sensor Acura RL 2008 Owner's Guide

The radar sensor is located behind
the Acura emblem in the f ront grille.
If the emblem is covered with mud,
dirt, dead leaves, wet snow, etc., or if
you put a sticker on it, the CMBS will
automatically shut off, 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 emblem 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
radar sensor or the emblem. 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.
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. If the f ront emblem or the radar
sensor ever needs to be removed,
take your vehicle to a dealer.
Collision Mitigation Brake System (CMBS)
Radar Sensor
362
EMBLEM
BOLTS
(Do not tamper)
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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 ). 339
337
419 419
Collision Mitigation Brake System (CMBS)
Driving
363
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.
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2008 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.
Under-inf 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.
419
375
373
373
CONT INUED
Tire Pressure Monitoring System (TPMS)
Low Tire Pressure/
TPMS Indicator
Driving
371
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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.
419 436
375 Changing a T ire with T PMS
Tire Pressure Monitoring System (TPMS)
372
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The floor mats that came with your
vehicle hook over the f loor mat
anchors. This keeps the 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.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.
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.
Floor Mat s
416
HOOK
HOOK HOOK
Front
Front Front
DRIVER’S SIDE FLOOR MAT FRONT PASSENGER’S
SIDE FLOOR MATREAR PASSENGER’S FLOOR MAT
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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
473
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CONT INUED
Steering Wheel Buttons/.....................................
Switches .136
...................
Stereo Sound System .207
....................
Storing Your Vehicle .429
......................................
Sun Visors .192
Supplemental Restraint
................................
System .11,26
......................................
Servicing .36
.........................
SRS Indicator .34,63
...................
System Components .26
..................................
Synthetic Oil .400
.
Taking Care of the Unexpected .431
Technical Descriptions
......
DOT Tire Quality Grading .466
.....
Emissions Control Systems .472
Three Way Catalytic
.............................
Converters .474
.......................
Temperature Gauge .70
........
Temperature, Inside Sensor .206
....................
Temperature, Outside .73
..............
Tether Anchorage Points .51
Three Way Catalytic
.................................
Converters .474 Tilt/Telescopic Steering
.........................................
Wheel .147
....................................
Timing Belt .407
....................................
Tire Chains .424
.........
Tire, How to Change a Flat .436
Tire Pressure Monitoring System
..........................
(TPMS) .372,470
Monitoring Tire Pressure
..................................
Reading .419
...........
TPMS System Warning .371
...............................................
Tires .419
..............................
Air Pressure .421
........................................
Chains .424
.........................
Checking Wear .421
..........................
Compact Spare .435
......
DOT Tire Quality Grading .466
......................................
Inf lation .419
..................................
Inspection .421
.............................
Labeling .468,469
Low Tire Pressure
...........................
Indicator .67,371
..............
Michelin PAX System .426
......................
Pressure Monitor .373
........
Pressure Monitor System .371
...................................
Replacing .423
......................................
Rotating .422 ...........................................
Snow .424
............................
Specif ications .465
...................
Tools, Tire Changing .436
Torque Distribution Monitor
.................................
(SH-AWD) .356
Towing .....................................
A Trailer .379
....
Equipment and Accessories .380
.............................
Weight Limit .379
TPMS (Tire Pressure Monitoring ..................................
System) .371
Required Federal ............................
Explanation .470
.....................
Warning Message .375
.............................
Trailer Loading .379
......................
Trailer Towing Tips .382
Transmission
Checking Fluid Level, ..............................
Automatic .404
...........................
Fluid Selection .405
..............
Identif ication Number .462
.............
Shif ting the Automatic .349
.............................
Treadwear .422,435
.......................................
Trip Meter .72
Index
INDEX
T
IX
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