 1,725 to
2,875 lb. (782 to 1,304 kg)

WARNING: Do not exceed the GVWR or the GAWR specified on
the Safety Compliance Certification Label.

WARNING: Do not use replacement tires with lower load
carrying capacities than the original tires because they may

lower the vehicle’s GVWR and GAWR limitations. Replacement tires
with a higher limit than the original tires do not increase the GVWR
and GAWR limitations.

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WARNING: Exceeding any vehicle weight rating limitation could
result in serious damage to the vehicle and/or personal injury.

Steps for determining the correct load limit:

1. Locate the statement “The combined weight of occupants and cargo
should never exceed XXX kg or XXX lb.” on your vehicle’s placard.

2. Determine the combined weight of the driver and passengers that will
be riding in your vehicle.

3. Subtract the combined weight of the driver and passengers from XXX
kg or XXX lb.

4. The resulting figure equals the available amount of cargo and luggage
load capacity. For example, if the “XXX” amount equals 1,400 lb. and
there will be five 150 lb. passengers in your vehicle, the amount of
available cargo and luggage load capacity is 650 lb. (1400-750 (5 x 150)
= 650 lb.). In metric units (635-340 (5 x 68) = 295 kg.)

5. Determine the combined weight of luggage and cargo being loaded on
the vehicle. That weight may not safely exceed the available cargo and
luggage load capacity calculated in Step 4.

6. If your vehicle will be towing a trailer, load from your trailer will be
transferred to your vehicle. Consult this manual to determine how this
reduces the available cargo and luggage load capacity of your vehicle.

The following gives you a few examples on how to calculate the available
amount of cargo and luggage load capacity:
• Another example for your vehicle with 1,400 lb. (635 kg) of cargo and

luggage capacity. You decide to go golfing. Is there enough load
capacity to carry you, 4 of your friends and all the golf bags? You and
four friends average 220 lb. (99 kg) each and the golf bags weigh
approximately 30 lb. (13.5 kg) each. The calculation would be: 1400 -
(5 x 220) - (5 x 30) = 1400 - 1100 - 150 = 150 lb. Yes, you have
enough load capacity in your vehicle to transport four friends and
your golf bags. In metric units, the calculation would be: 635 kg - (5 x
99 kg) - (5 x 13.5 kg) = 635 - 495 - 67.5 = 72.5 kg.

• A final example for your vehicle with 1,400 lb. (635 kg) of cargo and

luggage capacity. You and one of your friends decide to pick up
cement from the local home improvement store to finish that patio
you have been planning for the past 2 years. Measuring the inside of
the vehicle with the rear seat folded down, you have room for
12-100 lb. (45 kg) bags of cement. Do you have enough load capacity

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to transport the cement to your home? If you and your friend each
weigh 220 lb. (99 kg), the calculation would be: 1400 - (2 x 220) - (12
x 100) = 1400 - 440 - 1200 = - 240 lb. No, you do not have enough
cargo capacity to carry that much weight. In metric units, the
calculation would be: 635 kg - (2 x 99 kg) - (12 x 45 kg) = 635 - 198 -
540 = -103 kg. You will need to reduce the load weight by at least
240 lb. (104 kg). If you remove 3-100 lb. (45 kg) cement bags, then
the load calculation would be:

1400 - (2 x 220) - (9 x 100) = 1400 - 440 - 900 = 60 lb. Now you have
the load capacity to transport the cement and your friend home. In
metric units, the calculation would be: 635 kg - (2 x 99 kg) - (9 x
45 kg) = 635 - 198 - 405 = 32 kg.

The above calculations also assume that the loads are positioned in your
vehicle in a manner that does not overload the Front or the Rear Gross
Axle Weight Rating specified for your vehicle on the Safety Compliance
Certification Label found on the edge of the driver’s door.

Special loading instructions for owners of pickup trucks and
utility-type vehicles

WARNING: For important information regarding safe operation
of this type of vehicle, see the Preparing to drive your vehicle

section in the Driving chapter of this owner’s guide.

WARNING: Loaded vehicles may handle differently than
unloaded vehicles. Extra precautions, such as slower speeds and

increased stopping distance, should be taken when driving a heavily
loaded vehicle.

Your vehicle can haul more cargo and people than most passenger cars.
Depending upon the type and placement of the load, hauling cargo and
people may raise the center of gravity of the vehicle.

Calculating the load your vehicle can carry/tow

1. Use the appropriate maximum GCWR chart (in the Trailer towing
section in this chapter) for your type of engine and rear axle ratio.

2. Weigh your vehicle without cargo. To obtain correct weights, take your
vehicle to a shipping company or an inspection station for trucks.

3. Subtract your loaded weight from the maximum GCWR in the chart.
This is the maximum trailer weight your vehicle can tow. It must be
below the maximum trailer weight shown in the chart.

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TRAILER TOWING

Trailer towing with your vehicle may require the use of a trailer tow
option package.

Trailer towing puts additional loads on your vehicle’s engine,
transmission, axle, brakes, tires, and suspension. For your safety and to
maximize vehicle performance, be sure to use the proper equipment
while towing.

Follow these guidelines to ensure safe towing procedure:
• Do not tow a trailer until your vehicle has been driven at least

1,000 miles (1,600 km).

• Stay within your vehicle’s load limits.
• Thoroughly prepare your vehicle for towing. Refer to Preparing to

tow in this chapter.

• Use extra caution when driving while trailer towing. Refer to Driving

while you tow in this chapter.

• Service your vehicle more frequently if you tow a trailer. Refer to the

severe duty schedule in the scheduled maintenance guide.

• Refer to the instructions included with towing accessories for the

proper installation and adjustment specifications.

Do not exceed the maximum loads listed on the Safety Compliance
Certification label. For load specification terms found on the label, refer
to Vehicle loading in this chapter when figuring the total weight of your
vehicle.

Your vehicle is equipped with a standard Class II integrated hitch and
requires only a draw bar and ball with a 3/4 inch (19 mm) shank
diameter. An optional Class III/Class IV hitch is also available.

Note: Do not exceed the GVWR or the GAWR specified on the Safety
Compliance Certification Label.

WARNING: Towing trailers beyond the maximum recommended
gross trailer weight exceeds the limit of the vehicle and could

result in engine damage, transmission damage, structural damage, loss
of vehicle control, vehicle rollover and personal injury.

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4x2

GCWR (Gross Combined Weight Rating)/Trailer Weight

Engine

Rear axle ratio

Maximum

GCWR-lb. (kg)

Trailer weight
range-lb. (kg)
(0-Maximum)

4.0L SOHC Class
II towing

3.55

8500 (3856)

0–3500 (0–1588)

4.6L* Class II
towing

3.55

8500 (3856)

0–3500 (0–1588)

4.0L SOHC Class
III/IV Towing

3.73

10000 (4536)

0–5305 (0–2406)

4.6L* Class III/IV
Towing

3.55

12000 (5443)

0–7215 (0–3273)

Notes: - For high altitude operation, reduce GCW by 2% per 1,000 ft.
(300 meters) elevation. For definitions of terms used in this table and
instructions on how to calculate your vehicle load, refer to Vehicle
loading in this chapter. Maximum trailer weights shown. The combined
weight of the completed towing vehicle and the loaded trailer must not
exceed the GCWR.

* -When towing maximum loads under high outside temperatures and
on steep grades, the A/C system may cycle on and off to protect the
engine from overheating. This may result in a temporary increase of
interior temperatures.

AWD

GCWR (Gross Combined Weight Rating)/Trailer Weight

Engine

Rear axle ratio

Maximum

GCWR-lb. (kg)

Trailer weight
range-lb. (kg)
(0-Maximum)

4.0L SOHC Class
II towing

3.55

8500 (3856)

0–3500 (0–1588)

4.6L* Class II
towing

3.55

8500 (3856)

0–3500 (0–1588)

4.0L SOHC Class
III/IV Towing

3.73

10000 (4536)

0–5000 (0–2268)

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AWD

GCWR (Gross Combined Weight Rating)/Trailer Weight

Engine

Rear axle ratio

Maximum

GCWR-lb. (kg)

Trailer weight
range-lb. (kg)
(0-Maximum)

4.6L* Class III/IV
Towing

3.55

12000 (5443)

0–7040 (0–3193)

Notes: - For high altitude operation, reduce GCW by 2% per 1,000 ft.
(300 meters) elevation. For definitions of terms used in this table and
instructions on how to calculate your vehicle load, refer to Vehicle
loading in this chapter. Maximum trailer weights shown. The combined
weight of the completed towing vehicle and the loaded trailer must not
exceed the GCWR.

* -When towing maximum loads under high outside temperatures and
on steep grades, the A/C system may cycle on and off to protect the
engine from overheating. This may result in a temporary increase of
interior temperatures.

Preparing to tow

Use the proper equipment for towing a trailer and make sure it is
properly attached to your vehicle. Contact your authorized dealer or a
reliable trailer dealer as soon as possible if you require assistance.

Hitches

Do not use hitches that clamp onto the vehicle bumper. Use a load
carrying hitch. You must distribute the load in your trailer so that
10–15% of the total weight of the trailer is on the tongue, not to exceed
the maximum tongue loads as stated:
• Class II receiver: 350 lb. (159 kg)
• Class III/IV receiver: 500 lb. (227 kg) (weight carrying); 740 lb.

(336 kg) (weight distributing)

Safety chains

Always connect the trailer’s safety chains to the frame or hook retainers
of the vehicle hitch. To connect the trailer’s safety chains, cross the
chains under the trailer tongue and allow slack for turning corners.

If you use a rental trailer, follow the instructions that the rental agency
gives to you.

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