1998 NISSAN PATROL service

Observe the following precautions to ensure safe and proper
servicing. These precautions are not described in each indi-
vidual section.
Precaution for Supplemental Restraint System
(SRS) ``AIR BAG'' and ``SEAT BELT
PRE-TENSIONER''
The Supplemental Restraint System such as ``AIR BAG'' and
``SEAT BELT PRE-TENSIONER'' used along with a seat belt, helps
to reduce the risk or severity of injury to the driver and front pas-
senger in a frontal collision. The SRS system composition which is
available to NISSAN MODEL Y61 is as follows (The composition
varies according to the destination.):
Driver air bag module (located in the center of the steering wheel),
front passenger air bag module (located on the instrument panel on
passenger side), seat belt pre-tensioner, a diagnosis sensor unit,
warning lamp, wiring harness and spiral cable.
Information necessary to service the system safely is included in
theRS sectionof this Service Manual.
WARNING:
+To avoid rendering the SRS inoperative, which could
increase the risk of personal injury or death in the event of
a collision which would result in air bag in¯ation, all main-
tenance must be performed by an authorized NISSAN
dealer.
+Improper maintenance, including incorrect removal and
installation of the SRS, can lead to personal injury caused
by unintentional activation of the system. For removal of
Spiral Cable and Air Bag Module, see the RS section.
+Do not use electrical test equipment on any circuit related
to the SRS unless instructed to in this Service Manual.
Spiral cable and wiring harnesses are covered with yellow
insulation either just before the harness connectors or for
the complete harness are related to the SRS.
SGI646
PRECAUTIONS
GI-1

+Clean all disassembled parts in the designated liquid or solvent
prior to inspection or assembly.
+Replace oil seals, gaskets, packings, O-rings, locking washers,
cotter pins, self-locking nuts, etc. with new ones.
+Replace inner and outer races of tapered roller bearings and
needle bearings as a set.
+Arrange the disassembled parts in accordance with their
assembled locations and sequence.
+Do not touch the terminals of electrical components which use
microcomputers (such as ECMs).
Static electricity may damage internal electronic components.
+After disconnecting vacuum or air hoses, attach a tag to indi-
cate the proper connection.
+Use only the ¯uids and lubricants speci®ed in this manual.
+Use approved bonding agent, sealants or their equivalents
when required.
+Use tools and recommended special tools where speci®ed for
safe and efficient service repairs.
+When repairing the fuel, oil, water, vacuum or exhaust systems,
check all affected lines for leaks.
+Dispose 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 disconnected only
when working according to the WORK FLOW of TROUBLE
DIAGNOSES in EC and AT sections.
Precautions for Multiport Fuel Injection System
or ECCS Engine
+Before connecting or disconnecting any harness connector for
the multiport fuel injection system or ECM (Engine Control
Module):
Turn ignition switch to ``OFF'' position.
Disconnect negative battery terminal.
Otherwise, there may be damage to ECM.
+
Before disconnecting pressurized fuel line from fuel pump to
injectors, be sure to release fuel pressure.
+Be careful not to jar components such as ECM and mass air
¯ow sensor.SGI787
PRECAUTIONS
General Precautions (Cont'd)
GI-3

Dispose of used oil and used oil ®lters through authorized waste
disposal contractors to licensed waste disposal sites, or to the
waste oil reclamation trade. If in doubt, contact the local authority
for advice on disposal facilities.
It is illegal to pour used oil on to the ground, down sewers or drains,
or into water courses.
The regulations concerning the pollution of the environment
will vary from country to country.
Precautions for Fuel
GASOLINE ENGINE:
Three way catalyst equipped models ... unleaded gasoline of at
least 91 octane (RON)
CAUTION:
Do not use leaded gasoline. Using leaded gasoline will dam-
age the three way catalyst.
Except for the above models ... unleaded or leaded gasoline of
above 88 octane (RON)
Use unleaded fuel if instructed on the fuel ®ller lid.
DIESEL ENGINE*:
Diesel fuel of above 45 cetane for TD42 engine and above 50 cet-
ane for RD28ET engine
* If two types of diesel fuel are available, use summer or winter
fuel properly according to the following temperature conditions.
+Above þ7ÉC (20ÉF) ... Summer type diesel fuel.
+Below þ7ÉC (20ÉF) ... Winter type diesel fuel.
CAUTION:
+Do not use home heating oil, gasoline, or other alternate
fuels in your diesel engine. The use of those can cause
engine damage.
+Do 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 running smoothly.
+Do not add gasoline or other alternate fuels to diesel fuel.
Precautions for Air Conditioning
Use an approved refrigerant recovery unit any time the air condi-
tioning system must be discharged. Refer to HA section (``HFC-
134a (R-134a) Service Procedure'', ``SERVICE PROCEDURES'')
for speci®c instructions.
PRECAUTIONS
Precautions for Engine Oils (Cont'd)
GI-5

+ALPHABETICAL INDEXis provided at the end of this manual so that you can rapidly ®nd the item and
page you are searching for.
+A QUICK REFERENCE INDEX,a black tab (e.g.
) is provided on the ®rst page. You can quickly ®nd
the ®rst page of each section by mating it to the section's black tab.
+THE CONTENTSare listed on the ®rst page of each section.
+THE TITLEis indicated on the upper portion of each page and shows the part or system.
+THE PAGE NUMBERof each section consists of two letters which designate the particular section and a
number (e.g. ``BR-5'').
+THE LARGE ILLUSTRATIONSare exploded views (See below) and contain tightening torques, lubrica-
tion points, section number of thePARTS CATALOG(e.g. SEC. 440) and other information necessary to
perform repairs.
The illustrations should be used in reference to service matters only. When ordering parts, refer to the
appropriatePARTS CATALOG.
+THE SMALL ILLUSTRATIONSshow the important steps such as inspection, use of special tools, knacks
of work and hidden or tricky steps which are not shown in the previous large illustrations.
Assembly, inspection and adjustment procedures for the complicated units such as the automatic transaxle
or transmission, etc. are presented in a step-by-step format where necessary.
SBR364AC
HOW TO USE THIS MANUAL
GI-6

+The followingSYMBOLS AND ABBREVIATIONSare used:
,: Tightening torque
: Should be lubricated with grease.
Unless otherwise indicated, use rec-
ommended multi-purpose grease.
: Should be lubricated with oil.
: Sealing point
: Checking point
: Always replace after every disas-
sembly.
jP: Apply petroleum jelly.
: Apply ATF.
.: Select with proper thickness.
>: Adjustment is required.
SDS : Service Data and Speci®cations
LH, RH : Left-Hand, Right-Hand
FR, RR : Front, Rear
M/T : Manual Transaxle/Transmission
,
4WD : 4-Wheel Drive
2WD : 2-Wheel Drive
A/C : Air Conditioner
P/S : Power Steering
SST : Special Service Tools
SAE : Society of Automotive Engineers,
Inc.
ATF : Automatic Transmission Fluid
D
1: Drive range 1st gear
D
2: Drive range 2nd gear
D
3: Drive range 3rd gear
D
4: Drive range 4th gear
OD : Overdrive
2
2: 2nd range 2nd gear
2
1: 2nd range 1st gear
1
2: 1st range 2nd gear
1
1: 1st range 1st gear
+TheUNITSgiven in this manual are primarily expressed as the SI UNIT (International System of Unit),
and alternatively expressed in the metric system and in the yard/pound system.
``Example''
Tightening torque:
59-78Nzm (6.0 - 8.0 kg-m, 43 - 58 ft-lb)
+TROUBLE DIAGNOSESare included in sections dealing with complicated components.
+SERVICE DATA AND SPECIFICATIONSare contained at the end of each section for quick reference of
data.
+The captionsWARNINGandCAUTIONwarn you of steps that must be followed to prevent personal injury
and/or damage to some part of the vehicle.
WARNINGindicates the possibility of personal injury if instructions are not followed.
CAUTIONindicates the possibility of component damage if instructions are not followed.
BOLD TYPED STATEMENTSexceptWARNINGandCAUTIONgive you helpful information.
HOW TO USE THIS MANUAL
GI-7

Work Flow
STEP DESCRIPTION
STEP 1 Get detailed information about the conditions and the environment when the incident occurred.
The following are key pieces of information required to make a good analysis:
WHATVehicle Model, Engine, Transmission and the System (i.e. Radio).
WHENDate, Time of Day, Weather Conditions, Frequency.
WHERERoad Conditions, Altitude and Traffic Situation.
HOWSystem Symptoms, Operating Conditions (Other Components Interaction).
Service History and if any After Market Accessories have been installed.
STEP 2 Operate the system, road test if necessary.
Verify the parameter of the incident.
If the problem can not be duplicated, refer to ``Incident Simulation Tests'' next page.
STEP 3 Get the proper diagnosis materials together including:
POWER SUPPLY ROUTING
System Operation Descriptions
Applicable Service Manual Sections
Check for any Service Bulletin.
Identify where to begin diagnosis based upon your knowledge of the system operation and the customer comments.
STEP 4 Inspect the system for mechanical binding, loose connectors or wiring damage.
Determine which circuits and components are involved and diagnose using the Power Supply Routing and Harness
Layouts.
STEP 5 Repair or replace the incident circuit or component.
STEP 6 Operate the system in all modes. Verify the system works properly under all conditions. Make sure you have not inad-
vertently created a new incident during your diagnosis or repair steps.
SGI838
HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT
GI-20

Incident Simulation Tests
INTRODUCTION
Sometimes the symptom is not present when the vehicle is brought in for service. If possible, re-create the
conditions present at the time of the incident. Doing so may help avoid a No Trouble Found Diagnosis. The
following section illustrates ways to simulate the conditions/environment under which the owner experiences
an electrical incident.
The section is broken into the six following topics:
+Vehicle vibration
+Heat sensitive
+Freezing
+Water intrusion
+Electrical load
+Cold or hot start up
Get a thorough description of the incident from the customer. It is important for simulating the conditions of
the problem.
VEHICLE VIBRATION
The problem may occur or become worse while driving on a rough road or when engine is vibrating (idle with
A/C on). In such a case, you will want to check for a vibration related condition. Refer to the illustration below.
Connectors & harness
Determine which connectors and wiring harness would affect the electrical system you are inspecting.Gen-
tlyshake each connector and harness while monitoring the system for the incident you are trying to dupli-
cate. This test may indicate a loose or poor electrical connection.
Hint
Connectors can be exposed to moisture. It is possible to get a thin ®lm of corrosion on the connector termi-
nals. A visual inspection may not reveal this without disconnecting the connector. If the problem occurs
intermittently, perhaps the problem is caused by corrosion. It is a good idea to disconnect, inspect and clean
the terminals on related connectors in the system.
Sensors & relays
Gentlyapply a slight vibration to sensors and relays in the system you are inspecting.
This test may indicate a loose or poorly mounted sensor or relay.
SGI839
HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT
GI-21

***: Not applicable
NEW TERMNEW ACRONYM /
ABBREVIATIONOLD TERM
Manifold surface temperature MST ***
Manifold surface temperature sensor MSTS ***
Manifold vacuum zone MVZ ***
Manifold vacuum zone sensor MVZS ***
Mass air ¯ow sensor MAFS Air ¯ow meter
Mixture control solenoid valve MC solenoid valve Air-fuel ratio control solenoid valve
Multiport fuel injection System MFI system Fuel injection control
Neutral position switch *** Neutral switch
Nonvolatile random access memory NVRAM ***
On board diagnostic system OBD system Self-diagnosis
Open loop OL Open loop
Oxidation catalyst OC Catalyst
Oxidation catalytic converter system OC system ***
Oxygen sensor O2S Exhaust gas sensor
Park position switch *** Park switch
Park/neutral position switch PNP switch Park/neutral switch
Periodic trap oxidizer system PTOX system ***
Positive crankcase ventilation PCV Positive crankcase ventilation
Positive crankcase ventilation valve PCV valve PCV valve
Powertrain control module PCM ***
Programmable read only memory PROM ***
Pulsed secondary air injection control solenoid valve PAIRC solenoid valve AIV control solenoid valve
Pulsed secondary air injection system PAIR system Air induction valve (AIV) control
Pulsed secondary air injection valve PAIR valve Air induction valve
Random access memory RAM ***
Read only memory ROM ***
Scan tool ST ***
Secondary air injection pump AIR pump ***
Secondary air injection system AIR system ***
Sequential multiport fuel injection system SFI system Sequential fuel injection
Service reminder indicator SRI ***
Simultaneous multiport fuel injection system *** Simultaneous fuel injection
Smoke puff limiter system SPL system ***
Supercharger SC ***
Supercharger bypass SCB ***
System readiness test SRT ***
Thermal vacuum valve TVV Thermal vacuum valve
Three way catalyst TWC Catalyst
Three way catalytic converter system TWC system ***
Three way + oxidation catalyst TWC + OC Catalyst
SAE J1930 TERMINOLOGY LIST
SAE J1930 Terminology List (Cont'd)
GI-45