2001 NISSAN PICK-UP coolant

neck to prevent the radiator filler neck from deforming.
+If any abnormalities are found, repair or replace the malfunc-
tioning parts.
Water Pump
REMOVAL AND INSTALLATION
CAUTION:
+When removing water pump assembly, be careful not to
get coolant on drive belt.
+Water pump cannot be disassembled and should be
replaced as a unit.
+After installing water pump, connect hose and clamp
securely, then check for leaks using radiator cap tester.
1. Gasket
2. Water pump3. Water pump pulley 4. Coupling
REMOVAL
1. Drain engine coolant. Refer to ªChanging Engine Coolantº in
MA section.
2. Remove radiator shroud.
3. Remove cooling fan and coupling.
4. Remove drive belts. Refer to ªDrive Beltsº in EM section.
5. Remove the water pump pulley.
6. Remove the water pump.
INSPECTION
+Check for rust and contamination adhering to the water pump
and vane.
+Turn the pump shaft by hand, and check that the pump turns
smoothly without looseness.
CAUTION:
Do not disassemble cooling fan coupling.
INSTALLATION
+Install the parts in the reverse order of removal.
SLC479B
ENGINE COOLING SYSTEMYD25DDTi
System Check (Cont'd)
LC-3012

Thermostat and Water Piping
REMOVAL AND INSTALLATION
+Be careful not to spill coolant over engine compartment.
Use a rag to absorb coolant.
1. Drain engine coolant. Refer to ªChanging Engine Coolantº in
MA section.
2. Remove water inlet.
3. Remove thermostat.
4. Install thermostat with jiggle valve facing upward.
+Carefully install the rubber ring to the flange of the
thermostat, making sure it does not slip out of place.
5. After installation and refilling coolant, run engine for a few
minutes, and check for leaks.
SLC480B
JLC300B
ENGINE COOLING SYSTEMYD25DDTi
LC-3014

INSPECTION
1. Check valve seating condition at ordinary room tempera-
tures. It should seat tightly.
2. Check valve opening temperature and maximum valve lift.
Standard
Valve opening temperature Above 80 - 84ÉC (176 - 183ÉF)
Valve lift More than 10 mm/95ÉC
(0.39 in/203ÉF)
3. Then check if valve closes at 5ÉC (9ÉF) below valve opening
temperature.
Radiator
REMOVAL AND INSTALLATION
1. Remove under guard.
2. Drain engine coolant. Refer to MA section, ªChanging Engine
Coolantº.
3. Remove radiator shroud (lower).
4. Remove radiator shroud (upper).
5. Disconnect radiator hose (upper and lower).
6. Disconnect reservoir tank hose.
7. Remove radiator.
8. After repairing or replacing radiator, install all removed parts
in reverse order of removal.
SLC252B
SLC481B
ENGINE COOLING SYSTEMYD25DDTi
Thermostat and Water Piping (Cont'd)
LC-3015

A
A/C relay ..................................... HA-3019, 3029
A/C trouble diagnoses (auto A/C) ......... HA-3020
A/C trouble diagnoses
(manual A/C) ........................... HA-3004, 3020
A/C, A - Wiring diagram ........................ HA-3021
A/C, M - Wiring diagram ............. HA-3006, 3009
A/T IND - Wiring diagram ...................... EL-3100
AAC/V - Wiring diagram ....................... EC-3298
ABS - Wiring diagram ................. BR-3003, 3010
AT indicator lamp .................................. EL-3100
Accelerator control system .................... FE-3002
Accelerator position sensor ........ EC-3515, 3516
Air bag disposal .................................... RS-3011
Air bag ................................................... RS-3003
Air cleaner filter replacement ..... MA-3010, 3019
Air conditioner cut control . EC-3028, 3413, 3414
Air flow meter - See Mass air flow
sensor ................................................ EC-3151
Alternator ............................................... EL-3022
Angular tightening application .............. EM-3003
Antenna ................................................. EL-3115
Anti-lock brake system - Wiring
diagram ......................... BR-3002, 3003, 3009
Auxiliary air control (AAC) valve ........... EC-3295
B
BACK/L - Wiring diagram ...................... EL-3044
BOOST - Wiring diagram ....................................
Back-up lamp ......................................... EL-3044
Basic inspection ................ EC-3086, 3444, 3445
Battery ................................................... EL-3013
Bumper, front ....................................... BT-3002
C
CHARGE - Wiring diagram ................... EL-3018
CIGAR - Wiring diagram ....................... EL-3110
CKPS - Wiring diagram .............. EC-3266, 3351
CLOCK - Wiring diagram ...................... EL-3111
CMPS - Wiring diagram ........................ EC-3273
CONSULT for engine ....... EC-3070, 3434, 3435
Camshaft inspection ............................. EM-3050
Camshaft position sensor (CMPS) ....... EC-3270
Canister - See EVAP canister .............. EC-3029
Center case (Transfer) .......................... TF-3003
Charging system .................................... EL-3018
Cigarette lighter ..................................... EL-3110
Clock ...................................................... EL-3111
Closed throttle position switch ............. EC-3301
Collision diagnosis ................................ RS-3037
Combination lamp, front, removal and
installation .......................................... BT-3002
Combination meter ................................ EL-3056
Compression pressure ......................... EM-3013
Connecting rod bearing clearance ....... EM-3077Connecting rod bushing clearance ....... EM-3080
Connecting rod ..................................... EM-3072
Coolant replacement ............................ MA-3014
Cooling circuit (engine) ......................... LC-3010
Cooling fan control system ......... LC-3002, 3017
Cooling fan control ........... EC-3344, 3489, 3490
Cooling fan ............................................ LC-3016
Counter gear (Transfer) ......................... TF-3004
Crank angle sensor built into
distributor - See Camshaft position
sensor ................................................ EC-3270
Crankcase emission control system -
See Positive crankcase
ventilation ...................... EC-3032, 3414, 3415
Crankcase ventilation system - See
Positive crankcase
ventilation ...................... EC-3032, 3414, 3415
Crankshaft position sensor (OBD) cog
chipping ............................................. EC-3349
Crankshaft position sensor (OBD) ........ EC-3264
Crankshaft position sensor
(TDC) ...................................... EC-3534, 3535
Crankshaft ............................................ EM-3075
Cylinder block ....................................... EM-3066
Cylinder head ....................................... EM-3046
D
DEF - Wiring diagram ............................ EL-3112
DIMDIP - Wiring diagram ...................... EL-3033
DTC P0121 TP Sensor ........................ EC-3170
DTC work support ................................. EC-3078
DTRL - Wiring diagram ......................... EL-3029
Data link connector for
Consult .......................... EC-3033, 3434, 3435
Daytime light system ............................. EL-3029
Detonation sensor - See Knock
sensor ................................................ EC-3260
Diagnosis sensor unit ........................... RS-3005
Diagnostic trouble code (DTC) for
OBD system .................. EC-3009, 3428, 3429
Diagnostic trouble code (DTC) inspec-
tion priority chart ............................... EC-3100
Dim-dip lamp system ............................. EL-3033
Distributor ignition (DI) system ............. EC-3026
Distributor .............................................. EC-3026
Drive belt inspection ............................. MA-3011
Drive chain (Transfer) ............................ TF-3004
E
ECCS-D control
module ......... EC-3595, 3594, 3598, 3599, 3463,
3464, 3501, 3502, 3581, 3582,
3583, 3584, 3585, 3586
ECM input/output signal ... EC-3110, 3463, 3464
ECTS - Wiring diagram ......................... EC-3167
EGR - Wiring diagram ................ EC-3607, 3608
ALPHABETICAL INDEX
IDX-3002

EGR volume control valve .......... EC-3605, 3606
EVAP canister purge volume control
solenoid valve ................................... EC-3283
EVAP canister ....................................... EC-3029
Electrical ignition system ...................... EC-3026
Electronic fuel injection
pump ........ EC-3419, 3420, 3508, 3509, 3542,
3543, 3549, 3550, 3556, 3557,
3563, 3564, 3570, 3571, 3573,
3574, 3614, 3615
Engine control circuit
diagram ......................... EC-3020, 3408, 3409
Engine control component parts
location .............................................. EC-3018
Engine control module (ECM) .............. EC-3308
Engine control system diagram and
chart .............................. EC-3021, 3409, 3410
Engine coolant temperature sensor
(ECTS) .......................... EC-3165, 3480, 3481
Engine fail-safe system ......................... EC-3101
Engine oil filter replacement ................. MA-3013
Engine oil replacement ......................... MA-3012
Engine outer component parts ............. EM-3008
Engine removal ..................................... EM-3063
Engine serial number ............................. GI-3006
Evaporative emission (EVAP)
system ............................................... EC-3029
Exhaust system ..................................... FE-3005
Exterior .................................................. BT-3006
F
F/PUMP - Wiring diagram ..................... EC-3380
FICD - Wiring diagram .......................... EC-3390
FUEL - Wiring diagram ............... EC-3239, 3246
Fast idle cam (FIC) ............................... EC-3035
Fluids .................................................... MA-3008
Flywheel runout .................................... EM-3080
Fog lamp, rear ....................................... EL-3045
Freeze frame data ................................ EC-3050
Front bumper ......................................... BT-3002
Front case (Transfer) ............................. TF-3003
Front combination lamp removal and
installation .......................................... BT-3002
Front drive shaft (Transfer) ................... TF-3004
Front passenger air bag ............. RS-3003, 3009
Fuel cut control (at no load & high
engine speed) ............... EC-3028, 3413, 3414
Fuel filter replacement .......................... MA-3018
Fuel filter ............................................... EC-3033
Fuel injection system ................. EC-3237, 3244,
3411, 3412
Fuel injector .......................................... EC-3369
Fuel line inspection ............................... MA-3019
Fuel pressure check ............................. EC-3033
Fuel pressure regulator ......................... EC-3034
Fuel pressure release ........................... EC-3033
Fuel pump relay .................................... EC-3378
Fuel pump ............................................. EC-3378Fuel system ........................................... FE-3003
Fuel tank vacuum relief valve ............... EC-3030
Fuse block ............................................. EL-3199
G
Gauges .................................................. EL-3056
Generic scan tool (GST) ....................... EC-3080
Glow plug .................................... EC-3621, 3622
Glow relay ................................... EC-3621, 3622
Grease .................................................. MA-3008
H
H/AIM - Wiring diagram ......................... EL-3037
H/LAMP - Wiring diagram ..................... EL-3023
HEAT UP - Wiring diagram ........ EC-3639, 3640
HEATER - Wiring diagram .................... HA-3004
HLC - Wiring diagram ............................ EL-3108
HORN - Wiring diagram ........................ EL-3109
HSEAT - Wiring diagram ....................... EL-3118
Harness layout ....................................... EL-3166
Hazard warning lamp ............................ EL-3047
Headlamp aiming control ....................... EL-3037
Headlamp removal and installation ....... BT-3002
Headlamp washer .................................. EL-3108
Headlamp .............................................. EL-3023
Heat up switch ............................ EC-3638, 3639
Heated oxygen sensor (HO2S)
(front) ........ EC-3202, 3213, 3196, 3310, 3317
Heated oxygen sensor (HO2S) heater
(front) ................................................. EC-3133
Heated oxygen sensor (HO2S) heater
(rear) .................................................. EC-3138
Heated oxygen sensor
(rear) ................... EC-3220, 3227, 3324, 3334
Heated seat ........................................... EL-3118
Hood ...................................................... BT-3002
Horn ....................................................... EL-3109
How to erase DTC for OBD
system ........................... EC-3060, 3428, 3429
I
IACV-AAC valve .................................... EC-3295
IACV-FICD solenoid valve .................... EC-3389
IATS - Wiring diagram ...... EC-3162, 3505, 3506
ILL - Wiring diagram .............................. EL-3050
INJECT - Wiring diagram ...................... EC-3370
INT/L - Wiring diagram .......................... EL-3055
Idle air control (IAC) system ................. EC-3295
Idle air control valve (IACV) .................. EC-3295
Idle mixture ratio ................................... EC-3035
Idle speed ......................... EC-3035, 3444, 3445
Ignition control system .......................... EC-3361
Ignition timing ........................................ EC-3035
Illumination ............................................. EL-3050
ALPHABETICAL INDEX
IDX-3003

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.
+Grasp 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 ª0º when performing aiming
adjustment on vehicles equipped with headlamp aiming
control.
GEL452A
SEL596Y
SEL597Y
HEADLAMP Ð Conventional Type Ð
EL-3027

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, A HA Auto Air Conditioner
A/C, M HA Manual Air Conditioner
ACC/SW EC Accelerator Switch
A/CCOT EC Air Conditioner Control
AIRREG EC IACV-Air Regulator
APS EC Accelerator Position Sensor
AT/IND EL A/T Indicator
AUDIO EL Audio
BACK/L EL Back-up Lamp
BA/FTS ATBATT/A/T Fluid Temperature Sensor
and TCM Power Supply
BOOST EC Turbocharger Boost Sensor
BRK/SW EC Brake Switch Signal
CHARGE EL Charging System
CHIME EL Warning Chime
CHOKE EC Automatic Choke
CIGAR EL Cigarette Lighter
CKPS EC Crankshaft Position Sensor
CLOCK EL Clock
CMPS EC Camshaft Position Sensor
COOL/F LC, EC Cooling Fan Control
DEF ELRear Window Defogger and Mirror
Defogger
DIMDIP ELHeadlamp Ð With Dim-dip Lamp
System
D/LOCK EL Power Door Lock
DTRL ELHeadlamp Ð With Daytime Light
System
ECMRLY EC ECM Relay
ECTS ECEngine Coolant Temperature
Sensor
EGRC/V EC EGRC Ð Solenoid Valve
EGVC/V EC EGR Volume Control Valve
ENGSS AT Engine Speed Signal
FCUT EC Fuel Cut Solenoid Valve
FICD EC IACV-FICD Solenoid Valve
FIPOT EC ISC-FI Pot
FPCM EC Fuel Pump Control Module
F/PUMP EC Fuel PumpCode Section Wiring Diagram Name
GLOW EC Quick-glow System
H/AIM EL Headlamp Aiming Control
HEATER HA Heater
HEATUP EC Heat up Switch
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
IGN EC Ignition System
IGN/SG EC Ignition Signal
ILL EL Illumination
INJECT EC Injector
INJPMP ECElectronic Control Fuel Injection
Pump
INT/L EL Spot Lamp
INT/V ECIntake Air Control Valve Control
Solenoid Valve
KS EC Knock Sensor
LOAD EC Electric Load Signal
LPSV AT Line Pressure Solenoid Valve
MAFS EC Mass Air Flow Sensor
MAIN EC, ATMain Power Supply and Ground Cir-
cuit
METER ELSpeedometer, Tachometer, Temp.
and Fuel Gauges
MIL/DL EC MIL and Data Link Connectors
MIRROR EL Power Door Mirror
MULTI EL Multi-remote Control System
NATS EL Nissan Anti-theft System
NONDTC AT Non-detectable Items
O2H1B1 EC Heated Oxygen Sensor 1 Heater
O2H2B1 EC Heated Oxygen Sensor 2 Heater
O2S1B1 EC Heated Oxygen Sensor 1
O2S2B1 EC Heated Oxygen Sensor 2
OVRCSV AT Overrun Clutch Solenoid Valve
P/ANT EL Power Antenna
PGC/V ECEVAP Canister Purge
Control Solenoid Valve
PLA EC Partial Load Advance Control
WIRING DIAGRAM CODES (CELL CODES)
EL-3194