Nissan GT-R (2007-2014 year). ENGINE COOLING SYSTEM / DEFOGGER. Service Manual

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:0000000009160407

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.

General Precautions

INFOID:0000000009160408

CAUTION:

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

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PREPARATION

CO-3

< PREPARATION >

PREPARATION

Commercial Service Tools

INFOID:0000000009160409

Tool name

Description

Power tool

Loosening bolts and nuts

Radiator cap tester

Checking radiator and reservoir tank cap

Radiator cap tester adapter

Adapting radiator cap tester to reservoir tank
cap and water outlet (front) filler neck
a: 28 (1.10) dia.
b: 31.4 (1.236) dia.
c: 41.3 (1.626) dia.
Unit: mm (in)

PBIC0190E

PBIC1982E

S-NT564

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CO-4

< PERIODIC MAINTENANCE >

ENGINE COOLANT

PERIODIC MAINTENANCE

ENGINE COOLANT

Inspection

INFOID:0000000009160410

BASIC INSPECTION

Checking Engine Room

• Visually check engine room for smears*

and leakage*

of engine coolant when engine is cool.

NOTE:
• *

: Engine coolant does not drop.

• *

: Engine coolant drop.

- Check engine assembly and cooling system for smears and leakage of engine coolant.
- Observe the clearance between the engine and radiator to check that there is no engine coolant collected on

the front under cover.

Additional Inspection

• Check that engine coolant temperature history is not stored in ECM. (This work is recommended to be per-

formed by GT-R certified NISSAN dealer.)

• Perform this additional inspection after driving under conditions listed below:
- Higher-RPM (approaching redline) operation
- Frequent high pedal force braking from moderate and higher speeds
- Frequent throttle activation
- Fast revving throughout the RPM range

Remove front under cover. Refer to

EXT-37, "FRONT UNDER COVER : Exploded View"

Visually check the bottom of the engine for smears and leakage of engine coolant.

LEVEL

• Check that the reservoir tank engine coolant level is at the mid-

point between the “MIN” (B) to “MAX” (A) with the engine cold.

CAUTION:

• If engine coolant level exceeds the MAX line, leakage of

engine coolant may occur during the rise in internal pres-
sure in the engine coolant path. Therefore, thoroughly
check that engine coolant level is below the MAX line.

• Refill Genuine NISSAN Long Life Antifreeze/Coolant (blue)

or equivalent in its quality mixed with water (distilled or
demineralized). Refer to

MA-22, "Fluids and Lubricants"

• Adjust the engine coolant level if necessary.
• Check that the reservoir tank cap is tightened.

LEAKAGE

Engine Assembly

Visually check engine assembly and surround area for smears of engine coolant.

Wipe out smeared engine coolant using part cleaner or the equivalent.

Check again for engine coolant smears.

Radiator and Cooling System

NNBIA0235ZZ

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ENGINE COOLANT

CO-5

< PERIODIC MAINTENANCE >

• To check for leakage, apply pressure to the cooling system with the

radiator cap tester (commercial service tool) (A) and radiator cap
tester adapter (commercial service tool) (B).

WARNING:

Never remove radiator cap and reservoir tank cap when
engine is hot. Serious burns could occur from high-pressure
engine coolant escaping from engine cooling system.

CAUTION:

Higher test pressure than that specified may cause radiator
damage.
NOTE:
In a case that engine coolant decreases, fill radiator with engine coolant.

• If anything is found, repair or replace damaged parts.

Draining

INFOID:0000000009160411

WARNING:

• Never change engine coolant when the engine is hot to avoid being scalded.
• Wrap a thick cloth around reservoir tank cap and carefully remove reservoir tank cap. First, turn res-

ervoir tank cap a quarter of a turn to release built-up pressure. Then turn reservoir tank cap all the
way.

Remove engine undercover. Refer to

EXT-35, "ENGINE UNDER COVER : Exploded View"

Open radiator drain plug (1) at the bottom of radiator, and then
remove reservoir tank cap.

Remove reservoir tank if necessary, drain engine coolant, and clean reservoir tank before installing.

Check drained engine coolant for contaminants such as rust, corrosion or discoloration.
If contaminated, flush the engine cooling system. Refer to

CO-6, "Flushing"

Refilling

INFOID:0000000009160412

CAUTION:

• Do not reuse O-rings.
• Do not put additive such as waterleak preventive, since it may cause cooling waterway clogging.
• When refilling use Genuine NISSAN Long Life Antifreeze/Coolant (blue) or equivalent in its quality

mixed with water (distilled or demineralized). Refer to

MA-22, "Fluids and Lubricants"

Install reservoir tank if removed.

Install radiator drain plug.

CAUTION:

Be sure to clean drain plug and install with new O-ring.

Check that each hose clamp has been firmly tightened.

Testing pressure

: Refer to

CO-10, "Radiator"

PBIC5121J

: Vehicle front

NNBIA0164ZZ

Tightening torque

: 1.2 N·m (0.12 kg-m, 11 in-lb)

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CO-6

< PERIODIC MAINTENANCE >

ENGINE COOLANT

Fill radiator to specified level.
• Pour engine coolant through engine coolant filler neck

slowly of less than 2 (2-1/8 US qt, 1-3/4 lmp qt) a minute
to allow air in system to escape.

Install radiator cap.

Fill reservoir tank to “MAX” level line with engine coolant if nec-
essary.

Install reservoir tank cap, and then start the engine.

Warm up engine until thermostat opens. Standard for warming-up time is approximately 10 minutes at
3,000 rpm.
• Check thermostat opening condition by touching radiator hose (lower) to see a flow of warm water.

CAUTION:

Watch water temperature gauge so as not to overheat engine.

Stop the engine and cool down to less than approximately 50

C (122

F).

• Cool down using fan to reduce the time.
• If necessary, refill radiator up to filler neck with engine coolant.

10. Repeat steps 6 through 9 two or more times with radiator cap and reservoir tank cap installed until engine

coolant level no longer drops.

11. When the coolant level of the radiator stops lowering, refill reser-

voir tank to the midpoint between the “MIN” (B) and “MAX” (A) of
the reservoir tank.

12. Check cooling system for leakage with engine running.
13. Warm up the engine, and check for sound of engine coolant flow while running engine from idle up to

3,000 rpm with heater temperature controller set at several positions between “COOL” and “WARM”.
• Sound may be noticeable at heater unit.

14. Repeat step 13 three times.

15. If sound is heard, bleed air from cooling system by repeating steps from 3 to 13 until engine coolant level

no longer drops.

16. Recheck reservoir tank engine coolant level with the engine completely cold. Refer to

CO-4, "Inspection"

Flushing

INFOID:0000000009160413

Install reservoir tank if removed, and radiator drain plug.

Engine coolant capacity

: Refer to

CO-10,

"Periodical Maintenanc
e Specification"

(With reservoir tank at
“MAX” level)

JPBIA0412ZZ

: MAX

: MIN

Reservoir tank engine cool-
ant capacity

: Refer to

CO-10,

"Periodical Maintenanc
e Specification"

(At “MAX” level)

JPBIA0102ZZ

NNBIA0235ZZ

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ENGINE COOLANT

CO-7

< PERIODIC MAINTENANCE >

CAUTION:

Be sure to clean drain plug and install with new O-ring.

Fill radiator and reservoir tank with water.

Run the engine and warm it up to normal operating temperature.

Rev the engine two or three times under no-load.

Stop the engine and wait until it cools down.

Drain water from the system. Refer to

CO-5, "Draining"

Repeat steps 1 through 6 until clear water begins to drain from radiator.

Tightening torque

: 1.2 N·m (0.12 kg-m, 11 in-lb)

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CO-8

< PERIODIC MAINTENANCE >

RADIATOR

RADIATOR

RESERVOIR TANK CAP

RESERVOIR TANK CAP : Inspection

INFOID:0000000009160414

• Check valve seat of reservoir tank cap.
- Check if valve seat (A) is swollen to the extent that the edge of the

metal plunger (B) cannot be seen when watching it vertically from
the top.

- Check if valve seat has no soil and damage.

• Pull negative-pressure valve to open it, and check that it close

completely when released.

- Check that there is no dirt or damage on the valve seat of reservoir

tank cap negative-pressure valve.

- Check that there are no unusualness in the opening and closing

conditions of negative-pressure valve.

• Check reservoir tank cap relief pressure.
- When connecting reservoir tank cap to the radiator cap tester

(commercial service tool) and the radiator cap tester adapter (com-
mercial service tool) (A), apply engine coolant to the cap seal sur-
face.

• Replace reservoir tank cap if there is an unusualness related to the above three.

CAUTION:

When installing reservoir tank cap, thoroughly wipe out the reservoir tank filler neck to remove any
waxy residue or foreign material.

RADIATOR

RADIATOR : Inspection

INFOID:0000000009160415

Check radiator for mud or clogging. If necessary, clean radiator as follows:
• Be careful not to bend or damage radiator fins.
• Tape harness and connectors to prevent water from entering.

Apply water by hose to the back side of the radiator core vertically downward.

Apply water again to all radiator core surfaces once per minute.

Stop washing if any stains no longer flow out from radiator.

JPBIA0108ZZ

SMA967B

Standard and limit

: Refer to

CO-10, "Radiator"

JPBIA0109ZZ

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RADIATOR

CO-9

< PERIODIC MAINTENANCE >

Blow air into the back side of radiator core vertically downward.
• Use compressed air lower than 490 kPa (5 kg/cm

, 71 psi) and keep distance more than 30 cm (11.8 in).

Blow air again into all the radiator core surfaces once per minute until no water sprays out.

Revision: 2012 November

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CO-10

< SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

Periodical Maintenance Specification

INFOID:0000000009160431

ENGINE COOLANT CAPACITY (APPROXIMATELY)

Unit:

(US qt, Imp qt)

Radiator

INFOID:0000000009160432

Unit: kPa (kg/cm

, psi)

Engine coolant capacity [With reservoir tank (Between MIN and MAX level)]

11.3 (12, 10)

Reservoir tank engine coolant capacity (Between MIN and MAX level)

1.2 (1-1/4, 1)

Reservoir tank cap relief pressure

Standard

122.3 - 151.7 (1.2 - 1.5, 18 - 22)

Limit

107 (1.1, 16)

Leakage testing pressure

157 (1.6, 23)

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DEF-1

DRIVER CONTROLS

SECTION

DEF

DEF

CONTENTS

DEFOGGER

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

REAR WINDOW DEFOGGER SYSTEM .............

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

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

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

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

DTC/CIRCUIT DIAGNOSIS ..........................

POWER SUPPLY AND GROUND CIRCUIT .......

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

REAR WINDOW DEFOGGER SWITCH .............

Component Function Check ......................................

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

REAR WINDOW DEFOGGER RELAY ...............

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

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

REAR WINDOW DEFOGGER ...........................

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

DOOR MIRROR DEFOGGER ............................

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

DRIVER SIDE DOOR MIRROR DEFOGGER ....

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

PASSENGER SIDE DOOR MIRROR DEFOG-
GER ....................................................................

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

REAR WINDOW DEFOGGER SYSTEM ............

Wiring Diagram - DEFOGGER SYSTEM - ..............

SYMPTOM DIAGNOSIS ..............................

REAR WINDOW DEFOGGER DOES NOT
OPERATE ...........................................................

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

REAR WINDOW DEFOGGER AND DOOR
MIRROR DEFOGGERS DO NOT OPERATE ...

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

REAR WINDOW DEFOGGER DOES NOT
OPERATE BUT BOTH DOOR MIRROR DE-
FOGGERS OPERATE ......................................

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

DOOR MIRROR DEFOGGER DOES NOT OP-
ERATE ...............................................................

BOTH SIDES ..............................................................

BOTH SIDES : Diagnosis Procedure ......................

DRIVER SIDE .............................................................

DRIVER SIDE : Diagnosis Procedure .....................

PASSENGER SIDE ....................................................

PASSENGER SIDE : Diagnosis Procedure ............

REAR WINDOW DEFOGGER INDICATOR
DOES NOT ILLUMINATE .................................

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

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

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

Precaution for Working Range at a Regular Deal-
ership .......................................................................

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

Precautions Necessary for Steering Wheel Rota-
tion After Battery Disconnection ..............................

Precaution for Battery Service .................................

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

FILAMENT .........................................................

Inspection and Repair ..............................................

CONDENSER ....................................................

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DEF-2

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

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

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REAR WINDOW DEFOGGER SYSTEM

DEF-3

< SYSTEM DESCRIPTION >

DEF

SYSTEM DESCRIPTION

REAR WINDOW DEFOGGER SYSTEM

System Diagram

INFOID:0000000009161586

System Description

INFOID:0000000009161587

Operation Description

• Turn rear window defogger switch ON while the ignition switch is turned ON. Then multifunction switch (rear

window defogger switch) transmits rear window defogger switch signal to AV control unit via AV communica-
tion. AV control unit transmits rear window defogger switch signal to BCM via CAN communication.

• BCM turns rear window defogger relay ON and transmits rear window defogger control signal to IPDM E/R

via CAN communication when rear window defogger switch signal is received.

• Rear window defogger and door mirror defogger are supplied with power and operate when rear window

defogger relay turns ON.

• IPDM E/R transmits rear window defogger control signal to AV control unit via CAN communication.
• AV control unit transmits rear defogger feedback signal to multifunction switch (rear window defogger switch)

via AV communication then rear window defogger indicator is illuminated.

Timer function

• BCM turns rear window defogger relay ON for approximately 15 minutes when rear window defogger switch

is turned ON. It makes rear window defogger and door mirror defogger operate.

• Timer is canceled after pressing rear window defogger switch again during timer operation. Then BCM turns

rear window defogger relay OFF. The same reaction also occurs during timer operation, if the ignition switch
is turned OFF.

JMLIA0005GB

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DEF-4

< SYSTEM DESCRIPTION >

REAR WINDOW DEFOGGER SYSTEM

Component Parts Location

INFOID:0000000009161588

Component Description

INFOID:0000000009161589

Rear window defogger relay (built-in
relay box)

BCM M118, M119, M122, M123

IPDM E/R E6

Rear window defogger switch (built-in
multifunction switch M72)

Rear window defogger connector
B471

Condenser B33

Rear window defogger connector
B472

AV control unit M81, M82

Dash side lower (driver side)

Dash side lower (passenger side)

Engine room dash panel (RH)

Behind rear pillar finisher (LH)

Behind rear pillar finisher (RH)

Behind cluster lid C

JMLIA0180ZZ

Item

Function

BCM

• Operates the rear window defogger with the operation of rear window defogger switch.
• Performs the timer control of rear window defogger.

Rear window defogger relay

Operates the rear window defogger and the door mirror defogger with the control signal from
BCM.

IPDM E/R

Transmit rear window defogger control signal to AV control unit via CAN communication.

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REAR WINDOW DEFOGGER SYSTEM

DEF-5

< SYSTEM DESCRIPTION >

DEF

Multifunction switch
(Rear window defogger
switch)

• The rear window defogger switch is installed.
• Turns the indicator lamp ON when detecting the operation of rear window defogger.

AV control unit

Displays the rear window defogger ON to the display when detecting the operation of rear win-
dow defogger.

Rear window defogger

Heats the heating wire with the power supply from the rear window defogger relay to prevent the
rear window from fogging up.

Door mirror defogger

Heats the heating wire with the power supply from the rear window defogger relay to prevent the
door mirror from fogging up.

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DEF-6

< DTC/CIRCUIT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

DTC/CIRCUIT DIAGNOSIS

POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure

INFOID:0000000009161592

CHECK FUSE AND FUSIBLE LINK

Check that the following fuse and fusible link are not blown.

Is the fuse fusing?

YES

>> Replace the blown fuse or fusible link after repairing the affected circuit if a fuse or fusible link is

blown.

>> GO TO 2.

CHECK POWER SUPPLY CIRCUIT

Turn ignition switch OFF.

Disconnect BCM connectors.

Check voltage between BCM harness connector and ground.

Is the measurement value normal?

YES

>> GO TO 3.

>> Repair harness or connector.

CHECK GROUND CIRCUIT

Check continuity between BCM harness connector and ground.

Does continuity exist?

YES

>> INSPECTION END

>> Repair harness or connector.

Signal name

Fuse and fusible link No.

Battery power supply

Terminals

Voltage

(Approx.)

(+)

(

−

)

BCM

Ground

Connector

Terminal

M118

Battery voltage

M119

BCM

Ground

Continuity

Connector

Terminal

M119

Existed

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Content .. 1 2 ..

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Nissan GT-R (2007-2014 year). ENGINE COOLING SYSTEM / DEFOGGER. Service Manual - part 1