2001 NISSAN ALMERA N16 fuel type

System DescriptionNJEC0444
Sensor Input Signal to ECMECM func-
tionActuator
Crankshaft position sensor (POS) Engine speed
Fuel pump
controlFuel pump relay Camshaft position sensor (PHASE) Engine speed and cylinder number
Ignition switch Ignition signal and start signal
The ECM activates the fuel pump for several seconds after the ignition switch is turned on to improve engine
startability. If the ECM receives a 180É signal from the camshaft position sensor, it knows that the engine is
rotating, and causes the pump to perform. If the 180É signal is not received when the ignition switch is on, the
engine stalls. The ECM stops pump operation and prevents battery discharging, thereby improving safety. The
ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump relay, which in turn controls the
fuel pump.
Condition Fuel pump operation
Ignition switch is turned to ON. Operates for 1 second
Engine running and cranking Operates
When engine is stopped (Signal is not sent from crankshaft position sensor
and camshaft position sensor.)Stops in 1.5 seconds
Except as shown aboveStops
SEF605X
Component DescriptionNJEC0501A turbine type design fuel pump is used in the fuel tank.
CONSULT-II Reference Value in Data Monitor
Mode
NJEC0445
MONITOR ITEM CONDITION SPECIFICATION
FUEL PUMP RLY+Ignition switch is turned to ON (Operates for 1 second)
+Engine running and cranking
+When engine is stopped (stops in 1.5 seconds)ON
+Except as shown above OFF
FUEL PUMPQG
System Description
EC-464

Fuel Injection Control System
DESCRIPTIONNJEC0612System DescriptionNJEC0612S01Three types of fuel injection control are provided to accommodate engine operating conditions; normal control,
idle control and start control. The ECM determines the appropriate fuel injection control. Under each control,
the amount of fuel injected is compensated to improve engine performance.
Pulse signals are exchanged between ECM and electronic control fuel injection pump (control unit is built-in).
The fuel injection pump control unit performs duty control on the spill valve (built into the fuel injection pump)
according to the input signals to compensate the amount of fuel injected to the preset value.
Start ControlNJEC0612S02Input/Output Signal ChartNJEC0612S0201
Sensor Input Signal to ECM ECM Function Actuator
Engine coolant temperature sensor Engine coolant temperature
Fuel injection
control (start
control)Electronic control fuel
injection pump Crankshaft position sensor (TDC) Engine speed
Ignition switch Start signal
SEF648S
When the ECM receives a start signal from the ignition switch, the ECM adapts the fuel injection system for
the start control. The amount of fuel injected at engine starting is a preset program value in the ECM. The
program is determined by the engine speed and engine coolant temperature.
For better startability under cool engine conditions, the lower the coolant temperature becomes, the greater
the amount of fuel injected. The ECM ends the start control when the engine speed reaches the specific value,
and shifts the control to the normal or idle control.
Idle ControlNJEC0612S03Input/Output Signal ChartNJEC0612S0301
Sensor Input Signal to ECM ECM Function Actuator
Engine coolant temperature sensor Engine coolant temperature
Fuel injection
control (Idle con-
trol)Electronic control fuel
injection pump Crankshaft position sensor (TDC) Engine speed
Battery Battery voltage
Accelerator position switch Idle position
Vehicle speed sensor Vehicle speed
Air conditioner switch Air conditioner signal
When the ECM determines that the engine speed is at idle, the fuel injection system is adapted for the idle
control. The ECM regulates the amount of fuel injected corresponding to changes in load applied to the engine
to keep engine speed constant. The ECM also provides the system with a fast idle control in response to the
engine coolant temperature signal.
ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTIONYD
Fuel Injection Control System
EC-505

JEF356Y
8. Remove the timing chain slack guide.
+Using the hexagon wrench (face to face: 6 mm, short-type)
(SST), remove the mounting bolts, then remove the timing
chain slack guide.
JEF357Y
9. Remove the timing chain tension guide.
10. Remove the secondary timing chain.
+Only the timing chain can be removed without removing the
sprockets.
JEF358Y
11. Fix the fuel injection pump sprocket.
a. Insert the positioning stopper pin (SST) in the 6 mm (0.24 in)
dia. hole of the fuel injection pump sprocket.
b. Using the torx wrench (SST), turn the pump shaft gradually to
adjust the hole position of the fuel injection pump sprocket.
c. Insert the positioning stopper pin through the fuel injection
pump body to fix the sprocket.
JEF359Y
+Insert the positioning stopper pin until its flange contacts the
fuel injection pump sprocket.
d. Remove the torx wrench (SST).
BASIC SERVICE PROCEDUREYD
Electronic Control Fuel Injection Pump (Cont'd)
EC-515

JEF360Y
JEF361Y
12. Using the hexagon wrench (face to face: 6 mm, long-type)
(SST), remove the mounting bolts of the fuel injection pump
sprocket.
+It is not necessary to remove the washer of the fuel injection
pump sprocket.
JEF362Y
JEF363Y
13. Using the sprocket holder (SST), hold the fuel injection pump
sprocket to prevent falling.
+When the sprocket holder is installed, if the positioning stop-
per pin interferes, pull out the stopper pin approximately 10
mm (0.39 in), then install it.
+After the sprocket holder is installed temporarily, insert the
extension bar (SST) and Torx socket in the three holes A. After
positioning the holes, tighten the holder mounting bolts. (Refer
to the step 14 about the tool.)
+The length of the sprocket holder mounting bolts should be
approximately 15 mm (0.59 in) (M6 thread length).
+Make sure that the a- and b-faces of the sprocket holder con-
tact the bottom side of the sprocket 15 mm (0.59 in) (small
diameter side).
CAUTION:
Do not remove the sprocket holder until the fuel injection
pump is installed.
+After the sprocket holder is installed, pull out the positioning
stopper pin (SST) from the fuel injection pump sprocket.
JEF364Y
14. Using the extension bar [SST: whole length 43 mm (1.69 in)]
and the Torx socket (Q6-E12: commercially available), remove
the mounting bolts, them remove the fuel injection pump
toward the rear of the engine.
+Even after all the mounting bolts are removed, the fuel injec-
tion pump is still held by a dowel pin.
CAUTION:
Do not disassemble or adjust the fuel injection pump.
BASIC SERVICE PROCEDUREYD
Electronic Control Fuel Injection Pump (Cont'd)
EC-516

JEF360Y
7. Using the hexagon wrench (face to face: 6 mm, long-type)
(SST), tighten the sprocket mounting bolt.
+When the washer of the fuel injection pump sprocket is
removed, install it with the marking ªFº (front) facing the front
of the engine.
8. Pull out the positioning stopper pin (SST).
JEF368Y
9. Install the secondary timing chain.
+Align the alignment marks of the sprockets and those of the
chain, then install it.
+The figure shows the installation state and names of the sec-
ondary timing chain and other related parts.
10. Install timing chain tension guide.
+The upper installation bolt is longer than the lower.
JEF356Y
11. Using a hexagon wrench (face to face: 6 mm, short-type)
(SST), install the timing chain slack guide.
JEF355Y
12. Install the chain tensioner.
a. Push the plunger of the chain tensioner, then hold it with a tool
such as a push pin, and install it.
b. Using a hexagon wrench (face to face: 5 mm) (SST), tighten
the mounting bolts.
+Installation is possible by a multi-purpose tool also.
c. Pull out the tool such as a push pin which holds the plunger.
+Make sure that the alignment marks of the sprockets and
timing chain are aligned.
BASIC SERVICE PROCEDUREYD
Electronic Control Fuel Injection Pump (Cont'd)
EC-518

Supplemental Restraint System (SRS) ªAIR
BAGº and ªSEAT BELT PRE-TENSIONERº
NJAT0249The Supplemental Restraint System such as ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº used along with
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS system composition which is available to NISSAN MODEL N16 is as follows (The compo-
sition varies according to the destination and optional equipment.):
+For a frontal collision
The Supplemental Restraint System consists of driver air bag module (located in the center of the steer-
ing wheel), front passenger air bag module (located on the instrument panel on passenger side), front seat
belt pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.
+For a side collision
The Supplemental Restraint System consists of front side air bag module (located in the outer side of front
seat), side air bag (satellite) sensor, diagnosis sensor unit (one of components of air bags for a frontal
collision), wiring harness, warning lamp (one of components of air bags for a frontal collision).
Information necessary to service the system safely is included in theRS sectionof this Service Manual.
WARNING:
+To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance should be per-
formed by an authorized NISSAN dealer.
+Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the RS section.
+Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. Spiral cable and wiring harnesses covered with yellow insulation tape either just
before the harness connectors or for the complete harness are related to the SRS.
Precautions for On Board Diagnostic (EURO-
OBD) System of A/T and Engine Ð Euro-OBD
Ð
NJAT0245The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:
+Be sure to turn the ignition switch ªOFFº and disconnect the negative battery terminal before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc.
will cause the MIL to light up.
+Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MIL to light up due to an open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
+Be sure to route and secure the harnesses properly after work. Interference of the harness with a
bracket, etc. may cause the MIL to light up due to a short circuit.
+Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MIL to light up due to a malfunction of the EGR system or fuel injection system,
etc.
+Be sure to erase the unnecessary malfunction information (repairs completed) from the TCM and
ECM before returning the vehicle to the customer.
SEF289H
PrecautionsNJAT0246+Before connecting or disconnecting the TCM harness
connector, turn ignition switch OFF and disconnect nega-
tive battery terminal. Failure to do so may damage the
TCM. Because battery voltage is applied to TCM even if
ignition switch is turned off.
PRECAUTIONS
Supplemental Restraint System (SRS) ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº
AT-7

SFA975B
BALANCING WHEELSNJSU0042Preliminary InspectionNJSU0042S011. Check tires for wear and improper inflation.
2. Check wheels for deformation, cracks and other damage.
If deformed, remove wheel and check wheel runout.
a. Remove tire from wheel and mount wheel on a tire balance
machine.
b. Set dial indicator as shown in the illustration.
Wheel runout (Dial indicator value):
Refer to SDS, SU-15.
3. Check front wheel bearings for looseness.
4. Check front suspension for looseness.
5. Check steering linkage for looseness.
6. Check that front shock absorbers work properly.
7. Check vehicle posture (Unladen).
SMA829C
TIRE ROTATIONNJSU0043+Do not include the T-type spare tire when rotating the tires.
Wheel nuts:
: 98 - 118 N´m (10.0 - 12.0 kg-m, 72 - 87 ft-lb)
FRONT WHEEL ALIGNMENTNJSU0045Before checking front wheel alignment, be sure to make a prelimi-
nary inspection (Unladen*).
*: Fuel, radiator coolant and engine oil full. Spare tire, jack, hand
tools and mats in designated positions.
SRA096A
Camber, Caster and Kingpin InclinationNJSU0045S01Camber, caster and kingpin inclination are preset at factory
and cannot be adjusted.
1. Measure camber, caster and kingpin inclination of both right
and left wheels with a suitable alignment gauge.
Camber, caster and kingpin inclination:
Refer to SDS, SU-14.
2. If camber, caster or kingpin inclination is not within
specification, inspect front suspension parts. Replace dam-
aged or worn out parts.
FRONT SUSPENSION
On-vehicle Service (Cont'd)
SU-7

Service Data and Specifications (SDS)
GENERAL SPECIFICATIONS (FRONT)=NJSU0020
Applied model QG15DE QG18DE YD22T
Suspension type Independent MacPherson strut
Shock absorber type Double-acting hydraulic
Stabilizer bar *1 Standard Standard
*1: Option for LX grade.
FRONT WHEEL ALIGNMENT (UNLADEN*1)NJSU0021
Standard
QG enigne YD engine
Camber
Degree minute (Decimal degree)Minimum þ1É05¢(þ1.08É) þ1É07¢(þ1.12É)
Nominal þ0É20¢(þ0.33É) þ0É22¢(þ0.37É)
Maximum 0É25¢(0.42É) 0É23¢(0.38É)
Left and right difference 45¢(0.75É)
Caster
Degree minute (Decimal degree)Minimum 0É54¢(0.90É) 0É53¢(0.88É)
Nominal 1É39¢(1.65É) 1É38¢(1.63É)
Maximum 2É24¢(2.40É) 2É23¢(2.38É)
Left and right difference 45¢(0.75É)
Kingpin inclination
Degree minute (Decimal degree)Minimum 13É52¢(13.87É) 13É55¢(13.92É)
Nominal 14É37¢(14.62É) 14É40¢(14.67É)
Maximum 15É22¢(15.37É) 15É25¢(15.42É)
Total toe-inDistance (A þ B)
mm (in)Minimum 1 (0.04) 1.5 (0.059)
Nominal 2 (0.08) 2.5 (0.098)
Maximum 3 (0.12) 3.5 (0.138)
Angle (left plus right)
Degree minute (Decimal degree)Minimum 0É06¢(0.10É) 0É08¢(0.13É)
Nominal 0É11¢(0.18É) 0É14¢(0.23É)
Maximum 0É17¢(0.28É) 0É20¢(0.33É)
Wheel turning angle
Full turn*2Inside
Degree minute (Decimal degree)Minimum 34É00¢(34.00É)
Nominal 37É00¢(37.00É)
Maximum 38É00¢(38.00É)
Outside
Degree minute (Decimal degree)Nominal 31É00¢(31.00É)
*1: Fuel, radiator coolant and engine oil full. Spare tire, jack, hand tools and mats in designated positions.
*2: On power steering models, wheel turning force (at circumference of steering wheel) of 98 to 147 N (10 to 15 kg, 22 to 33 lb) with
engine idle.
LOWER BALL JOINTNJSU0022
Swinging force ªAº
(Measuring point: cotter pin hole of ball stud) N (kg, lb)7.8 - 824 (0.8 - 84, 1.8 - 185)
Turning torque ªBº N´m (kg-cm, in-lb) 0.50 - 4.90 (5.1 - 50.0, 4.4 - 43.4)
Vertical end play ªCº mm (in)0 (0)
FRONT SUSPENSION
Service Data and Specifications (SDS)
SU-14