2006 NISSAN PATROL Engine

DETECTABLE LINES AND NON-DETECTABLE LINES
In some wiring diagrams, two kinds of lines, representing wires,
with different weight are used.
+A line with regular weight (wider line) represents a ``detectable
line for DTC (Diagnostic Trouble Code)''. A ``detectable line for
DTC'' is a circuit in which ECM (Engine Control Module) can
detect its malfunctions with the on board diagnostic system.
+A line with less weight (thinner line) represents a ``non-detect-
able line for DTC''. A ``non-detectable line for DTC'' is a circuit
in which ECM cannot detect its malfunctions with the on board
diagnostic system.
SGI862-A
HOW TO READ WIRING DIAGRAMS
Description (Cont'd)
GI-14

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

Engine compartment
There are several reasons a vehicle or engine vibration could
cause an electrical complaint. Some of the things to check for are:
+Connectors not fully seated.
+Wiring harness not long enough and is being stressed due to
engine vibrations or rocking.
+Wires laying across brackets or moving components.
+Loose, dirty or corroded ground wires.
+Wires routed too close to hot components.
To inspect components under the hood, start by verifying the integ-
rity of ground connections. (Refer to GROUND INSPECTION
described later.) First check that the system is properly grounded.
Then check for loose connection bygently shakingthe wiring or
components as previously explained. Using the wiring diagrams
inspect the wiring for continuity.
Behind the instrument panel
An improperly routed or improperly clamped harness can become
pinched during accessory installation. Vehicle vibration can aggra-
vate a harness which is routed along a bracket or near a screw.
Under seating areas
An unclamped or loose harness can cause wiring to be pinched by
seat components (such as slide guides) during vehicle vibration. If
the wiring runs under seating areas, inspect wire routing for pos-
sible damage or pinching.
HEAT SENSITIVE
The owner's problem may occur during hot weather or after car has
sat for a short time. In such cases you will want to check for a heat
sensitive condition.
To determine if an electrical component is heat sensitive, heat the
component with a heat gun or equivalent.
Do not heat components above 60ÉC (140ÉF).If incident occurs
while heating the unit, either replace or properly insulate the com-
ponent.
SGI842
HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT
Incident Simulation Tests (Cont'd)
GI-22

KEY TO SYMBOLS SIGNIFYING MEASUREMENTS OR PROCEDURES
Symbol Symbol explanation Symbol Symbol explanation
Check after disconnecting the connector
to be measured.Procedure with CONSULT
Check after connecting the connector to
be measured.Procedure without CONSULT
Insert key into ignition switch.A/C switch is ``OFF''.
Remove key from ignition switch.A/C switch is ``ON''.
Turn ignition switch to ``OFF'' position.REC switch is ``ON''.
Turn ignition switch to ``ON'' position.REC switch is ``OFF''.
Turn ignition switch to ``START'' position.DEF switch is ``ON''.
Turn ignition switch from ``OFF'' to ``ACC''
position.Apply positive voltage from battery with
fuse directly to components.
Turn ignition switch from ``ACC'' to ``OFF''
position.Drive vehicle.
Turn ignition switch from ``OFF'' to ``ON''
position.Disconnect battery negative cable.
Turn ignition switch from ``ON'' to ``OFF''
position.Depress brake pedal.
Do not start engine, or check with engine
stopped.Release brake pedal.
Start engine, or check with engine run-
ning.Depress accelerator pedal.
Apply parking brake.Release accelerator pedal.
Release parking brake.
Pin terminal check for SMJ type ECM
and TCM connectors.
For details regarding the terminal
arrangement, refer to the foldout page.Check after engine is warmed up suffi-
ciently.
Voltage should be measured with a volt-
meter.
Circuit resistance should be measured
with an ohmmeter.
Current should be measured with an
ammeter.
HOW TO FOLLOW FLOW CHART IN TROUBLE DIAGNOSES
How to Follow This Flow Chart (Cont'd)
GI-32

Model Variation
Destina-
tionSteering
positionEngineModel Hardtop Station Wagon
Rear seat arrangement Forward facing Seatless2nd center split bench seat
3rd seat
Seatless Forward facing Side facing
Front differential H233B
Rear differential
H233B
Transmis-
sionTransfer Grade
EuropeRHD
RD28ETi FS5R30A TX12AS KWBSREFY61UEA Ð Ð TWBSREFY61UEA Ð
SE KWBSRFFY61UEA Ð Ð TWBSRFFY61UEA Ð
SE Ð Ð Ð TWBSRHFY61UEA Ð
LHDS KWBSLEFY61UGA KWBSLEFY61USP TWBSLEFY61USP TWBSLEFY61UGA Ð
SEKWBSLFFY61UGA Ð TWBSLFFY61USP TWBSLFFY61UGA Ð
Ð Ð Ð TWBSLFFY61USA Ð
SEÐ Ð Ð TWBSLHFY61UGA Ð
Ð Ð Ð TWBSLHFY61USA Ð
Pre®x and suffix designations
TWBSLEFY61 UGA
A: 3rd seat forward facing
P: without 3rd seat
E: RHD for Europe
G: Central/South Europe
S: North Europe
U: Turbocharger engine
F: 5-speed ¯oor shift manual transmission
E:SF:SEH:SE
L: LH drive R: RH drive
S: Long wheelbase (4WD)
WB: RD28ETi engine
T: Station Wagon
K: Hardtop
IDENTIFICATION INFORMATION
GI-35

Identi®cation Number
VEHICLE IDENTIFICATION NUMBER (Chassis number)
Pre®x and suffix designations
JN1TDSY61 U0XXXXXX
Vehicle serial number
0: Stopgap (no meaning)
U: For Europe
S: Long wheelbase
D: RD28ETi engine
T: Station Wagon K: Hardtop
JN1: Japan produced vehicle
SGI037A
Vehicle identi®cation plate
Vehicle
identi®cation
numberFront
IDENTIFICATION INFORMATION
GI-36

IDENTIFICATION PLATE
ENGINE SERIAL NUMBER
MANUAL TRANSMISSION SERIAL NUMBER
TRANSFER SERIAL NUMBER
SGI851
SGI028A
SGI018A
SGI020A
IDENTIFICATION INFORMATION
Identi®cation Number (Cont'd)
GI-37