The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.

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 inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

●

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

●

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.

PREPARATION

SC-3

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2005 Murano

PREPARATION

PFP:00002

Special Service Tools

AKS004EU

Commercial Service Tools

AKS004EV

Tool number
Tool name

Description

J-44373 Model 620
Battery/Starting/Charging system
tester

SEL403X

Tool number
Tool name

Description

Power tool

Loosening bolts and nuts

PBIC0190E

SC-4

BATTERY

Revision: 2005 August

2005 Murano

BATTERY

PFP:AYBGL

How to Handle Battery

AKS004EW

CAUTION:

●

If it becomes necessary to start the engine with a booster battery and jumper cables, use a 12-volt
booster battery.

●

After connecting battery cables, ensure that they are tightly clamped to battery terminals for good
contact.

METHODS OF PREVENTING OVER-DISCHARGE

The following precautions must be taken to prevent over-discharging
a battery.

●

The battery surface (particularly its top) should always be kept
clean and dry.

●

The terminal connections should be clean and tight.

●

At every routine maintenance, check the electrolyte level.
This also applies to batteries designated as “low maintenance”
and “maintenance-free”.

●

When the vehicle is not going to be used over a long period of
time, disconnect the battery cable from the negative terminal.

●

Check the charge condition of the battery.
Periodically check the specific gravity of the electrolyte. Keep a
close check on charge condition to prevent over-discharge.

MEL040F

ELA0349D

MEL042F

BATTERY

SC-5

Revision: 2005 August

2005 Murano

CHECKING ELECTROLYTE LEVEL

WARNING:

Never allow battery fluid to come in contact with skin, eyes, fabrics, or painted surfaces. After touch-
ing a battery, never touch or rub your eyes until you have thoroughly washed your hands. If acid con-
tacts eyes, skin or clothing, immediately flush with water for 15 minutes and seek medical attention.

●

Remove the cell plug using a suitable tool.

●

Add distilled water up to the MAX level.

Sulphation

A battery will be completely discharged if it is left unattended
for a long time and the specific gravity will become less than
1.100. This may result in sulphation on the cell plates.
To determine if a battery has been “sulphated”, note its voltage
and current when charging it. As shown in the figure, less cur-
rent and higher voltage are observed in the initial stage of
charging sulphated batteries.
A sulphated battery may sometimes be brought back into ser-
vice by means of a long, slow charge, 12 hours or more, fol-
lowed by a battery capacity test.

SPECIFIC GRAVITY CHECK

Read hydrometer and thermometer indications at eye level.

Use the chart below to correct your hydrometer reading accord-
ing to electrolyte temperature.

Hydrometer Temperature Correction

MEL043F

PKIA2353E

MEL042FA

Battery electrolyte temperature

C (

Add to specific gravity reading

71 (160)

0.032

66 (150)

0.028

60 (140)

0.024

54 (130)

0.020

49 (120)

0.016

43 (110)

0.012

38 (100)

0.008

32 (90)

0.004

27 (80)

21 (70)

−

0.004

SC-6

BATTERY

Revision: 2005 August

2005 Murano

CHARGING THE BATTERY

CAUTION:

●

Never “quick charge” a fully discharged battery.

●

Keep the battery away from open flame while it is being charged.

●

When connecting the charger, connect the leads first, then turn on the charger. Never turn on the
charger first, as this may cause a spark.

●

If battery electrolyte temperature rises above 55

C (131

F), stop charging. Always charge battery

at a temperature below 55

C (131

F).

Charging Rates

Never charge at more than 50 ampere rate.

NOTE:
The ammeter reading on your battery charger will automatically decrease as the battery charges. This indi-
cates that the voltage of the battery is increasing normally as the state of charge improves. The charging amps
indicated above refer to initial charge rate.

●

If, after charging, the specific gravity of any two cells varies more than 0.050, the battery should be
replaced.

Trouble Diagnosis with Battery/Starting/Charging System Tester

AKS004EX

CAUTION:

When working with batteries, always wear appropriate eye protection.

NOTE:

●

To ensure a complete and thorough diagnosis, the battery, starter and alternator test segments must be
done as a set from start to finish.

●

If battery surface charge is detected while testing, the tester will prompt you to turn on the headlamps to
remove the surface charge.

●

If necessary, the tester will prompt you to determine if the battery temperature is above or below 0

C (32

F). Choose the appropriate selection by pressing the up or down arrow button, then press “ENTER” to

make the selection.

16 (60)

−

0.008

10 (50)

−

0.012

4 (40)

−

0.016

−

1 (30)

−

0.020

−

7 (20)

−

0.024

−

12 (10)

−

0.028

−

18 (0)

−

0.032

Corrected specific gravity

Approximate charge condition

1.260 - 1.280

Fully charged

1.230 - 1.250

3/4 charged

1.200 - 1.220

1/2 charged

1.170 - 1.190

1/4 charged

1.140 - 1.160

Almost discharged

1.110 - 1.130

Completely discharged

Battery electrolyte temperature

C (

Add to specific gravity reading

Amps

Time

1 hour

2 hours

5 hours

10 hours

BATTERY

SC-7

Revision: 2005 August

2005 Murano

Turn off all loads on the vehicle electrical system. Clean or repair
as necessary.

Visually inspect the battery, battery terminals and cable ends
with ignition switch in “OFF” position.
NOTE:
The contact surface between the battery terminals, cable ends
and tester leads must be clean for a valid test. A poor connec-
tion will prevent testing and a “CHECK CONNECTION” mes-
sage will appear during the test procedures. If this occurs, clean
the battery terminals, reconnect them and restart the test.

Connect the red tester lead clamp to the positive battery termi-
nal, and the black to the negative terminal.

The tester will turn on automatically. Using the arrow keys,
select “IN-VEHICLE” on the tester and then press the “ENTER”
key.

Locate the battery type and rating stamped or written on the top
case of the battery to be tested.

NOTE:
The battery type and rating will have either of the following.
CCA: Cold Cranking Amps (490 CCA, 550 CCA, etc.)
JIS: Japanese Industrial Standard.
Battery is stamped with a number such as:
80D26L: 80 (rank of output), D (physical size-depth), 26 (width
in cm). The last character L (post configuration) is not input into
the tester.
The tester requires the rating for the battery be entered exactly
as it is written or stamped on the battery. Do not attempt a CCA
conversion for JIS stamped batteries. JIS must be input directly.

Using the arrow and “ENTER” keys alternately, select the battery type and rating.

NOTE:
The tester lists five choices; CCA, JIS, IEC, DIN, and EN. Only use CCA or JIS.

Press “ENTER” to begin the test. Diagnosis results are dis-
played on the tester. Refer to

SC-8, "DIAGNOSTIC RESULT

ITEM CHART"

SEL404X

SEL405X

SEL406X

SEL407X

SC-8

BATTERY

Revision: 2005 August

2005 Murano

Press “ENTER”, then test output code is displayed. Record the
test output code on the repair order.

Toggle back to the “DIAGNOSTIC SCREEN” for test results.

NOTE:

●

If necessary, the tester will ask the user to determine if the
battery has just been charged. Choose the appropriate selec-
tion by pressing the up or down arrow button and then press
the “ENTER” button to make the selection.

●

When testing a battery installed in a vehicle that has recently
been driven, select “BEFORE CHARGE”.

●

If the battery has just been slow charged due to a “CHARGE
& RETEST” decision by the tester, and the tester asks the user “BEFORE CHARGE/AFTER
CHARGE”, select “AFTER CHARGE”.

DIAGNOSTIC RESULT ITEM CHART

Removal and Installation

AKS004EY

REMOVAL

Disconnect both battery cables from terminals.

CAUTION:

When disconnecting, disconnect the battery cable from the
negative terminal first.

Remove battery fix frame mounting nuts and battery fix frame.

Remove battery cover.

Remove battery.

Remove battery tray.

INSTALLATION

Installation is the reverse order of removal.

CAUTION:

When connecting, connect the battery cable to the positive terminal first.

SEL576X

Diagnostic item

Service procedure

GOOD BATTERY

Battery is OK, go to “Trouble Diagnosis”,“STARTING SYSTEM”. Refer to

SC-11, "Trouble Diagnosis with Bat-

tery/Starting/Charging System Tester"

REPLACE BATTERY

Replace battery.
Before replacing battery, clean the battery cable clamps and battery posts. Perform battery test again with
Battery/Starting/Charging system tester. If second test result is “Replace Battery”, then do so. Perform battery
test again to confirm repair.

BAD CELL-REPLACE

Replace the battery. Perform battery test again with Battery/Starting/Charging system tester to confirm repair.

GOOD-RECHARGE

Perform the slow battery charging procedure. (Initial rate of charge is 10A for 12 hours.)

CHARGE & RETEST

Perform the slow battery charging. (Initial rate of charge is 10A for 12 hours.)
Perform battery test again with Battery/Starting/Charging system tester to confirm repair.

NOTE:
If the tester asks the user “BEFORE CHARGE/AFTER CHARGE”, select “AFTER CHARGE”.

PKIA2421E

Battery fix frame mounting nut

: 3.9 N·m (0.4 kg-m, 35 in-lb)

Battery terminal nut

: 5.4 N·m (0.55 kg-m, 48 in-lb)

STARTING SYSTEM

SC-9

Revision: 2005 August

2005 Murano

STARTING SYSTEM

PFP:23300

System Description

AKS004EZ

Power is supplied at all times

●

through 40A fusible link (letter M, located in the fuse and fusible link block)

●

to ignition switch terminal 1,

●

through 15A fuse (No. 78, located in the IPDM E/R)

●

to CPU of IPDM E/R,

●

through 10A fuse (No. 71, located in the IPDM E/R)

●

to CPU of IPDM E/R.

With the ignition switch in the ON or START position, power is supplied

●

through ignition relay (within the IPDM E/R)

●

to CPU of IPDM E/R.

When the selector lever in the P or N position, power is supplied

●

from TCM terminal 24

●

to IPDM E/R terminal 53.

Ground is supplied

●

to IPDM E/R terminals 38, 50 and 60

●

from grounds E13, E26 and E28.

Then starter relay is turn ON.
With the ignition switch in the START position, IPDM E/R is energized and power is supplied

●

from ignition switch terminal 5

●

to IPDM E/R terminal 4 and

●

through IPDM E/R terminal 3

●

to starter motor terminal 1.

The starter motor plunger closes and provides a closed circuit between the battery and starter motor. The
starter motor is grounded to the engine block. With power and ground supplied, cranking occurs and the
engine starts.

SC-10

STARTING SYSTEM

Revision: 2005 August

2005 Murano

Wiring Diagram — START —

AKS004F0

TKWA1673E

STARTING SYSTEM

SC-11

Revision: 2005 August

2005 Murano

Trouble Diagnosis with Battery/Starting/Charging System Tester

AKS004F1

NOTE:
To ensure a complete and thorough diagnosis, the battery, starter and alternator test segments must be done
as a set from start to finish.

Turn off all loads on the vehicle electrical system.

Perform battery test with Battery/Starting/Charging system
tester. Refer to

SC-6, "Trouble Diagnosis with Battery/Starting/

Charging System Tester"

Press “ENTER” to begin the starting system test.

Start the engine.

Diagnostic result is displayed on the tester. Refer to

SC-11,

"DIAGNOSTIC RESULT ITEM CHART"

NOTE:

●

If the starter performs normally but the engine does not start,
perform engine diagnosis.

●

For intermittent “NO CRANK” or “NO STARTER OPERA-
TION” incidents, refer to

SC-14, "DIAGNOSTIC PROCE-

DURE 2"

DIAGNOSTIC RESULT ITEM CHART

SEL408X

SEL409X

SEL410X

Diagnostic item

Service procedure

CRANKING VOLTAGE NORMAL

Go to

SC-12, "WORK FLOW"

CRANKING VOLTAGE LOW

CHARGE BATTERY

Perform the slow battery charging procedure. (Initial rate of charge is 10A for 12 hours.) Perform
battery test again with Battery/Starting/Charging system tester. Refer to

SC-6, "Trouble Diagnosis

with Battery/Starting/Charging System Tester"

REPLACE BATTERY

Before replacing battery, clean the battery cable clamps and battery posts. Perform battery test
again with Battery/Starting/Charging system tester. Refer to

SC-6, "Trouble Diagnosis with Bat-

tery/Starting/Charging System Tester"

. If second test result is “REPLACE BATTERY”, then do so.

Perform battery test again to confirm repair.

SC-12

STARTING SYSTEM

Revision: 2005 August

2005 Murano

WORK FLOW

SKIB1369E

SC-11, "Trouble Diagnosis with Battery/
Starting/Charging System Tester"

SC-14, "MINIMUM SPECIFICATION
OF CRANKING VOLTAGE REFER-
ENCING COOLANT TEMPERA-
TURE"

SC-13, "Check “B” Terminal Circuit"

SC-14, "Check “S” Connector Circuit"

STARTING SYSTEM

SC-13

Revision: 2005 August

2005 Murano

DIAGNOSTIC PROCEDURE 1
Check “B” Terminal Circuit

CHECK POWER SUPPLY FOR STARTER MOTOR “B” TERMINAL

Remove fuel pump fuse.

Crank or start the engine (where possible) until the fuel pressure is released.

Turn ignition switch OFF.

Make sure the starter motor “B” terminal F38 terminal 2 (B/R)
connection is clean and tight.

Check voltage between starter motor “B” terminal F38 terminal 2
(B/R) and ground using a digital circuit tester.

OK or NG

>> GO TO 2.

>> Check harness between battery and starter motor for

open circuit.

CHECK BATTERY CABLE CONNECTION (VOLTAGE DROP TEST)

Check voltage between starter motor “B” terminal F38 terminal 2 (B/
R) and battery positive terminal.

OK or NG

>> GO TO 3.

>> Check harness between battery and starter motor for

poor continuity.

CHECK STARTER MOTOR GROUND CIRCUIT (VOLTAGE DROP TEST)

Turn ignition switch OFF.

Check voltage between starter motor case and battery negative
terminal.

OK or NG

>> “B” terminal circuit is OK. Further inspection necessary.

Refer to

SC-12, "WORK FLOW"

>> Check starter motor case and ground for poor continuity.

2 (B/R) – Ground

: Battery voltage

PKIA2842E

2 (B/R) – Battery positive terminal

When the ignition switch is in
START position

: Less than 0.5 V

PKIA2370E

Starter motor case – Battery negative terminal

When the ignition switch is in
START position

: Less than 0.2 V

PKIB6089E

SC-14

STARTING SYSTEM

Revision: 2005 August

2005 Murano

DIAGNOSTIC PROCEDURE 2
Check “S” Connector Circuit

CHECK POWER SUPPLY FOR STARTER MOTOR “S” TERMINAL

Remove fuel pump fuse.

Crank or start the engine (where possible) until the fuel pressure is released.

Turn the ignition switch OFF.

Disconnect starter motor connector.

Check voltage between starter motor harness connector F5 ter-
minal 1 (B/W) and ground.

OK or NG

>> “S” connector circuit is OK. Further inspection neces-

sary. Refer to

SC-12, "WORK FLOW"

>> Check the following.

●

40A fusible link (letter M, located in the fuse and fusible link block)

●

Ignition switch

●

Starter relay (within the IPDM)

●

Harness for open or short

MINIMUM SPECIFICATION OF CRANKING VOLTAGE REFERENCING COOLANT TEMPERA-
TURE

1 (B/W) – Ground

When the ignition switch is
in START position

: Battery voltage

PKIB5303E

Engine coolant temperature

Voltage [V]

−

C to

−

C (

−

F to

−

8.4

−

C to

−

C (

−

F to 14

8.9

−

C to 0

C (16

F to 32

9.3

More than 1

C (More than 34

9.7

Content .. 206 207 208 209 ..