Nissan Pathfinder (2009 year). Instruction - part 136

CHG-18

< COMPONENT DIAGNOSIS >

CHARGING SYSTEM

ABMIA0012GB

2009 Pathfinder

CHG

CHARGING SYSTEM

CHG-19

< SYMPTOM DIAGNOSIS >

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SYMPTOM DIAGNOSIS

CHARGING SYSTEM

Symptom Table

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Symptom

Reference

Battery discharged

Refer to 

CHG-5, "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.

2009 Pathfinder

CHG-20

< ON-VEHICLE REPAIR >

GENERATOR

ON-VEHICLE REPAIR

GENERATOR

Removal and Installation

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VQ40DE MODELS

Removal

1.

Disconnect the negative battery terminal.

2.

Remove the fan shroud. Refer to 

CO-16, "Exploded View"

.

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, "Checking Drive Belts"

.

CAUTION:

Tighten terminal 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 nut

: 10.8 N·m (1.1 kg-m, 8 ft-lb)

2009 Pathfinder

CHG

GENERATOR

CHG-21

< ON-VEHICLE REPAIR >

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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. Refer to 

CO-45, "Exploded View"

.

5.

Remove the drive belt. Refer to 

EM-155, "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-155, "Checking Drive Belts"

.

CAUTION:

Tighten terminal 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.

1.

Generator

2.

Lower bracket

AWBIA0701GB

Terminal 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)

2009 Pathfinder

CHG-22

< SERVICE DATA AND SPECIFICATIONS (SDS) 

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

Generator

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Type

TG15S147

Valeo

Engine

VQ40DE/VK56DE

Nominal rating

14V-130A

Ground polarity

Negative

Minimum revolution under no-load

1,200 rpm

Hot output current (When 13.5 volts is applied)

More than 52A/1,500 rpm
More than 82A/1,800 rpm

More than 115A/2,500 rpm

More than 130A/5,000 rpm

Regulated output voltage

13.5V @ 5,000 rpm @ 20

°

C

Adjustment range of power generation variable 
voltage control 

11.4 - 15.6V

2009 Pathfinder

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 Necessary for Steering Wheel Rota-
tion After Battery Disconnect .....................................

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

Exploded View  ........................................................

16

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

16

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

18

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

19

Exploded View  ........................................................

19

Removal and Installation (Crankshaft driven type) 

....

19

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

20

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

22

Exploded View .........................................................

22

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

22

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

27

Exploded View .........................................................

27

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

27

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

29

Exploded View .........................................................

29

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

29

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

31

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

31

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

31

VK56DE

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

32

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

32

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

32

Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect  ...................................

32

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

32

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

34

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

34

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

34

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

34

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

36

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

36

2009 Pathfinder

CO-2

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

36

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

37

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

38

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

38

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

40

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

40

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

40

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

41

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

45

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

45

Exploded View  ........................................................

45

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

45

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

47

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

49

Exploded View  ........................................................

49

Removal and Installation (Crankshaft Driven 
Type) .......................................................................

49

Removal and Installation (Motor Driven Type) ........

50

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

52

Exploded View  ........................................................

52

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

52

THERMOSTAT AND WATER PIPING  ..............

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Exploded View  ........................................................

54

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

54

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

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

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

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2009 Pathfinder

PRECAUTIONS

CO-3

< PRECAUTION >

[VQ40DE]

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PRECAUTION

PRECAUTIONS

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

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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

Instruction. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.

Precaution Necessary for Steering Wheel Rotation After Battery Disconnect

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NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-

TEM).

• Remove and install all control units after disconnecting both battery cables with the ignition knob in the

″

LOCK

″

 position.

• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.

If DTC is detected, perform trouble diagnosis according to self-diagnostic results.

For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.

OPERATION PROCEDURE

1.

Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.

2.

Use the Intelligent Key or mechanical key to turn the ignition switch to the 

″

ACC

″

 position. At this time, the

steering lock will be released.

3.

Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.

4.

Perform the necessary repair operation.

5.

When the repair work is completed, return the ignition switch to the 

″

LOCK

″

 position before connecting

the battery cables. (At this time, the steering lock mechanism will engage.)

6.

Perform a self-diagnosis check of all control units using CONSULT-III. 

Precaution for Liquid Gasket

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REMOVAL OF LIQUID GASKET SEALING

2009 Pathfinder