cooling NISSAN PICK-UP 1998 Workshop Manual

Anti-freeze Coolant Mixture Ratio
The engine cooling system is filled at the factory with a high-
quality, year-round, anti-freeze coolant solution. The anti-freeze
solution contains rust and corrosion inhibitors. Therefore, addi-
tional cooling system additives are not necessary.
CAUTION:
When adding or replacing coolant, be sure to use only an
ethylene glycol anti-freeze with the proper mixture ratio. See
the following examples:
Outside temperature
down toAnti-
freezeSoft
water
ÉC ÉF
þ15 5 30% 70%
þ35 þ30 50% 50%
The use of other types of coolant solutions may damage
your cooling system.
RECOMMENDED FLUIDS AND LUBRICANTS
MA-14

Changing Engine Coolant
WARNING:
To avoid being scalded, never change the coolant when the
engine is hot.
Ð DRAINING ENGINE COOLANT Ð
1. Move heater ``TEMP'' control lever all the way to ``HOT''
position.
lMake sure that air condition switch is ``OFF''.
2. Open radiator drain plug at the bottom of radiator, and
remove radiator cap.
3. Remove reservoir tank, drain coolant, then clean reservoir
tank. Install it temporarily.
Be careful not to allow coolant to contact drive belts.
4. Remove cylinder block drain plug.
Ð FLUSHING COOLING SYSTEM Ð
5. Install and then tighten radiator drain plug and cylinder block
drain plug securely.
6. Open air relief plug.
7. Fill radiator with water and close air relief plug and radiator
cap.
8. Run engine and warm it up sufficiently.
9. Race engine 2 or 3 times under no-load.
10. Stop engine and wait until it cools down.
11. Repeat step 2 through step 10 until clear water begins to
drain from radiator.
12. Drain water.
Ð REFILLING ENGINE COOLANT Ð
lApply sealant to the thread of drain plug.
: 34-44Nzm
(3.5 - 4.5 kg-m, 25 - 33 ft-lb)
SMA917C
SMA918CA
SMA919C
SMA580C
ENGINE MAINTENANCEKA
MA-16

13. Open radiator cap and air relief plug.
14. Fill radiator with coolant up to specified level.
Follow instructions attached to anti-freeze container for mix-
ing ratio of anti-freeze to water.
For coolant mixture ratio, refer to MA-14.
Unit:!(Imp qt)
Coolant capacity:
2WD 4WD
Without reservoir tank 6.1 (5-3/8)
Reservoir tank 0.6 (1/2)
Pour coolant through coolant filler neck slowly to allow air
in system to escape.
15. Close air relief plug.
16. Remove reservoir tank, drain coolant, then clean reservoir
tank.
17. Install reservoir tank and fill it with coolant up to ``MAX'' level
and then install radiator cap.
18. Run engine and warm it up sufficiently.
19. Race engine 2 or 3 times under no-load.
20. Stop engine and cool it down, then add coolant as neces-
sary.
Checking Cooling System
CHECKING HOSES
Check hoses for proper attachment, leaks, cracks, damage,
loose connections, chafing and deterioration.
CHECKING RADIATOR CAP
Apply pressure to radiator cap by means of a cap tester to see
if it is satisfactory.
Radiator cap relief pressure:
Standard
78-98kPa
(0.78 - 0.98 bar, 0.8 - 1.0 kg/cm
2, 11 - 14 psi)
Limit
59-98kPa
(0.59 - 0.98 bar, 0.6 - 1.0 kg/cm
2,9-14psi)
Pull the negative-pressure valve to open it. Check that it closes
completely when released.
SMA182B
SMA920C
SLC769A
SMA871B
ENGINE MAINTENANCEKA
Changing Engine Coolant (Cont'd)
MA-17

CHECKING COOLING SYSTEM FOR LEAKS
Apply pressure to the cooling system with cap tester to check for
leakage.
Testing pressure:
157 kPa (1.57 bar, 1.6 kg/cm
2, 23 psi)
CAUTION:
Higher pressure than the specified value may cause damage
to the radiator.
Checking Fuel Lines
Inspect fuel lines and tank for improper attachment and for leaks,
cracks, damage, loose connections, chafing and deterioration.
If necessary, repair or replace malfunctioning parts.
CAUTION:
Tighten high-pressure rubber hose clamp so that clamp end
is 3 mm (0.12 in) from hose end.
Tightening torque specifications are the same for all rubber
hose clamps.
Ensure that screw does not contact adjacent parts.
Changing Fuel Filter
WARNING:
Before removing fuel filter, release fuel pressure from fuel
line.
1. Remove fuse for fuel pump.
2. Start engine.
3. After engine stalls, crank engine two or three times to make
sure that fuel pressure is released.
4. Turn ignition switch OFF and install fuse for fuel pump.
5. Loosen fuel hose clamps.
6. Replace fuel filter.
lBe careful not to spill fuel or engine compartment. Place
a shop towel to absorb fuel.
lUse a high-pressure type fuel filter. Do not use a syn-
thetic resinous fuel filter.
lWhen tightening fuel hose clamps, refer to ``Checking
Fuel Lines'', MA-18.
SMA990A
SMA215C
MMA104A
SMA921C
SMA922C
ENGINE MAINTENANCEKA
Checking Cooling System (Cont'd)
MA-18

Coolant capacity (With reservoir tank):
TD25 9.5!(8-3/8 Imp qt)
Reservoir tank capacity (for MAX level):
0.6!(1/2 Imp qt)
Pour coolant through coolant filler neck slowly to allow air
in system to escape.
12. Warm up engine to normal operating temperature.
13. Run engine at 2,000 rpm for 10 seconds and return to idle
speed.
lRepeat 2 or 3 times.
Watch coolant temperature gauge so as not to overheat the
engine.
14. Stop engine and cool it down.
lCool down using a fan to reduce the time.
15. Remove the radiator filler cap and check coolant level.
lIf necessary, refill radiator up to filler neck with coolant.
16. Refill reservoir tank to Max line with coolant.
17. Repeat step 12 through step 16 two or more times.
18. Warm up engine, and check for sound of coolant flow while
running engine from idle up to 2,000 rpm with heater tem-
perature control set at several positions between COOL and
HOT.
lSound may be noticeable at heater water cock.
19. If sound is heard, bleed air from cooling system by repeat-
ing steps 12 through 16 until coolant level no longer drops.
lClean excess coolant from engine.
Checking Cooling System
CHECKING HOSES AND CLAMPS
Check hoses and clamps for proper attachment, leaks, cracks,
damage, loose connections, chafing and deterioration.
CHECKING RADIATOR CAP
Apply pressure to radiator cap with cap tester to see if it is sat-
isfactory.
Radiator cap relief pressure:
78-98kPa
(0.78 - 0.98 bar, 0.8 - 1.0 kg/cm
2, 11 - 14 psi)
SMA412B
SLC613
ENGINE MAINTENANCETD
Changing Engine Coolant (Cont'd)
MA-26

Pull the negative-pressure valve to open it. Check that it closes
completely when released.
CHECKING COOLING SYSTEM FOR LEAKS
Apply pressure to the cooling system with cap tester to check for
leakage.
Testing pressure:
157 kPa (1.57 bar, 1.6 kg/cm
2, 23 psi)
CAUTION:
Use of higher pressure than the specified value may cause
damage to radiator.
Checking and Replacing Fuel Filter and
Draining Water
Be careful not to spill fuel in engine compartment. Place a
rag to absorb fuel.
CHECKING FUEL FILTER
Check fuel filter for fuel leakage, damage and other abnormal
signs.
REPLACING FUEL FILTER
1. Disconnect harness connector and drain fuel.
2. Remove 2 bolts fixing fuel filter bracket, and remove the
bracket with fuel filter. Do not remove fuel hose.
3. Install fuel filter upside down using the holes for the bolts to
fix the fuel filter bracket.
4. Remove fuel filter using band-type filter wrench.
Type A
Remove fuel filter and fuel filter sensor.
Type B
Loosen fuel filter within the extent fuel does not spill, return
fuel filter back to the normal position, then remove it.
CAUTION:
Remove fuel filter without spilling fuel. If spilt, wipe off
immediately. Be specially careful not to spill fuel on engine
mount insulator.
SMA871B
SMA990A
DMA011
DMA005
ENGINE MAINTENANCETD
Checking Cooling System (Cont'd)
MA-27

Wiring Diagram - MULTI -/LHD Models ............ 175
Trouble Diagnoses ............................................. 179
ID Code Entry Procedure .................................. 182
NATS (Nissan Anti-Theft System)/Gasoline
engine for LHD models........................................ 183
Component Parts and Harness Connector
Location.............................................................. 183
System Description ............................................ 183
System Composition .......................................... 184
Wiring Diagram - NATS -................................... 185
CONSULT .......................................................... 186
Trouble Diagnoses ............................................. 188
How to Replace NATS IMMU ............................ 197
NATS (Nissan Anti-Theft System)/Diesel
engine.................................................................... 198
Component Parts and Harness Connector
Location.............................................................. 198
System Description ............................................ 199
System Composition .......................................... 199
Wiring Diagram - NATS -/LHD Models.............. 200
Wiring Diagram - NATS -/RHD Models ............. 201
CONSULT .......................................................... 202
Trouble Diagnoses ............................................. 205LOCATION OF ELECTRICAL UNITS................... 217
Engine Compartment ......................................... 217
Passenger Compartment ................................... 218
HARNESS LAYOUT.............................................. 220
Outline ................................................................ 220
How to Read Harness Layout ........................... 221
Main Harness ..................................................... 222
Engine Room Harness....................................... 232
Engine Control Harness..................................... 240
Engine Harness ................................................. 242
Alternator Harness ............................................. 244
Instrument Harness............................................ 245
Room Lamp Harness/LHD Models .................... 246
Room Lamp Harness/RHD Models ................... 247
Chassis Harness and Tail Harness ................... 248
Front Door Harness (LH side) ........................... 249
Front Door Harness (RH side)........................... 250
Rear Door Harness ............................................ 251
BULB SPECIFICATIONS...................................... 252
Headlamp ........................................................... 252
Exterior Lamp..................................................... 252
Interior Lamp ...................................................... 252
WIRING DIAGRAM CODES (CELL CODES)....... 253
WIRING DIAGRAM REFERENCE CHART
COOLING FAN .......................................................................................................... LC SECTION
ECCS, IGNITION SYSTEM, QUICK-GLOW SYSTEM, FUEL HEATER SYSTEM .. EC SECTION
ANTI-LOCK BRAKE SYSTEM .................................................................................. BR SECTION
SRS ``AIR BAG'' ........................................................................................................ RS SECTION
HEATER AND AIR CONDITIONER .......................................................................... HA SECTION

EARTH CONNECT TO CONN. NO. CELL CODE
M1/M54 REAR COMBINATION LAMP RH (REAR FOG)
(RHD models except A-chassis)T2 EL-R/FOG
REAR COMBINATION LAMP RH (TAIL AND
STOP) (A-chassis models, and except for
Europe, Australia and China)T1 EL-TAIL/L EL-STOP/L
REAR COMBINATION LAMP RH (TAIL AND
STOP) (For Europe, Australia and China except
A-chassis models)T2 EL-TAIL/L EL-STOP/L
REAR COMBINATION LAMP RH (TURN SIG-
NAL) (A-chassis models, and except for
Europe, Australia and China)T1 EL-TURN
REAR COMBINATION LAMP RH (TURN SIG-
NAL) (For Europe, Australia and China except
A-chassis models)T2 EL-TURN
REAR FOG LAMP LH (LHD A-chassis models) T12 EL-R/FOG
REAR FOG LAMP RH (RHD A-chassis models) T10 EL-R/FOG
DOOR LOCK ACTUATOR DRIVER SIDE
(Unlock sensor)D10 EL-MULTI
LOCK KNOB SWITCH D8 EL-D/LOCK
POWER WINDOW MAIN SWITCH (Double cab) D5 EL-WINDOW EL-D/LOCK
POWER WINDOW MAIN SWITCH (Single cab
and King cab)D6 EL-WINDOW EL-D/LOCK
M33/M207
(LHD models
with KA
engine)CONDENSER M210 EC-IGN/SG
DISTRIBUTOR (POWER TRANSISTOR) M214 EC-IGN/SG
ECM (ECCS CONTROL MODULE) M32 EC-MAIN
M208
(LHD models
with KA
engine)DATA LINK CONNECTOR FOR CONSULT M11 EC-MIL/DL
DISTRIBUTOR (CAMSHAFT POSITION
SENSOR)M214 EC-CMPS
ECM (ECCS CONTROL MODULE) M32 EC-MAIN
NATS IMMU M68 EL-NATS
SHIELD WIRE (CAMSHAFT POSITION
SENSOR)M214 EC-CMPS
SHIELD WIRE (MASS AIR FLOW SENSOR) M204 EC-MAFS
SHIELD WIRE (THROTTLE POSITION
SENSOR)M302 EC-TPS
SHIELD WIRE (HEATED OXYGEN SENSOR) E3 EC-HO2S
E6/E39 NATS IMMU (Diesel engine) M69 EL-NATS
ABS ACTUATOR AND ELECTRIC UNIT E4 BR-ABS
BRAKE FLUID LEVEL SWITCH E2 EL-WARN
COOLING FAN MOTOR E24 LC-COOL/F
DAYTIME LIGHT UNIT E64 EL-DTRL
DIM-DIP LAMP UNIT E67 EL-DIMDIP
FRONT COMBINATION LAMP LH (PARKING)
(Except for Europe, Australia and China)E11 EL-TAIL/L
FRONT COMBINATION LAMP LH (PARKING)
(For Europe, Australia and China)E12 EL-TAIL/L
FRONT COMBINATION LAMP LH (TURN SIG-
NAL) (Except for Europe, Australia and China)E11 EL-TURN
FRONT COMBINATION LAMP LH (TURN SIG-
NAL) (For Europe, Australia and China)E12 EL-TURN
FRONT COMBINATION LAMP RH (PARKING)
(Except for Europe, Australia and China)E27 EL-TAIL/L
FRONT COMBINATION LAMP RH (PARKING)
(For Europe, Australia and China)E28 EL-TAIL/L
FRONT COMBINATION LAMP RH (TURN SIG-
NAL) (Except for Europe, Australia and China)E27 EL-TURN
FRONT COMBINATION LAMP RH (TURN SIG-
NAL) (For Europe, Australia and China)E28 EL-TURN
FUEL FILTER (FUEL HEATER) E56 EC-F/HEAT
FUEL FILTER SWITCH (RHD models with die-
sel engine)E5 EL-WARN EL-BUZZER
FUEL RETURN CONTROL SOLENOID VALVE
(RHD models with NA engine)E40 EC-F/RTN
GROUND DISTRIBUTION
EL-16

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

CAUTION:
lAfter removing timing chain, do not turn crankshaft and
camshaft separately, or valves will strike piston heads.
lWhen installing rocker arms, camshafts, chain
tensioner, oil seals, or other sliding parts, lubricate con-
tacting surfaces with new engine oil.
lApply new engine oil to bolt threads and seat surfaces
when installing cylinder head, camshaft sprockets,
crankshaft pulley, and camshaft brackets.
Removal
1. Disconnect battery terminal.
2. Remove air cleaner and air intake duct.
3. Drain coolant by removing cylinder block drain plug and
radiator drain cock.
4. Remove heater hose and radiator hoses.
5. Remove radiator with shroud and cooling fan.
6. Remove the following belts.
lPower steering drive belt
lCompressor drive belt
lAlternator drive belt
7. Remove accel control wire.
8. Disconnect exhaust manifold from exhaust front tube.
SEM571FA
TIMING CHAINKA
EM-13