Infiniti QX56 (JA60). Manual - part 110

BCS

BCM (BODY CONTROL MODULE)

BCS-59

< ON-VEHICLE REPAIR >

[BCM]

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ON-VEHICLE REPAIR

BCM (BODY CONTROL MODULE)

Removal and Installation

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REMOVAL

NOTE:

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

brand-new BCM after installation. Refer to 

WT-6, "ID Registration Procedure"

.

1. Disconnect the battery negative terminal.
2. Remove the lower knee protector. Refer to 

IP-11, "Exploded View"

.

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

INSTALLATION

Installation is in the reverse order of removal.

NOTE:

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

BCS-4, "CONFIGURATION : Special Repair Require-

ment"

.

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

Refer to the CONSULT-III operation manual for the initialization procedure.

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

WT-6,

"ID Registration Procedure"

.

LEIA0068E

BR-1

BRAKES

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SECTION 

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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

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

6

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

6

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

6

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

7

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

7

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

7

BRAKE PAD : Front Pad Inspection .........................

7

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

7

DISC ROTOR : Front Rotor Inspection  .....................

7

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

9

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

9

BRAKE PAD : Rear Pad Inspection ..........................

9

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

9

DISC ROTOR : Rear 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  .........................................................

13

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

13

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

14

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

14

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

15

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

15

Inspection and Adjustment  ......................................

15

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

17

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

17

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

17

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

17

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

19

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

19

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

19

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

21

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

21

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

21

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

22

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

23

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

25

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

25

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

26

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

26

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

28

BR-2

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

28

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

29

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

29

Removal and Installation of Brake Pads .................

29

Brake Burnishing Procedure ...................................

30

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

31

Removal and Installation of Brake Caliper and Ro-
tor ...........................................................................

31

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

34

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

34

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

34

Brake Burnishing Procedure ...................................

35

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

35

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

36

DISASSEMBLY AND ASSEMBLY  .............

37

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

37

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

37

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

39

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

39

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

42

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

42

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

45

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

45

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

45

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

45

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

46

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

46

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

46

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

46

PRECAUTIONS

BR-3

< PRECAUTION >

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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

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

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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.