2009 Mercury Mariner Hybrid battery

6. Drive the vehicle to complete the relearning process.
•The vehicle may need to be driven 10 miles (16 km) or more to
relearn the idle and fuel trim strategy.
•If you do not allow the engine to relearn its idle trim, the idle
quality of your vehicle may be adversely affected until the idle
trim is eventually relearned.
If the battery has been disconnected or a new battery has been installed,
the clock and the preset radio stations must be reset once the battery is
reconnected.
•Always dispose of automotive
batteries in a responsible manner.
Follow your local authorized
standards for disposal. Call your
local authorized recycling center
to find out more about recycling
automotive batteries.
Low and high voltage battery – storage
Your vehicle must be started and run for a minimum of 10 minutes once
a month in order to maintain the high voltage battery charge. This will
maintain the high voltage battery but it is not enough to maintain the
low voltage (underhood) battery and additional low voltage (underhood)
battery charging may be required after 60 days.
If your vehicle is to be stored for 30 days or longer, the low voltage
(underhood) battery negative terminal must be disconnected. Failure to
do this could damage your vehicle’s batteries.
ENGINE COOLANT AND MOTOR/ELECTRONICS COOLANT
Your vehicle is equipped with two separate coolant systems. One is for
engine cooling and the other is for various electric motors and other
components that are specific to the hybrid operating systems.
L
E
A
D
RETURN
RECYCLE
2009 Mariner Hybrid(mhv)
Owners Guide, 1st Printing
USA(fus)
Maintenance and Specifications
280

Checking engine coolant
The concentration and level of
engine coolant should be checked at
the intervals listed inscheduled
maintenance information. The
coolant concentration should be
maintained at 50/50 coolant and
distilled water, which equates to a
freeze point of -34°F (-36°C).
Coolant concentration testing is
possible with a hydrometer or
antifreeze tester (such as the
Rotunda Battery and Antifreeze
Tester, 014–R1060). The level of
coolant should be maintained at the
“FULL COLD” level or within the
“COLD FILL RANGE” in the coolant
reservoir. If the level falls below, add
coolant per the instructions in the
Adding engine coolantsection.
When the engine is cold, check the
level of engine coolant in the
reservoir.
2009 Mariner Hybrid(mhv)
Owners Guide, 1st Printing
USA(fus)
Maintenance and Specifications
281

•Minimize A/C and defroster usage. Selecting defrost, or defrost/floor
mode on the climate control system will force the engine to run
continuously, which reduces fuel economy. Selecting AUTO will
typically force the engine to run continuously, unless ECON is
selected. ECON will allow the engine to shut down for a period of
time, even when air conditioning is requested.
•Minimize temperature extremes when the vehicle is parked, for
example by storing in a garage to avoid extreme cold in winter and
extreme sun loads in summer. The high voltage battery operates more
efficiently in moderate temperatures.
•Combine errands. Your vehicle is more fuel efficient when the engine
is warm. Driving to your farthest destination first will warm the engine
more quickly and may improve fuel economy for the rest of the trip.
Maintenance
•Keep tires properly inflated and use only recommended size.
•Keep wheels properly aligned.
•Use recommended engine oil. Refer toLubricant specificationsin
this chapter.
•Perform all regularly scheduled maintenance items. Follow the
recommended maintenance schedule and owner maintenance checks
found inscheduled maintenance information.
Conditions
•Heavily loading a vehicle or towing a trailer may reduce fuel economy
at any speed.
•Carrying unnecessary weight may reduce fuel economy (approximately
1 mpg [0.4 km/L] is lost for every 300 lb [136 kg] of weight carried).
•Adding certain accessories to your vehicle (for example; bug
deflectors, rollbars/light bars, running boards, ski/luggage racks, flags)
may reduce fuel economy.
•Using fuel blended with alcohol may lower fuel economy.
•Driving on flat terrain offers improved fuel economy as compared to
driving on mountainous terrain.
•Close windows for high speed driving.
2009 Mariner Hybrid(mhv)
Owners Guide, 1st Printing
USA(fus)
Maintenance and Specifications
294

If theService engine soonindicator remains on, have your vehicle
serviced at the first available opportunity. Although some malfunctions
detected by the OBD-II may not have symptoms that are apparent,
continued driving with theService engine soon
indicator on can
result in increased emissions, lower fuel economy, reduced engine and
transmission smoothness, and lead to more costly repairs.
Readiness for Inspection/Maintenance (I/M) testing
Some state/provincial and local governments may have
Inspection/Maintenance (I/M) programs to inspect the emission control
equipment on your vehicle. Failure to pass this inspection could prevent
you from getting a vehicle registration. Your vehicle may not pass the I/M
test if theService engine soon
indicator is on or not working
properly (bulb is burned out), or if the OBD-II system has determined
that some of the emission control systems have not been properly
checked. In this case, the vehicle is considered not ready for I/M testing.
If theService engine soon
indicator is on or the bulb does not
work, the vehicle may need to be serviced. Refer to the On board
diagnostics (OBD-II) description in this chapter.
If the vehicle’s engine or transmission has just been serviced, or the
battery has recently run down or been replaced, the OBD-II system may
indicate that the vehicle is not ready for I/M testing. To determine if the
vehicle is ready for I/M testing, turn the ignition key to the on position
for 15 seconds without cranking the engine. If theService engine
soon
indicator blinks eight times, it means that the vehicle is not
ready for I/M testing; if theService engine soon
indicator stays on
solid, it means that the vehicle is ready for I/M testing.
The OBD-II system is designed to check the emission control system
during normal driving. A complete check may take several days. If the
vehicle is not ready for I/M testing, the following driving cycle consisting
of mixed city and highway driving may be performed:
15 minutes of steady driving on an expressway/highway followed by
20 minutes of stop-and-go driving with at least four 30-second idle periods.
Allow the vehicle to sit for at least eight hours without starting the
engine. Then, start the engine and complete the above driving cycle. The
engine must warm up to its normal operating temperature. Once started,
do not turn off the engine until the above driving cycle is complete. If
the vehicle is still not ready for I/M testing, the above driving cycle will
have to be repeated.
2009 Mariner Hybrid(mhv)
Owners Guide, 1st Printing
USA(fus)
Maintenance and Specifications
297

HIGH VOLTAGE BATTERY COOLING FILTER (REAR A/C)
MAINTENANCE
The high voltage battery has a dedicated A/C cooling system which
includes an air filter.
Refer to thescheduled maintenance informationfor the appropriate
intervals for air filter.
When changing the air filter element, use only the Motorcraft air filter
element listed. Refer toMotorcraft part numbersin this chapter.
Changing the high voltage battery air filter element
1. Remove access panel located in
the rear cargo area on the driver’s
side trim panel to expose the filter
cover.
2. Push the tabs (located on each
side of filter cover) while pulling
gently to remove filter cover.
Remove the old filter.
3. Install new filter and filter cover (note arrows indicating top side).
The arrow on the filter cover and the arrow on the filter both point in
the same direction (upward).
4. Re-install the access panel into the trim panel.
2009 Mariner Hybrid(mhv)
Owners Guide, 1st Printing
USA(fus)
Maintenance and Specifications
302

MOTORCRAFT PART NUMBERS
Component 2.5L I4 engine
Oil filter FL-910 or FL-2017-B1
PCV valve2
Spark plugs3
Engine air filter element FA-17724
Rear A/C (high voltage battery
cooling) air filter elementFP-51
Cabin air filter FP-66
Low voltage (underhood) battery BXT-96R
1When changing oil filter you must also replace the filter cap O-ring. The
oil filter drain plug O-ring must also be replaced whenever the oil filter
drain plug is removed. Reuse of the O-rings may cause engine oil leakage
and may result in severe engine damage. The customer warranty may be
void for any damage to the engine if the O-rings are not replaced.
2The PCV valve is a critical emission component. It is one of the items
listed inscheduled maintenance informationchapter and is essential
to the life and performance of your vehicle and to its emissions system.
For PCV valve replacement, see your authorized dealer. Refer to
scheduled maintenance informationchapter for the appropriate
intervals for changing the PCV valve.
Replace the PCV valve with one that meets Ford material and
design specifications for your vehicle, such as a Motorcraft or
equivalent replacement part. The customer warranty may be void
for any damage to the emissions system if such a PCV valve is not
used.
3For spark plug replacement, see your authorized dealer. Refer to
scheduled maintenance informationchapter for the appropriate
intervals for changing the spark plugs.
Replace the spark plugs with ones that meet Ford material and
design specifications for your vehicle, such as Motorcraft or
equivalent replacement parts. The customer warranty may be
void for any damage to the engine if such spark plugs are not
used.
4Failure to use the correct air filter element may result in severe engine
damage. The customer warranty may be void for any damage to the
engine if the correct air filter element is not used.
2009 Mariner Hybrid(mhv)
Owners Guide, 1st Printing
USA(fus)
Maintenance and Specifications
303

ENGINE DATA
Engine 2.5L I4 engine
Cubic inches 152
Required fuel 87 octane
Firing order 1-3-4-2
Ignition system Coil on plug
Spark plug gap 0.049–0.053 inch (1.25–1.35mm)
Compression ratio 12.3:1
Engine drivebelt routing
•2.5L I4 Engine
HIGH VOLTAGE BATTERY DATA
High Voltage Battery
Battery chemistry Nickel metal hydride
Nominal voltage 330 volts
Battery system capacity 6 amp-hours
2009 Mariner Hybrid(mhv)
Owners Guide, 1st Printing
USA(fus)
Maintenance and Specifications
307

Peace of mind
Wheel locks
For maximum vehicle performance, keep the following information in
mind when adding accessories or equipment to your vehicle:
•When adding accessories, equipment, passengers and luggage to your
vehicle, do not exceed the total weight capacity of the vehicle or of
the front or rear axle (GVWR or GAWR as indicated on the Safety
Compliance Certification label). Consult your authorized dealer for
specific weight information.
•The Federal Communications Commission (FCC) and Canadian Radio
Telecommunications Commission (CRTC) regulate the use of mobile
communications systems — such as two-way radios, telephones and
theft alarms - that are equipped with radio transmitters. Any such
equipment installed in your vehicle should comply with FCC or CRTC
regulations and should be installed only by a qualified service
technician.
•Mobile communications systems may harm the operation of your
vehicle, particularly if they are not properly designed for automotive
use.
•To avoid interference with other vehicle functions, such as anti-lock
braking systems, amateur radio users who install radios and antennas
onto their vehicle should not locate the Amateur Radio Antennas in
the area of the driver’s side hood.
•Electrical or electronic accessories or components that are added to
the vehicle by the authorized dealer or the owner may adversely affect
battery performance and durability.
2009 Mariner Hybrid(mhv)
Owners Guide, 1st Printing
USA(fus)
Accessories
311