2012 Acura MDX ignition

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
instructions to start the engine:
1. Apply the parking brake.
2. In cold weather, turn off all
electrical accessories to reduce the
drain on the battery.
3. Make sure the shift lever is in
Park. Press on the brake pedal.4. 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.
The immobilizer system protects your
vehicle from theft. If an improperly-
coded key (or other device) is used, the
engine's fuel system is disabled. For
more information, see page 138.
The engine is harder to start in cold
weather. Also, the thinner air found at
altitudes above 8,000 feet (2,400
meters) adds to this problem.
Starting the Engine442

Check Starting System MessageIf there is a problem with the starting
system, you will see a‘‘CHECK
STARTING SYSTEM’’message on
the multi-information 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 this message is on, the ignition
switch has to be held in the START
(III) position manually until the
engine starts. The ignition switch can
be held in that 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.Shift Lever Position Indicators
These indicators on the instrument
panel show which position the shift
lever is in.
The‘‘D’’indicator comes on for a few
seconds when you turn the ignition
switch to the ON (II) position. If it
flashes while driving (in any shift
position), it indicates a possible
problem in the transmission.
CONTINUED
Starting the Engine, Automatic Transmission
443
Driving

If the malfunction indicator lamp
comes on along with the‘‘D’’
indicator, there is a problem with the
automatic transmission control
system. Avoid rapid acceleration, and
have the transmission checked by
your dealer as soon as possible.
When the‘‘D’’indicator warns of a
possible problem with the
transmission, you will see a‘‘CHECK
TRANSMISSION’’message on the
multi-information display (see page
88).Shifting
To shift from Park to any position,
press firmly on the brake pedal, and
press the release button on the front
of the shift lever, then move the
lever. You cannot shift out of Park
when the ignition switch is in the
LOCK (0) or ACCESSORY (I)
position.
To shift from: Do this:
PtoRPress the brake pedal, and
press the shift lever release
button.
RtoP
NtoR
DtoSPress the shift lever release
button.
StoD
DtoN
NtoD
RtoNMove the shift lever.Park (P)－This position
mechanically locks the transmission.
Use Park whenever you are turning
off or starting the engine. To shift out
of Park, you must press on the brake
pedal and press the release button on
the shift lever. Make sure your foot is
off the accelerator pedal.
If you have done all of the above and
still cannot move the lever out of
Park, seeShift Lock Releaseon
page 446.
Automatic Transmission444

To avoid transmission damage, come
to a complete stop before shifting
into Park. You must also press the
release button to shift into park. The
shift lever must be in Park before
you can remove the key from the
ignition switch.
Reverse (R)－Press the brake
pedal and the release button on the
front of the shift lever to shift from
Park to reverse. To shift from reverse
to neutral, come to a complete stop,
and then shift. Press the release
button before shifting into reverse
from neutral.
Neutral (N)－Use neutral if you
need to restart a stalled engine, or if
it is necessary to stop briefly with the
engine idling. Shift to the Park
position if you need to leave your
vehicle for any reason. Press on the
brake pedal when you are moving
the shift lever from neutral to
another gear.Drive (D)－Use this position for
your normal driving. The
transmission automatically selects a
suitable gear (1 through 6) for your
speed and acceleration. You may
notice the transmission shifting up at
higher engine speeds when the
engine is cold. This helps the engine
warm up faster.S Position (S)－To shift into the S
position, press the release button on
the front of the shift lever, and move
the lever to S. This position is similar
to D, except only gears from first to
fifth are selected. (When shifting up
automatically, the vehicle speed is
higher than when in the D position.)
The S position keeps the
transmission from cycling between
fourth, fifth, and sixth gears in stop-
and-go driving.
With the shift lever in D or S, you
can also use the paddle shifters to
shift the transmission up or down.
Once you begin to use the paddle
shifters in S, the transmission will no
longer upshift or downshift
automatically. For more information
of driving with the paddle shifters,
see page 449.
CONTINUED
Automatic Transmission
445
Driving

Engine Speed Limiter
If you exceed the maximum speed
for the gear you are in, the engine
speed will enter into the
tachometer's red zone. If this occurs,
you may feel the engine cut in and
out. This is caused by a limiter in the
engine's computer controls. The
engine will run normally when you
reduce the rpm below the red zone.
Before downshifting, make sure the
engine will not go into the
tachometer's red zone.
The engine may cut in and out in R
position or depending on the road
condition even when the engine
speed is lower than the tachometer's
red zone. This is the engine's
computer working to protect the
transmission.Shift Lock Release
This allows you to move the shift
lever out of Park if the normal
method of pushing on the brake
pedal and pressing the release button
does not work.
1. Set the parking brake.
2. Remove the key from the ignition
switch.
3. Put a cloth on the edge of the shift
lock release slot cover. Use a small
flat-tip screwdriver or metal
fingernail file to carefully pry up
the edge of the cover and remove
it from the slot.
COVER
Automatic Transmission446

For example, if you check and fill
your tires in a warm area, then drive
in extremely cold weather, the tire
pressure will be lower than
measured and could be underinflated
and cause the low tire pressure/
TPMS indicator to come on. Or, if
you check and adjust your tire
pressure in cooler conditions, and
drive into extremely hot conditions,
the tire may become overinflated.
However, the low tire pressure/
TPMS indicator will not come on if
the tires are overinflated.
Refer to page 540 for tire inflation
guidelines.
If there is a problem with the TPMS,
this indicator begins to flash. It stops
flashing after approximately 1
minute, then stays on. You will also
see a‘‘CHECK TPMS SYSTEM’’
message on the multi-information
display (see page 88).Although your tire pressure is
monitored, you must manually check
the tire pressures monthly.
Each tire, including the spare, should
be checked monthly when the
vehicle is cold, and set to the
recommended inflation pressure as
specified on the vehicle placard and
in the owner's manual (see page
541).Tire Pressure Monitor
To select the tire pressure monitor,
press the INFO button several times
with the ignition switch in the ON
(II) position.
You will see the above display on the
multi-information display when all
tire pressures are normal.
Tire Pressure Monitoring System (TPMS)456

CMBS OFF ButtonTo switch the CMBS off, press the
CMBS OFF button on the dashboard
for about 1 second. When you do
this, a beeper sounds, a CMBS
indicator on the instrument panel
comes on, and a CMBS OFF
message appears on the multi-
information display. To switch the
system back on, press the button
again for about 1 second.When you turn the ignition switch to
the ON (II) position, the CMBS will
be in the previously selected on or off
setting.Automatic Shut Off
Any of the conditions below can
cause the CMBS to shut off. When
the system shuts off, the CMBS
indicator in the instrument panel
comes on, and a CHECK CMBS
SYSTEM message appears on the
multi-information display for about 5
seconds.
●
An abnormal tire condition is
detected (wrong tire size, flat tire,
etc.).
●
Extended off-road or mountainous
driving.
●
Driving your vehicle with the
parking brake applied.
●
Driving your vehicle in bad
weather (rain, fog, snow, etc.).
●
A dirty radar sensor cover on the
front grille.
CMBS OFF BUTTON
CONTINUED
Collision Mitigation Braking System™(CMBS™)
467
Driving

The CMBS will automatically switch
on again if the conditions that caused
it to switch off are improved.CMBS Indicator
This indicator comes on for several
seconds when you turn the ignition
switch to the ON (II) position. It also
comes on and stays on when you
turn the CMBS off by pressing the
CMBS OFF button.
To switch the CMBS back on, make
sure the vehicle is stopped and the
ignition switch is in the ON (II)
position, then press the CMBS OFF
button for about 1 second.The CMBS indicator normally comes
on under these conditions:
●
When you manually switch off the
system.
●
When the system shuts off
automatically.
●
When you drive in bad weather
(rain, snow, fog, etc.).
●
If anything covers the radar sensor
cover (dirt, mud, dry leaves, wet
snow, etc.).
CMBS INDICATOR
Collision Mitigation Braking System™(CMBS™)468