check engine Acura MDX 2007 User Guide

Drive moderately. Rapid
acceleration, abrupt cornering,
and hard braking use more fuel.
Always drive in the highest gear
possible.
Try to maintain a constant speed.
Everytimeyouslowdownand
speed up, your vehic le uses extra
fuel. Use cruise control when
appropriate. Combine
several short trips into
one.
The air conditioning puts an extra
load on the engine which makes it
usemorefuel.Usethefresh-air
ventilation when possible.
Always
maintain your vehicle
according to the maintenance
messages. See (page ).
an underinf lated tire
causes more ‘‘rolling resistance,’’
which uses more f uel.
The build-up of snow or mud on
your vehicle’s underside adds
weight and rolling resistance.
Frequent cleaning helps your f uel
mileage and reduces the chance of
corrosion. 381
For example,
Improving Fuel Economy
Owner’s
Maintenance Checks
Fuel Economy
Bef ore Driving
321
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This section gives you tips on
starting the engine under various
conditions, and how to operate the
automatic transmission. It also
includes important inf ormation on
parking your vehicle, the braking
system, the super handling-all wheel
drive (SH-AWD) system, the vehicle
stability assist (VSA) system, active
damper system, the tire pressure
monitoring system (TPMS), and
f acts you need if you are planning to
tow a trailer or drive off-high way.........................
Driving Guidelines .330
........................
Preparing to Drive .330
.......................
Starting the Engine .332
Check Starting System .................................
Message .332
..............
Automatic Transmission . 333
Super Handling-All Wheel Drive ...................
(SH-AWD) System . 340
...........................................
Parking .342
Tire Pressure Monitoring System ......................................
(TPMS) .343
.............................
Braking System .348
...............
Anti-lock Brakes (ABS) . 349
Vehicle Stability Assist (VSA) ........................................
System .351
................
Active Damper System . 353
...........................
Towing a Trailer .355
..................
Trailer Stability Assist . 367
..............
Of f -Highway Guidelines . 369
Driving
Driving
329
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CONTINUED
Check the adjustment of the
inside and outside mirrors (see
page ).
Check the steering wheel
ad justment (see page ).
Make sure the doors and tailgate
are securely closed and locked.
Fasten your seat belt. Check that
your passengers have fastened
their seat belts (see page ).
Wh en you start the engine, check
the gauges and indicato rs in the
instrument panel, and the
messages on the multi-info rmation
display (see page , and
). Without
touching the accelerator
pedal, turn the ignition switch to
the START (III) position, then
release the ignition switch. You do
not need to hold the ignition
switch in the START (III) position
to start the engine. Depending on
the outside temperature, the starter
motor runs for about 6 to 9
seconds until the engine starts.
If you hold the ignition switch in
the START (III) position for more
than 7 seconds, the starter motor,
depending on the outside
temperature, runs for about 10 to
25 seconds until the engine starts.
If the engine does not start, wait at
least 10 seconds before trying
again.
Make sure the shift lever is in
Park. Press on the brake pedal.
In
cold weather, turn off all
electrical accessories to reduce
the drain on the battery.
Apply
the parking brake.
Your
vehicle’s starting system has an
auto control mode. When you turn
the ignition switch to the START
(III) position, this feature keeps the
engine’s starter motor running until
the engine starts. Follow these
instru ctions to start the engine:
1.
2.
3.
4.
6.
7.
8.
9.
10. 15
63 72
152
124
81
128
Pr epar ing to Drive, Starting the Engine
Starting theEngine
Driving
331
T he immobilizer system protects your
vehicle f rom thef t. If an improperly-
coded key (or other device) is used, the
engine’s f uel system is disabled. For
more inf ormation, see page .
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If this message is on, the ignition
switchhastobeheldinthe
START (III) position manually
until the engine starts. The
ignitionswitchcanbeheldinthat
position up to 15 seconds.
Even though you may be able to
start the engine manually without
the auto control mode of the starting
system, have your dealer inspect
your vehicle.
If there is a problem with the
starting system, you will see a
‘‘CHECK STARTING SYSTEM’’
message on the multi-inf ormation
display when the ignition switch is
turned to the ON (II) position. You
will also see this message when the
auto control mode of the starting
system has a problem.
If the engine does not start within
15 seconds, or starts but stalls
right away, repeat step 4 with the
accelerator pedal pressed halfway
down. If the engine starts, release
pressure on the accelerator pedal
so the engine does not race.
If the engine fails to start, press
the accelerator pedal all the way
down, and hold it there while
starting to clear flooding. If the
engine still does not start, return
to step 5.
5.
6.
Starting the Engine
Check Starting System Message
332
The engine is harder to start in cold
weather. Also, the thinner air f ound at
altitudes above 8,000 f eet (2,400
meters) adds to this problem.
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If you need to use the shif t lock
release, it means your vehicle is
developing a problem. Have the
vehicle checked by a dealer.
Put a cloth on the edge of the shif t
lock release slot cover next to the
shif t lever. Use a small f lat-tipped
screwdriver or a metal f ingernail
f ile to remove the cover. Caref ully
pry on the edge of the cover. Push down on the key while you
pressthereleasebuttononthe
shif t lever and move the shif t lever
out of Park to neutral.Remove the key from the shift
lock release slot, then reinstall the
cover. Make sure the notch on the
cover is on the driver’s side. Press
the brake pedal, and restart the
engine.
Insert a key into the shift lock
release slot.
3. 4.
5.6.
Automatic Transmission
Driving
339
COVER
SHIFT LOCK RELEASE SLOT
RELEASE
BUTTON
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Your vehicle still has normal f ront-
wheel drive with vehicle stability
assist (VSA), but does not have
the advantages of SH-AWD. Have
your vehicle checked by a dealer
as soon as possible.
If the SH-AWD indicator on the
instrument panel stays on, and the
‘‘CHECK SH-AWD SYSTEM’’
message also appears on the multi-
inf ormation display, there is problem
with the SH-AWD system.
If the SH-AWD indicator blinks while
driving, it indicates the dif f erential
temperature is too high. You will also
see an ‘‘SH-AWD DIFF TEMP.
HIGH’’ message on the multi-
inf ormation display. If this happens,
pull to the side of the road when it is
saf e, shif t to Park, and let the engine
idle until the indicator goes out. If
the indicator does not go out, take
your vehicle to a dealer to have it checked.
Super Handling-A ll Wheel Drive (SH-A WD) System
Driving
341
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Your vehicle is equipped with a tire
pressure monitoring system (TPMS)
that turns on every time you start the
engine and monitors the pressure in
your tires while driving.
Each tire has its own pressure
sensor. If the air pressure of a tire
becomes signif icantly low, the
sensor in that tire immediately sends
a signal that causes the low tire
pressure indicator in the instrument
panel to come on. If this happens,
you will see which tire is losing
pressure on the multi-inf ormation
display along with a ‘‘CHECK TIRE
PRESSURE’’ message.When the low tire pressure indicator
is on, one or more of your tires is
signif icantly underinf lated. You
should stop and check your tires as
soon as possible, and inf late them to
the proper pressure as indicated on
the vehicle’s tire inf ormation placard.
It is possible that the pressures
shown on the multi-inf ormation
display and the pressures you
manually measure are slightly
dif f erent.
If the dif f erence is signif icant or you
cannot make the low tire pressure
indicator and message on the multi-
inf ormation display go out af ter
inf lating the tires to the specif ied
values, have your dealer check the
system as soon as possible.
Becausetirepressurevariesby
temperature and other conditions,
the low tire pressure indicator may
come on unexpectedly. Driving on a signif icantly under-
inf lated tire causes the tire to
overheat and can lead to tire failure.
Under-inf lation also reduces f uel
efficiency and tire tread life, and may
af f ect the vehicle’s handling and
stopping ability. If the tire is f lat, or if the tire
pressure is too low to continue
driving, replace the tire with the
compact spare tire.
CONT INUED
Tire Pressure Monitoring System (TPMS)
Low Tire Pressure
Indicator
Driving
343
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Your vehicle is equipped with disc
brakes at all f our wheels. A power
assist helps reduce the ef f ort needed
on the brake pedal. Emergency
Brake Assist System increases the
stopping f orce when you depress the
brake pedal hard in an emergency
situation. The anti-lock brake system
(ABS) helps you retain steering
control when braking very hard.
Resting your f oot on the brake pedal
applies the brakes slightly. This
builds up heat, and reduces brake
ef f ectiveness and brake pad lif e. In
addition, f uel economy can be
reduced. It also keeps your brake
lights on all the time, conf using
drivers behind you.The hydraulic system that operates
the brakes has two separate circuits.
Each circuit works diagonally across
the vehicle (the lef t-f ront brake is
connected with the right-rear brake,
etc.). If one circuit should develop a
problem, you will still have braking
at two wheels.
All f our brakes have audible brake
wear indicators.
If the brake pads need replacing, you
will hear a distinctive, metallic
screeching sound when you apply
the brake pedal. If you do not have
the brake pads replaced, they will
screech all the time. It is normal f or
the brakes to occasionally squeal or
squeak when you apply them.
Constant application of the brakes
when going down a long hill builds
up heat and reduces their ef f ective-
ness. Use the engine to assist the
brakes by taking your f oot of f the
accelerator and downshif ting to a
lower gear.
Check the brakes after driving
through deep water. Apply the
brakes moderately to see if they f eel
normal. If not, apply them gently and
f requently until they do. Be extra
cautious in your driving.
Braking System
Braking System Design
Brake Wear Indicators
348
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When VSA activates, you may notice
that the engine does not respond to
the accelerator in the same way it
does at other times. There may also
be some noise from the modulator. When
VSA activates, you will see the
VSA activation indicator blink. There
mayalsobesomenoisefromthe
modulator.
The
vehicle stability assist (VSA)
system helps to stabilize the vehicle
during cornering if the vehicle turns
more or less than desired. It also
assists you in maintaining traction
while accelerating on loose or
slippery road surfaces. It does this
by regulating the engine’s output and
by selectively applying the brakes.
If the VSA system indicator comes
on while driving, pull to the side of
theroadwhenitissafe,andturnoff
the engine. Reset the system by
restarting the engine. If the VSA
system indicator stays, or comes
back on while driving, have the VSA
system inspected by your deale r. If
the indicator does not come on
when the ignition switch is turned to
the ON (II) position, there may be a
problem with the VSA system. Have
your dealer inspect your vehic le as
soon as possible.
You will also see a ‘‘CHECK VSA
SYSTEM’’ message on the multi-
information display if there is a
problem with the VSA system.
If the low tire pressure indicator
comes on (see page ), or the
multi-info rmation display shows a
‘‘CHECK TPMS SYSTEM’’ message
(see page ), the VSA system
automatically turns on even if you
turn it of f with the VSA OFF switch.
Without VSA, your vehicle will have
normal braking and cornering ability,
but it will not have VSA traction and
stability enhancement.
The VSA system cannot enhance the
vehicle’s driving stability in all
situations and does not control your
vehicle’s entire braking system. It is
still your responsibility to drive and
corner at reasonable speeds and to
leave a sufficient margin of safety.
82
343
VSA A ctivation Indicator
VSA System Indicator
Vehicle Stability Assist (VSA) System
Driving
351
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Under these conditions, trailer
stability assist begins to stabilize the
vehicl e/trailer combination by
reducing the vehicle speed. The
control unit sends signals to
selectively apply the brakes and
regulate the engine output. The
brake lights of your vehicle will be
turned on automatically by the
system even if you do not keep the
pressu re on the brake pedal.
Your
vehicle is equipped with trailer
stability assist function. This
function works on the same sensors
as the vehicle stability assist (VSA)
system. This function helps to
stabilize the vehicl e/trailer
combination when the trailer
severely sways or oscillates. For
more information of the VSA system,
see page .
When the brakes are applied, the
trailer’s brake lights come on along
wi th the vehicle brake lights.
When the trailer stability assist
activates, you will see the VSA
activation indicator blink. There may
also be some noise from the VSA
hydraulic system. Trailer
stability assist cannot prevent
a loss of control. Always reduce the
ve hicle speed and steer firmly. Do
not brake suddenly or make quick
steering motion. It could cause the
trailertojackknifeorturnoverand
the system becomes ineffective.
Trailer stability assist cannot prevent
swaying that can occur in crosswinds
and in normal and emergency
driving maneuvers. It helps only to
stabilize the vehicl e/trailer
combination in these conditions,
after the oscillation becomes severe.
If
the function detects the vehicle/
trailer instability, it checks if the
swaying is caused by the trailer, and
if the trailer swaying or oscillation is
increasing.
The vehicle/trailer combination is
more affected by crosswinds,
buffeting, and improper tongue load.
These conditions can make the
trailer unstable, and cause it to sway. Always obey the recommended
speed limits f or towing a trailer, see
page . Trailer stability assist will also be
inef f ective while driving at high
speed or towing a trailer with a high
center or gravity.
351
365
T railer Stability A ssist
Driving
367
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