Infiniti G37 Coupe. Manual - part 256

 

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Infiniti G37 Coupe. Manual - part 256

 

 

BR-62

< ON-VEHICLE REPAIR >

REAR DISC BRAKE

2.

Apply rubber grease to piston boots (1). Cover the piston (2) end
with piston boots, and then install caliper side lip on piston boot
securely into a groove on caliper.

CAUTION:

Never reuse piston boots.

3.

Apply brake fluid to piston. Push piston into caliper by hand and
push piston boot piston-side lip into the piston groove.

CAUTION:

Press the piston evenly and vary the pressing point to pre-
vent caliper inner wall from being rubbed.

4.

Install the caliper to tighten the caliper mounting bolts to the
specified torque.

BRAKE CALIPER ASSEMBLY (2 PISTON TYPE) : Inspection and Adjustment

INFOID:0000000001664898

INSPECTION AFTER DISASSEMBLY

Caliper

Check the inner wall of the caliper for rust, wear, cracks or damage. Replace the caliper if any abnormal con-
dition is detected.

CAUTION:

Always clean with new brake fluid. Never clean with mineral oil such as gasoline and light oil.

Pistons

Check the surface of the piston for rust, wear, cracks or damage. Replace the piston if any abnormal condition
is detected.

CAUTION:

A piston sliding surface is plated. Never polish with sandpaper.

ADJUSTMENT AFTER INSTALLATION

Brake Burnishing Procedure

Burnish contact surfaces between disc rotors and pads according to following procedure after refinishing or
replacing disc rotor, or if a soft pedal occurs at very low mileage.

CAUTION:

• Be careful of vehicle speed because the brake does not operate easily until pad and disc rotor are

securely fitted.

• Only perform this procedure under safe road and traffic conditions. Use extreme caution.
1.

Drive vehicle on straight, flat road.

2.

Depress brake pedal with the power to stop vehicle within 3 to 5 seconds until the vehicle stops.

3.

Drive without depressing brake for a few minutes to cool the brake.

4.

Repeat steps 1 to 3 until pad and disc rotor are securely fitted.

PFIA0906J

SERVICE DATA AND SPECIFICATIONS (SDS)

BR-63

< SERVICE DATA AND SPECIFICATIONS (SDS) 

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SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

General Specifications

INFOID:0000000001647892

FRONT AND REAR CALIPER 1 PISTON TYPE

Unit: mm (in)

FRONT CALIPER 4 PISTON, REAR CALIPER 2 PISTON TYPE

Unit: mm (in)

Brake Pedal

INFOID:0000000001647893

Unit: mm (in)

Brake Booster

INFOID:0000000001647894

Vacuum type

Unit: mm (in)

Front brake

Cylinder bore diameter

57.15 (2.250)

Pad length 

×

 width 

×

 thickness

116.1 

×

 51.7 

×

 10.3 (4.57 

×

 2.035 

×

 0.406)

Rotor outer diameter 

×

 thickness

330 

×

 32.0 (12.99 

×

 1.260)

Rear brake 

Cylinder bore diameter

38.1 (1.500)

Pad length 

×

 width 

×

 thickness

83.0 

×

 33.0 

×

 8.5 (3.268 

×

 1.299 

×

 0.335)

Rotor outer diameter 

×

 thickness

330 

×

 16.0 (12.99 

×

 0.630)

Master cylinder

Cylinder bore diameter

23.8 (15/16)

Control valve

Valve type

Electric brake force distribution

Brake booster

Diaphragm diameter

Primary: 230 (9)

Secondary: 205 (8) 

Recommended brake fluid

DOT 3

Front brake

Cylinder bore diameter

41.3 (1.626) 

×

 2 + 44.45 (1.750) 

×

 2

Pad length 

×

 width 

×

 thickness

123.2 

×

 55.0 

×

 11.0 (4.85 

×

 2.165 

×

 0.433)

Rotor outer diameter 

×

 thickness

355 

×

 32.0 (13.98 

×

 1.260)

Rear brake 

Cylinder bore diameter

41.3 (1.626) 

×

 2

Pad length 

×

 width 

×

 thickness

95.8 

×

 41.5 

×

 9.5 (3.772 

×

 1.634 

×

 0.374)

Rotor outer diameter 

×

 thickness

350 

×

 20.0 (13.78 

×

 0.787)

Master cylinder

Cylinder bore diameter

25.4 (1)

Control valve

Valve type

Electric brake force distribution

Brake booster

Diaphragm diameter

Primary: 230 (9)

Secondary: 205 (8)

Recommended brake fluid

DOT 3

Brake pedal height (H

1

)

171.5 – 181.5 (6.75 – 7.15)

Clearance (C

1

) between ASCD brake switch threaded end and the stopper rubber

0 – 0.6 (0 – 0.024)

Clearance (C

2

) between the stop lamp switch threaded end and the stopper rubber

0.74 – 1.96 (0.0291 – 0.0772)

Brake pedal play (A)

2.0 – 8.0 (0.079 – 0.315)

Brake pedal shaky fitting (B)

0 – 1.4 (0.0 – 0.055)

Depressed brake pedal height (H

2

)

[Depressing 490 N (50 kg, 110 lb) while turning the engine ON]

124.0 (4.88) or more 

Input rod length (B)

128.0 (5.04)

BR-64

< SERVICE DATA AND SPECIFICATIONS (SDS) 

SERVICE DATA AND SPECIFICATIONS (SDS)

Front Disc Brake

INFOID:0000000001647895

1 PISTON TYPE

Unit: mm (in)

4 PISTON TYPE

Unit: mm (in)

Rear Disc Brake

INFOID:0000000001647896

1 PISTON TYPE

Unit: mm (in)

2 PISTON TYPE

Unit: mm (in)

Brake pad

Standard thickness

10.3 (0.406)

Wear limit thickness

2.0 (0.079)

Disc rotor

Standard thickness 

32.0 (1.260)

Wear limit thickness

30.0 (1.181)

Thickness variation (measured at 8 positions)

0.015 (0.0006)

Runout limit (with it attached to the vehicle)

0.035 (0.0014)

Brake pad

Standard thickness

11.0 (0.433)

Wear limit thickness

2.0 (0.079)

Disc rotor

Standard thickness 

32.0 (1.260)

Wear limit thickness

30.0 (1.181)

Thickness variation (measured at 8 positions)

0.015 (0.0006)

Runout limit (with it attached to the vehicle)

0.035 (0.0014) 

Brake pad

Standard thickness 

8.5 (0.335)

Wear limit thickness

2.0 (0.079)

Disc rotor

Standard thickness 

16.0 (0.631)

Wear limit thickness

15.0 (0.591)

Thickness variation (measured at 8 positions)

0.015 (0.0006) 

Runout limit (with it attached to the vehicle)

0.055 (0.0022) 

Brake pad

Standard thickness 

8.5 (0.335)

Wear limit thickness

2.0 (0.079)

Disc rotor

Standard thickness 

20.0 (0.787)

Wear limit thickness

18.0 (0.709)

Thickness variation (measured at 8 positions)

0.015 (0.0006) 

Runout limit (with it attached to the vehicle)

0.055 (0.0022) 

BRC-1

BRAKES

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CONTENTS

BRAKE CONTROL SYSTEM

VDC/TCS/ABS

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

4

DIAGNOSIS AND REPAIR WORKFLOW  ..........

4

Work Flow  .................................................................

4

Diagnostic Work Sheet ..............................................

7

INSPECTION AND ADJUSTMENT .....................

8

ADDITIONAL SERVICE WHEN REPLACING 
CONTROL UNIT  ........................................................
..

8

ADDITIONAL SERVICE WHEN REPLACING 
CONTROL UNIT : Description  ................................
..

8

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

8

ADJUSTMENT OF STEERING ANGLE SENSOR 
NEUTRAL POSITION  ................................................
..

8

ADJUSTMENT OF STEERING ANGLE SENSOR 
NEUTRAL POSITION : Description  ........................
..

8

ADJUSTMENT OF STEERING ANGLE SENSOR 
NEUTRAL POSITION : Special Repair Require-
ment ........................................................................
..

8

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

10

VDC ....................................................................

10

System Diagram ......................................................

10

System Description  .................................................

10

Component Parts Location ......................................

11

Component Description ...........................................

13

TCS .....................................................................

14

System Diagram ......................................................

14

System Description  .................................................

14

Component Parts Location ......................................

15

Component Description ...........................................

17

ABS ....................................................................

18

System Diagram ......................................................

18

System Description  .................................................

18

Component Parts Location  ......................................

19

Component Description  ...........................................

21

EBD ...................................................................

22

System Diagram  ......................................................

22

System Description ..................................................

22

Component Parts Location  ......................................

23

Component Description  ...........................................

25

DIAGNOSIS SYSTEM [ABS ACTUATOR 
AND ELECTRIC UNIT (CONTROL UNIT)]  .......

26

CONSULT-III Function  ............................................

26

COMPONENT DIAGNOSIS .........................

31

C1101, C1102, C1103, C1104 WHEEL SEN-
SOR-1 ................................................................

31

Description ...............................................................

31

DTC Logic ................................................................

31

Diagnosis Procedure  ...............................................

31

Component Inspection .............................................

33

Special Repair Requirement ....................................

33

C1105, C1106, C1107, C1108 WHEEL SEN-
SOR-2 ................................................................

34

Description ...............................................................

34

DTC Logic ................................................................

34

Diagnosis Procedure  ...............................................

34

Component Inspection .............................................

36

Special Repair Requirement ....................................

36

C1109 POWER AND GROUND SYSTEM  ........

37

Description ...............................................................

37

DTC Logic ................................................................

37

Diagnosis Procedure  ...............................................

37

Special Repair Requirement ....................................

38

C1110, C1153, C1170 ABS ACTUATOR AND 
ELECTRIC UNIT (CONTROL UNIT) .................

39

DTC Logic ................................................................

39

Diagnosis Procedure  ...............................................

39

Special Repair Requirement ....................................

39

 

 

 

 

 

 

 

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