2009 Acura RL sensor

The radar sensor is located under
the Acura emblem in the f ront grille.
If the radar sensor cover is covered
with mud, dirt, dead leaves, wet
snow, etc., or if you put a sticker on
it, the CMBS will automatically shut
of f , and the CMBS indicator on the
instrument panel will come on. You
will also see a ‘‘CHECK CMBS
RADAR SENSOR’’ message on the
multi-inf ormation display f or about 5
seconds.Always keep the radar sensor cover
clean. If it gets dirty, clean it with
water or a mild detergent. Never use
chemical solvents or polishing
powder.Do not allow anything to impact the
radarsensorortheradarsensor
cover. If either of these parts
receives a strong impact, turn off the
system by pressing the CMBS of f
switch, and have your vehicle
checked by a dealer. If the f ront
grille ever needs to be repaired,
consult a dealer f irst.
If the radar sensor cover or the radar
sensor ever needs to be removed,
take your vehicle to a dealer.
There are three bolts on the sides of
the radar sensor. Do not tamper with
these bolts, or you may cause the
system to malf unction.
Radar Sensor
Collision Mitigation Brake System (CMBS)
420
RADAR SENSOR COVER
BOLTS
(Do not tamper)
2009 RL

The radar sensor may not always
scan as intended. Here are two
examples:Thetiresarenotcorrectly
maintained. Always make sure the
tire pressures are correct (see
page ), and that the tires are
the correct size and in good
condition (see Tires on page ). Your vehicle is tilted because of a
heavy load in the rear or from
modif ications to the suspension.
Do not overload your vehicle (see
Carrying Cargo on page ), and
do not make any modif ications to
the suspension (see Accessories
and Modif ications on page ). 395
393
480 480
Collision Mitigation Brake System (CMBS)
Driving
421
When the CMBS is on, the radar sensor
constantly scans f or vehicles ahead of
you. This means that driving on a road
with a f ew or no vehicles could cause a
CHECK CMBS RADAR SENSOR
message to appear on the multi-
inf ormation display. This is normal
and not a cause f or concern.
2009 RL

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/TPMS indicator in the
instrumental panel and the
appropriate tire position indicator on
thetirepressuremonitoronthe
multi-inf ormation display (see page)tocomeon. Refer to page for tire inflation
guidelines.
If there is a problem with the TPMS,
this indicator begins to f lash. It stops
flashing after approximately 1
minute, then stays on. You will also
see a ‘‘CHECK TPMS SYSTEM’’
message on the multi-inf ormation
display (see page ).
When the low tire pressure/TPMS
indicator is on, one or more of your
tires is signif icantly underinf lated.
The multi-inf ormation display also
shows a ‘‘CHECK TIRE PRESSURE’’
message (see page ). You should
stop and check your tires as soon as
possible, and inflate them to the
proper pressure as indicated on the
vehicle’s tire inf ormation placard.
Driving on a signif icantly under
inf lated tire causes the tire to
overheat and can lead to tire failure.
Underinf lation also reduces f uel
efficiency and tire tread life, and may
af f ect the vehicle’s handling and
stopping ability.
Becausetirepressurevariesby
temperature and other conditions,
the low tire pressure/TPMS
indicator may come on unexpectedly. 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 underinf lated
and cause the low tire pressure/
TPMS indicator to come on. Or, if
youcheckandadjustyourtire
pressure in cooler conditions, and
drive into extremely hot conditions,
the tire may become overinf lated.
However, the low tire pressure/
TPMS indicator will not come on if
thetiresareoverinflated.
431 431
480
433
CONT INUED
Low Tire Pressure/
TPMS Indicator
Tire Pressure Monitoring System (TPMS)
Driving
429
2009 RL

Although your tire pressure is
monitored, you must manually check
thetirepressuresmonthly.
Each tire, including the spare, should
be checked monthly when the
vehicle is cold, and set to the
recommended inf lation pressure as
specif ied on the vehicle placard and
intheowner’smanual(seepage).
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 (see page ).
If you think you can saf ely drive a
short distance to a service station,
proceed slowly to the station, then
inflate the tire to the recommended
pressure. If you have a f lat tire, the low tire
pressure/TPMS and tire monitor
indicators will come on. Replace the
indicated f lat tire with the compact
sparetire(seepage ).
After the flat tire is replaced with the
spare tire, the low tire pressure/
TPMS indicator stays on while
driving. Af ter several miles
(kilometers) driving, this indicator
begins to f lash, then stays on again.
You will also see a ‘‘CHECK TPMS
SYSTEM’’ message on the multi-
inf ormation display. This is normal;
the system cannot monitor the spare
tire pressure. Manually check the
sparetirepressuretobesureitis
correct.
This indicator and the warning
message on the multi-inf ormation
display will go of f , af ter several miles
(kilometers) driving, when the spare
tire is replaced with the specifiedregular tire equipped with the tire
pressure monitor sensor.
Never use a puncture-repairing agent
in a f lat tire. If used, you will have to
replace the tire pressure sensor.
Havetheflattirerepairedbyyour
dealer as soon as possible.
Each wheel is equipped with a tire
pressure sensor mounted inside the
tire behind the valve stem. You must
use TPMS specif ic wheels. It is
recommended that you always have
your tires serviced by your dealer or
a qualif ied technician.
480
494 495
Changing a T ire with T PMS
Tire Pressure Monitoring System (TPMS)
430
2009 RL

The floor mats that came with your
vehicle hook over the f loor mat
anchors. To lock each anchor, turn
theknobclockwise.Thiskeepsthe
f loor mats f rom sliding f orward
(possibly interf ering with the pedals),
or backwards (making the f ront
passenger’s weight sensors
inef f ective).
If you remove a f loor mat, make sure
tore-anchoritwhenyouputitback
in your vehicle.Make sure the rear f loor mats are
properly hooked to the f loor mat
anchors. Your vehicle is equipped
with front passenger’s seat weight
sensors. If the rear passenger’s f loor
mat is on the seat rail of the front
passenger’s seat, the sensors will
detect the decreased weight on the
seat, and they may not work properly.
If you use a non-Acura f loor mat,
make sure it f its properly and that it
canbeusedwiththefloormat
anchors. Do not put additional f loor
mats on top of the anchored mats.
Floor Mat s
Maint enance
477
DRIVER’S SIDE FLOOR MAT REAR PASSENGER’S FLOOR MAT
UnlockLock Unlock
Lock
ANCHORS ANCHOR
2009 RL

Store the jack and tools in the tool
case. Place the tool case in the f lat
tire.
Tighten the wheel nuts securely in
the same crisscross pattern. Have
the wheel nut torque checked at
the nearest automotive service
f acility.
Tighten the wheel nuts to: Place the flat tire face down in the
spare tire well.
Wrap the spacer cone and spare
tire wing bolt with cloth or paper,
and store them in the spare tire
well.Lower the trunk f loor, then close
the trunk lid.
Your vehicle’s original tire has a
tire pressure monitoring system
sensor. To replace a tire, ref er to
(see
page ).
14.
13.
15.16.
17.
18. 430
Changing a Flat Tire
Changing a T ire with T PMS
498
WING BOLTSPACER CONE
94 lbf·ft (127 N·m , 13 kgf·m)
Loose items can fly around the
interior in a crash and could
seriously injure the occupants.
Store the wheel, jack, and tools
securely before driving.
2009 RL

The exhaust emissions controls
include f our systems: PGM-FI,
ignition timing control, exhaust gas
recirculation, and three way catalytic
converter. These f our systems work
together to control the engine’s
combustion and minimize the
amount of HC, CO, and NOx that
come out the tailpipe. The exhaust
emissions control systems are
separate f rom the crankcase and
evaporative emissions control
systems.
The PGM-FI system uses sequential
multiport f uel injection.
It has three subsystems: air intake,
engine control, and f uel control. The
powertrain control module (PCM)
uses various sensors to determine
how much air is going into the
engine. It then controls how much
f uel to inject under all operating
conditions.This system constantly adjusts the
ignition timing, reducing the amount
of HC, CO, and NOx produced.
The exhaust gas recirculation (EGR)
system takes some of the exhaust
gas and routes it back into the intake
manif old. Adding exhaust gas to the
air/f uel mixture reduces the amount
of NOx produced when the f uel is
burned.
The emissions control systems are
designed and certif ied to work
together in reducing emissions to
levels that comply with the Clean Air
Act. To make sure the emissions
remain low, you should use only new
Acura replacement parts or their
equivalent f or repairs. Using lower
quality parts may increase the
emissions f rom your vehicle.
The emissions control systems are
covered by warranties separate from
the rest of your vehicle. Read your
warranty manual for more informa-
tion.
The three way catalytic converters
are in the exhaust system. Through
chemical reactions, they convert HC,
CO, and NOx in the engine’s exhaust
to carbon dioxide (CO ), nitrogen
(N ), and water vapor.
2
2
Exhaust Emissions Controls Replacement Parts
PGM-FI System Ignit ion T iming Cont rol Syst em
Exhaust Gas Recirculat ion (EGR)Syst em
Three Way Catalytic Converter
Emissions Cont rols
Technical Inf ormation
533
2009 RL

ÎÎÎ
.
Taking Care of the Unexpected .493
Technical Descriptions
......
DOT Tire Quality Grading .526
.....
Emissions Control Systems .532
Three Way Catalytic
.............................
Converters .534
.......................
Temperature Gauge .70
........
Temperature, Inside Sensor .212
....................
Temperature, Outside .73
..............
Tether Anchorage Points .51
.........................
Seat Ventilation .182
......................
Seats, Adjusting the .156
............................
Security System .315
.....
Sequential Sports Shif t Mode .411
..........................
Paddle Shif ters .409
...............................
Serial Number .522
...........................
Service Intervals .445
......
Service Manual, Purchasing .541
.........
Service Station Procedures .385
Super Handling-All Wheel Drive
...........................
(SH-AWD
) .413
..
Torque Distribution Monitor .413
.......................................
Indicator .66
...
Shif t Lever Position Indicators .405
........................
Shif t Lock Release .407
..............................
Side Airbags .11,32
How the Side Airbag of f ......................
Indicator Works .35
...
How Your Side Airbags Work .32
................
Side Curtain Airbags .11,34
How Your Side Curtain ..........................
Airbags Work .34
Side Marker Lights, Bulb .........................
Replacement in .471
.............................
Signaling Turns .140
.....................................
Snow Tires .487 ................................
Sound System .213
Spare Tire
......................................
Inf lating .494
............................
Specif ications .525
.....................
Specif ication Charts .524
................................
Speed Limiter .407
.......................................
Spotlights .200
..........
SRS, Additional Inf ormation .26
...
Additional Safety Precautions .37
..
How the SRS Indicator Works .34
How Your Airbags
............................
Work .29,32,34
........................
SRS Components .26
..................................
SRS Service .36
.............................
SRS Indicator .34,63
START (Ignition Switch
.....................................
Position) .152
.......................
Starting the Engine .403
...................
Auto Control Mode .403
In Cold Weather at High
..................................
Altitude .403
................
With a Dead Battery .500
........
Steam Coming f rom Engine .503
Steering Wheel
..............................
Adjustments .148
...........
Anti-thef t Column Lock .152 ......................
Position Memory .163
Steering Wheel Buttons/ .....................................
Switches .136
...................
Stereo Sound System .213
....................
Storing Your Vehicle .492
......................................
Sun Visors .196
Supplemental Restraint
................................
System .11,26
......................................
Servicing .36
.........................
SRS Indicator .34,63
...................
System Components .26
..................................
Synthetic Oil .459
Index
T
VIII
TM
2009 RL