2008 HONDA RIDGELINE sensor

Theclimatecontrolsystemhastwo
sensors. A sunlight sensor is in the
top of the dashboard, and a
temperature sensor is under the
steering column. Do not cover the
sensors or spill any liquid on them.
On RTS, RTL, and Canadian EXLmodels
Climat e Cont rol Sensors
Sunlight and T emperature
Sensors
134
SUNLIGHT SENSOR TEMPERATURE SENSOR
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2008 Ridgeline

The direction and center position
icons come on when you turn the
ignition switch to the ON (II)
position. The system then begins to
check the vehicle direction and
illuminates the appropriate icon(s).The compass can be af f ected by
driving near power lines or stations,
across bridges, through tunnels,
over railroad crossings, past large
vehicles, or driving near large
objects that cause magnetic
interference. It can also be affected
by accessories such as antennas and
roof racks that are mounted by
magnets.
Your vehicle has a compass in the
rear view mirror. The compass
indicates the vehicle direction with
illuminated letters; N (north), S
(south), W (west), and E (east). The
center blue icon in the compass is
always on. It serves as a ref erence
point.
To turn the compass on or of f , press
the compass button on the back of
the rear view mirror.The compass mirror has a light
sensor behind the right side of the
rear view mirror. Make sure the
extended sun visor or an accessory is
not covering the sensor.
If equipped
Compass Function
Compass
172
COMPASS
BUTTON
CENTER ICON
REAR VIEW MIRROR
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2008 Ridgeline

Store or secure all items that could
be thrown around and hurt
someone during a crash.Distribute cargo evenly on the
f loor in the In-Bed Trunk, placing
the heaviest items on the bottom
and as far forward as possible. Tie
down items that could be thrown
during a crash or sudden stop.
Make sure the In-Bed Trunk lid is
closed securely bef ore driving.
Be sure the total weight of the
items in the In-Bed Trunk does not
exceed 300 lbs (136 kg).
If you use an accessory roof rack,
the roof rack weight limit may be
lower. Ref er to the inf ormation that
came with your roof rack.
Be sure items placed on the f loor
behind the f ront seats cannot roll
underneath and interf ere with the
proper operation of the seats, the
sensors under the seats, or the
driver’s ability to operate the
pedals.
Keep the glove box closed while
driving. If it is open, a passenger
could injure their knees during a
crash or sudden stop.
If youfoldtherearseatsup,tie
down items that could be thrown
about the vehicle during a crash or
sudden stop. Also, keep all cargo
below the bottom of the windows.
If it is higher, it could interf ere
with the proper operation of the
side curtain airbags.
Distribute cargo evenly on the
floor of the cargo area with the
rear seats f olded up, placing the
heaviest items on the bottom and
as far forward as possible. Tie
down items that could be thrown
about the vehicle during a crash or
sudden stop. If you carry any items on a roof
rack,besurethetotalweightof
the rack and the items does not
exceed 110 lbs (50 kg).
Carrying Items in the Passenger
Compartment
Carrying Cargo in the In-Bed
T runk or on a Roof Rack
Carrying Cargo
Bef ore Driving
193
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2008 Ridgeline

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.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.
If you think you can saf ely drive a
short distance to a service station,
proceed slowly, and inf late the tire to
the recommended pressure shown
on the driver’s doorjamb.
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 cannot make the low tire
pressure indicator go out af ter
inf lating the tires to the specif ied
values, have your dealer check the
system as soon as possible.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 indicator may
come on unexpectedly.
Each tire has its own pressure
sensor (not including the spare tire).
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 and the appropriate tire on
thetirepressuremonitortocomeon.
276
Tire Pressure Monitoring System (TPMS)
Low Tire Pressure
Indicator
208
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2008 Ridgeline

As required by the FCC:This device complies with Part 15 of theFCC rules. Operation is subject to thef ollowing two conditions: (1) This devicemay not cause harmf ul interf erence, and(2) this device must accept anyinterf erence received, includinginterf erence that may cause undesiredoperation.
Changes or modif ications not expresslyapproved by the party responsible f orcompliance could void the user’sauthority to operate the equipment.
This device complies with IndustryCanada Standard RSS-210.Operation is subject to the f ollowing twoconditions: (1) this device may not causeinterf erence, and (2) this device mustaccept any interf erence that may causeundesired operation of the device.
If you have a f lat tire, the low tire
pressure and tire monitor indicators
will come on. Replace the indicated
flat tire with the compact spare tire
(see page ).
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.
After you replace the flat tire with
the spare, the TPMS indicator stays
on.Thisisnormal;thesystemisnot
monitoring the spare tire pressure.
Manually check the spare tire
pressure to be sure it is correct. The low tire pressure indicator or
the TPMS indicator will go of f when
you replace the spare tire with the
specif ied regular 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.
277
Tire Pressure Monitoring System (TPMS)
Changing a T ire with T PMS
210
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2008 Ridgeline

If your seat belts get dirty, use a sof t
brush with a mixture of mild soap
and warm water to clean them. Do
not use bleach, dye, or cleaning
solvents. Let the belts air-dry bef ore
you use the vehicle.
Dirt build-up in the loops of the seat
belt anchors can cause the belts to
retract slowly. Wipe the insides of
the loops with a clean cloth
dampened in mild soap and warm
water or isopropyl alcohol.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.A non-Honda f loor mat may not f it
your vehicle properly. This could
prevent the proper operation of the
f olding rear seats and the passenger’s
seat weight sensors. We recommend
using genuine Honda f loor mats. Do
not put additional f loor mats on top
of the anchored mats.
Cleaning the Seat Belts Floor Mats
Cleaning the Seat Belts, Floor Mats
Maint enance
263
LOOP
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2008 Ridgeline

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.
For convenience, the recommended
tire sizes and cold tire pressures are
on a label on the driver’s doorjamb.
The following chart shows the
recommended cold tire pressures f or
most normal and high-speed driving
conditions.
For additional inf ormation about
your tires, see page .Every time you check inf lation, you
should also examine the tires f or
damage, f oreign objects, and wear.
Youshouldlookfor:
Bumps or bulges in the tread or
side of the tire. Replace the tire if
youfindeitherof theseconditions.
Cuts, splits, or cracks in the side
of the tire. Replace the tire if you
can see f abric or cord.
Excessive tread wear. Your tires have wear indicators
molded into the tread. When the
tread wears down, you will see a 1/2
inch (12.7 mm) wide band across the
tread. This shows there is less than
1/16 inch (1.6 mm) of tread lef t on
the tire.
A tire this worn gives very little
traction on wet roads. You should
replace the tire if you can see three
or more tread wear indicators.
308
Tire Size
Compact Spare Cold Tire Pressure
Front/Rear:
Tires
Recommended Tire Pressures Tire Inspection
268
INDICATOR LOCATION MARKS
TREAD WEAR INDICATORS
T165/90R17 105M P245/65R17 105T 32 psi (220 kPa ,
2.2 kgf/cm
)
60 psi (420 kPa , 4.2 kgf/cm
)
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2008 Ridgeline

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 three way catalytic converter is
in the exhaust system. Through
chemical reactions, it converts HC,
CO, and NOx in the engine’s exhaust
to carbon dioxide (CO ), nitrogen
(N ), and water vapor.
The emissions control systems are
covered by warranties separate from
the rest of your vehicle. Read your
warranty manual for more informa-
tion.
The emissions control systems are
designed and certif ied to work to-
gether in reducing emissions to
levels that comply with the Clean Air
Act. To make sure the emissions
remain low, you should use only new
Honda replacement parts or their
equivalent f or repairs. Using lower
qualitypartsmayincreasethe
emissions f rom your vehicle.
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
313
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2008 Ridgeline