engine NISSAN SENTRA 2008 B16 / 6.G Service Manual

WARNING
cDo not leave children or adults who
would normally require the assistance
of others alone in your vehicle. Pets
should also not be left alone. They
could accidentally injure themselves or
others through inadvertent operation of
the vehicle. Also, on hot, sunny days,
temperatures in a closed vehicle could
quickly become high enough to cause
severe or possibly fatal injuries to
people or animals.
cClosely supervise children when they
are around cars to prevent them from
playing and becoming locked in the
trunk where they could be seriously in-
jured. Keep the car locked, with the rear
seatback and trunk lid securely latched
when not in use, and prevent children’s
access to car keys.
EXHAUST GAS (carbon monoxide)
WARNING
cDo not breathe exhaust gases; they
contain colorless and odorless carbon
monoxide. Carbon monoxide is danger-
ous. It can cause unconsciousness or
death.cIf you suspect that exhaust fumes are
entering the vehicle, drive with all win-
dows fully open, and have the vehicle
inspected immediately.
cDo not run the engine in closed spaces
such as a garage.
cDo not park the vehicle with the engine
running for any extended length of time.
cKeep the trunk lid closed while driving,
otherwise exhaust gases could be
drawn into the passenger compart-
ment. If you must drive with the trunk lid
open, follow these precautions:
1. Open all the windows.
2. Set the
air recirculation but-
ton (if so equipped) to off and the fan
control dial to 4 (high) to circulate
the air.
cIf electrical wiring or other cable con-
nections must pass to a trailer through
the seal on the trunk lid or the body,
follow the manufacturer’s recommen-
dation to prevent carbon monoxide en-
try into the vehicle.
cThe exhaust system and body should be
inspected by a qualified mechanic
whenever:a. The vehicle is raised for service.
b. You suspect that exhaust fumes are
entering into the passenger
compartment.
c. You notice a change in the sound of
the exhaust system.
d. You have had an accident involving
damage to the exhaust system, un-
derbody, or rear of the vehicle.
THREE-WAY CATALYST
The three-way catalyst is an emission control
device installed in the exhaust system. Exhaust
gases in the three-way catalyst are burned at
high temperatures to help reduce pollutants.
WARNING
cThe exhaust gas and the exhaust sys-
tem are very hot. Keep people, animals
or flammable materials away from the
exhaust system components.
cDo not stop or park the vehicle over
flammable materials such as dry grass,
waste paper or rags. They may ignite
and cause a fire.
PRECAUTIONS WHEN STARTING
AND DRIVING
5-2Starting and driving
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CAUTION
cDo not use leaded gasoline. Deposits
from leaded gasoline will seriously re-
duce the three-way catalyst’s ability to
help reduce exhaust pollutants.
cKeep your engine tuned up. Malfunc-
tions in the ignition, fuel injection, or
electrical systems can cause overrich
fuel flow into the three-way catalyst,
causing it to overheat. Do not keep driv-
ing if the engine misfires, or if notice-
able loss of performance or other un-
usual operating conditions are
detected. Have the vehicle inspected
promptly by a NISSAN dealer.
cAvoid driving with an extremely low fuel
level. Running out of fuel could cause
the engine to misfire, damaging the
three-way catalyst.
cDo not race the engine while warming it
up.
cDo not push or tow your vehicle to start
the engine.
TIRE PRESSURE MONITORING
SYSTEM (TPMS) (if so equipped)
Each tire, including the spare (if provided) ,
should be checked monthly when cold and in-
flated to the inflation pressure recommended by
the vehicle manufacturer on the vehicle placard
or tire inflation pressure label. (If your vehicle has
tires of a different size than the size indicated on
the vehicle placard or tire inflation pressure label,
you should determine the proper tire inflation
pressure for those tires.)
As an added safety feature, your vehicle has been
equipped with a Tire Pressure Monitoring System
(TPMS) that illuminates a low tire pressure telltale
when one or more of your tires is significantly
under-inflated. Accordingly, when the low tire
pressure telltale illuminates, you should stop and
check your tires as soon as possible, and inflate
them to the proper pressure. Driving on a signifi-
cantly under-inflated tire causes the tire to over-
heat and can lead to tire failure. Under-inflation
also reduces fuel efficiency and tire tread life, and
may affect the vehicle’s handling and stopping
ability.
Please note that the TPMS is not a substitute for
proper tire maintenance, and it is the driver’s
responsibility to maintain correct tire pressure,even if under-inflation has not reached the level to
trigger illumination of the TPMS low tire pressure
telltale.
Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate when the
system is not operating properly. The TPMS mal-
function indicator is combined with the low tire
pressure telltale. When the system detects a
malfunction, the telltale will flash for approxi-
mately one minute and then remain continuously
illuminated. This sequence will continue upon
subsequent vehicle start-ups as long as the mal-
function exists. When the malfunction indicator is
illuminated, the system may not be able to detect
or signal low tire pressure as intended. TPMS
malfunctions may occur for a variety of reasons,
including the installation of replacement or alter-
nate tires or wheels on the vehicle that prevent
the TPMS from functioning properly. Always
check the TPMS malfunction telltale after replac-
ing one or more tires or wheels on your vehicle to
ensure that the replacement or alternate tires and
wheels allow the TPMS to continue to function
properly.
Additional information:
cThe TPMS does not monitor the tire pres-
sure of the spare tire.
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To lock the steering wheel:
1. Turn the ignition switch to the LOCK posi-
tion.
2. Remove the key, if it is inserted in the ignition
switch.
3. Turn the steering wheel 1/8 of a turn clock-
wise from the straight up position.
To unlock the steering wheel:
1. Insert the key into the ignition switch, if nec-
essary.
2. Gently turn the ignition switch while rotating
the steering wheel slightly right and left.
MANUAL TRANSMISSION
The ignition switch includes a device that helps
prevent accidental removal of the key while driv-
ing.
The key can only be removed when the ignition
switch is in the LOCK position.
On manual transmission models, to turn the igni-
tion key to LOCK position from ACC or ON
position, turn the key to OFF, push the key in, then
turn the key to LOCK.
In order for the steering wheel to be locked, it
must be turned about 1/8 of a turn clockwise
from the straight up position.To lock the steering wheel, turn the key to
the LOCK position. Remove the key. To
unlock the steering wheel, insert the key
and turn it gently while rotating the steer-
ing wheel slightly right and left.
KEY POSITIONS
LOCK: Normal parking position (0)
Intelligent Key system:
PUSH OFF- The steering lock can only be locked
at this position.
PUSH ON- The ignition switch will be unlocked
while carrying the Intelligent Key.
OFF: (Manual transmission model) (1)
The engine can be turned off without locking the
steering wheel.
ACC: (Accessories) (2)
This position activates electrical accessories
such as the radio when the engine is not running.
ON: Normal operating position (3)
This position turns on the ignition system and the
electrical accessories.
START: (4)
This position starts the engine. As soon as the
engine has started, release the key. It automati-
cally returns to the ON position.
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NISSAN VEHICLE IMMOBILIZER
SYSTEM
The NISSAN Vehicle Immobilizer System will not
allow the engine to start without the use of the
registered key.
If the engine fails to start using a registered key
(for example, when interference is caused by
another registered key, an automated toll road
device or automatic payment device on the key
ring) , restart the engine using the following pro-
cedures:
1. Leave the ignition switch in the ON position
for approximately 5 seconds.
2. Turn the ignition switch to the OFF or LOCK
position, and wait approximately 10 sec-
onds.
3. Repeat steps 1 and 2.
4. Restart the engine while holding the device
(which may have caused the interference)
separate from the registered key.
If the no start condition re-occurs, NISSAN rec-
ommends placing the registered key on a sepa-
rate key ring to avoid interference from other
devices.cMake sure the area around the vehicle is
clear.
cCheck fluid levels such as engine oil, cool-
ant, brake and clutch fluid, and window
washer fluid as frequently as possible, or at
least whenever you refuel.
cCheck that all windows and lights are clean.
cVisually inspect tires for their appearance
and condition. Also check tires for proper
inflation.
cLock all doors.
cPosition seat and adjust head restraints.
cAdjust inside and outside mirrors.
cFasten seat belts and ask all passengers to
do likewise.
cCheck the operation of warning lights when
the key is turned to the ON (3) position. See
“Warning/indicator lights and audible re-
minders” in the “Instruments and controls”
section of this manual.1. Apply the parking brake.
2.CVT model:
Move the shift selector lever to P (Park) or N
(Neutral) . P (Park) is recommended.
The shift selector lever cannot be
moved out of P (Park) and into any of
the other gear positions if the ignition
key is turned to the OFF position or if
the key is removed from the ignition
switch.
The starter is designed not to operate if
the shift selector lever is in any of the
driving positions.
Manual transmission model:
Move the shift lever to N (Neutral) . Depress
the clutch pedal to the floor while cranking
the engine.
The starter is designed not to operate
unless the clutch pedal is fully de-
pressed.
Intelligent Key system models:Slowly
“PUSH ON” the ignition switch. When the
Intelligent Key system warning light
in
the meter illuminates in green, the ignition
switch can be turned.
BEFORE STARTING THE ENGINE STARTING THE ENGINE
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The Intelligent Key must be carried
when operating the ignition switch.
When the Intelligent Key system warning
light
in the meter blinks in red and the
inside warning buzzer emits a short beep, be
sure that the selector lever is in the P (Park)
position and the ignition switch is securely
returned to the LOCK position.
The Intelligent Key system warning
light
blinking in red, turns off by per-
forming the following operations:
cReturn the ignition switch to the LOCK
position.
cTurn the ignition switch to the ACC posi-
tion.
When the buzzer beeps 4 times continu-
ously, check for the following:
cThe ignition switch is returned to the
LOCK position.
cThe mechanical key is not inserted into
the ignition switch.
The inside warning buzzer stops when one
of the following is performed:
cReturn the ignition switch to the LOCK
position.cRemove the mechanical key from the ig-
nition switch.
cClose the doors.
3. Crank the enginewith your foot off the
accelerator pedalby turning the ignition
key to START. Release the key when the
engine starts. If the engine starts, but fails to
run, repeat the above procedure.
cIf the engine is very hard to start in ex-
tremely cold weather or when restarting,
depress the accelerator pedal a little (ap-
proximately 1/3 to the floor) and hold it
and then crank the engine. Release the
key and the accelerator pedal when the
engine starts.
cIf the engine is very hard to start because
it is flooded, depress the accelerator
pedal all the way to the floor and hold it.
Crank the engine for 5-6 seconds. After
cranking the engine, release the accel-
erator pedal. Crank the enginewith your
foot off the accelerator pedalby turn-
ing the ignition key to START. Release the
key when the engine starts. If the engine
starts, but fails to run, repeat the above
procedure.
CAUTION
Do not operate the starter for more than
15 seconds at a time. If the engine does
not start, turn the key off and wait 10
seconds before cranking again, otherwise
the starter could be damaged.
4.Warm-up
Allow the engine to idle for at least 30 sec-
onds after starting. Do not race the engine
while warming it up. Drive at moderate
speed for a short distance first, especially in
cold weather.
5-10Starting and driving
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CONTINUOUSLY VARIABLE
TRANSMISSION (CVT) (if so
equipped)
WARNING
cDo not depress the accelerator pedal
while shifting from P (Park) or N (Neu-
tral) to R (Reverse) , D (Drive) or L (Low) .
Always depress the brake pedal until
shifting is completed. Failure to do so
could cause you to lose control and
have an accident.
cCold engine idle speed is high, so use
caution when shifting into a forward or
reverse gear before the engine has
warmed up.
cDo not downshift abruptly on slippery
roads. This may cause a loss of control.
cNever shift to P (Park) or R (Reverse)
while the vehicle is moving. This could
cause an accident.
CAUTION
When stopping the vehicle on an uphill
grade, do not hold the vehicle by depress-
ing the accelerator pedal. The foot brake
should be used for this purpose.The CVT in your vehicle is electronically con-
trolled to produce maximum power and smooth
operation.
The recommended operating procedures for this
transmission are shown on the following pages.
Follow these procedures for maximum vehicle
performance and driving enjoyment.
NOTE:
Engine power may be automatically re-
duced to protect the CVT if the engine
speed increases quickly when driving on
slippery roads or while being tested on
some dynamometers.
Starting the vehicle
1. After starting the engine, fully depress the
foot brake pedal before moving the shift
selector lever out of the P (Park) position.
2. Keep the foot brake pedal depressed and
move the shift selector lever into a driving
gear.
3. Release the foot brake, then gradually start
the vehicle in motion.
4. Stop the vehicle completely before shifting
the selector lever to the P (Park) position.The CVT is designed so the foot brake
pedal MUST be depressed before shifting
from P (Park) to any drive position while
the ignition switch is in the ON position.
The shift selector lever cannot be moved
out of P (Park) and into any of the other
gear positions if the ignition key is turned
to the LOCK or OFF position or if the key is
removed.
DRIVING THE VEHICLE
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To move the selector lever:
Push the buttonsAwhile depressing the
brake pedal
Push the buttonsAto shift
Shift without pushing buttonsA
Shifting
After starting the engine, fully depress the brake
pedal and move the shift selector lever from P
(Park) to any of the desired shift positions.
WARNING
Apply the parking brake if the selector
lever is in any position while the engine is
not running. Failure to do so could cause
the vehicle to move unexpectedly or roll
away and result in serious personal injury
or property damage.
If the key is turned to the OFF or ACC position for
any reason while the vehicle is in N (Neutral) , or
any drive position, the key cannot be turned to the
LOCK position and be removed from the ignition
switch. If this occurs, perform the following steps:
1. Apply the parking brake when the vehicle is
stopped.
2. Move the shift selector lever to P (Park) to
park the vehicle and turn the ignition key to
the LOCK position to remove the key.
P (Park):
CAUTION
To prevent transmission damage, use the
P (Park) or R (Reverse) position only when
the vehicle is completely stopped.
Use the P (Park) selector position when the ve-
hicle is parked or when starting the engine. Make
sure the vehicle is completely stopped.The
brake pedal must be depressed and theselector lever button pushed in to move the
selector lever from the N (Neutral) or any
drive position to P (Park) .Apply the parking
brake. When parking on a hill, apply the parking
brake first, then shift the selector lever into the P
(Park) position.
R (Reverse):
CAUTION
To prevent transmission damage, use the
P (Park) or R (Reverse) position only when
the vehicle is completely stopped.
Use the R (Reverse) position to back up. Make
sure the vehicle is completely stopped before
selecting R (Reverse) position. R (Reverse)
speed is limited to 25 MPH (40 km/h) . Do not
exceed 25 MPH (40 km/h) in the R (Reverse)
position.The brake pedal must be de-
pressed and the selector lever button
pushed in to move the selector lever from P
(Park) , N (Neutral) or any drive position to R
(Reverse) .
N (Neutral):
Neither forward nor reverse gear is engaged. The
engine can be started in this position. You may
shift to N (Neutral) and restart a stalled engine
while the vehicle is moving.
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D (Drive):
Use this position for all normal forward driving.
L (Low):
Use this position for maximum engine braking on
steep downhill gradients/climbing steep slopes
and whenever approaching sharp bends. Do not
use the L (Low) position in any other circum-
stances.
Manual shift mode (if so equipped)
When the manual shift mode buttonsAis
pressed with the vehicle stopped or while driving,
the transmission enters the manual shift mode.
Shift ranges can be selected manually using the
paddles on the steering wheel
sBandsC.
In the manual shift mode, the shift range is dis-
played on the position indicator in the meter.
Shift ranges up or down one by one as follows:
M1Ã!M2Ã!M3Ã!M4Ã!M5Ã!M6
M6 (6th):
Use this position for all normal forward driving.M5 (5th):
Use this position when driving up long slopes, or
for engine braking when driving down long
slopes.
M4 (4th) , M3 (3rd) and M2 (2nd):
Use for hill climbing or engine braking on downhill
grades.
M1 (1st):
Use this position when climbing steep hills slowly
or driving slowly through deep snow, sand or
mud, or for maximum engine braking on steep
downhill grades.
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To push the shift lock release, complete the fol-
lowing procedure:
1. Turn the ignition key to the LOCK position
and remove the key
2. Apply the parking brake.
3. Remove the shift lock release cover as
shown.
4. Insert a small screwdriver in the shift lock
release slot and push down.
5. Move the shift selector lever to the N (Neu-
tral) position while holding down the shift
lock release.
6. Turn the key to the ON position to unlock the
steering wheel. Now the vehicle may be
moved to the desired location.
If the shift selector lever cannot be moved out of
P (Park) , have a NISSAN dealer check the trans-
mission as soon as possible.
WARNING
If the selector lever cannot be moved from
the P (Park) position while the engine is
running and the brake pedal is depressed,
the stop lights may not work. Malfunction-
ing stop lights could cause an accident
injuring yourself and others.
Overdrive (O/D) OFF switch
When the O/D OFF switch is pushed with the
selector lever in the D (Drive) position, the
light in the instrument panel illuminates. See
“Overdrive off indicator light” in the “Instruments
and controls” section of this manual.
Use the Overdrive off mode when you need im-
proved engine braking.
To turn off the Overdrive off mode, push the O/D
OFF switch again. The
indicator light will
turn off.
Each time the engine is started, or when the
selector lever is shifted to any position other thanD (Drive) , the Overdrive off mode will be auto-
matically turned off.
Accelerator downshift
— in D position —
For passing or hill climbing, depress the accel-
erator pedal to the floor. This shifts the transmis-
sion down into a lower gear, depending on the
vehicle speed.
Fail-safe
When the fail-safe operation occurs, the CVT will
not be shifted into the selected driving position.
If the vehicle is driven under extreme con-
ditions, such as excessive wheel spinning
and subsequent hard braking, the fail-safe
system may be activated. The MIL may
come on to indicate the fail-safe mode is
activated, see “Malfunction indicator light
(MIL)” in the “Instrument and controls” sec-
tion. This will occur even if all electrical
circuits are functioning properly. In this
case, turn the ignition switch to the OFF
position and wait for 10 seconds. Then turn
the switch back to the ON position. The
vehicle should return to its normal operat-
ing condition. If it does not return to its
normal operating condition, have a
NISSAN dealer check the transmission and
repair if necessary.
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WARNING
When the high fluid temperature protec-
tion mode or fail-safe operation occurs,
vehicle speed may be gradually reduced.
The reduced speed may be lower than
other traffic, which could increase the
chance of a collision. Be especially care-
ful when driving. If necessary, pull to the
side of the road at a safe place and allow
the transmission to return to normal op-
eration, or have it repaired if necessary.
MANUAL TRANSMISSION (if so
equipped)
WARNING
cDo not downshift abruptly on slippery
roads. This may cause a loss of control.
cDo not over-rev the engine when shift-
ing to a lower gear. This may cause a
loss of control or engine damage.
CAUTION
cDo not rest your foot on the clutch pedal
while driving. This may cause clutch
damage.
cFully depress the clutch pedal before
shifting to help prevent transmission
damage.
cStop your vehicle completely before
shifting into R (Reverse) .
cWhen the vehicle is stopped with the
engine running (for example, at a stop
light) , shift to N (Neutral) and release
the clutch pedal with the foot brake
applied.
Shifting
To change gears, or when upshifting or down-
shifting, depress the clutch pedal fully, shift into
the appropriate gear, then release the clutch
slowly and smoothly.
To ensure smooth gear changes, fully depress
the clutch pedal before operating the shift lever. If
the clutch pedal is not fully depressed before the
transmission is shifted, a gear noise may be
heard. Transmission damage may occur.
Start the vehicle in 1st gear and shift to 2nd, 3rd,
4th and 5th up to 6th gear in sequence according
to vehicle speed.
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