2001 NISSAN SENTRA check engine

fied pressure if necessary. Check carefully
for damage, cuts or excessive wear.
Wheel nuts* ÐWhen checking the tires,
make sure no wheel nuts are missing, and
check for any loose wheel nuts. Tighten if
necessary.
Tire rotation* ÐTires should be rotated
every 7,500 miles (12,000 km).
Wheel alignment and balance ÐIf the
vehicle should pull to either side while driv-
ing on a straight and level road, or if you
detect uneven or abnormal tire wear, there
may be a need for a wheel alignment.
If the steering wheel or seat vibrates at
normal highway speeds, wheel balancing
may be needed.
Windshield wiper blades* ÐCheck for
cracks or wear if they do not wipe properly.
Doors and engine hood ÐCheck that all
doors and the hood operate properly. Also
ensure that all latches lock securely. Lubri-
cate hinges, latches, rollers and links if
necessary. Make sure the secondary latch
keeps the hood from opening when the
primary latch is released.
When driving in areas that use road salt orother corrosive materials, check lubrication
frequently.
Lights* ÐMake sure the headlamps, stop-
lights, tail lights, turn signal lights, and other
lights are all operating properly and installed
securely. Also check headlamp aim.
INTERIOR MAINTENANCE
The maintenance items listed here should
be checked on a regular basis, such as
when performing periodic maintenance,
cleaning the vehicle, etc.
Additional information on the following
items with an ``*'' is found in the ``Do-it-
yourself'' section of this manual.
Warning lights and chimes ÐMake sure
all warning lights and chimes are operating
properly.
Windshield wiper and washer* ÐCheck
that the wipers and washer operate properly
and that the wipers do not streak.
Windshield defroster ÐCheck that the air
comes out of the defroster outlets properly
and in sufficient quantity when operating the
heater or air conditioner.
Steering wheel ÐCheck for changes inthe steering conditions, such as excessive
freeplay, hard steering or strange noises.
Seats ÐCheck seat position controls such
as seat adjusters, seatback recliner, etc. to
ensure they operate smoothly and all
latches lock securely in every position.
Check that the head restraints move up and
down smoothly and the locks hold securely
in all latched positions.
Seat belts ÐCheck that all parts of the seat
belt system (For example buckles, anchors,
adjusters and retractors) operate properly
and smoothly, and are installed securely.
Check the belt webbing for cuts, fraying,
wear or damage.
Accelerator pedal ÐCheck 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* ÐMake sure the pedal
operates smoothly and check that it has the
proper free travel.
Brakes ÐCheck that the brakes do not pull
the vehicle to one side when applied.
Brake pedal and booster* ÐCheck the
pedal for smooth operation and make sure it
Maintenance
9-3
ZX

has the proper distance under it when de-
pressed fully. Check the brake booster func-
tion. Be certain to keep the floor mat away
from the pedal.
Parking brake* ÐCheck 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 position''
mechanism ÐOn a fairly steep hill check
that your vehicle is held securely with the
selector lever in the P (Park) position with-
out applying any brakes.
Under the hood and vehicle
The maintenance items listed here should
be checked periodically, such as each time
you check the engine oil or refuel.
Additional information on the following
items with an ``*'' is found in the ``Do-it-
yourself'' section of this manual.
Windshield washer fluid* ÐCheck for
adequate fluid in the tank.
Engine oil level* ÐCheck the level after
parking the vehicle on a level surface, with
the engine off. Wait a few minutes for the oil
to drain back into the oil pan.
Brake and (if so equipped) clutch fluid
levels* ÐMake sure the brake and clutch
fluid level is between the MIN and MAX lines
on each reservoir.
Power steering fluid level* and lines Ð
Check the level when the fluid is cold, with
the engine off. Check the lines for proper
attachment, leaks, cracks, etc.
Automatic transmission fluid level* Ð
Check the level after putting the shift selec-
tor lever in P (Park) with the engine idling at
operating temperature.
Engine coolant level* ÐCheck the cool-
ant level when the engine is cold.
Radiator and hoses ÐCheck the front of
the radiator and clean off any dirt, insects,
leaves, etc., that may have accumulated.
Make sure the hoses have no cracks, de-
formation, rot or loose connections.
Engine drive belts* ÐMake sure the drive
belts are not frayed, worn, cracked or oily.
Battery* ÐCheck the fluid level in each
cell.
Exhaust system ÐMake sure there are no
cracks, holes, loose joints or supports. If the
sound of the exhaust seems unusual orthere is a smell of exhaust fumes, immedi-
ately have the exhaust system inspected by
an authorized NISSAN dealer. See the car-
bon monoxide warning in the ``Starting and
driving'' section of this manual.
Underbody ÐThe underbody is frequently
exposed to corrosive substances such as
those used on icy roads or to control dust. It
is very important to remove these sub-
stances, from the underbody, otherwise rust
may form on the floor pan, frame, fuel lines
and exhaust system. At the end of winter,
the underbody should be thoroughly flushed
with plain water, especially those areas
where mud and dirt may have accumulated.
See the ``Appearance and care'' section of
this manual.
Fluid leaks ÐCheck under the vehicle for
fuel, oil, water or other fluid leaks after the
vehicle has been parked for awhile. Water
dripping from the air conditioner after use is
normal. If you should notice any leaks or if
gasoline fumes are evident, check for the
cause and have it corrected immediately by
an authorized NISSAN dealer.
9-4Maintenance
ZX

EXPLANATION OF MAINTE-
NANCE ITEMS
Additional information on the following
items with an ``*'' is found in the ``Do-it-
yourself'' section of this manual.
Emission control system maintenance
Drive belts* ÐCheck drive belts for wear,
fraying or cracking and also for proper ten-
sion. Replace any damaged drive belts.
Air cleaner filter ÐUnder normal driving
conditions, the air cleaner filter should be
replaced in accordance with the mainte-
nance schedule. However, driving the ve-
hicle in dusty areas may cause rapid clog-
ging of the element. Consequently, the
element may have to be replaced more
frequently.
EVAP vapor lines ÐCheck vapor lines and
connections for leaks, looseness or deteriora-
tion. If leaks are found, replace them.
Fuel lines ÐCheck the fuel hoses, piping
and connections for leaks, looseness or
deterioration. Replace any damaged parts.
Engine coolant* ÐDrain and flush the
cooling system.Engine oil & oil filter* ÐUnder normal
driving conditions, the engine oil and oil filter
should be replaced in accordance with the
maintenance schedule. However, under se-
vere driving conditions, they may have to be
replaced more frequently.
Spark plugs* ÐReplace with new plugs
having the correct heat range.
Intake & exhaust valve clearance Ð
Check and adjust the valve clearance.
Chassis and body maintenance
Brake lines & cables ÐCheck the brake
lines and hoses (including brake booster
vacuum hoses, connections & check valve)
and parking brake cables for proper attach-
ment, leaks, cracks, chafing, abrasion, de-
terioration, etc.
Brake pads, rotors, drums & linings Ð
Check these and the other brake compo-
nents for wear, deterioration and leaks. Un-
der severe driving conditions, they may
have to be inspected more frequently.
Manual & automatic transmission fluid*
ÐCheck the fluid level and visually inspect
for signs of leakage. Under severe drivingconditions, the fluid should be replaced at
the specified interval.
Steering gear & linkage, axle & suspen-
sion parts, and drive shaft boots Ð
Check for damage, looseness and leakage
of oil or grease. Under severe driving con-
ditions, inspection should be performed
more frequently.
Exhaust system ÐVisually check the ex-
haust pipes, muffler, and hangers for proper
attachment, leaks, cracks, chafing, abra-
sion, deterioration, etc. Under severe driv-
ing conditions, inspection should be per-
formed more frequently.
Supplemental air bag and supplemental
side air bag (if so equipped) system Ð
Check the supplemental air bag system(s)
components for proper attachment, damage,
deformities, cracks, rust, etc. Work around and
on the supplemental air bag system should be
done by an authorized NISSAN dealer.
9-10Maintenance
ZX

of at least 87 AKI (Anti-Knock Index). How-
ever, you may use unleaded gasoline with
an octane rating as low as 85 AKI (Anti-
Knock Index) in high altitude areas (over
4,000 ft [1,219 m]) such as: Colorado, Mon-
tana, New Mexico, Utah, Wyoming, north-
eastern Nevada, southern Idaho, western
South Dakota, western Nebraska, 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
NISSAN dealer correct the condition.
Failure to correct the condition is misuse
of the vehicle, for which NISSAN is not
responsible.
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 or
other competent service facility.
However, now and then you may notice
light spark knock for a short time while
accelerating or driving up hills. This is
not a cause for concern, because you
get the greatest fuel benefit when there
is light spark knock for a short time
under heavy engine load.
10-4Technical and consumer information
ZX

ENGINE
ModelQG18DE SR20DE
Type Gasoline, 4-cycle, DOHC Gasoline, 4-cycle, DOHC
Cylinder arrangement 4-cylinder in-line 4-cylinder in-line
Bore ý Stroke in (mm) 3.150 ý 3.465 (80.0 ý 88.0) 3.386 ý 3.386 (86.0 ý 86.0)
Displacement cu in (cm
3) 107.94 (1,769) 121.92 (1,998)
Firing order1-3-4-2 1-3-4-2
Idle speed rpm
See the ``Emission Control label'' on the underside of the hood. Ignition timing degree (B.T.D.C.) at idle speed
degree/rpm
CO percentage at idle speed
[No air] %
Platinum-tipped type Platinum-tipped type Conventional type
Spark plug Hot PLFR4A-11 *1 Ð Ð
Standard PLFR5A-11 *1 PFR5G-11 *1 BKR5E *1
Cold PLFR6A-11 *1 PFR6G-11 *1, PFR7G-11 *1 BKR6E *1, BKR7E *1
Camshaft operation Timing chain Timing chain
Spark plug gap (Nominal) in (mm) 0.043 (1.1) 0.043 (1.1) 0.031 to 0.035 (0.8 to 0.9)
Generator belt size
Width ý Length in (mm)0.843 x 32.28, (21.4 x 820)
0.843 x 44.09, (21.4 x 1,120)*10.559 x 32.68, (14.2 x 830)
0.843 x 40.75, (21.4 x 1,035)*1
*1: Always check with the Parts Department at an authorized NISSAN dealer for the latest parts information.
*2: With air conditioner
The spark ignition system of this vehicle meets all requirements of the Canadian Interference-Causing Equipment Regulations.
SPECIFICATIONS
10-8Technical and consumer information
ZX

11 Index
A
Air bag (See supplemental restraint
system) ........................................................ 1-6
Air bag warning light .......................... 1-16, 2-9
Air cleaner housing filter ............................ 8-21
Air conditioner
Air conditioner operation ........................ 4-5
Air conditioner specification label ....... 10-12
Air conditioner system refrigerant and
lubrication recommendations ................ 10-7
Heater and air conditioner controls ........ 4-3
Servicing air conditioner ......................... 4-9
Air flow charts .............................................. 4-6
Alarm system (See vehicle security
system) ...................................................... 2-11
Anchor point locations ............................... 1-34
Antenna...................................................... 4-23
Anti-lock brake system (ABS).................... 5-19
Anti-lock brake warning light ....................... 2-7
Ashtray (See cigarette lighter and
ashtray) ...................................................... 2-20
Audio system
Compact Disc (CD) changer ................ 4-20
FM-AM radio with cassette player ........ 4-10
FM-AM radio with compact disc (CD)
player .................................................... 4-15Automatic
Automatic power window switch .......... 2-25
Automatic transmission fluid (ATF) ...... 8-13
Driving with automatic transmission ....... 5-7
Transmission selector lever lock
release .................................................. 5-10
B
Battery........................................................ 8-17
Battery
Charge warning light .............................. 2-8
Battery replacement (See multi-remote
control system) ............................................ 3-8
Before starting the engine ........................... 5-6
Belts (See drive belts) ............................... 8-19
Brake
Anti-lock brake system (ABS) .............. 5-19
Brake booster ....................................... 8-24
Brake fluid............................................. 8-15
Brake light (See stop light) ................... 8-33
Brake pedal .......................................... 8-23
Brake system ........................................ 5-18
Brake warning light ................................. 2-8
Brake wear indicators ................. 2-11, 8-24
Parking brake check ............................. 8-23
Parking brake operation ....................... 5-13
Self-adjusting brakes ............................ 8-23Break-in schedule ...................................... 5-16
Bulb check/instrument panel ....................... 2-7
Bulb replacement ....................................... 8-33
C
Capacities and recommended fuel/
lubricants.................................................... 10-2
Car phone or CB radio .............................. 4-23
Cargo (See vehicle loading
information) .............................................. 10-14
Child restraint with top tether strap ........... 1-34
Child restraints ........................ 1-20, 1-25, 1-32
Child safety rear door lock .......................... 3-4
Cigarette lighter (accessory) and
ashtray ....................................................... 2-20
Cleaning exterior and interior ...................... 7-2
Clock................................................. 4-11, 4-16
Clutch
Clutch fluid ............................................ 8-16
Clutch pedal.......................................... 8-25
Cold weather driving .................................. 5-20
Controls
Heater and air conditioner controls ........ 4-3
Coolant
Capacities and recommended fuel/
lubricants .............................................. 10-2
Changing engine coolant........................ 8-8
ZX

Checking engine coolant level ............... 8-6
Engine coolant temperature gauge ........ 2-5
Corrosion protection .................................... 7-5
Cruise control............................................. 5-14
Cup holders ............................................... 2-21
D
Daytime running light system
(Canada only) ............................................ 2-17
Defogger switch
Rear window defogger switch .............. 2-16
Dimensions and weights............................ 10-9
Door locks .................................................... 3-3
Door open warning light .............................. 2-8
Drive belts .................................................. 8-19
Driving
Cold weather driving............................. 5-20
Driving with automatic transmission ....... 5-7
Driving with manual transmission ......... 5-11
Precautions when starting and driving ... 5-2
E
Economy - fuel........................................... 5-16
Emission control information label........... 10-12
Emission control system warranty ........... 10-20
Engine
Before starting the engine ...................... 5-6
Capacities and recommended fuel/
lubricants .............................................. 10-2Changing engine coolant........................ 8-8
Changing engine oil.............................. 8-10
Changing engine oil filter...................... 8-12
Checking engine coolant level ............... 8-6
Checking engine oil level ....................... 8-9
Engine compartment check locations ... 8-4,
8-5
Engine coolant temperature gauge ........ 2-5
Engine cooling system ........................... 8-6
Engine oil ................................................ 8-9
Engine oil and oil filter
recommendation ................................... 10-5
Engine oil pressure warning light ........... 2-8
Engine oil viscosity ............................... 10-5
Engine serial number ......................... 10-11
Engine specifications ............................ 10-8
Starting the engine ................................. 5-7
Exhaust gas (Carbon monoxide) ................. 5-2
Explanation of maintenance items .............. 9-2
F
Flashers (See hazard warning flasher
switch) ........................................................ 2-18
Flat tire ......................................................... 6-2
Floor mat positioning aid ............................. 7-4
Fluid
Automatic transmission fluid (ATF) ...... 8-13
Brake fluid............................................. 8-15
Capacities and recommended fuel/
lubricants .............................................. 10-2
Clutch fluid ............................................ 8-16Engine coolant ........................................ 8-6
Engine oil ................................................ 8-9
Power steering fluid .............................. 8-15
Window washer fluid ............................ 8-16
F.M.V.S.S. certification label ................... 10-11
Front fog light switch ................................. 2-18
Front seats ................................................... 1-2
Fuel
Capacities and recommended fuel/
lubricants .............................................. 10-2
Fuel economy ....................................... 5-16
Fuel filler cap ........................................ 3-13
Fuel filler lid lock opener lever ............. 3-13
Fuel gauge.............................................. 2-5
Fuel octane rating................................. 10-3
Fuel recommendation ........................... 10-3
Fuses ......................................................... 8-25
Fusible links ............................................... 8-25
G
Gauge
Engine coolant temperature gauge ........ 2-5
Fuel gauge.............................................. 2-5
Odometer ................................................ 2-3
Speedometer .......................................... 2-3
Tachometer............................................. 2-4
Trip odometer ......................................... 2-4
General maintenance .................................. 9-2
Glasses case ............................................. 2-21
Glove box................................................... 2-22
11-2
ZX

H
Hazard warning flasher switch .................. 2-18
Head restraints ............................................ 1-5
Headlight aiming adjustment ..................... 8-30
Headlight and turn signal switch ............... 2-16
Headlights .................................................. 8-29
Heater
Heater and air conditioner controls ........ 4-3
Heater operation ..................................... 4-4
Hood release ............................................... 3-9
Horn ........................................................... 2-19
I
Ignition switch .............................................. 5-4
Immobilizer system ..................... 2-11, 3-2, 5-6
Increasing fuel economy............................ 5-16
Indicator lights and chimes (See warning/
indicator lights and chimes) ......................... 2-7
Inside mirror ............................................... 3-15
Instrument brightness control .................... 2-17
Interior light ................................................ 2-27
Interior trunk lid release ............................. 3-12
J
Jump starting ............................................... 6-8K
Key ............................................................... 3-2
Keyless entry system (See multi-remote
control system) ............................................ 3-5
L
Labels
Air conditioner specification label ....... 10-12
Emission control information label...... 10-12
Engine serial number ......................... 10-11
F.M.V.S.S. certification label .............. 10-11
Vehicle identification number (VIN)
plate .................................................... 10-10
Warning labels (for SRS) ..................... 1-16
LATCH (Lower Anchors and Tether for
Children) System ....................................... 1-32
License plate
Installing the license plate .................. 10-13
Light
Air bag warning light ..................... 1-16, 2-9
Brake light (See stop light) ................... 8-33
Bulb check/instrument panel .................. 2-7
Bulb replacement.................................. 8-33
Charge warning light .............................. 2-8
Front fog light switch ............................ 2-18
Headlight aiming adjustment ................ 8-30
Headlight and turn signal switch .......... 2-16
Headlights ............................................. 8-29
Interior light ........................................... 2-27Light bulbs ............................................ 8-29
Low washer fluid warning light ............... 2-9
Spotlights (See map light) .................... 2-27
Trunk light ............................................. 2-28
Warning/indicator lights and chimes ...... 2-7
Lock
Child safety rear door lock ..................... 3-4
Door locks............................................... 3-3
Fuel filler lid lock opener lever ............. 3-13
Power door locks .................................... 3-4
Trunk lid lock opener lever ................... 3-10
M
Maintenance
General maintenance ............................. 9-2
Inside the vehicle.................................... 9-3
Maintenance precautions ....................... 8-2
Outside the vehicle ................................. 9-2
Periodic maintenance schedules ............ 9-5
Seat belt maintenance.......................... 1-24
Under the hood and vehicle ................... 9-4
Malfunction indicator lamp (MIL) ............... 2-10
Manual windows ........................................ 2-25
Meters and gauges ...................................... 2-2
Mirror
Inside mirror.......................................... 3-15
Outside mirror control ........................... 3-16
Vanity mirror ......................................... 3-15
Multi-remote control system ........................ 3-5
11-3
ZX