Nissan Pathfinder (2008 year). Manual - part 126

 

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Nissan Pathfinder (2008 year). Manual - part 126

 

 

CHG-20

< SYMPTOM DIAGNOSIS >

CHARGING SYSTEM

SYMPTOM DIAGNOSIS

CHARGING SYSTEM

Symptom Table

INFOID:0000000001712771

Symptom

Reference

Battery discharged

Refer to 

CHG-4, "Work Flow"

.

The charge warning lamp does not illuminate when the ignition 
switch is set to ON.

The charge warning lamp does not turn OFF after the engine 
starts.

The charging warning lamp turns ON when increasing the engine 
speed.

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GENERATOR

CHG-21

< ON-VEHICLE REPAIR >

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ON-VEHICLE REPAIR

GENERATOR

Removal and Installation

INFOID:0000000001283043

VQ40DE MODELS

Removal

1.

Disconnect the negative battery terminal.

2.

Remove the fan shroud. Refer to 

CO-16, "Removal and Installation"

.

3.

Remove the drive belt. Refer to 

EM-13, "Removal and Installation"

.

4.

Remove the generator stay, using power tools. 

5.

Remove the generator upper bolt, using power tools.

6.

Disconnect the generator harness connectors.

7.

Remove the generator.

Installation

Installation is in the reverse order of removal.
• Install the generator and check the tension of the drive belt. Refer to 

EM-13, "Tension Adjustment"

.

CAUTION:

Tighten terminal "1" nut carefully.

• For this model, the power generation variable voltage control system that controls the power generation volt-

age of the generator has been adopted. Therefore, the power generation variable voltage control system
inspection should be performed after replacing the generator in order to ensure that the system operates
normally. 

VK56DE MODELS

1.

Generator

2.

Engine block

3.

Generator stay

WKIA3191E

Terminal "1" nut

: 10.8 N·m (1.1 kg-m, 8 ft-lb)

CHG-22

< ON-VEHICLE REPAIR >

GENERATOR

Removal

1.

Disconnect the negative battery terminal.

2.

Remove the air dam using power tool.

3.

Remove the engine undercover using power tool.

4.

Remove the fan shroud. 

5.

Remove the drive belt. Refer to 

EM-153, "Removal and Installation"

.

6.

Remove the lower bracket, using power tools. 

7.

Remove the generator upper bolt, using power tools.

8.

Disconnect the generator harness connectors.

9.

Remove the generator.

Installation

Installation is in the reverse order of removal.
• Install the generator and check the tension of the drive belt. Refer to 

EM-153, "Checking Drive Belts"

.

CAUTION:

Tighten terminal "1" nut carefully.

• For this model, the power generation variable voltage control system that controls the power generation volt-

age of the generator has been adopted. Therefore, the power generation variable voltage control system
inspection should be performed after replacing the generator in order to ensure that the system operates
normally. 

GENERATOR PULLEY INSPECTION

Perform the following.
• Make sure that the generator pulley does not rattle.
• Make sure that the generator pulley nut is properly tightened.

WKIA1390E

Terminal "1" nut

: 10.8 N·m (1.1 kg-m, 8 ft-lb)

Generator pulley nut

: 118 N·m (12.0 kg-m, 87 ft-lb)

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SERVICE DATA AND SPECIFICATIONS (SDS)

CHG-23

< SERVICE DATA AND SPECIFICATIONS (SDS) 

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SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

Generator

INFOID:0000000001281941

Type

LR1130-701

Valeo

Engine

VQ40DE/VK56DE

Nominal rating

12V-130A

Ground polarity

Negative

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

1,200 rpm

Hot output current (When 13.5 volts is applied)

More than 82A/1800rpm

More than 115A/2,500rpm

More than 130A/5,000rpm

Regulated output voltage

14.1 - 14.7V @ 20

°

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Adjustment range of power generation variable 
voltage control 

11.4 - 15.6V

CO-1

ENGINE

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SECTION 

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CONTENTS

ENGINE COOLING SYSTEM

VQ40DE

PRECAUTION ...............................................

3

PRECAUTIONS ...................................................

3

Precaution for Supplemental Restraint System 
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...................................................................

3

Precaution for Liquid Gasket .....................................

3

PREPARATION ............................................

5

PREPARATION ...................................................

5

Special Service Tool  .................................................

5

Commercial Service Tool  ..........................................

5

FUNCTION DIAGNOSIS ...............................

7

COOLING SYSTEM ............................................

7

Cooling Circuit ...........................................................

7

Schematic .................................................................

8

OVERHEATING CAUSE ANALYSIS  ..................

9

Troubleshooting Chart ...............................................

9

ON-VEHICLE MAINTENANCE ....................

11

ENGINE COOLANT  ...........................................

11

System Inspection ...................................................

11

Changing Engine Coolant  .......................................

12

ON-VEHICLE REPAIR .................................

16

RADIATOR .........................................................

16

Components ............................................................

16

Removal and Installation .........................................

16

Checking Radiator ...................................................

18

ENGINE COOLING FAN  ....................................

19

Removal and Installation (Crankshaft driven type) 

....

19

Removal and Installation (Motor driven type) ..........

20

WATER PUMP  ...................................................

22

Removal and Installation  .........................................

22

WATER INLET AND THERMOSTAT ASSEM-
BLY ....................................................................

26

Removal and Installation  .........................................

26

WATER OUTLET AND WATER PIPING  ..........

28

Removal and Installation  .........................................

28

SERVICE DATA AND SPECIFICATIONS 
(SDS) ............................................................

29

SERVICE DATA AND SPECIFICATIONS 
(SDS) .................................................................

29

Standard and Limit  ..................................................

29

VK56DE

PRECAUTION ..............................................

30

PRECAUTIONS .................................................

30

Precaution for Supplemental Restraint System 
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .................................................................

30

Precaution for Liquid Gasket  ...................................

30

PREPARATION ...........................................

32

PREPARATION .................................................

32

Special Service Tool ................................................

32

Commercial Service Tool  ........................................

32

FUNCTION DIAGNOSIS ..............................

34

COOLING SYSTEM  ..........................................

34

Cooling Circuit  .........................................................

34

Schematic ................................................................

35

OVERHEATING CAUSE ANALYSIS ................

36

Troubleshooting Chart  .............................................

36

ON-VEHICLE MAINTENANCE ....................

38

ENGINE COOLANT  ..........................................

38

PRECAUTIONS

CO-3

< PRECAUTION >

[VQ40DE]

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PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT 
PRE-TENSIONER"

INFOID:0000000001315964

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 SR 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 performed by
an authorized NISSAN/INFINITI 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 SR 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 har-
ness connectors.

Precaution for Liquid Gasket

INFOID:0000000001282185

REMOVAL OF LIQUID GASKET SEALING

• After removing nuts and bolts, separate the mating surface, using Tool and remove old liquid gasket sealing.    

CAUTION:

Be careful not to damage the mating surfaces.

• Tap Tool to insert it, and then slide it by tapping on the side as

shown.

• In areas where Tool is difficult to use, use plastic hammer to lightly

tap the parts, to remove it.

CAUTION:

If for some unavoidable reason suitable tool such as screw-
driver is used, be careful not to damage the mating surfaces.

LIQUID GASKET APPLICATION PROCEDURE

1.

Remove the old liquid gasket adhering to the gasket application
surface and the mating surface using suitable tool.
• Remove the liquid gasket completely from the groove of the

liquid gasket application surface, bolts, and bolt holes.

2.

Thoroughly clean the mating surfaces and remove adhering
moisture, grease and foreign material.

Tool number

: KV10111100 (J-37228)

WBIA0566E

PBIC0003E

CO-4

< PRECAUTION >

[VQ40DE]

PRECAUTIONS

3.

Attach the liquid gasket tube to the Tool.

Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-26, "Recommended Chemical Products and Sealants"

. 

4.

Apply the liquid gasket without breaks to the specified location
with the specified dimensions.

• If there is a groove for the liquid gasket application, apply the

liquid gasket to the groove.

• As for the bolt holes, normally apply the liquid gasket inside

the holes. If specified in the procedure, it should also be
applied outside the holes.

• Within five minutes of liquid gasket application, install the mat-

ing component.

• If the liquid gasket protrudes, wipe it off immediately.
• Do not retighten after the installation.
• Wait 30 minutes or more after installation before refilling the

engine with engine oil and engine coolant.

CAUTION:

If there are specific instructions in this manual, observe them.

Tool number

: WS39930000 (

—

)

WBIA0567E

SEM159F

 

 

 

 

 

 

 

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