width NISSAN ALMERA N16 2001 Electronic Repair Manual

Dimensions=NJGI0008S03Unit: mm (in)
Item Sedan HB
Overall length 4,470 (176.0) 4,184 (164.7)
Overall width 1,695 (66.7) 1,710 (67.3)
Overall height 1,440 (56.7) 1,440 (56.7)
Front tread1,470 (57.9)
1,490 (58.7)*1,470 (57.9)
Rear tread1,450 (57.1)
1,470 (57.9)*1,455 (57.3)
Wheelbase 2,535 (99.8) 2,535 (99.8)
*: For 14 x 5J road wheel equipped models
Wheels and TiresNJGI0008S04Sedan
Item Except for Europe Europe
Road wheelSteel/offset mm (in)14 x 5J/35 (1.38)
14 x 5-1/2JJ/45 (1.77)
15 x 6JJ/45 (1.77)14 x 5J/35 (1.38)
15 x 6JJ/45 (1.77)
Aluminum/offset mm (in) 14 x 6J (J)*/45 (1.77) 15 x 6J*/45 (1.77)
Tire sizeConventional175/65R14
175/70R14
185/65R14
185/65R15175/70R14
185/65R15
195/60R15
Spare Conventional T135/80D15
*: Option
Hatchback
Item
Road wheelSteel/offset mm (in)
15 x 6JJ/45 (1.77)
Aluminum/offset mm (in)
Tire sizeConventional185/65R15
195/60R15
SpareConventional
T135/80/D15*
*: For models with QG18DE A/T
IDENTIFICATION INFORMATION
Dimensions
GI-43

SEM932C
5. Ream valve guide.
Finished size:
Intake & Exhaust
5.500 - 5.515 mm (0.2165 - 0.2171 in)
SEM934C
VALVE SEATSNJEM0019S10Check valve seats for pitting at contact surface. Resurface or
replace if excessively worn.
+Before repairing valve seats, check valve and valve guide
for wear. If they have worn, replace them. Then correct
valve seat.
+Use both hands to cut uniformly.
SEM795A
REPLACING VALVE SEAT FOR SERVICE PARTSNJEM0019S111. Bore out old seat until it collapses. Set machine depth stop so
that boring cannot contact the bottom face of seat recess in
cylinder head.
2. Ream cylinder head recess.
Reaming bore for service valve seat
Oversize [0.5 mm (0.020 in)]:
Refer to SDS, EM-70.
Use the valve guide center for reaming to ensure valve seat
will have the correct fit.
SEM008A
3. Heat cylinder head to 110 to 130ÉC (230 to 266ÉF).
4. Press fit valve seat until it seats on the bottom.
SEM892B
5. Cut or grind valve seat using suitable tool to the specified
dimensions as shown in SDS, EM-70.
6. After cutting, lap valve seat with abrasive compound.
7. Check valve seating condition.
Seat face angle ªaº:
44É53¢- 45É07¢
Contacting width ªWº:
Intake
1.06 - 1.34 mm (0.0417 - 0.0528 in)
Exhaust
1.20 - 1.68 mm (0.0472 - 0.0661 in)
CYLINDER HEADQG
Inspection (Cont'd)
EM-40

CAUTION:
+When installing camshafts, chain tensioners, oil seals, or
other sliding parts, lubricate contacting surfaces with new
engine oil.
+Apply new engine oil to threads and seat surfaces when
installing cylinder head, camshaft sprocket, crankshaft
pulley, and camshaft bracket.
+Attach tags to valve lifters so as not to mix them up.
RemovalNJEM0063PREPARATIVE WORKNJEM0063S011. Drain engine coolant. Refer to LC-43, ªChanging Engine Cool-
antº.
2. Remove exhaust manifold. Refer to EM-111, ªRemovalº.
3. Remove intake manifold. Refer to EM-107, ªRemovalº.
+Apply paint to camshaft sprockets for alignment during
installation.
JEM152G
CAMSHAFTNJEM0063S021. Remove the following parts:
+Rocker cover
+Vacuum pump and cylinder head rear cover assembly
+Spill tube
+High pressure injection nozzle assembly
+Secondary timing chain and associated parts
JEM159G
2. Remove camshaft sprockets.
+Holding the hexagonal part of the camshaft with a wrench
having 21 mm (0.83 in) width between facing flats, loosen the
bolt holding the camshaft sprocket.
JEM160G
3. Remove camshafts.
+Loosen bolts holding the camshaft bracket in several stages in
the reverse order of that shown in the figure, and remove them.
4. Remove adjusting shims and valve lifters.
+Confirm the correct location of each part removed. Store them
so they do not get mixed up.
+For re-installation, be sure to put mark on camshaft
bracket before removal.
CYLINDER HEADYD
Components (Cont'd)
EM-119

Available Main BearingNJEM0085
SEM255G
Grade number Thickness ªTº mm (in) Width ªWº mm (in) Identification color
0 1.816 - 1.820 (0.0715 - 0.0717)
19.9 - 20.1 (0.783 - 0.791)Black
1 1.820 - 1.824 (0.0717 - 0.0718) Red or Brown
2 1.824 - 1.828 (0.0718 - 0.0720) Green
3 1.828 - 1.832 (0.0720 - 0.0721) Yellow
4 1.832 - 1.836 (0.0721 - 0.0723) Blue
UNDERSIZENJEM0085S01Unit: mm (in)
Thickness Main journal diameter ªDmº
0.25 (0.0098) 1.949 - 1.953 (0.0767 - 0.0769)Grind so that bearing clearance is the specified
value.
Available Connecting Rod BearingNJEM0086CONNECTING ROD BEARINGNJEM0086S01
Grade number Thickness ªTº mm (in) Width ªWº mm (in) Identification color (mark)
0 1.492 - 1.496 (0.0587 - 0.0589)
22.9 - 23.1
(0.902 - 0.909)Black
1 1.496 - 1.500 (0.0589 - 0.0591) Brown
2 1.500 - 1.504 (0.0591 - 0.0592) Green
UNDERSIZENJEM0086S02Unit: mm (in)
Thickness Crank pin journal diameter ªDpº
0.08 (0.0031) 1.536 - 1.540 (0.0605 - 0.0606)
Grind so that bearing clearance is the specified
value. 0.12 (0.0047) 1.556 - 1.560 (0.0613 - 0.0614)
0.25 (0.0098) 1.621 - 1.625 (0.0638 - 0.0640)
Miscellaneous ComponentsNJEM0087Unit: mm (in)
Flywheel runout [TIR]*Less than 0.15 (0.0059)
*: Total indicator reading
SERVICE DATA AND SPECIFICATIONS (SDS)YD
Available Main Bearing
EM-169

SLC428B
REMOVALNJLC0076S011. Using a socket wrench [plane-to-plane width: 17 mm (0.67 in)],
loosen the filter body approximately four turns.
JLC291B
2. Drain the oil after matching the ªDRAINº arrow mark at the
bottom of the filter body to the protrusion on the oil filter
bracket.
+Catch the oil with a pan or cloth.
CAUTION:
+The drained oil flows over the right surface of the filter
body.
+Completely wipe clean any engine oil remaining on the
filter body or vehicle.
3. Remove the filter body, then remove the oil filter element.
JLC292B
4. Remove the O-ring from the filter body.
+Push the O-ring in one direction, lift the slack part using
fingers, and remove the O-ring from the filter body.
CAUTION:
Do not use wires or flat-bladed screwdrivers etc. as they may
cause damage to the filter body.
INSTALLATIONNJLC0076S021. Completely remove all foreign objects adhering to the inside of
the filter body or O-ring mounting area (body side and bracket
side).
2. Install the oil filter element and O-ring to the filter body.
+Push the oil filter element into the filter body completely.
3. Install the filter body to the oil filter bracket.
: 20 - 24 N´m (2.0 - 2.5 kg-m, 15 - 18 ft-lb)
4. After warming up the engine, check for engine oil leakage.
ENGINE LUBRICATION SYSTEMYD
Changing Oil Filter (Cont'd)
LC-32

Mixture Ratio Feedback Control (Closed loop control)NJEC0014S04
SEF336WA
The mixture ratio feedback system provides the best air-fuel mixture ratio for driveability and emission con-
trol. The three way catalyst can then better reduce CO, HC and NOx emissions. This system uses a heated
oxygen sensor 1 (front) in the exhaust manifold to monitor if the engine operation is rich or lean. The ECM
adjusts the injection pulse width according to the sensor voltage signal. For more information about the heated
oxygen sensor 1 (front), refer to EC-176. This maintains the mixture ratio within the range of stoichiometric
(ideal air-fuel mixture).
This stage is referred to as the closed loop control condition.
Heated oxygen sensor 2 (rear) is located downstream of the three way catalyst. Even if the switching char-
acteristics of the heated oxygen sensor 1 (front) shift, the air-fuel ratio is controlled to stoichiometric by the
signal from the heated oxygen sensor 2 (rear).
Open Loop ControlNJEC0014S05The open loop system condition refers to when the ECM detects any of the following conditions. Feedback
control stops in order to maintain stabilized fuel combustion.
+Deceleration and acceleration
+High-load, high-speed operation
+Malfunction of heated oxygen sensor 1 (front) or its circuit
+Insufficient activation of heated oxygen sensor 1 (front) at low engine coolant temperature
+High engine coolant temperature
+During warm-up
+When starting the engine
Mixture Ratio Self-learning ControlNJEC0014S06The mixture ratio feedback control system monitors the mixture ratio signal transmitted from the heated oxy-
gen sensor 1 (front). This feedback signal is then sent to the ECM. The ECM controls the basic mixture ratio
as close to the theoretical mixture ratio as possible. However, the basic mixture ratio is not necessarily con-
trolled as originally designed. Both manufacturing differences (i.e., mass air flow sensor hot film) and charac-
teristic changes during operation (i.e., injector clogging) directly affect mixture ratio.
Accordingly, the difference between the basic and theoretical mixture ratios is monitored in this system. This
is then computed in terms of ªinjection pulse durationº to automatically compensate for the difference between
the two ratios.
ªFuel trimº refers to the feedback compensation value compared against the basic injection duration. Fuel trim
includes short term fuel trim and long term fuel trim.
ªShort term fuel trimº is the short-term fuel compensation used to maintain the mixture ratio at its theoretical
value. The signal from the heated oxygen sensor 1 (front) indicates whether the mixture ratio is RICH or LEAN
compared to the theoretical value. The signal then triggers a reduction in fuel volume if the mixture ratio is
rich, and an increase in fuel volume if it is lean.
ªLong term fuel trimº is overall fuel compensation carried out long-term to compensate for continual deviation
of the short term fuel trim from the central value. Such deviation will occur due to individual engine differences,
wear over time and changes in the usage environment.
ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTIONQG
Multiport Fuel Injection (MFI) System (Cont'd)
EC-30

Fuel Injection TimingNJEC0014S07
SEF337W
Two types of systems are used.
Sequential Multiport Fuel Injection System
NJEC0014S0701Fuel is injected into each cylinder during each engine cycle according to the firing order. This system is used
when the engine is running.
Simultaneous Multiport Fuel Injection System
NJEC0014S0702Fuel is injected simultaneously into all four cylinders twice each engine cycle. In other words, pulse signals of
the same width are simultaneously transmitted from the ECM.
The four injectors will then receive the signals two times for each engine cycle.
This system is used when the engine is being started and/or if the fail-safe system (CPU) is operating.
Fuel Shut-offNJEC0014S08Fuel to each cylinder is cut off during deceleration or operation of the engine at excessively high speeds.
Electronic Ignition (EI) System
DESCRIPTIONNJEC0015Input/Output Signal ChartNJEC0015S01
Sensor Input Signal to ECMECM func-
tionActuator
Crankshaft position sensor (POS) Engine speed
Ignition tim-
ing controlPower transistor Camshaft position sensor (PHASE) Engine speed and cylinder number
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Throttle position sensorThrottle position
Throttle valve idle position
Vehicle speed sensor Vehicle speed
Ignition switch Start signal
Knock sensor Engine knocking
PNP switch Gear position
Battery Battery voltage
ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTIONQG
Multiport Fuel Injection (MFI) System (Cont'd)
EC-31

System DescriptionNJEC0015S02
SEF742M
The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of
the engine. The ignition timing data is stored in the ECM. This data forms the map shown above.
The ECM receives information such as the injection pulse width, crankshaft position sensor signal and cam-
shaft position sensor signal. Computing this information, ignition signals are transmitted to the power transis-
tor.
e.g., N: 1,800 rpm, Tp: 1.50 msec
AÉBTDC
During the following conditions, the ignition timing is revised by the ECM according to the other data stored
in the ECM.
+At starting
+During warm-up
+At idle
+During acceleration
The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed
within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not
operate under normal driving conditions.
If engine knocking occurs, the knock sensor monitors the condition. The signal is transmitted to the ECM. The
ECM retards the ignition timing to eliminate the knocking condition.
Air Conditioning Cut Control
DESCRIPTIONNJEC0016Input/Output Signal ChartNJEC0016S01
Sensor Input Signal to ECMECM func-
tionActuator
Air conditioner switch Air conditioner ªONº signal
Air condi-
tioner cut
controlAir conditioner relay PNP switch Neutral position
Throttle position sensor Throttle valve opening angle
Crankshaft position sensor (POS) Engine speed
Engine coolant temperature sensor Engine coolant temperature
Ignition switch Start signal
Refrigerant pressure sensor Refrigerant pressure
Vehicle speed sensor Vehicle speed
Power steering oil pressure switch Power steering operation
System DescriptionNJEC0016S02This system improves engine operation when the air conditioner is used.
Under the following conditions, the air conditioner is turned off.
+When the accelerator pedal is fully depressed.
+When cranking the engine.
ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTIONQG
Electronic Ignition (EI) System (Cont'd)
EC-32

Freeze frame data
item*Description
ENGINE SPEED
[rpm]+The engine speed at the moment a malfunction is detected is displayed.
VEHICL SPEED
[km/h] or [mph]+The vehicle speed at the moment a malfunction is detected is displayed.
ABSOL TH´P/S [%]+The throttle valve opening angle at the moment a malfunction is detected is displayed.
B/FUEL SCHDL
[msec]+The base fuel schedule at the moment a malfunction is detected is displayed.
INT/A TEMP SE [ÉC]
or [ÉF]+The intake air temperature at the moment a malfunction is detected is displayed.
*: The items are the same as those of 1st trip freeze frame data.
DATA MONITOR MODENJEC0034S06
Monitored item [Unit]ECM
input
signalsMain
signalsDescription Remarks
ENG SPEED [rpm]jj+Indicates the engine speed computed from
the POS signal of the crankshaft position
sensor.+Accuracy becomes poor if engine
speed drops below the idle rpm.
+If the signal is interrupted while the
engine is running, an abnormal
value may be indicated.
MAS A/F SE-B1 [V]jj+The signal voltage of the mass air flow sen-
sor is displayed.+When the engine is stopped, a cer-
tain value is indicated.
B/FUEL SCHDL
[msec]+ªBase fuel scheduleº indicates the fuel
injection pulse width programmed into
ECM, prior to any learned on board correc-
tion.
A/F ALPHA-B1 [%]j+Indicates the mean value of the air-fuel
ratio feedback correction factor per cycle.+When the engine is stopped, a cer-
tain value is indicated.
+This data also includes the data for
the air-fuel ratio learning control.
COOLAN TEMP/S
[ÉC] or [ÉF]jj+The engine coolant temperature (deter-
mined by the signal voltage of the engine
coolant temperature sensor) is displayed.+When the engine coolant tempera-
ture sensor is open or short-
circuited, ECM enters fail-safe
mode. The engine coolant tempera-
ture determined by the ECM is dis-
played.
HO2S1 (B1) [V]jj+The signal voltage of the heated oxygen
sensor 1 (front) is displayed.
HO2S2 (B1) [V]j+The signal voltage of the heated oxygen
sensor 2 (rear) is displayed.
HO2S1 MNTR (B1)
[RICH/LEAN]j+Display of heated oxygen sensor 1 (front)
signal during air-fuel ratio feedback control:
RICH ... means the mixture became ªrichº,
and control is being affected toward a
leaner mixture.
LEAN ... means the mixture became ªleanº,
and control is being affected toward a rich
mixture.+After turning ON the ignition switch,
ªRICHº is displayed until air-fuel
mixture ratio feedback control
begins.
+When the air-fuel ratio feedback is
clamped, the value just before the
clamping is displayed continuously.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONQG
CONSULT-II (Cont'd)
EC-85

Monitored item [Unit]ECM
input
signalsMain
signalsDescription Remarks
HO2S2 MNTR (B1)
[RICH/LEAN]j+Display of heated oxygen sensor 2 (rear)
signal:
RICH ... means the amount of oxygen after
three way catalyst is relatively small.
LEAN ... means the amount of oxygen after
three way catalyst is relatively large.+When the engine is stopped, a cer-
tain value is indicated.
VHCL SPEED SE
[km/h] or [mph]jj+The vehicle speed computed from the
vehicle speed sensor signal is displayed.
BATTERY VOLT [V]j+The power supply voltage of ECM is dis-
played.
THRTL POS SEN [V]jj+The throttle position sensor signal voltage is
displayed.
FUEL T/TMP SE
[ÉC] or [ÉF]*+The fuel temperature judged from the fuel
tank temperature sensor signal voltage is
displayed.
INT/A TEMP SE
[ÉC] or [ÉF]j+The intake air temperature determined by
the signal voltage of the intake air tempera-
ture sensor is indicated.
EGR TEMP SEN [V]*jj+The signal voltage of the EGR temperature
sensor is displayed.
START SIGNAL
[ON/OFF]jj+Indicates [ON/OFF] condition from the
starter signal.+After starting the engine, [OFF] is
displayed regardless of the starter
signal.
CLSD THL POS
[ON/OFF]jj+Indicates idle position [ON/OFF] computed
by ECM according to the throttle position
sensor signal.
CLSD THL/P SW
[ON/OFF]*j+Indicates mechanical contact [ON/OFF]
condition of the closed throttle position
switch.
AIR COND SIG
[ON/OFF]jj+Indicates [ON/OFF] condition of the air con-
ditioner switch as determined by the air
conditioning signal.
P/N POSI SW
[ON/OFF]jj+Indicates [ON/OFF] condition from the PNP
switch signal.
PW/ST SIGNAL
[ON/OFF]jj+Indicates [ON/OFF] condition of the power
steering oil pressure switch determined by
the power steering oil pressure switch sig-
nal.
LOAD SIGNAL
[ON/OFF]jj+Indicates [ON/OFF] condition from the elec-
trical load signal and/or lighting switch.
ON ... rear defogger is operating and/or
lighting switch is on.
OFF ... rear defogger is not operating and
lighting switch is not on.
IGNITION SW
[ON/OFF]j+Indicates [ON/OFF] condition from ignition
switch.
HEATER FAN SW
[ON/OFF]j+Indicates [ON/OFF] condition from the
heater fan switch.
INJ PULSE-B1
[msec]j+Indicates the actual fuel injection pulse
width compensated by ECM according to
the input signals.+When the engine is stopped, a cer-
tain computed value is indicated.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONQG
CONSULT-II (Cont'd)
EC-86