Nissan Pathfinder (2012 year). Manual - part 84

BCS-52

< PRECAUTION >

PRECAUTIONS

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. 

August 2012

2012 Pathfinder

BCS

BCM (BODY CONTROL MODULE)

BCS-53

< REMOVAL AND INSTALLATION >

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

REMOVAL AND INSTALLATION

BCM (BODY CONTROL MODULE)

Removal and Installation

INFOID:0000000007354953

REMOVAL

NOTE:

If possible, before removing BCM, retrieve current BCM configuration to use for reference when configuring

brand-new BCM after installation. Refer to 

BCS-3, "ADDITIONAL SERVICE WHEN REPLACING CONTROL

UNIT (BCM) : Work Procedure"

.

1. Disconnect the battery negative terminal.
2. Remove the instrument lower panel LH. Refer to 

IP-20, "Removal and Installation"

.

3. Remove the BCM screws and release the BCM.
4. Disconnect the BCM connectors and then remove the BCM.

INSTALLATION

Installation is in the reverse order of removal.

• When replacing the BCM, it must be configured. Refer to 

BCS-4, "CONFIGURATION (BCM) : Work Proce-

dure"

.

• When replacing the BCM, perform initialization of NATS system and registration of all NATS ignition key IDs.

Refer to 

SEC-10

.

• When replacing the BCM, perform ID registration procedure of low tire pressure warning system. Refer to

WT-6, "ID Registration Procedure"

.

• When replacing the BCM, register the remote keyless entry system keyfob ID codes. Refer to 

DLK-10,

"ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement"

.

• When replacing the BCM, perform adjustment procedure for the steering angle sensor. Refer to 

BRC-121,

"ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Special Repair Requirement"

.

LKIA0564E

August 2012

2012 Pathfinder

BR-1

BRAKES

C

D

E

G

H

I

J

K

L

M

SECTION 

BR

A

B

BR

N

O

P

CONTENTS

BRAKE SYSTEM

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 Brake System  ....................................

4

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

5

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

5

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

5

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

5

SYSTEM DESCRIPTION  ..............................

6

NOISE, VIBRATION, AND HARSHNESS 
(NVH) TROUBLESHOOTING  .............................

6

NVH Troubleshooting Chart  ......................................

6

BASIC INSPECTION  ....................................

7

FRONT DISC BRAKE .........................................

7

BRAKE PAD ................................................................

7

BRAKE PAD : Inspection  ..........................................

7

DISC ROTOR ...............................................................

7

DISC ROTOR : Inspection  ........................................

7

REAR DISC BRAKE ...........................................

9

BRAKE PAD ................................................................

9

BRAKE PAD : Inspection  ..........................................

9

DISC ROTOR ...............................................................

9

DISC ROTOR : Inspection  ........................................

9

BRAKE BOOSTER  ............................................

10

Inspection ................................................................

10

VACUUM LINES .................................................

11

Inspection ................................................................

11

BRAKE MASTER CYLINDER  ..........................

12

On Board Inspection ................................................

12

BRAKE TUBE AND HOSE  ...............................

13

Hydraulic Circuit  ......................................................

13

FRONT BRAKE  .........................................................

15

FRONT BRAKE : Inspection ....................................

15

REAR BRAKE ............................................................

16

REAR BRAKE : Inspection  ......................................

16

PERIODIC MAINTENANCE  ........................

17

BRAKE PEDAL .................................................

17

Inspection and Adjustment - Standard Pedal  ..........

17

Inspection and Adjustment - Adjustable Pedal  ........

18

BRAKE FLUID  ..................................................

20

On Board Inspection ................................................

20

Drain and Refill  ........................................................

20

Bleeding Brake System  ...........................................

20

REMOVAL AND INSTALLATION ...............

22

BRAKE PEDAL .................................................

22

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

22

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

23

BRAKE TUBE AND HOSE  ...............................

26

Hydraulic Circuit  ......................................................

26

Removal and Installation of Front Brake Piping 
and Brake Hose .......................................................

28

Removal and Installation of Rear Brake Piping 
and Brake Hose .......................................................

29

Inspection After Installation  .....................................

30

BRAKE MASTER CYLINDER  ..........................

32

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

32

BRAKE BOOSTER  ...........................................

35

August 2012

2012 Pathfinder

BR-2

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

35

VACUUM LINES  ................................................

38

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

38

FRONT DISC BRAKE ........................................

39

Exploded View of Brake Pads  ................................

39

Removal and Installation of Brake Pad  ..................

40

Brake Burnishing  ....................................................

41

Exploded View of Brake Caliper  .............................

42

Removal and Installation of Brake Caliper and 
Disc Rotor ...............................................................

42

REAR DISC BRAKE ..........................................

45

Exploded View of Brake Pad  ..................................

45

Removal and Installation of Brake Pad  ..................

45

Brake Burnishing  ....................................................

46

Exploded View of Brake Caliper  .............................

47

Removal and Installation of Brake Caliper and 
Disc Rotor ...............................................................

47

UNIT DISASSEMBLY AND ASSEMBLY ....

50

BRAKE MASTER CYLINDER ...........................

50

Disassembly and Assembly  ....................................

50

FRONT DISC BRAKE  .......................................

53

Exploded View of Brake Caliper  .............................

53

Disassembly and Assembly  ....................................

53

REAR DISC BRAKE ..........................................

56

Exploded View of Brake Caliper  .............................

56

Disassembly and Assembly  ....................................

56

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

59

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

59

General Specification ..............................................

59

Brake Pedal  ............................................................

59

Brake Booster  .........................................................

60

Check Valve ............................................................

60

Front Disc Brake  .....................................................

61

Rear Disc Brake ......................................................

61

August 2012

2012 Pathfinder

PRECAUTIONS

BR-3

< PRECAUTION >

C

D

E

G

H

I

J

K

L

M

A

B

BR

N

O

P

PRECAUTION

PRECAUTIONS

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

INFOID:0000000007356596

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.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-

tion ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s) with a

hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing

serious injury.

• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the

battery, and wait at least 3 minutes before performing any service.

Precaution Necessary for Steering Wheel Rotation After Battery Disconnect

INFOID:0000000007356597

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 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.

August 2012

2012 Pathfinder

BR-4

< PRECAUTION >

PRECAUTIONS

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. 

Precaution for Brake System

INFOID:0000000007356598

• Recommended fluid is Genuine NISSAN Super Heavy Duty Brake Fluid or equivalent. Refer to 

MA-18,

"FOR USA AND CANADA : Fluids and Lubricants"

 (United States and Canada), 

MA-20, "FOR MEXICO :

Fluids and Lubricants"

 (Mexico).

• Do not reuse drained brake fluid.

• Be careful not to splash brake fluid on painted areas.

• To clean or wash all parts of master cylinder, disc brake caliper and wheel cylinder, use clean brake fluid.

• Do not use mineral oils such as gasoline or kerosene. They will ruin rubber parts of the hydraulic system.

• Use flare nut wrench when removing and installing brake tube.

• Always check tightening torque when installing brake lines.

• Before working, turn ignition switch to OFF and disconnect con-

nectors for ABS actuator and electric unit (control unit) or battery

negative terminal.

• Burnish the brake contact surfaces after refinishing or replacing

drums or rotors, after replacing pads or linings, or if a soft pedal

occurs at very low mileage.

Refer to 

BR-41, "Brake Burnishing"

.

WARNING:

• Clean dust on caliper and brake pads with a vacuum dust col-

lector to minimize the hazard of airborne particles or other

materials.

SBR686C

August 2012

2012 Pathfinder

PREPARATION

BR-5

< PREPARATION >

C

D

E

G

H

I

J

K

L

M

A

B

BR

N

O

P

PREPARATION

PREPARATION

Special Service Tool

INFOID:0000000007356600

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

Commercial Service Tool

INFOID:0000000007356601

Tool number
(Kent-Moore No.)
Tool name

Description

—

(J-46532)
Brake and clutch pedal height measure-
ment tool

Measuring brake pedal height

38-PFM90.5
( — )
Pro-Cut PFM 90 On-Car Brake Lathe

Turning rotors

LFIA0227E

ALFIA0092ZZ

Tool name

Description

1. Flare nut crowfoot
2. Torque wrench

Removing and installing brake piping

a: 10 mm (0.39 in) / 12 mm (0.47 in)

Power tool

Loosening nuts, screws and bolts

S-NT360

PIIB1407E

August 2012

2012 Pathfinder

BR-6

< SYSTEM DESCRIPTION >

NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING

SYSTEM DESCRIPTION

NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING

NVH Troubleshooting Chart

INFOID:0000000007356602

Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.

×

: Applicable

Reference page

BR-40

, 

BR-45

BR-40

, 

BR-45

BR-40

, 

BR-45

BR-42

, 

BR-47

BR-42

, 

BR-47

BR-42

, 

BR-47

BR-42

, 

BR-47

BR-42

, 

BR-47

BR-42

, 

BR-47

BR-42

, 

BR-47

DL

N-31

7,

 "NVH T

rou

bl

es

ho

ot

in

g Cha

rt

"

 (2F

13

10),

 

DLN-3

27

, "NVH T

roub

le

sh

oo

tin

g 

Ch

art

"

 (2

S1

33

0),

DL

N-33

8, 

"NVH T

ro

ubl

es

ho

ot

ing

 Cha

rt"

 (2S1

35

0)

DL

N-35

0,

 "NVH T

rou

bl

es

ho

ot

in

g Cha

rt

"

 (R18

0A),

 

DL

N-38

5,

 "NVH T

rou

bl

es

ho

ot

in

g Cha

rt

"

 (M

20

5)

DLN-41

8,

 "NVH T

ro

ub

les

ho

ot

in

g Ch

art"

 (R20

0), 

DL

N-45

5, 

"NVH T

ro

ub

les

ho

ot

ing

 Ch

art"

 (R

23

0)

F

AX-5,

 "NVH T

rou

bl

es

ho

ot

in

g Cha

rt

"

 (F

AX

), 

RAX-5

, "NVH T

rou

ble

sh

oo

tin

g Chart

"

 (RAX)

FSU-6

, "NVH T

rou

ble

sh

oo

tin

g Chart

"

 (FSU),

 

RSU-5,

 "NVH T

ro

ub

les

ho

ot

ing

 Ch

art"

 (RSU)

WT

-4

8,

 "NVH T

rou

bl

es

ho

ot

in

g Cha

rt"

ST

-1

1,

 "NVH T

ro

u

bl

es

ho

ot

in

g Ch

art

"

Possible cause and
SUSPECTED PARTS

Pad

s - 

da

ma

ge

d

Pad

s 

- un

ev

en

 wea

r

Shi

m

s da

ma

ge

d

Roto

r im

ba

la

nc

e

Roto

r da

ma

ge

Rotor runout

Roto

r de

fo

rma

tio

n

Roto

r de

fle

ctio

n

Rotor rust

Roto

r th

ic

kn

es

s 

va

riat

ion

PROP

ELLER SHAFT

FRON

T FINA

L DRIVE

REAR FINA

L DRIVE

DR

IVESHAFT

 

SUSPENSION

TIRES 

AND ROA

D

 WHEEL

STEERING

Symptom

Noise

×

×

×

×

×

×

×

×

×

×

Shake

×

×

×

×

×

×

Shimmy, Shudder

×

×

×

×

×

×

×

×

×

×

×

August 2012

2012 Pathfinder