The service items unmentioned on this manual are recommended to be performed by a GT-R certified
NISSAN dealer. Because those service items require special equipment and a GT-R certified technical
staff who completed special training.

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

INFOID:0000000009160089

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 “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.

WARNING:

Always observe the following items for preventing accidental activation.
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in

the event of a collision that 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 “SRS AIR BAG”.

• Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-

vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors.

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

WARNING:

Always observe the following items for preventing accidental activation.
• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the

ignition ON or engine running, never 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.

Precautions Necessary for Steering Wheel Rotation After Battery Disconnection

INFOID:0000000009160090

CAUTION:

Comply with the following cautions to prevent any error and malfunction.
• Before removing and installing any control units, first turn the ignition switch to the LOCK position,

then disconnect both battery cables.

• After finishing work, confirm that all control unit connectors are connected properly, then re-connect

both battery cables.

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

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

For vehicle with steering lock unit, if the battery is disconnected or discharged, the steering wheel will lock and
cannot be turned.
If turning the steering wheel is required with the battery disconnected or discharged, follow the operation pro-
cedure below before starting the repair operation.

OPERATION PROCEDURE

Connect both battery cables.

2014 GT-R

ST-4

< PRECAUTION >

PRECAUTIONS

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

Turn the ignition switch to ACC position.
(At this time, the steering lock will be released.)

Disconnect both battery cables. The steering lock will remain released with both battery cables discon-
nected and the steering wheel can be turned.

Perform the necessary repair operation.

When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the ignition switch from ACC position to ON position, then to LOCK position. (The steering wheel will lock
when the ignition switch is turned to LOCK position.)

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

Precaution for Battery Service

INFOID:0000000009160091

Before disconnecting the battery, lower both the driver and passenger windows. This will prevent any interfer-
ence between the window edge and the vehicle when the door is opened/closed. During normal operation, the
window slightly raises and lowers automatically to prevent any window to vehicle interference. The automatic
window function will not work with the battery disconnected.

Service Notice or Precautions for Steering System

INFOID:0000000009160092

• In case of removing steering gear assembly, make the final tightening with grounded and unloaded vehicle

condition, and then check wheel alignment.

• Observe the following precautions when disassembling.
- Before disassembly, thoroughly clean the outside of the unit.
- Disassembly should be done in a clean work area. It is important to prevent the internal parts from becoming

contaminated by dirt or other foreign matter.

- For easier and proper assembly, place disassembled parts in order on a parts rack.
- Use nylon cloth or paper towels to clean the parts; common shop rags can leave lint that might interfere with

their operation.

- Never reuse non-reusable parts.
- Before assembling, apply the specified grease to the directed parts.

General Precautions

INFOID:0000000009160093

CAUTION:

After finishing servicing, check that all the tools and waste are stored in a customary place.

2014 GT-R

PREPARATION

ST-5

< PREPARATION >

PREPARATION

Special Service Tools

INFOID:0000000009160094

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

Tool number
(Kent-Moore No.)
Tool name

Description

ST3127S000
(J-25765-A)
Preload gauge

Inspecting steering wheel turning torque, pin-
ion rotating torque, and ball joint rotating
torque

ST27180001
(J-25726-A)
Steering wheel puller

Removing steering wheel

ZZA0806D

ZZA0819D

2014 GT-R

ST-6

< PERIODIC MAINTENANCE >

POWER STEERING FLUID

PERIODIC MAINTENANCE

POWER STEERING FLUID

Inspection

INFOID:0000000009160096

FLUID LEVEL

Check fluid level with engine stopped.

Check that fluid level is between MIN and MAX.

CAUTION:

Adjust the fluid level to the R level (B) rather than the fluid
level (A) in sports driving mode or in high road driving
mode.

Fluid levels at HOT and COLD are different. Do not confuse
them.

CAUTION:

• The fluid level must not exceed the MAX line. Excessive fluid causes fluid leakage from the cap.
• Never reuse drained power steering fluid.

FLUID LEAKAGE

Check hydraulic connections for fluid leakage, cracks, damage,
looseness, or wear.

Run the engine until the fluid temperature reaches 50 to 80

(122 to 176

F) in reservoir tank, and keep engine speed idle.

Turn steering wheel several times from full left stop to full right
stop.

Hold steering wheel at each lock position for five seconds and
carefully check for fluid leakage.

CAUTION:

Never hold the steering wheel in a locked position for more
than 10 seconds. (There is the possibility that power steer-
ing oil pump assembly may be damaged.)

If fluid leakage at connections occurs, loosen flare nut and then retighten. Do not overtighten connector as
this can damage O-ring, washer and connector.

If fluid leakage from oil pump occurs, check oil pump. (This work is recommended to be performed by GT-
R certified NISSAN dealer.)

Check steering gear boots for accumulation of fluid leakage from steering gear.

AIR BLEEDING HYDRAULIC SYSTEM

If air bleeding is not completed, the following symptoms can be observed.
• Bubbles are created in reservoir tank.
• Clicking noise can be heard from oil pump.
• Excessive buzzing in the oil pump.

NOTE:
Fluid noise may occur in the steering gear or oil pump. This does not affect performance or durability of the
system.

Turn steering wheel several times from full left stop to full right stop with engine off.

CAUTION:

HOT

: Fluid temperature 50 – 80

C (122 – 176

COLD

: Fluid temperature 0 – 30

C (32 – 86

Recommended fluid

: Refer to

MA-22, "Fluids

and Lubricants"

Fluid capacity

: Refer to

ST-18, "General

Specifications"

NNGIA0026GB

SGIA0506E

2014 GT-R

POWER STEERING FLUID

ST-7

< PERIODIC MAINTENANCE >

Fill reservoir tank with a sufficient amount of fluid so that fluid level is not below the MIN line while
turning steering wheel.

Start the engine and hold steering wheel at each lock position for 3 seconds at idle to check for fluid leak-
age.

Repeat step 2 above several times at approximately 3 seconds intervals.

CAUTION:

Never hold the steering wheel in a locked position for more than 10 seconds. (There is the possi-
bility that oil pump may be damaged.)

Check fluid for bubbles and white contamination.

Stop the engine if bubbles or white contamination exist. Perform step 2 and 3 above after waiting until
bubbles and white contamination disappear.

Stop the engine, and then check fluid level.

2014 GT-R

ST-8

< PERIODIC MAINTENANCE >

STEERING WHEEL

STEERING WHEEL

Inspection

INFOID:0000000009160097

STEERING WHEEL AXIAL END PLAY

Check installation conditions of steering gear assembly, front suspension assembly, axle and steering col-
umn assembly.

Check if movement exists when steering wheel is moved up and down, to the left and right and to the axial
direction.

Check the following items if steering wheel axial end play is out of the standard.
• Check the steering column assembly mounting condition. Refer to

ST-11, "Exploded View"

• Check steering gear assembly mounting condition for looseness. Refer to

ST-13, "Exploded View"

STEERING WHEEL PLAY

Turn steering wheel so that front wheels come to the straight-ahead position.

Start the engine and lightly turn steering wheel to the left and right until front wheels start to move.

Measure steering wheel movement on the outer circumference.

Check the following items if steering wheel play is out of the standard.
• Check backlash for each joint of steering column assembly.
• Check installation condition of steering gear assembly.

NEUTRAL POSITION STEERING WHEEL

Check that steering gear assembly, steering column assembly and steering wheel are installed in the cor-
rect position.

Perform neutral position inspection after wheel alignment. Refer to

FSU-7, "Inspection"

Set the vehicle to the straight-ahead position and check that the steering wheel is in the neutral position.

Loosen outer socket lock nut and turn inner socket to left and right equally to make fine adjustments if
steering wheel is not in the neutral position.

STEERING WHEEL TURNING TORQUE

Park the vehicle on a level and dry surface, apply parking brake.

Tires need to be inflated to the specified pressure. Refer to

WT-13, "Tire"

Remove driver air bag module. Refer to

SR-11, "Exploded View"

Start the engine.

Check that the power steering fluid is at the operating temperature.

Steering wheel axial end
play

: Refer to

ST-18, "Steering

Wheel Axial End Play and
Play"

Steering wheel play

: Refer to

ST-18, "Steering

Wheel Axial End Play and
Play"

Fluid temperature

: 50 – 80

C (122 – 176

2014 GT-R

STEERING WHEEL

ST-9

< PERIODIC MAINTENANCE >

Make sure that the reading is within the following specified
range using preload gauge (A) [SST: ST3127S000 (J-25765-A)].

If steering wheel turning force is out of the specification, check
rack sliding force and relief hydraulic pressure of oil pump.
Regarding relief hydraulic pressure of oil pump.

FRONT WHEEL TURNING ANGLE

Check front wheel turning angle after toe-in inspection. Refer to

FSU-7, "Inspection"

Place front wheels on turning radius gauges and rear wheels on
stands, so that vehicle can be level.

Check the maximum inner and outer wheel turning angles for LH
and RH road wheels.

With the engine at idle, turn steering wheel from full left stop to
full right stop and measure the turning angles.

Steering wheel turning
torque

: Refer to

ST-18, "Steering

Wheel Turning Torque"

JSGIA0431ZZ

FAA0016D

Inner wheel (Angle: A)

: Refer to

ST-18, "EXCEPT TRACK PACK-SPECIFIC

SUSPENSION : Steering Angle"

(Except track pack-

specific suspension),

ST-18, "TRACK PACK-SPE-

CIFIC SUSPENSION : Steering Angle"

(Track pack-

specific suspension).

Outer wheel (Angle: B)

: Refer to

ST-18, "EXCEPT TRACK PACK-SPECIFIC

SUSPENSION : Steering Angle"

(Except track pack-

specific suspension),

ST-18, "TRACK PACK-SPE-

CIFIC SUSPENSION : Steering Angle"

(Track pack-

specific suspension).

SGIA0055E

2014 GT-R

ST-10

< REMOVAL AND INSTALLATION >

STEERING WHEEL

REMOVAL AND INSTALLATION

STEERING WHEEL

Exploded View

INFOID:0000000009160098

Removal and Installation

INFOID:0000000009160099

REMOVAL

NOTE:
When reconnecting spiral cable, fix cable with a tape so that fixing case and rotating part keep aligned. This
omits neutral position alignment procedure during spiral cable installation.
1.

Set the vehicle to the straight-ahead position.

Remove driver air bag module. Refer to

SR-11, "Exploded View"

Remove steering wheel lock nut after steering is locked.

Remove steering wheel with the steering wheel puller (A) [SST:
ST27180001 (J-25726-A)].
NOTE:
Put paint marks on the steering wheel and the column shaft
head for supporting accurate positioning during the installation
procedure.

INSTALLATION

Note the following, and install in the reverse order of removal.

CAUTION:

Never twist spiral cable freely on excessively after it becomes tight (doing so may cause the cable to
tear off).
NOTE:
Check the spiral cable neutral position after replacing or rotating spiral cable. Refer to

SR-14, "Removal and

Installation"

• Never reuse steering wheel lock nut.

Steering wheel

Refer to

GI-4, "Components"

for symbols in the figure.

JSGIA0705GB

NNGIA0005ZZ

2014 GT-R