fuel pressure NISSAN PICK-UP 1998 Owner's Manual

Description
This system prevents fuel filter from clogging with fuel wax.
Fuel heater system operates when fuel temperature switch and
oil pressure switch are on.
Fuel temperature switch turns on when fuel temperature
decreases below þ15ÉC (5ÉF). It remains on until fuel tempera-
ture increases to around 0ÉC (32ÉF).
If fuel temperature does not decrease below þ15ÉC (5ÉF), fuel
temperature switch will not turn on even though fuel temperature
is below 0ÉC (32ÉF).
DEC035
SEF541D
SEF411FA
FUEL HEATER SYSTEMTD
EC-226

When installing, use a new O-ring.
WARNING:
Do not touch the cooled fuel temperature switch with your
bare hand.
Oil pressure switch
1. Run engine at about 1,000 rpm.
2. Check continuity for oil pressure switch.
3. If oil pressure switch has malfunction, replace it.
Fuel heater relay
1. Check fuel heater relay operation.
2. If fuel heater relay does not operate, replace it.
SEF414F
SEF415F
DEC039
.)
.DEC039
FUEL HEATER SYSTEMTD
Component Inspection (Cont'd)
EC-229

General Specifications
PRESSURE REGULATOR
Fuel pressure
kPa (bar, kg/cm2, psi)
At idleApproximately
235 (2.35, 2.4, 34)
A few seconds after ignition
switch is turned OFF to ONApproximately
294 (2.94, 3.0, 43)
Inspection and Adjustment
Idle speed*1 rpm Base idle speed*3 750 25
No-load*2
(in ``N'' position)Target idle speed 800 50
Air conditioner: ON
(in ``N'' position)900 or more
Ignition timing 10É 2É BTDC
Throttle position touch
speed rpm1,000 150
*1: Feedback controlled and needs no adjustments
*2: Under the following conditions:
lAir conditioner switch: OFFlSteering wheel: Kept in straight-ahead positionlElectrical load: OFF (Lights, heater fan & rear window defog-
ger)
*3: Throttle position sensor connector is disconnected.
IGNITION COIL
Primary voltage V Battery voltage (11 - 14)
Primary resistance
[at 25ÉC (77ÉF)]WLess than 1.0
Secondary resistance
[at 25ÉC (77ÉF)] kW7-13
MASS AIR FLOW SENSOR
Supply voltage V Battery voltage (11 - 14)
Output voltage at idle V1.3 - 1.7 at idle*
1.7 - 2.1 at 2,500 rpm*
*: Engine is warmed up sufficiently and running under no-load.
ENGINE COOLANT TEMPERATURE
SENSOR
Temperature ÉC (ÉF) Resistance
20 (68) 2.1 - 2.9 kW
50 (122) 0.68 - 1.00 kW
90 (194) 0.236 - 0.260 kW
FUEL PUMP
Resistance [at 25ÉC (77ÉF)]W0.2 - 5.0
IACV-AAC VALVE
Resistance [at 25ÉC (77ÉF)]WApproximately 10.0
INJECTOR
Resistance [at 25ÉC (77ÉF)]W10-14
RESISTOR
Resistance [at 25ÉC (77ÉF)] kWApproximately 2.2
THROTTLE POSITION SENSOR
Throttle valve conditions Resistance [at 25ÉC (77ÉF)]
Completely closed Approximately 0.6 kW
Partially open 0.6 - 4.0 kW
Completely open Approximately 4.0 kW
HEATED OXYGEN SENSOR HEATER
Resistance [at 25ÉC (77ÉF)]W2.3 - 4.3
INTAKE AIR TEMPERATURE SENSOR
Temperature ÉC (ÉF) Resistance
20 (68) 2.1 - 2.9 kW
80 (176) 0.27 - 0.38 kW
SERVICE DATA AND SPECIFICATIONS (SDS)KA
EC-232

Injection Pump Calibration Standard
Injection pump assembly No.104780-4951/
104780-4961
Part No.16700 3S300/
106700 3S301Pump rotation: ClockwiseÐviewed from drive side
1. Test conditions
1 - 1 Nozzle: 105780-0060 (NP-DN0SD1510) 1 - 4 Injection pipe: 2 dia. x 6 dia. x 450 mm (0.08 dia. x 0.24 dia. x 17.72 in)
1 - 2 Nozzle holder: 105780-2150 1 - 5 Fuel oil temperature: 45
+5
0ÉC (113+9
0ÉF)
1 - 3 Nozzle opening pressure: 13,000+300
0kPa
(130.0+3.0
0bar,
133+3
0kg/cm2,
1,891+43
0psi)1 - 6 Supply pump pressure: 20 kPa (0.20 bar, 0.2 kg/cm
2, 2.8 psi)
2. SettingPump speed
rpmSettingsCharge air press
kPa
(mbar, mmHg, inHg)Difference in delivery
m!(Imp fl oz)
2 - 1 Timing device travel 1,100ON 3.4 - 4.2 mm (0.134 - 0.165 in)
OFF 1.8 - 2.2 mm (0.071 - 0.087 in)
ÐÐ
2 - 2 Supply pump pressure 1,100ON 471 - 549 kPa
(4.71 - 5.49 bar, 4.8 - 5.6 kg/cm
2,
68 - 80 psi)
OFF 402 - 461 kPa
(4.02 - 4.61 bar, 4.1 - 4.7 kg/cm
2,
58 - 67 psi)Ð
2 - 3 Full-load delivery 1,10046.9 - 47.9 m!
(1.65 - 1.69 Imp fl oz)/1,000 st3.5 (0.12)
2 - 4 Idle speed regulation 3755.1 - 9.1 m!
(0.18 - 0.32 Imp fl oz)/1,000 st2.0 (0.07)
2 - 5 Start 10045.0 - 80.0 m!
(1.58 - 2.82 Imp fl oz)/1,000 stÐ
2 - 6 Full-load speed regulation 2,50012.9 - 16.9 m!
(0.45 - 0.59 Imp fl oz)/1,000 stÐ
2 - 7 Load timer adjustment 1,100 0.1 - 0.5 mm (0.004 - 0.020 in) Ð
3. Test specifications Solenoid timer ON OFF
3 - 1 Timing deviceN = rpm
mm (in)1,100
3.3 - 4.3
(0.130 - 0.169)2,150
7.3 - 8.2
(0.287 - 0.323)700
Below 0.8
(0.031)1,100
1.7 - 2.3
(0.067 - 0.091)2,150
6.3 - 7.5
(0.248 - 0.295)
3 - 2 Supply pumpN = rpm
kPa (bar,
kg/cm
2, psi)1,100
392 - 471
(3.92 - 4.71,
4.0 - 4.8,
57 - 68)2,150
618 - 696
(6.18 - 6.96,
6.3 - 7.1,
90 - 101)
3-3Overflow deliv-
eryN = rpm
m!(Imp fl oz)/
min.1,100
310 - 570
(10.9 - 20.1)Ð
3 - 4 Fuel injection quantities
Speed control
lever positionPump speed
rpmFuel delivery
m!(Imp fl oz)/
1,000 stCharge air press
kPa (mbar,
mmHg, inHg)
Max. speed1,10046.4 - 48.4
(1.63 - 1.70)
Ð 50041.3 - 47.3
(1.45 - 1.66)*
2,15041.2 - 48.2
(1.45 - 1.70)*
2,50011.9 - 17.9
(0.42 - 0.63)
2,700 Below 5.0 (0.18)
Switch OFF
Magnet valve375 0 (0) Ð
Idling 3754.6 - 9.6
(0.16 - 0.34)Ð
3 - 5 SolenoidMax. cut-in voltage: 8V
Test voltage: 12 - 14V
ON: Solenoid timer is ON. *: Reference value
OFF: Solenoid timer is OFF.
If there is no designation in the specifications for the Solenoid Timer's ON-OFF position, then the position should be regarded as OFF.
4. Dimensions
K 3.2 - 3.4 mm (0.126 - 0.134 in)
KF 5.7 - 5.9 mm (0.224 - 0.232 in)
MS 0.9 - 1.1 mm (0.035 - 0.043 in)
BCS Ð
Pre-stroke 0.08 - 0.12 mm (0.0031 - 0.0047 in)
Control lever angle
a51.5 - 59.5 degree
b31.0 - 41.0 degree
gÐ
SERVICE DATA AND SPECIFICATIONS (SDS)TD
EC-234

Control lever angle measurement position
Measure the control lever angles (a,b).
Load timer adjustment
1. Fix the control lever in the position satisfying the following conditions.
Pump speed: 1,100 rpm
Fuel injection quantity: 33.0 0.5 m!(1.16 0.02 Imp fl oz)/1,000 st
2. With the control lever positioned as described in 1. above, adjust the governor sleeve so that the timer
stroke conforms to the specified values (item2-7).
Control lever position Specified values
Pump speed
rpmFuel injection quantity
m!(Imp fl oz)/1,000 stBoost pressure
kPa (mbar, mmHg, inHg)Timer stroke
mm (in)Timer stroke
reduction value
mm (in)
1,10033.0 1.0
(1.16 0.04)Ð 1.7 (0.067)0.3 0.3
(0.012 0.012)
1,10020.0 2.5
(0.70 0.09)*Ð 1.1 (0.043)*0.9 0.4
(0.035 0.016)*
*: Reference value
Potentiometer adjustment
1. Hold the control lever in the idling position.
2. Adjust the potentiometer so that the output voltage is 5.64 0.03V. Then fix the potentiometer.
3. After adjusting the potentiometer, remove the dummy bolt and then confirm the potentiometer's output
voltage specifications below.
Pump speed
rpmFuel injection q'ty
m!(Imp fl oz)/1,000 stOutput voltage
VControl lever angle Remarks
1,075 23.3 1.0 (0.82 0.04) 5.64 0.03 Ð Adjusting point
Ð 1.34 (0.05)* Ð Idle Check point
Ð Above 9.7 Ð Full Check point
*: Reference value(Input voltage: 10V)
DEF011
SERVICE DATA AND SPECIFICATIONS (SDS)TD
Injection Pump Calibration Standard (Cont'd)
EC-235

Bulb Replacement
The headlamp is a semi-sealed beam type which uses a replace-
able halogen bulb. The bulb can be replaced from the engine
compartment side without removing the headlamp body.
lGrasp only the plastic base when handling the bulb.
Never touch the glass envelope.
1. Disconnect the battery cable.
2. Disconnect the harness connector from the back side of the
bulb.
3. Pull off the rubber cap.
4. Push and raise retaining pin to loosen it.
5. Remove the headlamp bulb carefully. Do not shake or rotate
the bulb when removing it.
6. Install in the reverse order of removal.
CAUTION:
Do not leave headlamp reflector without bulb for a long
period of time. Dust, moisture, smoke, etc. entering head-
lamp body may affect the performance of the headlamp.
Remove headlamp bulb from the headlamp reflector just
before a replacement bulb is installed.
Aiming Adjustment
When performing headlamp aiming adjustment, use an aiming
machine, aiming wall screen or headlamp tester. Aimers should
be in good repair, calibrated and operated in accordance with
respective operation manuals.
If any aimer is not available, aiming adjustment can be done as
follows:
For details, refer to the regulations in your own country.
a. Keep all tires inflated to correct pressures.
b. Place vehicle and tester on one and same flat surface.
c. See that there is no-load in vehicle (coolant, engine oil
filled up to correct level and full fuel tank) other than the
driver (or equivalent weight placed in driver's position).
CAUTION:
Be sure aiming switch is set to ``0'' when performing aiming
adjustment on vehicles equipped with headlamp aiming
control.
GEL187
SEL226P
HEADLAMP Ð Conventional Type Ð
EL-49

Electrical Components Inspection
FUEL WARNING LAMP SENSOR CHECK
lIt will take a short time for the bulb to light.
OIL PRESSURE SWITCH CHECK
Oil pressure
kPa (bar, kg/cm2, psi)Continuity
Engine startMore than 10 - 20
(0.10 - 0.20, 0.1 - 0.2,1-3)NO
Engine stopLess than 10 - 20
(0.10 - 0.20, 0.1 - 0.2,1-3)YES
Check the continuity between the terminals of oil pressure switch
and body ground.
DIODE CHECK
lCheck continuity using an ohmmeter.
lDiode is functioning properly if test results are as shown in
the figure at left.
NOTE: Specification may vary depending on the type of
tester. Before performing this inspection, be sure to
refer to the instruction manual for the tester to be
used.
lDiodes for warning lamps are built into the combination meter
printed circuit.
GEL191
MEL425F
SEL901F
GEL192
WARNING LAMPS
EL-116

Use the chart below to find out what each wiring diagram code
stands for.
Refer to the wiring diagram code in the alphabetical index to find
the location (page number) of each wiring diagram.
Code Section Wiring Diagram Name
AAC/V EC IACV-AAC Valve
ABS BR Anti-lock Brake System
A/C, M HA Manual Air Conditioner
AUDIO EL Audio
BACK/L EL Back-up Lamp
BUZZER EL Warning Buzzer
CHARGE EL Charging System
CHOKE EC Automatic Choke
CIGAR EL Cigarette Lighter
CLOCK EL Clock
CMPS EC Camshaft Position Sensor
COOL/F LC Cooling Fan Control
DEF EL Rear Window Defogger
DIMDIP ELHeadlamp Ð With Dim-dip Lamp
System
D/LOCK EL Power Door Lock
DTRL ELHeadlamp Ð With Daytime Light
System
ECTS ECEngine Coolant Temperature
Sensor
EGRC/V EC EGRC Ð Solenoid Valve
FCUT EC Fuel Cut Solenoid Valve
F/HEAT EC Fuel Heater System
FICD EC IACV-FICD Solenoid Valve
FIPOT EC ISC-FI Pot
FPCM EC Fuel Pump Control Module
F/PUMP EC Fuel Pump
F/RTN EC Fuel Return Control Solenoid Valve
GLOW EC Quick-glow System
H/AIM EL Headlamp Aiming Control
HEATER HA Heater
H/LAMP EL Headlamp
HLC EL Headlamp Washer
HO2S EC Heated Oxygen Sensor
HORN EL Horn
H/SEAT EL Heated Seat
IATS EC Intake Air Temperature Sensor
IDLE EC IACV-Idle Up ControlCode Section Wiring Diagram Name
IGN EC Ignition System
IGN/SG EC Ignition Signal
ILL EL Illumination
INJECT EC Injector
INT/L EL Interior and Spot Lamps
MAFS EC Mass Air Flow Sensor
MAIN ECMain Power Supply and Ground Cir-
cuit
METER ELSpeedometer, Tachometer, Temp.
and Fuel Gauges
MIL/DL ECMIL and Data Link Connector For
CONSULT
MIRROR EL Power Door Mirror
MULTI EL Multi-remote Control System
NATS EL Nissan Anti-theft System
P/ANT EL Power Antenna
PGC/V ECCanister Purge
Control Solenoid Valve
PLA EC Partial Load Advance Control
PNP/SW EC Park/Neutral Position Switch
POWER EL Power Supply Routing
PST/SW EC Power Steering Oil Pressure Switch
R/FOG EL Rear Fog Lamp
SRS RS Supplemental Restraint System
S/SIG EC Start Signal
START EL Starting System
STOP/L EL Stop Lamp
SWL/V ECSwirl Control Valve Control Solenoid
Valve
TAIL/L EL Parking, License and Tail Lamps
TPS EC Throttle Position Sensor
TURN ELTurn Signal and Hazard Warning
Lamps
VSS EC Vehicle Speed Sensor
WARN EL Warning Lamps
WINDOW EL Power Window
WIPER EL Front Wiper and Washer
WIRING DIAGRAM CODES (CELL CODES)
EL-253

Measurement of Compression Pressure
1. Warm up engine.
2. Turn ignition switch OFF.
3. Release fuel pressure.
Refer to EC section (``Fuel Pressure Release'', ``BASIC SER-
VICE PROCEDURE'').
4. Remove all spark plugs.
5. Disconnect distributor center cable.
6. Attach a compression tester to No. 1 cylinder.
7. Depress accelerator pedal fully to keep throttle valve wide
open.
8. Crank engine and record highest gauge indication.
9. Repeat the measurement on each cylinder.
lAlways use a fully-charged battery to obtain specified
engine speed.
Compression pressure:
kPa (bar, kg/cm
2, psi)/rpm
Standard
1,324 (13.24, 13.5, 192)/300
Minimum
981 (9.8, 10, 142)/300
Difference limit between cylinders
98 (0.98, 1.0, 14)/300
10. If compression in one or more cylinders is low:
a. Pour a small amount of engine oil into cylinders through
spark plug holes.
b. Retest compression.
lIf adding oil helps compression, piston rings may be
worn or damaged. If so, replace piston rings after check-
ing piston.
lIf pressure stays low, a valve may be sticking or seating
improperly. Inspect and repair valve and valve seat.
(Refer to SDS.) If valve or valve seat is damaged
excessively, replace them.
lIf compression stays low in two cylinders that are next
to each other:
a. The cylinder head gasket may be leaking, or
b. Both cylinders may have valve component damage.
Inspect and repair as necessary.
SEM113B
COMPRESSION PRESSUREKA
EM-10

CAUTION:
lWhen installing rocker arms, camshaft and oil seal, lubri-
cate contacting surfaces with new engine oil.
lWhen tightening cylinder head bolts and rocker shaft
bolts, lubricate bolt threads and seat surfaces with new
engine oil.
lHydraulic valve lifters are installed in each rocker arm.
If hydraulic valve lifter is kept on its side, even when
installed in rocker arm, there is a risk of air entering it.
When rocker arms are removed, stand them straight up
or soak them in new engine oil.
lDo not disassemble hydraulic valve lifter.
lAttach tags to valve lifters so as not to mix them up.
Removal
1. Release fuel pressure. Refer to EC section (``Fuel Pressure
Release'').
2. Drain coolant from radiator and drain plug of block.
3. Remove the following parts.
lPower steering drive belt
lPower steering pump, idler pulley and power steering brack-
ets
lVacuum hoses of swirl control valve and pressure control
solenoid valve
lAccelerator wire bracket
4. Remove bolts which hold intake manifold collector to intake
manifold.
5. Remove bolts which hold intake manifold to cylinder head
while raising collector upwards.
6. Remove exhaust manifold cover and exhaust manifold.
7. Remove rocker cover.
lWhen removing rocker cover, do not hit rocker cover
against rocker arm.
8. Set No. 1 piston at TDC on its compression stroke.
SEM878BA
SEM868BA
.NG
SEM216C
CYLINDER HEADKA
Rear Oil Seal
EM-25