Nissan Murano Z50 (2005 year). Manual

STARTING SYSTEM

SC-15

Revision: 2005 August

2005 Murano

Removal and Installation

AKS004F2

REMOVAL

Remove battery. Refer to

SC-8, "Removal and Installation"

Remove air duct (inlet). Refer to

EM-16, "AIR CLEANER AND AIR DUCT"

Remove battery bracket, using power tools.

Remove fluid charging pipe. Refer to

CVT-232, "Removal and

Installation"

Disconnect “S” connector.

Remove “B” terminal nut.

Remove starter motor mounting bolts, using power tools.

Remove starter motor upward from the vehicle.

INSTALLATION

Installation is the reverse order of removal.

CAUTION:

Be sure to tighten “B” terminal nut carefully.

Starter motor

B terminal harness

B terminal nut

S connector

PKIA2424E

PKIA2851E

PKIA2425E

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STARTING SYSTEM

Revision: 2005 August

2005 Murano

Disassembly and Assembly

AKS004F3

INSPECTION AFTER DISASSEMBLY
Pinion/Clutch Check

Inspect pinion teeth.

●

Replace pinion if teeth are worn or damaged. (Also check condition of ring gear teeth.)

Inspect reduction gear teeth.

●

Replace reduction gear if teeth are worn or damaged. (Also check condition of armature shaft gear
teeth.)

Check to see if pinion locks in one direction and rotates smoothly in the opposite direction.

●

If it locks or rotates in both directions, or unusual resistance is evident, replace.

Stopper ring

Pinion stopper

Pinion assembly

Pinion spring

Front bracket assembly

Shift lever

Plate

Packing

Plate

10. Magnetic switch assembly

11. Clutch gear assembly

12. Internal gear assembly

13. Gear shaft assembly

14. Gear assembly

15. Ball

16. Packing

17. Yoke assembly

18. Armature assembly

19. Brush assembly

20. Metal

21. Rear cover

Through-bolt

: 8 N·m (0.84 kg-m, 71 in-lb)

PKIA2426E

CHARGING SYSTEM

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Revision: 2005 August

2005 Murano

CHARGING SYSTEM

PFP:23100

System Description

AKS004F5

The alternator provides DC voltage to operate the vehicle's electrical system and to keep the battery charged.
The voltage output is controlled by the IC regulator.
Power is supplied at all times

●

through 10A fuse (No. 33, located in the fuse and fusible link block)

●

to alternator terminal 4 (“S” terminal).

“B” terminal supplies power to charge the battery and operate the vehicle's electrical system. Output voltage is
controlled by the IC regulator at terminal 4 (“S” terminal) detecting the input voltage.
The alternator is grounded to the engine block.
With the ignition switch in the ON or START position, power is supplied

●

through 10A fuse [No. 14, located in the fuse block (J/B)]

●

to combination meter terminal 20 for the charge warning lamp.

Ground is supplied

●

to combination meter terminal 4

●

through alternator terminal 3 (“L” terminal)

●

to alternator terminal 2 (“E” terminal)

●

through ground E29.

With power and ground supplied, the charge warning lamp will illuminate. When the alternator is providing suf-
ficient voltage with the engine running, the ground is opened and the charge warning lamp will go off.
If the charge warning lamp illuminates with the engine running, a malfunction is indicated.

MALFUNCTION INDICATOR

The IC regulator warning function activates to illuminate charge warning lamp, if any of the following symp-
toms occur while alternator is operating:

●

Excessive voltage is produced.

●

No voltage is produced.

CHARGING SYSTEM

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Revision: 2005 August

2005 Murano

Trouble Diagnosis with Battery/Starting/Charging System Tester

AKS004F7

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.
Before starting, perform the preliminary inspection. Refer to

SC-22, "PRELIMINARY INSPECTION"

Turn off all loads on the vehicle electrical system.

Perform battery and starting system test with Battery/Starting/
Charging system tester.

Press “ENTER” to begin the charging system test.

Start engine.

Press “ENTER” until “LOADS OFF REV ENGINE 5 SEC” is dis-
played.

Raise and hold the engine speed at 1,500 to 2,000 rpm for about
5 seconds, then return the engine to idle.
Once the increase in engine rpm is detected, press “ENTER” to
continue.

NOTE:

●

If after 30 seconds an increase in engine idle speed is not
detected, “RPM NOT DETECTED” will display.

●

Some engines may have a higher idle initially after starting,
particularly when the engine is cold. The tester may detect
this without any other action being taken. If this occurs, con-
tinue on with the testing process. The final results will not be affected.

The tester now checks the engine at idle and performs the
DIODE/RIPPLE check.

When complete, the tester will prompt you to turn on the follow-
ing electrical loads.

●

Heater fan set to highest speed. Do not run the A/C or wind-
shield defroster.

●

Headlamp high beam

●

Rear window defogger

NOTE:
Do not run the windshield wipers or any other cyclical loads.

Press “ENTER” to continue.

SEL417X

SEL418X

SEL419X

SEL420X

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CHARGING SYSTEM

Revision: 2005 August

2005 Murano

10. Raise and hold the engine speed at 1,500 to 2,000 rpm for about

5 seconds, then return the engine to idle. Once the increase in
engine rpm is detected, press “ENTER” to continue.

NOTE:
If after 30 seconds an increase in engine idle speed is not
detected, “RPM NOT DETECTED” will be displayed. Press
“ENTER” to restart the test.

11. Diagnostic result is displayed on the tester. Refer to

SC-20,

"DIAGNOSTIC RESULT ITEM CHART"

12. Press “ENTER” then test output code is displayed. Record the

test output code on the repair order.

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

DIAGNOSTIC RESULT ITEM CHART

SEL421X

SEL422X

SEL577X

Diagnostic item

Service procedure

CHARGING SYSTEM NORMAL

Charging system is normal and will also show DIODE RIPPLE test result.

NO CHARGING VOLTAGE

Go to

SC-21, "WORK FLOW"

LOW CHARGING VOLTAGE

HIGH CHARGING VOLTAGE

DIODE RIPPLE NORMAL

Diode ripple is OK and will also show CHARGING VOLTAGE test result.

EXCESS RIPPLE DETECTED

Replace the alternator. Perform “DIODE RIPPLE” test again using Battery/Starting/Charging sys-
tem tester to confirm repair.

DIODE RIPPLE NOT DETECTED

Go to

SC-21, "WORK FLOW"

SC-22

CHARGING SYSTEM

Revision: 2005 August

2005 Murano

PRELIMINARY INSPECTION

CHECK BATTERY TERMINALS CONNECTION

Check if battery terminals are clean and tight.

OK or NG

>> GO TO 2.

>> Repair battery terminals connection.

CHECK FUSE AND FUSIBLE LINK

Check for blown alternator and combination meter fuses.

OK or NG

>> GO TO 3.

>> If fuse is blown, be sure eliminate cause of malfunction before installing new fuse.

CHECK “E” TERMINAL CONNECTION

Check if “E” terminal is clean and tight.

OK or NG

>> GO TO 4.

>> Repair “E” terminal connection.

CHECK ALTERNATOR DRIVE BELT TENSION

Check alternator drive belt tension. Refer to

EM-13, "Checking Drive Belts"

OK or NG

>> INSPECTION END

>> Repair as needed.

Unit

Power source (Power supply terminals)

Fuse No.

Alternator

Battery (“S” terminal)

Combination meter

Ignition switch ON (“L” terminal)

CHARGING SYSTEM

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2005 Murano

DIAGNOSTIC PROCEDURE 1
Check “L” Terminal Circuit (Open)

CHECK “L” TERMINAL CONNECTION

Turn ignition switch OFF.

Check if “L” terminal is clean and tight.

OK or NG

>> GO TO 2.

>> Repair “L” terminal connection. Confirm repair by performing complete Battery/Starting/Charging

system test.

CHECK “L” TERMINAL CIRCUIT (OPEN)

Disconnect alternator connector.

Apply ground to alternator harness connector F27 terminal 3
(BR) with the ignition switch in the ON position.

OK or NG

>> Go to

SC-21, "WORK FLOW"

>> Check the following.

●

Charge warning lamp (combination meter)

●

Harness for open between combination meter and
fuse

●

Harness for open between combination meter and alternator

DIAGNOSTIC PROCEDURE 2
Check “L” Terminal Circuit (Short)

CHECK “L” TERMINAL CIRCUIT (SHORT)

Turn ignition switch OFF.

Disconnect alternator connector.

Turn ignition switch ON.

Charge warning lamp should light up?

YES

>> Check the following.

●

Harness for short between combination meter and alternator

●

Charge warning lamp (Combination meter)

>> Go to

SC-21, "WORK FLOW"

3 (BR) – Ground

: Charge warning lamp
should light up.

PKIB5304E

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CHARGING SYSTEM

Revision: 2005 August

2005 Murano

DIAGNOSTIC PROCEDURE 3
Check “S” Terminal Circuit

CHECK “S” TERMINAL CONNECTION

Turn ignition switch OFF.

Check if “S” terminal is clean and tight.

OK or NG

>> GO TO 2.

>> Repair “S” terminal connection. Confirm repair by performing complete Battery/Starting/Charging

system test.

CHECK ALTERNATOR “S” TERMINAL CIRCUIT

Disconnect alternator connector.

Check voltage between alternator harness connector F27 termi-
nal 4 (Y/B) and ground.

OK or NG

>> Go to

SC-21, "WORK FLOW"

>> Check harness for open between alternator and fuse.

4 (Y/B) – Ground

: Battery voltage

PKIB5305E

CHARGING SYSTEM

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Revision: 2005 August

2005 Murano

DIAGNOSTIC PROCEDURE 4
Check “B” Terminal Circuit

CHECK “B” TERMINAL CONNECTION

Turn ignition switch OFF.

Check if “B” terminal is clean and tight.

OK or NG

>> GO TO 2.

>> Repair “B” terminal connection. Confirm repair by performing complete Battery/Starting/Charging

system test.

CHECK ALTERNATOR “B” TERMINAL CIRCUIT

Check voltage between alternator “B” terminal F26 terminal 1 (B/R)
and ground.

OK or NG

>> GO TO 3.

>> Check harness for open between alternator and battery.

CHECK “B” TERMINAL CONNECTION (VOLTAGE DROP TEST)

Start engine.

When engine running at idle and warm, check voltage between
alternator “B” terminal F26 terminal 1 (B/R) and battery positive
terminal.

OK or NG

>> Go to

SC-21, "WORK FLOW"

>> Check harness between battery and alternator for poor

continuity.

1 (B/R) – Ground

: Battery voltage

PKIA2944E

1 (B/R) – Battery positive terminal

: Less than 0.2 V

PKIA2366E

SC-26

CHARGING SYSTEM

Revision: 2005 August

2005 Murano

Removal and Installation

AKS004F8

REMOVAL

Disconnect the battery cable from the negative terminal.

Remove engine undercover, using power tools.

Remove engine right side undercover.

Remove cooling fan. Refer to

CO-20, "COOLING FAN"

Remove exhaust manifold cover (left side) and three way catalyst cover.

Remove engine main harness (left side) clip.

Remove oil pressure sensor harness clip and connector.

Remove air conditioner compressor switch harness connector.

Remove alternator and air conditioner compressor belt. Refer to

EM-14, "Removal and Installation"

10. Remove idler pulley.

11. Remove alternator mounting nut using power tools.

12. Remove through-bolt.

Through-bolt

Cylinder block

Timing chain case

Alternator mounting nut

Alternator

Alternator connector

B terminal harness

B terminal nut

Alternator mounting bolt

10. Alternator bracket

11. Alternator bracket mounting bolt

PKIA2926J

PKIA2431E

CHARGING SYSTEM

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Revision: 2005 August

2005 Murano

13. Disconnect alternator connector.

14. Remove “B” terminal nut.

15. Remove ground harness clip and ground harness mounting nut.

16. Remove alternator mounting bolt, using power tools.

17. Remove alternator bracket mounting bolt and alternator bracket.

18. Remove alternator upward from the vehicle.

NOTE:
Move alternator to battery side, then remove alternator upward.

ALTERNATOR PULLEY INSPECTION

Perform the following.

●

Make sure that alternator pulley does not rattle.

●

Make sure that alternator pulley nut is tight.

INSTALLATION

Installation is the reverse order of removal.

●

Install alternator, and check tension of belt. Refer to

EM-13, "Checking Drive Belts"

CAUTION:

Be sure to tighten “B” terminal nut carefully.

PKIA2432E

PKIA2433E

Alternator pulley nut:

: 74 N·m (7.5 kg-m, 55 ft-lb)

SC-28

CHARGING SYSTEM

Revision: 2005 August

2005 Murano

Disassembly and Assembly

AKS004F9

Stator

Rear bearing

Rotor assembly

Retainer

Front bearing

Front cover

Pulley

Pulley nut

Fan guide

10. Double labyrinth seal

11. IC voltage regulator assembly

12. Diode assembly

13. Rear cover

14. Terminal set

15. Through-bolt

PKIB6947E

SERVICE DATA AND SPECIFICATIONS (SDS)

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Revision: 2005 August

2005 Murano

SERVICE DATA AND SPECIFICATIONS (SDS)

PFP:00030

Battery

AKS004FA

Starter

AKS004FB

Alternator

AKS004FC

Standard

Option

(With Intelligent Key)

Type

80D23L

110D26L

Capacity

12 V - 52 AH

12 V - 64 AH

Cold cranking current (For reference value)

582 A

720 A

Type

M1T68681

MITSUBISHI make

Reduction gear type

System voltage

12 V

No-load

Terminal voltage

11 V

Current

Less than 90 A

Revolution

More than 2,750 rpm

Minimum diameter of commutator

28.8 mm (1.134 in)

Minimum length of brush

5.5 mm (0.217 in)

Brush spring tension

15.0 - 20.4 N (1.53 - 20.8 kg, 3.3 - 4.5 lb)

Clearance between bearing metal and armature shaft

Less than 0.2 mm (0.008 in)

Movement in height of pinion assembly

0.5 - 2.0 mm (0.020 - 0.079 in)

Type

LR1110 - 723E

HITACHI make

Nominal rating

12 V - 110 A

Ground polarity

Negative

Minimum revolution under no-load (When 13.5 V is applied)

Less than 1,100 rpm

Hot output current (When 13.5 V is applied)

(More than 35 A/1,300 rpm)

More than 70 A/1,800 rpm

More than 91 A/2,500 rpm

More than 110 A/5,000 rpm

Regulated output voltage

14.1 - 14.7 V

Minimum length of brush

More than 6.00 mm (0.236 in)

Brush spring pressure

1.00 - 3.43 N (102 - 350 g, 3.60 - 12.34 oz)

Slip ring minimum outer diameter

More than 26.0 mm (1.024 in)

Rotor (Field coil) resistance

2.16 - 2.45

Ω

Nissan Murano Z50 (2005 year). Manual - part 209