1998 NISSAN PICK-UP checking oil

Checking Brake Fluid Level
lCheck fluid level in reservoir tank. It should be between Max
and Min lines on reservoir tank.
lIf fluid level is extremely low, check brake system for leaks.
lIf the brake warning lamp comes on, check brake fluid level
switch and parking brake switch.
Checking Brake Line
CAUTION:
If leakage occurs around joints, retighten or, if necessary,
replace damaged parts.
1. Check brake lines (tubes and hoses) for cracks, deterioration
or other damage. Replace any damaged parts.
2. Check for oil leakage by fully depressing brake pedal while
engine is running.
Changing Brake Fluid
CAUTION:
lRefill with new brake fluid DOT 3 or DOT 4*1.
lAlways keep fluid level higher than minimum line on
reservoir tank.
lNever reuse drained brake fluid.
lBe careful not to splash brake fluid on painted areas; it
may cause paint damage. If brake fluid is splashed on
painted areas, wash it away with water immediately.
1. Clean inside of reservoir tank, and refill with new brake fluid.
2. Connect a vinyl tube to each air bleeder valve.
3. Drain brake fluid from each air bleeder valve by depressing
brake pedal.
4. Refill until brake fluid comes out of each air bleeder valve.
Use same procedure as in bleeding hydraulic system to refill
brake fluid. Refer to ``Bleeding Brake System'', BR-4.
*1: Refer to MA section (``Fluids and Lubricants'', ``RECOM-
MENDED FLUIDS AND LUBRICANTS'').
SBR451D
SBR389C
SBR992
CHECK AND ADJUSTMENT
BR-3

TROUBLE DIAGNOSIS FOR POWER SUPPLY.... 75
Main Power Supply and Ground Circuit .............. 75
TROUBLE DIAGNOSIS FOR ``CAMSHAFT
POSI SEN'' (DTC 11).............................................. 82
Camshaft Position Sensor (CMPS) ..................... 82
TROUBLE DIAGNOSIS FOR ``MASS AIR
FLOW SEN'' (DTC 12)............................................ 89
Mass Air Flow Sensor (MAFS) ............................ 89
TROUBLE DIAGNOSIS FOR ``COOLANT TEMP
SEN'' (DTC 13)........................................................ 95
Engine Coolant Temperature Sensor (ECTS) ..... 95
TROUBLE DIAGNOSIS FOR ``IGN SIGNAL-
PRIMARY'' (DTC 21)............................................... 99
Ignition Signal ...................................................... 99
TROUBLE DIAGNOSIS FOR ``OVER HEAT''
(DTC 28)................................................................. 106
Overheat ............................................................ 106
TROUBLE DIAGNOSIS FOR ``INT AIR TEMP
SEN'' (DTC 41)...................................................... 109
Intake Air Temperature Sensor ......................... 109
TROUBLE DIAGNOSIS FOR ``THROTTLE POSI
SEN'' (DTC 43)...................................................... 113
Throttle Position Sensor .................................... 113
TROUBLE DIAGNOSIS FOR
NON-DETECTABLE ITEMS.................................. 118
Vehicle Speed Sensor (VSS) ............................ 118
Heated Oxygen Sensor (HO2S)
- LHD Models - .................................................. 123
Heated Oxygen Sensor Heater
- LHD Models - .................................................. 127
Idle Air Control Valve (IACV) - Auxiliary Air
Control (AAC) Valve .......................................... 131
Neutral Position Switch ...................................... 136
EVAP Canister Purge Control Solenoid Valve .. 140
Injector ............................................................... 144
Start Signal ........................................................ 149
Fuel Pump.......................................................... 151
Power Steering Oil Pressure Switch ................. 157
Swirl Control Valve Control Solenoid Valve ...... 161
IACV-FICD Solenoid Valve ................................ 168
MIL & Data Link Connectors ............................. 173
TD
INJECTION SYSTEM............................................ 176
Fuel System ....................................................... 176
INJECTION PUMP................................................. 178
Inspection ........................................................... 178
Removal ............................................................. 178
Installation and Adjustment................................ 180
Disassembly ....................................................... 183
Load Timer Adjustment...................................... 183
Start Q Adjustment Lever .................................. 184
INJECTION NOZZLE............................................. 186Removal and Installation ................................... 186
Disassembly ....................................................... 186
Inspection ........................................................... 187
Cleaning ............................................................. 187
Assembly............................................................ 189
Test and Adjustment .......................................... 189
FUEL SYSTEM CHECK........................................ 191
Bleeding Fuel System ........................................ 191
Bleeding Fuel Filter ............................................ 192
Checking Priming Pump .................................... 192
Checking Fuel Filter Switch ............................... 192
POSITIVE CRANKCASE VENTILATION.............. 193
Description ......................................................... 193
Inspection ........................................................... 193
QUICK-GLOW SYSTEM........................................ 194
Component Parts Location ................................ 194
Circuit Diagram .................................................. 195
Description ......................................................... 196
Wiring Diagram .................................................. 197
Glow Control Unit Circuit Inspection (For Cold
Areas)................................................................. 203
Glow Control Unit Circuit Inspection (Except
for Cold Areas)................................................... 206
Component Inspection ....................................... 208
EGR SYSTEM........................................................ 210
Component Parts Location ................................ 210
Description ......................................................... 211
Operation ........................................................... 212
Wiring Diagram .................................................. 213
System Inspection.............................................. 217
Component Inspection ....................................... 218
SOLENOID TIMER................................................ 220
Description ......................................................... 220
Operation ........................................................... 220
Wiring Diagram .................................................. 222
Inspection ........................................................... 224
FUEL CUT SYSTEM.............................................. 225
Wiring Diagram .................................................. 225
FUEL HEATER SYSTEM...................................... 226
Description ......................................................... 226
Wiring Diagram .................................................. 227
System Inspection.............................................. 228
Component Inspection ....................................... 228
FAST IDLE CONTROL CIRCUIT.......................... 230
Wiring Diagram .................................................. 230
Electrical Components Inspection ..................... 231
KA
SERVICE DATA AND SPECIFICATIONS (SDS). 232
General Specifications ....................................... 232
Inspection and Adjustment ................................ 232

FUNCTION TEST
ITEMCONDITION JUDGEMENT CHECK ITEM (REMEDY)
PW/ST SIGNAL
CIRCUIT
lIgnition switch: ON
(Engine running)
lPower steering oil pressure switch
circuit is tested when steering
wheel is rotated fully and then set
to a straight line running position.Locked position ONlHarness and connector
lPower steering oil pressure switch
lPower steering oil pump
Neutral position OFF
SWRL CONT S/V
CIRCUIT
lIgnition switch: ON
(Engine stopped)
lSwirl control valve control sole-
noid valve circuit is tested by
checking solenoid valve operating
sound.The solenoid valve makes an
operating sound every 3 sec-
onds.
lHarness and connector
lSolenoid valve
lSwirl control valve
lVacuum hose
VEHICLE SPEED
SEN CKT
lVehicle speed sensor circuit is
tested when vehicle is running at
a speed of 10 km/h (6 MPH) or
higher.Vehicle speed sensor input
signal is greater than 4 km/h
(2 MPH).lHarness and connector
lVehicle speed sensor
lSpeedometer
IGN TIMING ADJ
lAfter warming up, idle the engine.
lIgnition timing is checked by read-
ing ignition timing with a timing
light and checking whether it
agrees with specifications.The timing light indicates the
same value on the screen.
lAdjust ignition timing (by moving
camshaft position sensor or
distributor)
lCamshaft position sensor drive
mechanism
MIXTURE RATIO
TEST
lAir-fuel ratio feedback circuit
(injection system, ignition system,
vacuum system, etc.) is tested by
examining the heated oxygen
sensor output at 2,000 rpm under
non-loaded state.Heated oxygen sensor
COUNT: More than 5 times
during 10 seconds
lINJECTION SYS (Injector, fuel
pressure regulator, harness or
connector)
lIGNITION SYS (Spark plug,
ignition coil, power transistor
harness or connector)
lVACUUM SYS (Intake air leaks)
lHeated oxygen sensor circuit
lHeated oxygen sensor operation
lFuel pressure high or low
lMass air flow sensor
POWER BALANCE
lAfter warming up, idle the engine.
lInjector operation of each cylinder
is stopped one after another, and
resultant change in engine rota-
tion is examined to evaluate com-
bustion of each cylinder. (This is
only displayed for models where a
sequential multiport fuel injection
system is used.)Difference in engine speed is
greater than 25 rpm before
and after cutting off the injec-
tor of each cylinder.lInjector circuit (Injector, harness
or connector)
lIgnition circuit (Spark plug, igni-
tion coil, power transistor harness
or connector)
lCompression
lValve timing
IACV-AAC/V
SYSTEM
lAfter warming up, idle the engine.
lIACV-AAC valve system is tested
by detecting change in engine
speed when IACV-AAC valve
opening is changed to 0%, 20%
and 80%.Difference in engine speed is
greater than 150 rpm between
when valve opening is at 80%
and at 20%.
lHarness and connector
lIACV-AAC valve
lAir passage restriction between
air inlet and IACV-AAC valve
lIAS (Idle adjusting screw) adjust-
ment
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONKA
CONSULT (Cont'd)
EC-52

Overheat
ON BOARD DIAGNOSIS LOGIC
If the cooling fan or another component in the cooling system malfunctions, the engine coolant temperature
will rise.
When the engine coolant temperature reaches an abnormally high temperature condition, a malfunction is
indicated.
Diagnostic trouble
code No.Malfunction is detected when ...Check Items
(Possible Cause)
28
lEngine coolant temperature reaches an abnormally
high temperature.lCooling fan
lRadiator hose
lRadiator
lRadiator cap
lWater pump
lThermostat
For more information, refer to ``MAIN 12
CAUSES OF OVERHEATING'', EC-108.
CAUTION:
When a malfunction is indicated, be sure to replace the coolant following the procedure in MA sec-
tion (``Changing Engine Coolant'', ``ENGINE MAINTENANCE''). Also, replace the engine oil.
lFill radiator with coolant up to specified level with a filling speed of 2 liters per minute like pour-
ing coolant by kettle. Be sure to use coolant with the proper mixture ratio. Refer to MA section
(``Anti-freeze Coolant Mixture Ratio'', ``RECOMMENDED FLUIDS AND LUBRICANTS'').
lAfter refilling coolant, run engine to ensure that no water-flow noise is emitted.
OVERALL FUNCTION CHECK
WARNING:
Never remove the radiator cap when the engine is hot. Seri-
ous burns could be caused by high pressure fluid escaping
from the radiator.
Wrap a thick cloth around cap. Carefully remove the cap by
turning it a quarter turn to allow built-up pressure to escape.
Then turn the cap all the way off.
1. Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is
below the proper range, skip the following step and go to
``DIAGNOSTIC PROCEDURE'' on next page.
2. Confirm whether customer filled the coolant or not. If cus-
tomer filled the coolant, go to ``DIAGNOSTIC PROCEDURE''
on next page.
AEC640
TROUBLE DIAGNOSIS FOR ``OVER HEAT'' (DTC 28)KA
EC-106

Tool number
Tool nameDescriptionEngine application
KA TD
V1ED19601000
Compression gauge
V2ED19600600
Compression gauge
adapter (for glow
plug hole)
V3ED19600700
Compression gauge
adapter (for injector
hole)
V4ED19600800
Compression gauge
adapter (Useless)
NT625
Checking compression
pressure
ÐX
KV10106001*
Oil filter wrench
NT690
Removing oil filter
ÐX
KV10105800*
Chain stopper
NT010
XÐ
V1KV11101110
Valve seat remover
V2KV11103610
Adapter (Intake)
V3KV11103620
Adapter (Exhaust)
NT251A
Removing valve seat
ÐX
V1ST15243000
Valve seat drift
V2KV11103810
Adapter (Intake)
V3KV11103820
Adapter (Exhaust)
NT252A
Installing valve seat
ÐX
PREPARATION
Special Service Tools (Cont'd)
EM-5

7. Turn wheel hub several times in both directions.
8. Retighten wheel bearing lock nut with Tool.
: 0.5 - 1.5 N´m (0.05 - 0.15 kg-m, 4.3 - 13.0 in-lb)
9. Measure wheel bearing axial end play.
Axial end play: 0 mm (0 in)
10. Measure starting force ``A'' at wheel hub bolt.
11. Install lock washer by tightening the lock nut within 15 to 30
degrees.
12. Turn wheel hub several times in both directions to seat wheel
bearing correctly.
13. Measure starting force ``B'' at wheel hub bolt. Refer to step
10.
14. Wheel bearing preload ``C'' can be calculated as shown
below.
C=BþA
Wheel bearing preload ``C'':
7.06 - 20.99 N (0.72 - 2.14 kg, 1.59 - 4.72 lb)
15. Repeat steps 3 through 14 until correct axial end play and
wheel bearing preload are obtained.
16. Install free-running hub.
Front Wheel Alignment
Before checking front wheel alignment, make a preliminary
inspection (Unladen*).
*: Fuel, radiator coolant and engine oil full. Spare tire, jack,
hand tools and mats in designated positions.
PRELIMINARY INSPECTION
1. Check tires for wear and proper inflation.
2. Check outside and inside wheel runout.
Wheel runout average
[(Outside runout value + Inside runout value) x 0.5]:
Refer to SDS, FA-35.
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 by using the
standard bounce test.
SFA845B
SMA580A
SFA830
SFA356B
ON-VEHICLE SERVICE
Front Wheel Bearing (Cont'd)
FA-7

GENERAL INFORMATION
SECTION
GI
CONTENTS
PRECAUTIONS......................................................... 1
Precautions for Supplemental Restraint
System (SRS) ``AIR BAG'' (4WD models)............. 1
Precautions for Supplemental Restraint
System (SRS) ``AIR BAG'' (2WD models)............. 1
Precautions for NATS ............................................ 2
General Precautions .............................................. 2
Precautions for Multiport Fuel Injection System
or ECCS Engine .................................................... 4
Precautions for Three Way Catalyst
(If so equipped) ...................................................... 4
Precautions for Engine Oils ................................... 4
Precautions for Fuel............................................... 5
Precautions for Air Conditioning ............................ 6
HOW TO USE THIS MANUAL.................................. 7
HOW TO READ WIRING DIAGRAMS...................... 9
Sample/Wiring Diagram - EXAMPL - .................... 9
Description ........................................................... 11
HOW TO CHECK TERMINAL................................. 18
How to Probe Connectors ................................... 18
How to Check Enlarged Contact Spring of
Terminal ............................................................... 19
Waterproof Connector Inspection ........................ 20
Terminal Lock Inspection ..................................... 20
HOW TO PERFORM EFFICIENT DIAGNOSIS
FOR AN ELECTRICAL INCIDENT......................... 21
Work Flow ............................................................ 21HOW TO PERFORM EFFICIENT DIAGNOSIS...... 22
Incident Simulation Tests..................................... 22
Circuit Inspection ................................................. 25
HOW TO FOLLOW FLOW CHART IN
TROUBLE DIAGNOSES......................................... 31
How to Follow This Flow Chart ........................... 32
CONSULT CHECKING SYSTEM............................ 34
Function and System Application ........................ 34
Lithium Battery Replacement............................... 34
Checking Equipment ............................................ 35
Loading Procedure............................................... 36
CONSULT Data Link Connector (DLC) Circuit ... 36
IDENTIFICATION INFORMATION.......................... 37
Model Variation .................................................... 37
Identification Number ........................................... 40
Dimensions .......................................................... 44
Wheels and Tires ................................................. 46
LIFTING POINTS AND TOW TRUCK TOWING..... 47
Pantograph Jack .................................................. 47
Screw Jack........................................................... 48
Garage Jack and Safety Stand ........................... 49
2-pole Lift ............................................................. 50
Tow Truck Towing ............................................... 51
Towing Point ........................................................ 53
TIGHTENING TORQUE OF STANDARD BOLTS.. 54
SAE J1930 TERMINOLOGY LIST.......................... 55
SAE J1930 Terminology List ............................... 55
GI

lAfter disconnecting vacuum or air hoses, attach a tag to
indicate the proper connection.
lUse only the fluids and lubricants specified in this manual.
lUse approved bonding agent, sealants or their equivalents
when required.
lUse tools and recommended special tools where specified
for safe and efficient service repairs.
lWhen repairing the fuel, oil, water, vacuum or exhaust
systems, check all affected lines for leaks.
lDispose of drained oil or the solvent used for cleaning parts
in an appropriate manner.
WARNING:
To prevent ECM from storing the diagnostic trouble codes,
do not carelessly disconnect the harness connectors which
are related to the ECCS system and TCM (Transmission
Control Module) system. The connectors should be discon-
nected only when working according to the WORK FLOW of
TROUBLE DIAGNOSES in EC section.
Precautions for Multiport Fuel Injection
System or ECCS Engine
lBefore connecting or disconnecting any harness connector
for the multiport fuel injection system or ECM (Engine Con-
trol Module):
Turn ignition switch to ``OFF'' position.
Disconnect negative battery terminal.
Otherwise, there may be damage to ECM.
lBefore disconnecting pressurized fuel line from fuel pump to
injectors, be sure to release fuel pressure.
lBe careful not to jar components such as ECM and mass air
flow sensor.
Precautions for Three Way Catalyst
(If so equipped)
If a large amount of unburned fuel flows into the catalyst, the
catalyst temperature will be excessively high. To prevent this,
follow the instructions below:
lUse unleaded gasoline only. Leaded gasoline will seriously
damage the three way catalyst.
lWhen checking for ignition spark or measuring engine
compression, make tests quickly and only when necessary.
lDo not run engine when the fuel tank level is low, otherwise
the engine may misfire causing damage to the catalyst.
Do not place the vehicle on flammable material. Keep flammable
material off the exhaust pipe and the three way catalyst.
Precautions for Engine Oils
Prolonged and repeated contact with used engine oil may cause
skin cancer. Try to avoid direct skin contact with used oil.
SGI787
PRECAUTIONS
General Precautions (Cont'd)
GI-4