2003 INFINITI G35 radiator

air into the passenger compartment. The indi-
cator light on the button will come on.
Air recirculation Push the air recirculation button to recir-
culate interior air inside the vehicle. The indi-
cator light on the button will come on.
The air recirculation button will not be acti-
vated when the air conditioner is in DEF mode.
Air flow control (MODE) Pushing the MODE button selects the air outlet
to:
: Air flows from center and side ventila-
tors.
: Air flows from center and side ventila-
tors and foot outlets.
: Air flows mainly from foot outlets.
: Air flows from defroster and foot out-
lets.
To turn the system off Push the OFF button.
DUAL ZONE BUTTON (if so
equipped) You can set the temperature of the driver and front passenger sides individually.
Pushing the DUAL zone button changes the
setting position as follows:
Driver/Passenger ! Driver ! Passenger
If selecting the Driver/Passenger position
again after the temperature is individually set,
the display will show the temperature set for
the driver side.
AMBIENT TEMPERATURE The outside ambient temperature will be
shown on the center display.
The ambient temperature sensor is located in
front of the radiator. The sensor may be af-
fected by road or engine heat, wind direction
and other driving conditions. The display may
differ from the actual outside temperature or
the temperature displayed on various signs or
billboards.
OPERATING TIPS When the engine coolant temperature and
outside air temperature are low, the air flow
from the foot outlets may not operate for a
maximum of 150 seconds. However, this is not
a malfunction. After the coolant temperature
warms up, the air flow from the foot outlets will
operate normally. The sensor on the instrument panel helps
maintain a constant temperature; do not put
anything on or around this sensor.
IN-CABIN MICROFILTER The air conditioning system is equipped with a
in-cabin microfilter which collects dirt, pollen,
dust, etc. To make sure air conditioner heats,
defogs, and ventilates efficiently, replace the
filter in accordance with the maintenance
schedule in this manual. To replace the filter,
contact your INFINITI retailer.
The filter should be replaced if air flow
decreases significantly or if windows fog HA1011
Heater, air conditioner and audio systems
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FREEING A FROZEN DOOR LOCK To prevent a door lock from freezing, apply
de-icer or glycerin to it through the key hole. If
the lock becomes frozen, heat the key before
inserting it into the key hole.
ANTI-FREEZE In the winter when it is anticipated that the
temperature will drop below 32ÉF (0ÉC), check
anti-freeze to assure proper winter protection.
For additional information, see ªEngine Cool-
ing Systemº in the ª8. Do-it-yourselfº section.
BATTERY If the battery is not fully charged during ex-
tremely cold weather conditions, the battery
fluid may freeze and damage the battery. To
maintain maximum efficiency, the battery
should be checked regularly. For additional
information, see ªBatteryº in the ª8. Do-it-
yourselfº section.
DRAINING OF COOLANT WATER If the vehicle is to be left outside without
anti-freeze, drain the cooling system by open-
ing the drain plug located under the radiator.
Refill before operating the vehicle. See ªEn-
gine cooling systemº in the ª8. Do-it-yourselfº
section for changing engine coolant. TIRE EQUIPMENT 1. SUMMER tires are of a tread design to
provide superior performance on dry pave-
ment. However, the performance of these
tires will be substantially reduced in snowy
and icy conditions. If you operate your
vehicle on snowy or icy roads, INFINITI
recommends the use of MUD & SNOW or
ALL SEASON tires on all four wheels.
Please consult your INFINITI retailer for the
tire type, size, speed rating and availability
information.
2. For additional traction on icy roads, studded
tires may be used. However, some prov-
inces and states prohibit their use. Check
local, state and provincial laws before in-
stalling studded tires.
Skid and traction capabilities of studded
snow tires, on wet or dry surfaces, may be
poorer than that of non-studded snow tires.
3. Tire chains may be used if desired. Make
sure they are of proper size for the tires on
your vehicle and are installed according to
the chain manufacturer's suggestions. Use
of tire chains may be prohibited according
to location. Check the local laws before
installing tire chains. When installing tire
chains, make sure they are of proper size
for the tires on your vehicle and are in- stalled according to the chain manufactur-
er's suggestions. Use only SAE Class S
chains. Class ªSº chains are used on ve-
hicles with restricted tire to vehicle clear-
ance. Vehicles that can use Class ªSº
chains are designed to meet the SAE stan-
dard minimum clearances between the tire
and the closest vehicle suspension or body
component required to accommodate the
use of a winter traction device (tire chains
or cables). The minimum clearances are
determined using the factory equipped tire
size. Other types may damage your ve-
hicle. Use chain tensioners when recom-
mended by the tire chain manufacturer to
ensure a tight fit. Loose end links of the tire
chain must be secured or removed to pre-
vent the possibility of whipping action dam-
age to the fenders or underbody. If pos-
sible, avoid fully loading your vehicle when
using tire chains. In addition, drive at a
reduced speed. Otherwise, your vehicle
may be damaged and/or vehicle handling
and performance may be adversely af-
fected.
Never install tire chains on a T-type spare
tire. Do not use tire chains on dry roads.
SPECIAL WINTER EQUIPMENT It is recommended that the following items beCOLD WEATHER DRIVING
Starting and driving
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WARNINGO Do not continue to drive if your ve-
hicle overheats. Doing so could
cause a vehicle fire.
O To avoid the danger of being scalded,
never remove the radiator cap while
the engine is still hot. When the radia-
tor cap is removed, pressurized hot
water will spurt out, possibly causing
serious injury.
O Do not open the hood if steam is
coming out.
If your vehicle is overheating (indicated by an
extremely high temperature gauge reading), or
if you feel a lack of engine power, detect
abnormal noise, etc., take the following steps:
1. Move the vehicle safely off the road, apply
the parking brake and move the shift lever
to the N (Neutral) position (automatic trans-
mission to the P (Park) position).
Do not stop the engine.
2. Turn off the air conditioner switch. Open all
the windows, move the heater or air condi- tioner temperature control to maximum hot
and fan control to high speed.
3. If engine overheating is caused by climbing
a long hill on a hot day, run the engine at a
fast idle (approximately 1,500 rpm) until the
temperature gauge indication returns to
normal.
4. Get out of the vehicle. Look and listen for
steam or coolant escaping from the radiator
before opening the hood. Wait until no
steam or coolant can be seen before pro-
ceeding.
5. Open the engine hood.
WARNING If steam or water is coming from the
engine, stand clear to prevent getting
burned.
6. Visually check if the cooling fan is running.
The radiator hoses and radiator should not
leak water.
If coolant is leaking or the cooling fan does
not run, stop the engine. WARNING O Be careful not to allow your hands,
hair, jewelry or clothing to come into
contact with, or to get caught in the
cooling fan, or drive belt.
O The engine cooling fan can start at
any time when the coolant tempera-
ture is high.
7. After the engine cools down, check the
coolant level in the reservoir tank with the
engine running. Add coolant to the reservoir
tank if necessary. Have your vehicle re-
paired at the nearest INFINITI retailer.
If needed, Roadside Assistance is available.
Please see your Warranty Information Booklet
or Roadside Assistance I.D. Card for the toll-
free number to call (U.S.) or Warranty & Road-
side assistance information booklet (Canada).IF YOUR VEHICLE OVERHEATS
6-10 In case of emergency
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1. Fuse/fusible link holder
2. Battery
3. Engine oil filler cap
4. Brake fluid reservoir
5. Clutch fluid reservoir
6. Power steering fluid reservoir
7. Engine coolant reservoir
8. Windshield washer fluid reservoir
9. Radiator filler cap
10. Engine oil dipstick
11. Air cleaner
SDI1485ENGINE COMPARTMENT CHECK
LOCATIONS
8-4 Do-it-yourself
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The engine cooling system is filled at the
factory with a high-quality, year-round, anti-
freeze coolant solution. The anti-freeze solu-
tion contains rust and corrosion inhibitors,
therefore additional cooling system additives
are not necessary.
CAUTIONWhen adding or replacing coolant, be
sure to use only a genuine NISSAN anti-
freeze coolant or equivalent with the
proper mixture ratio of 50% anti-freeze
and 50% demineralized water/distilled
water. The use of other types of coolant
solutions may damage your engine
cooling system. Outside temperature
down to
Anti-
freeze Deminer-
alized
water/
distilled
waterÉC ÉF
þ35 þ30 50% 50% WARNING O Never remove the radiator cap when
the engine is hot. Serious burns
could be caused by high pressure
fluid escaping from the radiator. Wait
until the engine and radiator cool
down.
O See ªIf your vehicle overheatsº in the
ª6. In case of emergencyº section.
O The radiator is equipped with a pres-
sure cap. To prevent engine damage,
use only a genuine NISSAN radiator
cap.
CHECKING ENGINE COOLANT
LEVEL Check the coolant level in the reservoir tank
when the engine is cold. If the coolant level is
below MIN, add coolant up to the MAX level. If
the reservoir tank is empty, check the coolant
level in the radiator when the engine is cold.
If there is insufficient coolant in the radiator, fill
the radiator with coolant up to the filler opening
and also add it to the reservoir tank up to the
MAX level.
If the engine cooling system frequently
requires coolant, have it checked by your
INFINITI retailer. SDI1385
ENGINE COOLING SYSTEM
Do-it-yourself
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CHANGING ENGINE COOLANT O Major cooling system repairs should be
performed by your INFINITI retailer. The
service procedures can be found in the
appropriate INFINITI Service Manual. O Improper servicing can result in reduced
heater performance and engine overheat-
ing.
WARNING O To avoid being scalded, never change
the coolant when the engine is hot.
O Never remove the radiator cap when
the engine is hot. Serious burns
could be caused by high pressure
fluid escaping from the radiator.
O Avoid direct skin contact with used
coolant. If skin contact is made, wash
thoroughly with soap or hand cleaner
as soon as possible.
O Keep coolant out of reach of children
and pets.
1. Open radiator drain plug at the bottom of
radiator, and remove radiator filler cap.
O Be careful not to allow coolant to con-
tact drive belts.
O Waste coolant must be disposed of
properly. Check your local regulations.
2. Close the radiator drain plug securely after
the coolant is drained. 3. Fill the radiator slowly with the proper mix-
ture of anti-freeze solution and demineral-
ized water/distilled water. Fill the reservoir
tank up to the MAX level. Then install the
radiator filler cap.
4. Start the engine and warm it up until it
reaches normal operating temperature.
Then race the engine 2 or 3 times under no
load. Watch the engine coolant tempera-
ture gauge for signs of overheating.
5. Stop the engine. After it completely cools
down, refill the radiator up to the filler
opening. Fill the reservoir tank up to the
MAX level. Check the drain plug for any
sign of leakage.
6. Recheck the coolant level after the vehicle
has been driven for a day.SDI0114
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Seat belts: Check that all parts of the seat belt
system (For example, buckles, anchors, ad-
justers and retractors) operate properly and
smoothly, and are installed securely. Check
the belt webbing for cuts, fraying, wear or
damage.
Accelerator pedal: Check the pedal for
smooth operation and make sure the pedal
does not catch or require uneven effort. Keep
the floor mat away from the pedal.
Clutch pedal*: Make sure the pedal operates
smoothly and check that it has the proper free
play.
Brakes: Check that the brakes do not pull the
vehicle to one side when applied.
Brake pedal*: Check the pedal for smooth
operation and make sure it has the proper
distance under it when depressed fully. Check
the brake booster function. Be sure to keep the
floor mat away from the pedal.
Parking brake*: Check that the lever has the
proper travel and confirm that your vehicle is
held securely on a fairly steep hill with only the
parking brake applied.
Automatic transmission P (Park) mecha-
nism: On a fairly steep hill check that your
vehicle is held securely with the selector lever in the P (Park) position without applying any
brakes.
Under the hood and vehicle The maintenance items listed here should be
checked periodically (For example, each time
you check the engine oil or refuel).
Windshield washer fluid*: Check that there
is adequate fluid in the tank.
Engine coolant level*: Check the coolant
level when the engine is cold.
Radiator and hoses: Check the front of the
radiator and clean off any dirt, insects, leaves,
etc., that may have accumulated. Make sure
the hoses have no cracks, deformation, dete-
rioration or loose connections.
Brake and clutch fluid level*: Make sure that
the brake and clutch fluid level is between the
MAX and MIN lines on the reservoir.
Battery*: Check the fluid level in each cell.
It should be between the MAX and MIN lines.
Vehicles operated in high temperatures or
under severe conditions require frequent
checks of the battery fluid level.
Engine drive belts*: Make sure that no belt is
frayed, worn, cracked or oily.
Engine oil level*: Check the level after park- ing the vehicle on a level spot and turning off
the engine. (Wait at least 10 minutes for the oil
to drain back into the oil pan.)
Power steering fluid level* and lines: Check
the level when the fluid is cold and the engine
is turned off. Check the lines for proper attach-
ment, leaks, cracks, etc.
Exhaust system: Make sure there are no
loose supports, cracks or holes. If the sound of
the exhaust seems unusual or there is a smell
of exhaust fumes, immediately locate the
trouble and correct it. See ªPrecautions when
starting and drivingº in the ª5. Starting and
drivingº section for exhaust gas (Carbon mon-
oxide).
Underbody: The underbody is frequently ex-
posed to corrosive substances such as those
used on icy roads or to control dust. It is very
important to remove these substances, other-
wise rust will form on the floor pan, frame, fuel
lines and around the exhaust system. At the
end of winter, the underbody should be thor-
oughly flushed with plain water, being careful
to clean those areas where mud and dirt may
accumulate. For additional information, see
ªCleaning exteriorº in the ª7. Appearance and
careº section.
Fluid leaks: Check under the vehicle for fuel,
oil, water or other fluid leaks after the vehicle
9-4 Maintenance
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