Nissan Murano Z50 (2006 year). Manual — part 135

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How to Read Wiring Diagrams

NAS00051

CONNECTOR SYMBOLS

Most of connector symbols in wiring diagrams are shown from the terminal side.

●

Connector symbols shown from the terminal side are enclosed
by a single line and followed by the direction mark.

●

Connector symbols shown from the harness side are enclosed
by a double line and followed by the direction mark.

●

Certain systems and components, especially those related to
OBD, may use a new style slide-locking type harness connector.
For description and how to disconnect, refer to PG section,
“Description”, “HARNESS CONNECTOR”.

●

Male and female terminals
Connector guides for male terminals are shown in black and
female terminals in white in wiring diagrams.

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SAMPLE/WIRING DIAGRAM - EXAMPL -

●

For detail, refer to following “DESCRIPTION”.

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Optional Splice

DESCRIPTION

SGI942

Num-

ber

Item

Description

1

Power condition

●

This shows the condition when the system receives battery positive voltage (can be oper-
ated).

2

Fusible link

●

The double line shows that this is a fusible link.

●

The open circle shows current flow in, and the shaded circle shows current flow out.

3

Fusible link/fuse loca-
tion

●

This shows the location of the fusible link or fuse in the fusible link or fuse box. For arrange-
ment, refer to PG section, POWER SUPPLY ROUTING.

4

Fuse

●

The single line shows that this is a fuse.

●

The open circle shows current flow in, and the shaded circle shows current flow out.

5

Current rating

●

This shows the current rating of the fusible link or fuse.

6

Connectors

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This shows that connector E3 is female and connector M1 is male.

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The G/R wire is located in the 1A terminal of both connectors.

●

Terminal number with an alphabet (1A, 5B, etc.) indicates that the connector is SMJ connec-
tor. Refer to PG section, SMJ (SUPER MULTIPLE JUNCTION).

7

Optional splice

●

The open circle shows that the splice is optional depending on vehicle application.

8

Splice

●

The shaded circle shows that the splice is always on the vehicle.

9

Page crossing

●

This arrow shows that the circuit continues to an adjacent page.

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The A will match with the A on the preceding or next page.

10

Common connector

●

The dotted lines between terminals show that these terminals are part of the same connector.

11

Option abbreviation

●

This shows that the circuit is optional depending on vehicle application.

12

Relay

●

This shows an internal representation of the relay. For details, refer to PG section, STAN-
DARDIZED RELAY.

13

Connectors

●

This shows that the connector is connected to the body or a terminal with bolt or nut.

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14

Wire color

●

This shows a code for the color of the wire.

B = Black
W = White
R = Red
G = Green
L = Blue
Y = Yellow
LG = Light Green

BR = Brown
OR or O = Orange
P = Pink
PU or V (Violet) = Purple
GY or GR = Gray
SB = Sky Blue
CH = Dark Brown
DG = Dark Green

When the wire color is striped, the base color is given first, followed by the stripe color as shown
below:
Example: L/W = Blue with White Stripe

15

Option description

●

This shows a description of the option abbreviation used on the page.

16

Switch

●

This shows that continuity exists between terminals 1 and 2 when the switch is in the A posi-
tion. Continuity exists between terminals 1 and 3 when the switch is in the B position.

17

Assembly parts

●

Connector terminal in component shows that it is a harness incorporated assembly.

18

Cell code

●

This identifies each page of the wiring diagram by section, system and wiring diagram page
number.

19

Current flow arrow

●

Arrow indicates electric current flow, especially where the direction of standard flow (vertically
downward or horizontally from left to right) is difficult to follow.

●

A double arrow “

” shows that current can flow in either direction depending on cir-

cuit operation.

20

System branch

●

This shows that the system branches to another system identified by cell code (section and
system).

21

Page crossing

●

This arrow shows that the circuit continues to another page identified by cell code.

●

The C will match with the C on another page within the system other than the next or preced-
ing pages.

22

Shielded line

●

The line enclosed by broken line circle shows shield wire.

23

Component box in
wave line

●

This shows that another part of the component is also shown on another page (indicated by
wave line) within the system.

24

Component name

●

This shows the name of a component.

25

Connector number

●

This shows the connector number.

●

The letter shows which harness the connector is located in.

●

Example: M : main harness. For detail and to locate the connector, refer to PG section "Main
Harness", “Harness Layout”. A coordinate grid is included for complex harnesses to aid in
locating connectors.

26

Ground (GND)

●

The line spliced and grounded under wire color shows that ground line is spliced at the
grounded connector.

27

Ground (GND)

●

This shows the ground connection. For detailed ground distribution information, refer to
"Ground Distribution" in PG section.

28

Connector views

●

This area shows the connector faces of the components in the wiring diagram on the page.

29

Common component

●

Connectors enclosed in broken line show that these connectors belong to the same compo-
nent.

30

Connector color

●

This shows a code for the color of the connector. For code meaning, refer to wire color codes,
Number 14 of this chart.

31

Fusible link and fuse
box

●

This shows the arrangement of fusible link(s) and fuse(s), used for connector views of
"POWER SUPPLY ROUTING" in PG section.
The open square shows current flow in, and the shaded square shows current flow out.

32

Reference area

●

This shows that more information on the Super Multiple Junction (SMJ) and Joint Connectors
(J/C) exists on the PG section. Refer to "Reference Area" for details.

Num-

ber

Item

Description

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Harness Indication

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Letter designations next to test meter probe indicate harness
(connector) wire color.

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Connector numbers in a single circle M33 indicate harness con-
nectors.

Component Indication

Connector numbers in a double circle F211 indicate component connectors.

Switch Positions

Switches are shown in wiring diagrams as if the vehicle is in the “normal” condition.
A vehicle is in the “normal” condition when:

●

ignition switch is “OFF”,

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doors, hood and trunk lid/back door are closed,

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pedals are not depressed, and

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parking brake is released.

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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 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.

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Multiple Switch

The continuity of multiple switch is described in two ways as shown below.

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The switch chart is used in schematic diagrams.

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The switch diagram is used in wiring diagrams.

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Reference Area

The Reference Area of the wiring diagram contains references to additional electrical reference pages at the
end of the manual. If connector numbers and titles are shown in the Reference Area of the wiring diagram,
these connector symbols are not shown in the Connector Area.

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Abbreviations

NAS00052

The following ABBREVIATIONS are used:

ABBREVIATION

DESCRIPTION

A/C

Air Conditioner

A/T

Automatic Transaxle/Transmission

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

FR, RR

Front, Rear

LH, RH

Left-Hand, Right-Hand

M/T

Manual Transaxle/Transmission

OD

Overdrive

P/S

Power Steering

SAE

Society of Automotive Engineers, Inc.

SDS

Service Data and Specifications

SST

Special Service Tools

2WD

2-Wheel Drive

2

2

2nd range 2nd gear

2

1

2nd range 1st gear

1

2

1st range 2nd gear

1

1

1st range 1st gear

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SERVICE INFORMATION FOR ELECTRICAL INCIDENT

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SERVICE INFORMATION FOR ELECTRICAL INCIDENT

PFP:00000

How to Check Terminal

NAS00053

CONNECTOR AND TERMINAL PIN KIT

Use the connector and terminal pin kits listed below when replacing connectors or terminals.
The connector and terminal pin kits contain some of the most commonly used NISSAN/INFINITI connectors
and terminals. For detailed connector and terminal pin replacement procedures, refer to the latest NISSAN/
INFINITI CONNECTOR AND TERMINAL PIN SERVICE MANUAL.

HOW TO PROBE CONNECTORS

Connector damage and an intermittent connection can result from improperly probing of the connector during
circuit checks.
The probe of a digital multimeter (DMM) may not correctly fit the connector cavity. To correctly probe the con-
nector, follow the procedures below using a “T” pin. For the best contact grasp the “T” pin using an alligator
clip.

Probing from Harness Side

Standard type (not waterproof type) connector should be probed
from harness side with “T” pin.

●

If the connector has a rear cover such as a ECM connector,
remove the rear cover before probing the terminal.

●

Do not probe waterproof connector from harness side. Damage
to the seal between wire and connector may result.

Probing from Terminal Side

FEMALE TERMINAL

●

There is a small notch above each female terminal. Probe each
terminal with the “T” pin through the notch.
Do not insert any object other than the same type male terminal
into female terminal.

Tool number

(Kent-Moore No.)

Tool name

Description

-
(J38751-95NI)
Connector and terminal
pin kit (NISSAN)
-
(J38751-95INF)
Connector and terminal
pin kit (INFINITI)
-
(J42992-98KIT)
OBD and terminal repair
kit
-
(J42992-2000UPD)
OBD-II Connector Kit
Update

WAIA0004E

WAIA0005E

SGI841

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SERVICE INFORMATION FOR ELECTRICAL INCIDENT

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●

Some connectors do not have a notch above each terminal. To
probe each terminal, remove the connector retainer to make
contact space for probing.

MALE TERMINAL
Carefully probe the contact surface of each terminal using a “T” pin.
Do not bend terminal.

How to Check Enlarged Contact Spring of Terminal

An enlarged contact spring of a terminal may create intermittent signals in the circuit.
If the intermittent open circuit occurs, follow the procedure below to inspect for open wires and enlarged con-
tact spring of female terminal.

1.

Assemble a male terminal and approx. 10 cm (3.9 in) of wire.
Use a male terminal which matches the female terminal.

2.

Disconnect the suspected faulty connector and hold it terminal
side up.

3.

While holding the wire of the male terminal, try to insert the male
terminal into the female terminal.
Do not force the male terminal into the female terminal with
your hands.

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4.

While moving the connector, check whether the male terminal
can be easily inserted or not.

●

If the male terminal can be easily inserted into the female termi-
nal, replace the female terminal.

Waterproof Connector Inspection

If water enters the connector, it can short interior circuits. This may lead to intermittent problems.
Check the following items to maintain the original waterproof characteristics.

RUBBER SEAL INSPECTION

●

Most waterproof connectors are provided with a rubber seal
between the male and female connectors. If the seal is missing,
the waterproof performance may not meet specifications.

●

The rubber seal may come off when connectors are discon-
nected. Whenever connectors are reconnected, make sure the
rubber seal is properly installed on either side of male or female
connector.

WIRE SEAL INSPECTION
The wire seal must be installed on the wire insertion area of a waterproof connector. Be sure that the seal is
installed properly.

Terminal Lock Inspection

Check for unlocked terminals by pulling wire at the end of connector.
An unlocked terminal may create intermittent signals in the circuit.

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How to Perform Efficient Diagnosis for an Electrical Incident

NAS00054

WORK FLOW

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 fol-
lowing 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

SGI838

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:

WHAT

Vehicle Model, Engine, Transmission/Transaxle and the System (i.e. Radio).

WHEN

Date, Time of Day, Weather Conditions, Frequency.

WHERE

Road Conditions, Altitude and Traffic Situation.

HOW

System 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 cannot be duplicated, refer to “Incident Simulation Tests”.

STEP 3

Get the proper diagnosis materials together including:

●

Power Supply Routing

●

System Operation Descriptions

●

Applicable Service Manual Sections

●

Check for any Service Bulletins

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.

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●

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 following illustra-
tion.

CONNECTORS & HARNESS
Determine which connectors and wiring harness would affect the electrical system you are inspecting. Gently
shake each connector and harness while monitoring the system for the incident you are trying to duplicate.
This test may indicate a loose or poor electrical connection.

HINT
Connectors can be exposed to moisture. It is possible to get a thin film of corrosion on the connector termi-
nals. A visual inspection may not reveal this without disconnecting the connector. If the problem occurs inter-
mittently, 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
Gently apply 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.

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 integrity of ground connections. (Refer to Ground
Inspection described later.) First check that the system is properly grounded. Then check for loose connection
by gently shaking the 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. Vehi-
cle vibration can aggravate a harness which is routed along a bracket or near a screw.

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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 possible damage or
pinching.

Heat Sensitive

The customer's concern 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 60

°

C (140

°

F). If incident occurs

while heating the unit, either replace or properly insulate the compo-
nent.

Freezing

The customer may indicate the incident goes away after the car
warms up (winter time). The cause could be related to water freezing
somewhere in the wiring/electrical system.
There are two methods to check for this. The first is to arrange for
the owner to leave his car overnight. Make sure it will get cold
enough to demonstrate his complaint. Leave the car parked outside
overnight. In the morning, do a quick and thorough diagnosis of
those electrical components which could be affected.
The second method is to put the suspect component into a freezer
long enough for any water to freeze. Reinstall the part into the car
and check for the reoccurrence of the incident. If it occurs, repair or
replace the component.

Water Intrusion

The incident may occur only during high humidity or in rainy/snowy
weather. In such cases the incident could be caused by water intru-
sion on an electrical part. This can be simulated by soaking the car
or running it through a car wash.
Do not spray water directly on any electrical components.

Electrical Load

The incident may be electrical load sensitive. Perform diagnosis with
all accessories (including A/C, rear window defogger, radio, fog
lamps) turned on.

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