2001 NISSAN XTERRA engine overheat

ever, you may use unleaded gasoline with
an octane rating as low as 85 AKI in high
altitude areas (over 4,000 ft [1,219 m]) such
as: Colorado, Montana, New Mexico, Utah,
Wyoming, northeastern Nevada, southern
Idaho, western South Dakota, western Ne-
braska, and the part of Texas which is
directly south of New Mexico.
Using unleaded gasoline with an octane
rating lower than stated above can cause
persistent, heavy ``spark knock.'' (``Spark
knock'' is a metallic rapping noise.) If
severe, this can lead to engine damage. If
you detect a persistent heavy spark
knock even when using gasoline of the
stated octane rating, or if you hear steady
spark knock while holding a steady speed
on level roads, have an authorized NIS-
SAN dealer correct the condition. Failure
to correct the condition is misuse of the
vehicle, for which NISSAN is not respon-
sible.
Incorrect ignition timing may result in spark
knock, after-run and/or overheating, which
may cause excessive fuel consumption or
engine damage. If any of the above symp-
toms are encountered, have your vehicle
checked at an authorized NISSAN dealer.However, now and then you may notice
light spark knock for a short time while
accelerating or driving up hills. This is
no cause for concern, because you get
the greatest fuel benefit when there is
light spark knock for a short time under
heavy engine load.
Technical and consumer information
10-5
ZX

4) Connect the tow harness connector
(SAE J1239) to your trailer.
5) Confirm proper vehicle and trailer
stop/turn lamp operation.
6) When towing is completed, disconnect
the tow harness from the trailer and the
vehicle. Store the tow harness in the
glove box. Reinstall the connector cap to
the vehicle harness.
If you need further assistance in wiring
a trailer to your NISSAN, contact an autho-
rized NISSAN dealer.
Always confirm proper vehicle and
trailer stop/turn lamp operation every
time the trailer light circuits are con-
nected for use.
Trailer brakes
If your trailer is equipped with a braking
system, make sure it conforms to Federal
and/or local regulations and that it is prop-
erly installed.
WARNING
Never connect a trailer brake system
directly to the vehicle brake system.
Pre-towing tips
OBe certain your vehicle maintains a level
position when a loaded and/or unloaded
trailer is hitched. Do not drive the vehicle
if it has an abnormal nose-up or nose-
down condition; check for improper
tongue load, overload, worn suspension
or other possible causes of either condi-
tion.
OAlways secure items in the trailer to
prevent load shift while driving.
OBe certain your outside mirrors conform
to all federal, state or local regulations. If
not, install any mirrors required for towing
before driving the vehicle.
Trailer towing tips
In order to gain skill and an understanding
of the vehicle's behavior, you should prac-
tice turning, stopping and backing up in an
area which is free from traffic. Steering,
stability and braking performance will be
somewhat different than under normal driv-
ing conditions.
OAlways secure items in the trailer to
prevent load shift while driving.
O
Avoid abrupt starts, acceleration or stops.
OAvoid sharp turns or lane changes.
OAlways drive your vehicle at a moderate
speed.
OAlways block the wheels on both vehicle
and trailer when parking. Parking on a
slope is not recommended; however, if
you must do so, and if your vehicle is
equipped with automatic transmission,
first block the wheels and apply the park-
ing brake, and then move the transmis-
sion shift selector lever into the P (Park)
position. If you move the shift lever to the
P (Park) position before blocking the
wheels and applying the parking brake,
transmission damage could occur.
OWhen going down a hill, shift into a lower
gear and use the engine braking effect.
When ascending a long grade, downshift
the transmission to a lower gear and
reduce speed to reduce chances of en-
gine overloading and/or overheating.
However, for long steep grades, do not
stay in 1st or 2nd gear when driving
above 35 MPH (56 km/h).
OIf the engine coolant rises to an ex-
tremely high temperature when the air
conditioning system is on, turn off the air
conditioner. Coolant heat can be addi-
10-24Technical and consumer information
ZX

tionally vented by opening the windows,
switching the fan control to high and
setting the temperature control to the
HOT position.
OTrailer towing requires more fuel than
normal circumstances.
OAvoid towing a trailer for your vehicle's
first 500 miles (805 km).
OHave your vehicle serviced more often
than at intervals specified in the recom-
mended Maintenance Schedule.
OWhen making a turn, your trailer wheels
will be closer to the inside of the turn than
your vehicle wheels. To compensate for
this, make a larger than normal turning
radius during the turn.
OCrosswinds and rough roads adversely
affect vehicle/trailer handling, possibly
causing vehicle sway. When being
passed by larger vehicles, be prepared
for possible changes in crosswinds that
could affect vehicle handling. If swaying
does occur, firmly grip the steering
wheel, steer straight ahead, and immedi-
ately (but gradually) reduce vehicle
speed. This combination helps to stabi-
lize the vehicle. Never increase speed.OBe careful when passing other vehicles.
Passing while towing a trailer requires
considerably more distance than normal
passing. Remember the length of the
trailer must also pass the other vehicle
before you can safely change lanes.
OTo maintain engine braking efficiency
and electrical charging performance, do
not use fifth gear (manual transmission)
or overdrive (automatic transmission).
OAvoid holding the brake pedal down too
long or too frequently. This could cause
the brakes to overheat, resulting in re-
duced braking efficiency.
When towing a trailer, change oil in the
transmission more frequently. For addi-
tional information see the ``Mainte-
nance'' section earlier in this manual.DOT (Department of Transportation) Quality
Grades: All passenger car tires must con-
form to Federal Safety Requirements in
addition to these grades.
Quality grades can be found where appli-
cable on the tire sidewall between tread
shoulder and maximum section width. For
example:
Treadwear 200 Traction AA Temperature A
Treadwear
Treadwear grade is a comparative rating
based on tire wear rate when tested under
controlled conditions on specified govern-
ment test courses. For example, a tire
graded 150 would wear one and a half
(1-1/2) times as well on the government
course as a tire graded 100. However, rela-
tive tire performance depends on actual
driving conditions, and may vary signifi-
cantly due to variations in driving habits,
service practices and differences in road
characteristics and climate.
Traction AA, A, B and C
The traction grades from highest to lowest
are AA, A, B, and C. Those grades repre-
sent the tire's ability to stop on wet pave-
UNIFORM TIRE QUALITY
GRADING
Technical and consumer information10-25
ZX

Engine oil and oil filter
recommendation ................................... 10-6
Engine oil viscosity ............................... 10-7
Outside mirror control ................................ 3-16
Overheat
If your vehicle overheats ...................... 6-10
Owner's manual order form ..................... 10-29
P
Parking
Parking brake check ............................. 8-24
Parking brake operation ....................... 5-14
Parking/parking on hills ........................ 5-22
Periodic maintenance schedules ................. 9-5
Power
Power door locks .................................... 3-3
Power steering fluid .............................. 8-14
Power steering system ......................... 5-23
Power windows..................................... 2-25
Precautions
Maintenance precautions ....................... 8-2
On-pavement and off-road driving
precautions ............................................. 5-3
Precautions on seat belt usage............ 1-14
Precautions when starting and driving ... 5-2
Push starting .............................................. 6-10R
Radio
Car phone or CB radio ......................... 4-38
FM-AM radio with cassette player and
compact disc (CD) player ..................... 4-17
FM-AM radio with compact disc (CD)
changer ................................................. 4-24
FM-AM radio with compact disc (CD)
player .................................................... 4-10
Steering wheel audio control switch ..... 4-37
Readiness for inspection maintenance
(I/M) test................................................... 10-27
Rear anti-lock brake warning light ............... 2-8
Rear door lock ............................................. 3-9
Rear seat ..................................................... 1-3
Rear window defogger switch ................... 2-17
Rear window wiper and washer
switches ..................................................... 2-16
Registering your vehicle in another
country ..................................................... 10-12
Remote keyless entry system
(See multi-remote control system) .............. 3-4
Reporting safety defects (USA) ............... 10-27
Roof rack with gear basket........................ 3-10
S
Safety
Child safety rear door lock ..................... 3-4
Reporting safety defects (USA) .......... 10-27Seat belt
Precautions on seat belt usage............ 1-14
Seat belt extenders .............................. 1-22
Seat belt maintenance.......................... 1-22
Seat belts.............................................. 1-14
Three-point type with retractor ............. 1-17
Two-point type without retractor
(rear center lap belt) ............................. 1-20
Seat belt warning light ................................. 2-9
Seats
Adjustment .............................................. 1-2
Rear seat ................................................ 1-3
Separate seats ....................................... 1-2
Service manual order form ...................... 10-29
Shifting
Manual transmission............................. 5-13
Skyroof ....................................................... 2-27
Spark plug replacement............................. 8-19
Speedometer ............................................... 2-3
Spotlights (See map light) ......................... 2-30
SRS warning label ..................................... 1-12
Starting
Before starting the engine ...................... 5-8
Jump starting .......................................... 6-8
Precautions when starting and driving ... 5-2
Push starting......................................... 6-10
Starting the engine ................................. 5-8
Steering
Power steering fluid .............................. 8-14
Power steering system ......................... 5-23
Tilting steering wheel ............................ 3-14
11-4
ZX