1998 NISSAN PICK-UP gas type

ELECTRICAL SYSTEM
SECTION
EL
When you read wiring diagrams:
lRead GI section, ``HOW TO READ WIRING DIAGRAMS''.
When you perform trouble diagnoses, read GI section, ``HOW TO FOLLOW FLOW CHART IN
TROUBLE DIAGNOSES'' and ``HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRI-
CAL INCIDENT''.
CONTENTS
PRECAUTIONS......................................................... 1
Supplemental Restraint System (SRS) ``AIR
BAG'' (4WD models).............................................. 1
Supplemental Restraint System (SRS) ``AIR
BAG'' (2WD models).............................................. 1
HARNESS CONNECTOR.......................................... 2
Description ............................................................. 2
STANDARDIZED RELAY.......................................... 3
Description ............................................................. 3
POWER SUPPLY ROUTING..................................... 5
Schematic .............................................................. 5
Wiring Diagram - POWER -................................... 6
Fuse ..................................................................... 13
Fusible Link .......................................................... 13
Circuit Breaker Inspection.................................... 13
GROUND DISTRIBUTION....................................... 14
BATTERY................................................................. 18
How to Handle Battery......................................... 18
Battery Test and Charging Chart......................... 21
Service Data and Specifications (SDS) ............... 25
STARTING SYSTEM............................................... 26
Wiring Diagram - START - .................................. 26
Trouble Diagnoses ............................................... 27
Construction ......................................................... 28
Removal and Installation ..................................... 30
Inspection ............................................................. 30
Assembly.............................................................. 32
Service Data and Specifications (SDS) ............... 33
CHARGING SYSTEM.............................................. 34
Wiring Diagram - CHARGE -/Gasoline Engine ... 34
Wiring Diagram - CHARGE -/Diesel Engine ....... 35Trouble Diagnoses ............................................... 36
Construction ......................................................... 38
Removal and Installation ..................................... 39
Disassembly ......................................................... 39
Inspection ............................................................. 39
Assembly.............................................................. 40
Service Data and Specifications (SDS) ............... 41
COMBINATION SWITCH........................................ 42
Check ................................................................... 42
Replacement ........................................................ 43
HEADLAMP - Conventional Type -....................... 44
Wiring Diagram - H/LAMP -/LHD Models ............ 44
Wiring Diagram - H/LAMP -/RHD Models ........... 46
Trouble Diagnoses ............................................... 48
Bulb Replacement................................................ 49
Aiming Adjustment ............................................... 49
Low Beam ............................................................ 50
HEADLAMP - Daytime Light System -................. 51
System Description .............................................. 51
Schematic ............................................................ 53
Wiring Diagram - DTRL - ..................................... 54
Trouble Diagnoses ............................................... 57
Bulb Replacement................................................ 57
Aiming Adjustment ............................................... 57
HEADLAMP - Dim-dip Lamp System -................. 58
System Description .............................................. 58
Schematic ............................................................ 58
Wiring Diagram - DIMDIP -.................................. 59
Trouble Diagnoses ............................................... 62
Bulb Replacement................................................ 62
Aiming Adjustment ............................................... 62
EL

OIL SEAL INSTALLING DIRECTION
lWhen installing a new front or rear seal, make sure its mount-
ing direction is correct.
CRANKSHAFT FRONT OIL SEAL
1. Remove radiator shroud.
2. Remove cooling fan.
3. Remove drive belts.
4. Remove crankshaft pulley.
5. Remove crankshaft oil seal.
lBe careful not to damage sealing surfaces of crankshaft.
6. Coat new oil seal with engine oil and install it in place.
lPress the oil seal until it contacts with the front cover.
CRANKSHAFT REAR OIL SEAL
1. Dismount transmission.
2. Remove clutch cover assembly.
3. Remove flywheel and rear plate.
4. Remove oil pan and oil pan gasket.
5. Remove oil seal retainer assembly and retainer gasket.
lReplace oil seal and retainer assembly as a single unit
(mono-block type combined with oil seal).
6. Coat oil seal with engine oil and install new oil seal retainer
assembly in place.
VALVE STEM OIL SEAL
1. Remove following parts.
lThrottle chamber and air intake tube
SEM715A
SEM644B
DEM042
MEM182A
DEM108
.
OIL SEAL REPLACEMENTTD
EM-67

DIESEL ENGINE*:
For Europe: diesel fuel of above 50 cetane
* If two types of diesel fuel are available, use summer or win-
ter fuel properly according to the following temperature con-
ditions.
lAbove þ7ÉC (20ÉF) ... Summer type diesel fuel.
lBelow þ7ÉC (20ÉF) ... Winter type diesel fuel.
CAUTION:
lDo not use home heating oil, gasoline, or other alternate
fuels in your diesel engine. The use of those can cause
engine damage.
lDo not use summer fuel at temperature below þ7ÉC
(20ÉF). The cold temperature will cause wax to form in
the fuel. As a result, it may prevent the engine from run-
ning smoothly.
lDo not add gasoline or other alternate fuels to diesel
fuel.
Precautions for Air Conditioning
Use an approved refrigerant recovery unit any time the air con-
ditioning system must be discharged. Refer to HA section
(``HFC-134a (R-134a) Service Procedure'', ``SERVICE PRO-
CEDURES'') for specific instructions.
PRECAUTIONS
Precautions for Fuel (Cont'd)
GI-6

Precautions for Working with HFC-134a
(R-134a)
WARNING:
lCFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. These refrig-
erants must never be mixed, even in the smallest amounts. If the refrigerants are mixed, com-
pressor failure is likely to occur.
lUse only specified lubricant for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) com-
ponents. If lubricant other than that specified is used, compressor failure is likely to occur.
lThe specified HFC-134a (R-134a) lubricant rapidly absorbs moisture from the atmosphere. The
following handling precautions must be observed:
a: When removing refrigerant components from a vehicle, immediately cap (seal) the compo-
nent to minimize the entry of moisture from the atmosphere.
b: When installing refrigerant components to a vehicle, do not remove the caps (unseal) until
just before connecting the components. Connect all refrigerant loop components as quickly
as possible to minimize the entry of moisture into system.
c: Only use the specified lubricant from a sealed container. Immediately reseal containers of
lubricant. Without proper sealing, lubricant will become moisture saturated and should not
be used.
d: Avoid breathing A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes,
nose and throat. Use only approved recovery/recycling equipment to discharge HFC-134a
(R-134a) refrigerant. If accidental system discharge occurs, ventilate work area before
resuming service. Additional health and safety information may be obtained from refriger-
ant and lubricant manufacturers.
e: Do not allow lubricant (Nissan A/C System Oil Type S) to come in contact with styrofoam
parts. Damage may result.
General Refrigerant Precautions
WARNING:
lDo not release refrigerant into the air. Use approved recovery/recycling equipment to capture the
refrigerant every time an air conditioning system is discharged.
lAlways wear eye and hand protection (goggles and gloves) when working with any refrigerant or
air conditioning system.
lDo not store or heat refrigerant containers above 52ÉC (125ÉF).
lDo not heat a refrigerant container with an open flame; if container warming is required, place
the bottom of the container in a warm pail of water.
lDo not intentionally drop, puncture, or incinerate refrigerant containers.
lKeep refrigerant away from open flames: poisonous gas will be produced if refrigerant burns.
lRefrigerant will displace oxygen, therefore be certain to work in well ventilated areas to prevent
suffocation.
lDo not introduce compressed air to any refrigerant container or refrigerant component.
Precautions for Refrigerant Connection
A new type refrigerant connection has been introduced to all refrigerant lines except the following location.
lExpansion valve to cooling unit
lCondenser to liquid tank
FEATURES OF NEW TYPE REFRIGERANT CONNECTION
lThe O-ring has been relocated. It has also been provided with a groove for proper installation. This
eliminates the chance of the O-ring being caught in, or damaged by, the mating part. The sealing direc-
tion of the O-ring is now set vertically in relation to the contacting surface of the mating part to improve
sealing characteristics.
lThe reaction force of the O-ring will not occur in the direction that causes the joint to pull out, thereby
facilitating piping connections.
PRECAUTIONS AND PREPARATION
HA-2

WARNING:
Make sure all refrigerant is discharged into the recycling equipment and the pressure in the system
is less than atmospheric pressure. Then gradually loosen the discharge side hose fitting and remove
it.
CAUTION:
When replacing or cleaning refrigerant cycle components, observe the following.
lWhen the compressor is removed, store it in the same position as it is when mounted on the car.
Failure to do so will cause lubricant to enter the low pressure chamber.
lWhen connecting tubes, always use a torque wrench and a back-up wrench.
lAfter disconnecting tubes, immediately plug all openings to prevent entry of dirt and moisture.
lWhen installing an air conditioner in the vehicle, connect the pipes as the final stage of the
operation. Do not remove the seal caps of pipes and other components until just before required
for connection.
lAllow components stored in cool areas to warm to working area temperature before removing
seal caps. This prevents condensation from forming inside A/C components.
lThoroughly remove moisture from the refrigeration system before charging the refrigerant.
lAlways replace used O-rings.
lWhen connecting tube, apply lubricant to portions shown in illustration. Be careful not to apply
lubricant to threaded portion.
Lubricant name: Nissan A/C System Oil Type R (Except for the Middle East)
Nissan A/C System Oil Type S (For the Middle East)
Part number: KLH00-PAGR0 (Except for the Middle East)
KLH00-PAGS0 (For the Middle East)
lO-ring must be closely attached to inflated portion of tube.
lAfter inserting tube into union until O-ring is no longer visible, tighten nut to specified torque.
lAfter connecting line, conduct leak test and make sure that there is no leakage from connections.
When the gas leaking point is found, disconnect that line and replace the O-ring. Then tighten
connections of seal seat to the specified torque.
RHA861F
PRECAUTIONS AND PREPARATION
Precautions for Refrigerant Connection
(Cont'd)
HA-5

Maintenance of Lubricant Quantity in
Compressor
The lubricant used to lubricate the compressor circulates through
the system with the refrigerant. Add lubricant to compressor
when replacing any component or after a large gas leakage
occurred. It is important to maintain the specified amount.
If lubricant quantity is not maintained properly, the following mal-
functions may result:
lLack of lubricant: May lead to a seized compressor
lExcessive lubricant: Inadequate cooling (thermal exchange
interference)
LUBRICANT
Name: Nissan A/C System Oil Type R
Part number: KLH00-PAGR0
CHECKING AND ADJUSTING
Adjust the lubricant quantity according to the flowchart shown
below.
START
Can lubricant return operation be per-
formed?
lA/C system works properly.lThere is no evidence of a large amount of
lubricant leakage.
No
cYes
Perform lubricant return operation, proceeding as follows:
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1. Start engine, and set the following conditions:
lTest condition
Engine speed: Idling to 1,200 rpm
A/C or AUTO switch: ON
Blower speed: Max. position
Temp. control: Optional [Set so that intake air temperature is
25 to 30ÉC (77 to 86ÉF).]
2. Next item is for V-5 or V-6 compressor. Connect the manifold
gauge, and check that the high pressure side pressure is 588 kPa
(5.9 bar, 6 kg/cm
2, 85 psi) or higher.
If less than the reference level, attach a cover to the front face of
the condenser to raise the pressure.
3. Perform lubricant return operation for about 10 minutes.
4. Stop engine.
CAUTION:
If excessive lubricant leakage is noted, do not perform the lubricant
return operation.
Should the compressor be replaced?
No Yes
b
VA(Go to next page.)
Is there any part to be replaced?
(Evaporator, condenser, liquid tank or in
case there is evidence of a large amount of
lubricant leakage.)
No
cYes
After replacing any of the following major components, add the correct
amount of lubricant to the system.
Amount of lubricant to be added
*1: If compressor is replaced, addition of lubricant is included in the flow
chart.
*2: If refrigerant leak is small, no addition of lubricant is needed.
Carry out the A/C performance test.b
Part replacedLubricant to be added to sys-
tem
Remarks
Amount of lubricant
m!(Imp fl oz)
Evaporator 75 (2.6) Ð
Condenser 75 (2.6) Ð
Liquid tank 5 (0.2)Add if compressor is not
replaced. *1
In case of refrigerant leak30 (1.1) Large leak
Ð Small leak*2
.
.
.
.
.
SERVICE PROCEDURES
HA-50

ENGINE LUBRICATION &
COOLING SYSTEMS
SECTION
LC
CONTENTS
PRECAUTIONS AND PREPARATION..................... 1
Liquid Gasket Application Procedure .................... 1
Special Service Tools ............................................ 2
KA
ENGINE LUBRICATION SYSTEM............................ 3
Lubrication Circuit .................................................. 3
Oil Pressure Check ................................................ 4
Oil Pump ................................................................ 4
ENGINE COOLING SYSTEM.................................... 6
Cooling Circuit........................................................ 6
System Check ........................................................ 6
Water Pump ........................................................... 7
Thermostat ............................................................. 8
Radiator.................................................................. 9
Cooling Fan (Crankshaft driven).......................... 10
TD
ENGINE LUBRICATION SYSTEM.......................... 12
Lubrication Circuit ................................................ 12
Oil Pressure Check (On-vehicle service) ............ 13
Oil Pump .............................................................. 14
Oil Filter Bracket .................................................. 16
Oil Cooler ............................................................. 17Oil Jet ................................................................... 18
ENGINE COOLING SYSTEM.................................. 19
Cooling Circuit...................................................... 19
Cooling System Inspection .................................. 20
Water Pump and Cooling Fan (Camshaft
driven) .................................................................. 21
Thermostat ........................................................... 23
Radiator................................................................ 24
Refilling Engine Coolant ...................................... 24
ENGINE ROOM FAN MOTOR ELECTRICAL
CIRCUIT................................................................... 25
Wiring Diagram .................................................... 25
Cooling Fan (Motor driven) .................................. 26
Electrical Components Inspection ....................... 26
ENGINE COOLING SYSTEM.................................. 28
Radiator (Aluminum type) .................................... 28
Overheating Cause Analysis ............................... 31
SERVICE DATA AND SPECIFICATIONS (SDS)... 32
Engine Lubrication System (KA).......................... 32
Engine Cooling System (KA) ............................... 32
Engine Lubrication System (TD).......................... 32
Engine Cooling System (TD) ............................... 32
LC

Engine Lubrication System (KA)
Oil pressure check
Engine speed
rpmApproximate discharge pressure
kPa (bar, kg/cm2, psi)
Idle speed More than 78 (0.78, 0.8, 11)
3,000 412 - 481 (4.12 - 4.81, 4.2 - 4.9, 60 - 70)
Oil pump inspection
Unit: mm (in)
Rotor tip clearance Less than 0.12 (0.0047)
Outer rotor to body radial
clearance0.15 - 0.21 (0.0059 - 0.0083)
Side clearance (with gasket) 0.04 - 0.08 (0.0016 - 0.0031)
Engine Cooling System (KA)
Thermostat
Valve opening temperature ÉC (ÉF) 76.5 (170)
Valve lift mm/ÉC (in/ÉF) More than 8/90 (0.31/194)
Radiator
Unit: kPa (bar, kg/cm2, psi)
Cap relief
pressureStandard78-98
(0.78 - 0.98, 0.8 - 1.0, 11 - 14)
Limit59-98
(0.59 - 0.98, 0.6 - 1.0,9-14)
Leakage test pressure 157 (1.57, 1.6, 23)
Engine Lubrication System (TD)
Oil pressure check
Engine speed
rpmApproximate discharge pressure
kPa (bar, kg/cm2, psi)
Idle speed More than 78 (0.78, 0.8, 11)
3,000 294 - 392 (2.94 - 3.92, 3.0 - 4.0, 43 - 57)
Oil pump inspection
Unit: mm (in)
Gear side clearance Less than 0.13 (0.0051)
Gear backlash Less than 0.43 (0.0169)
Oil pump bushing clearance Less than 0.15 (0.0059)
Oil pump bushing inside diameter13.012 - 13.106
(0.5123 - 0.5160)
Drive gear shaft outside diameter12.974 - 12.992
(0.5108 - 0.5115)
Engine Cooling System (TD)
Radiator
Unit: kPa (bar, kg/cm2, psi)
Cap relief pressure78-98
(0.78 - 0.98, 0.8 - 1.0, 11 - 14)
Leakage test pressure 157 (1.57, 1.6, 23)
Thermostat
Tropical type Standard type
Valve opening tem-
perature ÉC (ÉF)76.5 (170) 82 (180)
Valve lift
mm/ÉC (in/ÉF)More than 8/90
(0.31/194)More than 8/95
(0.31/203)
SERVICE DATA AND SPECIFICATIONS (SDS)
LC-32