2008 Mercury Mariner Hybrid coolant temperature

Question Answer
Why does my engine never shut
down above 40 mph (64 km/h)?The engine is required to turn on
above this speed to protect the
transaxle hardware.
Why does my engine stay ON
when it’s extremely cold outside?In order to ensure that the climate
control system can begin heating
the cabin and/or defrosting the
windshield as soon as a driver
requests it, the engine coolant
temperature has to be kept
sufficiently hot. Keeping the
engine on is required to maintain
the correct minimum temperature.
Why does my engine rev up so
high sometimes when I accelerate?Your vehicle’s engine and
transmission are designed to
deliver the power you need at the
most efficient engine speed. This
may be higher than expected
during heavy accelerations, and
may fluctuate during steady state
driving. These are characteristics
of the Atkinson engine cycle and
the eCVT transaxle technology
that help maximize your hybrid’s
fuel economy.
What does it mean when my
power assist gauge moves to the
right? To the left?Electricity is coming out of the
battery when the gauge moves to
the right. Electricity is going into
the battery when the gauge moves
to the left.
2008 Mariner Hybrid(mhv)
Owners Guide (post-2002-fmt)
USA(fus)
Introduction
11

Vehicle Symbol Glossary
Power Windows
Front/Rear
Power Window Lockout
Child Safety Door
Lock/UnlockInterior Luggage
Compartment Release
Panic AlarmEngine Oil
Engine CoolantEngine Coolant
Temperature
Do Not Open When HotBattery
Avoid Smoking, Flames,
or SparksBattery Acid
Explosive GasFan Warning
Power Steering FluidMaintain Correct Fluid
LevelMAX
MIN
Emission SystemEngine Air Filter
Passenger Compartment
Air FilterJack
Check Fuel CapLow Tire Pressure
Warning
2008 Mariner Hybrid(mhv)
Owners Guide (post-2002-fmt)
USA(fus)
Introduction
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Engine or motor electronic
coolant temperature:Illuminates
when the coolant temperature
exceeds the threshold. When the light is flashing or remains on, stop the
vehicle as soon as possible, switch off the engine and let cool. Refer to
Engine coolant and motor/electronics coolantin theMaintenance
and Specificationschapter.
Never remove the coolant reservoir cap while the engine is
running or hot.
ABS active/Traction control
active (if equipped):Flashes
when the ABS system is active. If
the light remains on, have the
system serviced immediately, refer
to theDrivingchapter for more
information.
Low tire pressure warning:
Illuminates when your tire pressure
is low. If the light remains ON at
start up or while driving, the tire
pressure should be checked. Refer
toInspecting and Inflating Your Tiresin theTires, Wheels and
Loadingchapter. When the ignition is first turned to RUN, the light will
illuminate for 3 seconds to ensure the bulb is working. If the light does
not turn ON or begins to flash, have the system inspected by your
authorized dealer. For more information on this system, refer to
Understanding Your Tire Pressure Monitoring Systemin theTires,
Wheels and Loadingchapter.
Low fuel:Illuminates when the fuel
level in the fuel tank is at or near
empty (refer toFuel gaugein this
chapter).
2008 Mariner Hybrid(mhv)
Owners Guide (post-2002-fmt)
USA(fus)
Instrument Cluster
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REAR RIGHT DOOR AJAR.Displayed when the rear right door is not
completely closed.
STOP SAFELY NOW.Displayed when the Master electrical hazard
warning lamp is illuminated indicating a Hybrid component failure. If this
warning occurs, the vehicle will soon shutdown without further warning,
stop the vehicle as soon as safely possible and contact your authorized
dealer as soon as possible.
HIGH ENGINE TEMPERATURE.Displayed when the engine coolant
is overheating. Engine coolant temperature warning lamp will illuminate
indicating coolant temperature is high. Stop the vehicle as soon as safely
possible, turn off the engine and let it cool. Check the coolant and
coolant level. Refer toEngine coolantin theMaintenance and
Specificationschapter. If the warning stays on or continues to come on,
contact your authorized dealer as soon as possible.
When the engine and radiator are hot, scalding coolant and
steam may shoot out under pressure and cause serious injury.
Do not remove the cooling system cap when the engine and radiator
are hot.
HIGH MOTOR TEMPERATURE.Displayed when the motor
electronics are overheating. Stop the vehicle as soon as safely possible,
turn off the engine and let it cool. Refer toEngine coolant and
motor/electronics coolantin theMaintenance and Specifications
chapter. If the warning stays on or continues to come on, contact your
authorized dealer as soon as possible.
PARK BRAKE ENGAGED.
Displayed when the manual park brake is set,
the engine is running and the vehicle is driven more than 3 mph (5 km). If
the warning stays on after the park brake is released, contact your
authorized dealer as soon as possible.
XXX MILES TO EMPTY FUEL LEVEL LOW.Displayed as an early
reminder of a low fuel condition.
LIFTGATE/GLASS AJAR.Displayed when the liftgate or liftgate glass
is not completely closed. Press RESET to reset display.
SERVICE BRAKE SYSTEM.Displayed when the braking system is not
operating properly. If the warning stays on or continues to come on,
contact your authorized dealer as soon as possible.
LOW BRAKE FLUID.Indicates the brake fluid level is low and the
brake system should be inspected immediately. Refer toBrake fluid
reservoirin theMaintenance and Specificationschapter.
2008 Mariner Hybrid(mhv)
Owners Guide (post-2002-fmt)
USA(fus)
Driver Controls
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resetting of the fuel pump/high voltage shut-off switches or service. For
information on jump starting the vehicle and resetting the fuel
pump/high voltage shut-off switches, refer to theJump starting your
vehicle (low voltage [underhood] battery only)section, theJump
starting the high voltage batterysection, and theFuel pump/High
voltage shut-off switchessection found in theRoadside Emergencies
chapter.
Guarding against exhaust fumes
Carbon monoxide is present in exhaust fumes. Take precautions to avoid
its dangerous effects.
If you smell exhaust fumes inside your vehicle, have your dealer
inspect your vehicle immediately. Do not drive if you smell
exhaust fumes.
Important ventilating information
If the engine is idling while the vehicle is stopped for a long period of
time, open the windows at least one inch (2.5 cm) or adjust the heating
or air conditioning to bring in fresh air.
ENGINE BLOCK/HIGH VOLTAGE BATTERY HEATER
(IF EQUIPPED)
An engine block/high voltage battery heater warms the engine coolant
and high voltage battery cells which aids in starting, vehicle performance
and heater/defroster performance in cold weather. Use of an engine
block/high voltage battery heater is strongly recommended if you live in
a region where temperatures reach -10°F (-23°C) or below. For best
results, plug the heater in at least three hours before starting the vehicle.
The heater can be plugged in the night before starting the vehicle.
To reduce the risk of electrical shock, do not use your heater
with ungrounded electrical systems or two-pronged (cheater)
adapters.
BRAKES
Occasional brake noise is normal. If a metal-to-metal, continuous grinding
or continuous squeal sound is present, the brake linings may be worn-out
and should be inspected by an authorized dealer. If the vehicle has
continuous vibration or shudder in the steering wheel while braking, the
vehicle should be inspected by an authorized dealer.
2008 Mariner Hybrid(mhv)
Owners Guide (post-2002-fmt)
USA(fus)
Driving
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WINDSHIELD WASHER FLUID
Add fluid to fill the reservoir if the
level is low. In very cold weather, do
not fill the reservoir completely.
Only use a washer fluid that meets Ford specifications. Do not use any
special washer fluid such as windshield water repellent type fluid or bug
wash. They may cause squeaking, chatter noise, streaking and smearing.
Refer to theMaintenance product specifications and capacities
section in this chapter.
State or local regulations on volatile organic compounds may restrict the
use of methanol, a common windshield washer antifreeze additive.
Washer fluids containing non-methanol antifreeze agents should be used
only if they provide cold weather protection without damaging the
vehicle’s paint finish, wiper blades or washer system.
If you operate your vehicle in temperatures below 40°F (4.5°C),
use washer fluid with antifreeze protection. Failure to use
washer fluid with antifreeze protection in cold weather could result in
impaired windshield vision and increase the risk of injury or accident.
Note:Do not put washer fluid in the engine coolant reservoir. Washer
fluid placed in the cooling system may harm engine and cooling system
components.
Checking and adding washer fluid for the liftgate
Washer fluid for the liftgate is supplied by the same reservoir as the
windshield.
2008 Mariner Hybrid(mhv)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
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Checking motor/electronics (M/E) coolant
The M/E coolant reservoir is located
behind the engine coolant reservoir.
Refer to the following engine
coolant sections for all information,
instructions and warnings related to
cooling systems. The two systems
use the same coolant and operate
similarly, with the Motor and
Electronics system generally
operating at a lower temperature
and pressure. The fluid levels in
both reservoirs need to be
maintained. When the engine is
cold, check the level of M/E coolant
in the reservoir.
Factory fill and coolant specifications
Your vehicle was factory-filled with a 50/50 engine coolant and water
concentration. If the concentration of coolant falls below 40% or above
60%, the engine parts could become damaged or not work properly.A
50–50 mixture of coolant and water provides the following:
•Freeze protection down to -34°F (-36°C).
•Boiling protection up to 265°F (129°C).
•Protection against rust and other forms of corrosion.
•Enables calibrated gauges to work properly.
Common instructions for cooling systems
•The engine coolant should be at the “FULL COLD” level or within the
“COLD FILL RANGE” as listed on the engine coolant reservoir
(depending upon application).
•Refer to thescheduled maintenance informationfor service interval
schedules.
•Be sure to read and understandPrecautions when servicing your
vehiclein this chapter.
2008 Mariner Hybrid(mhv)
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USA(fus)
Maintenance and Specifications
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Whenever coolant has been added, the coolant level in the coolant
reservoir should be checked the next few times you drive the vehicle. If
necessary, add enough 50/50 concentration of engine coolant and
distilled water to bring the liquid level to the proper level.
If you have to add more than 1.0 quart (1.0 liter) of engine coolant per
month, have your authorized dealer check the engine cooling system.
Your cooling system may have a leak. Operating an engine with a low
level of coolant can result in engine overheating and possible engine
damage.
Recycled engine coolant
Ford Motor Company does NOT recommend the use of recycled engine
coolant in vehicles originally equipped with Motorcraft Premium Gold
Engine Coolant since a Ford-approved recycling process is not yet
available.
Used engine coolant should be disposed of in an appropriate
manner. Follow your community’s regulations and standards for recycling
and disposing of automotive fluids.
Coolant refill capacity
To find out how much fluid your vehicle’s cooling system can hold, refer
toMaintenance product specifications and capacitiesin this chapter.
Fill your engine coolant reservoir as outlined inAdding engine coolant
in this section.
Severe climates
If you drive in extremely cold climates (less than –34°F [–36°C ]):
•It may be necessary to increase the coolant concentration
above 50%.
•NEVER increase the coolant concentration above 60%.
•Increased engine coolant concentrations above 60% will
decrease the overheat protection characteristics of the engine
coolant and may cause engine damage.
•Refer to the chart on the coolant container to ensure the
coolant concentration in your vehicle will provide adequate
freeze protection at the temperatures in which you drive in the
winter months.
2008 Mariner Hybrid(mhv)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
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