2009 Mercury Mariner Hybrid coolant temperature

Question Answer
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.
What is the fan noise and slight
tapping sound I hear from the rear
of my hybrid?The fan noise comes from two fans
located inside the high voltage
battery. These fans turn on when
the battery requires cooling air.
The fan speed, and associated
noise level, will change according
to the amount of cooling required
to maintain good performance.
2009 Mariner Hybrid(mhv)
Owners Guide, 1st Printing
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
Service Engine SoonEngine Air Filter
Passenger Compartment
Air FilterJack
Check Fuel CapLow Tire Pressure
Warning
2009 Mariner Hybrid(mhv)
Owners Guide, 1st Printing
USA(fus)
Introduction
17

Safety belt:Reminds you to fasten
your safety belt. A Belt-Minder
chime will also sound to remind you
to fasten your safety belt. Refer to
theSeating and Safety Restraints
chapter to activate/deactivate the Belt-Minderchime feature.
Master vehicle electrical hazard
warning lamp:Indicates Hybrid
component fault/failure that will
cause the vehicle to shutdown or
fail to start.
Note: If the vehicle is still running, the vehicle may soon
shutdown without further warning and should be stopped safely.
If this lamp is lit, stop the vehicle, shift to P (Park), turn the key to the
Off position, and attempt to restart the vehicle. If the fault remains, the
vehicle may require refueling, jump starting, resetting of the shut-off
switches, or service. For information regardingLow voltage
[underhood] battery onlyandFuel pump/High voltage shut-off
switchesplease refer to theRoadside Emergencieschapter.
Ready indicator light:Illuminates
once the vehicle has successfully
started. Indicates the vehicle is
ready to drive even when you don’t
hear the engine running.
Charging system:Illuminates when
the 12V charging system is not
working properly.
Engine oil pressure:Illuminates
when the oil pressure falls below the
normal range, refer toEngine oilin
theMaintenance and
Specificationschapter.
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.
2009 Mariner Hybrid(mhv)
Owners Guide, 1st Printing
USA(fus)
Instrument Cluster
20

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 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.
WARNING: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/h). If the warning stays on after the park brake is released,
contact your authorized dealer as soon as possible.
XXX MILES TO E 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.
CHECK 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.
CHECK FUEL FILL INLET— Displayed when the fuel fill inlet may
not be properly closed. Refer toEasy Fuel™ “no cap” fuel systemin
theMaintenance and Specificationschapter.
BRAKE FLUID LEVEL LOW— Indicates the brake fluid level is low
and the brake system should be inspected immediately. Refer toBrake
fluidin theMaintenance and Specificationschapter.
REGEN BRAKE DISABLED— Indicates the regenerative braking
system is disabled at this moment. Please see your authorized dealer if
this warning remains present over several days.
2009 Mariner Hybrid(mhv)
Owners Guide, 1st Printing
USA(fus)
Driver Controls
84

Note:After starting the vehicle, the engine may stop running to
conserve fuel after it is warmed-up and the high voltage battery is
sufficiently charged.
Note:If the vehicle does not start, put the gearshift lever into P (Park),
turn the ignition off, then attempt to start the vehicle again. If the
vehicle still does not start, it may require refueling, jump starting,
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
vehiclesection and theFuel pump/High voltage shut-off switches
section found in theRoadside Emergencieschapter.
Guarding against exhaust fumes
Carbon monoxide is present in exhaust fumes. Take precautions to avoid
its dangerous effects.
WARNING: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 and allows the
heater/defroster system to respond quickly. If your vehicle is equipped
with this system, your equipment includes a heater element which is
installed in your engine block and a wire harness which allows the user
to connect the system to a grounded 120 volt a/c electrical source. The
block heater system is most effective when outdoor temperatures reach
below 0°F (-18°C).
WARNING:Failure to follow engine block heater instructions
could result in property damage or physical harm.
2009 Mariner Hybrid(mhv)
Owners Guide, 1st Printing
USA(fus)
Driving
201

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.
WARNING:If you operate your vehicle in temperatures below
40°F (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.
2009 Mariner Hybrid(mhv)
Owners Guide, 1st Printing
USA(fus)
Maintenance and Specifications
273

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.
2009 Mariner Hybrid(mhv)
Owners Guide, 1st Printing
USA(fus)
Maintenance and Specifications
282

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.
2009 Mariner Hybrid(mhv)
Owners Guide, 1st Printing
USA(fus)
Maintenance and Specifications
285