Qashqai J11. Engine cooling system - part 6

 

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Qashqai J11. Engine cooling system - part 6

 

 

CO-82

< PRECAUTION >

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PRECAUTIONS

PRECAUTION

PRECAUTIONS

Precautions for Removing Battery Terminal

INFOID:0000000010508571

• With the adoption of Auto ACC function, ACC power is automatically supplied by operating the intelligent key

or remote keyless entry or by opening/closing the driver side door. In addition, ACC power is supplied even
after the ignition switch is turned to the OFF position, i.e. ACC power is supplied for a certain fixed time.

• When disconnecting the 12V battery terminal, turn off the ACC

power before disconnecting the 12V battery terminal, observing
“How to disconnect 12V battery terminal” described below.
NOTE:
Some ECUs operate for a certain fixed time even after ignition
switch is turned OFF and ignition power supply is stopped. If the
battery terminal is disconnected before ECU stops, accidental DTC
detection or ECU data damage may occur.

•  For vehicles with the 2-batteries, be sure to connect the main bat-

tery and the sub battery before turning ON the ignition switch.
NOTE:
If the ignition switch is turned ON with any one of the terminals of
main battery and sub battery disconnected, then DTC may be detected.

•  After installing the 12V battery, always check "Self Diagnosis Result" of all ECUs and erase DTC.

NOTE:
The removal of 12V battery may cause a DTC detection error.

HOW TO DISCONNECT 12V BATTERY TERMINAL

Disconnect 12V battery terminal according to Instruction 1 or Instruction 2 described below.
For vehicles parked by ignition switch OFF, refer to Instruction 2.

INSTRUCTION 1

1.

Open the hood.

2.

Turn key switch to the OFF position with the driver side door opened.

3.

Get out of the vehicle and close the driver side door.

4.

Wait at least 3 minutes. For vehicle with the engine listed below, remove the battery terminal after a lapse
of the specified time.

CAUTION:

While waiting, never operate the vehicle such as locking, opening, and closing doors. Violation of
this caution results in the activation of ACC power supply according to the Auto ACC function.

5.

Remove 12V battery terminal.

CAUTION:

After installing 12V battery, always check self-diagnosis results of all ECUs and erase DTC.

INSTRUCTION 2 (FOR VEHICLES PARKED BY IGNITION SWITCH OFF)

1.

Unlock the door with intelligent key or remote keyless entry.
NOTE:
At this moment, ACC power is supplied.

2.

Open the driver side door.

3.

Open the hood.

4.

Close the driver side door.

5.

Wait at least 3 minutes.

SEF289H

D4D engine

: 20 minutes

HRA2DDT

: 12 minutes

K9K engine

: 4 minutes

M9R engine

: 4 minutes

R9M engine

: 4 minutes

V9X engine

: 4 minutes

PRECAUTIONS

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< PRECAUTION >

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CAUTION:

While waiting, never operate the vehicle such as locking, opening, and closing doors. Violation of
this caution results in the activation of ACC power supply according to the Auto ACC function.

6.

Remove 12V battery terminal.

CAUTION:

After installing 12V battery, always check self-diagnosis results of all ECUs and erase DTC.

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

INFOID:0000000010416521

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. 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.

CO-84

< PREPARATION >

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PREPARATION

PREPARATION

PREPARATION

Special Service Tool

INFOID:0000000010438990

NISSAN tool number
(RENAULT too number)
Tool name

Description

WS39930000
(        —       )
Tube pressure

Pressing the tube of liquid gasket

 —
(M.S. 554-07)
Tester

Leak checking
Checking reservoir tank cap

 —
(M.S. 554-01)
Reservoir tank cap tester adapter A

Adapting tester to reservoir tank

 —
(M.S. 554-06)
Reservoir tank cap tester adapter B

Adapting tester to reservoir tank cap

NI. 205
 —
Coolant refill tool

Refilling engine cooling system

S-NT052

MLIA0012E

MLIA0013E

MLIA0014E

LMA053

DESCRIPTION

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< SYSTEM DESCRIPTION >

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SYSTEM DESCRIPTION

DESCRIPTION

Engine Cooling System

INFOID:0000000010416519

Schema

Desciption

E1BIA1150ZZ

1.

Reservoir tank 

2.

Water pump

3.

Bleed screw

4.

EGR cooler

5.

Heater core

6.

Heating elements (Thermo plungers)

7.

Thermostat

8.

Radiator

9.

Water-oil heat exchanger

10.

Water valve

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< SYSTEM DESCRIPTION >

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DESCRIPTION

1.

Engine cold
• On cold engine start, the water valve (3) is closed to prevent the flow of water around combustion cham-

bers. 

2.

Engine warm
• Once the optimum temperature of combustion chambers is reached, the water valve (3) opens and the

cooling circuit returns to its nominal operating mode.

E1BIA0642ZZ

1.

Engine

2.

Water pump

3.

Water valve

4.

Thermostat 5.

Radiator

6.

Heater 

core

7.

EGR cooler

8.

Reservoir tank

A.

Engine cold

B.

Engine warm

OVERHEATING CAUSE ANALYSIS

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< SYMPTOM DIAGNOSIS >

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SYMPTOM DIAGNOSIS

OVERHEATING CAUSE ANALYSIS

Troubleshooting Chart

INFOID:0000000010416520

Symptom

Check items

Cooling sys-
tem parts 
malfunction

Poor heat transfer

Water pump malfunction

Worn or loose drive belt

Thermostat stuck closed

Damaged radiator fins

Dust contamination or pa-
per clogging

Physical damage

Clogged radiator cooling 
tube

Excess foreign material 
(rust, dirt, sand, etc.)

Reduced air flow

Cooling fan does not oper-
ate

Fan assembly

High resistance to fan rota-
tion

Damaged fan blades

Damaged radiator shroud

Improper engine coolant 
mixture ratio

Poor engine coolant quality

Engine coolant viscosity

Insufficient engine coolant

Engine coolant leakage

Cooling hose

Loose clamp

Cracked hose

Water pump

Poor sealing

Reservoir tank cap

Loose

Poor sealing

Radiator

O-ring for damage, deterio-
ration or improper fitting

Cracked radiator tank

Cracked radiator core

Reservoir tank

Cracked reservoir tank

Overflowing reservoir tank

Exhaust gas leakage into 
cooling system

Cylinder head deterioration

Cylinder head gasket deteri-
oration

CO-88

< SYMPTOM DIAGNOSIS >

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OVERHEATING CAUSE ANALYSIS

Except cool-
ing system 
parts mal-
function

Overload on engine

Abusive driving

High engine rpm under no 
load

Driving in low gear for ex-
tended time

Driving at extremely high 
speed

Power train system mal-
function

Installed improper size 
wheels and tires

Dragging brakes

Improper ignition timing

Blocked or restricted air 
flow

Blocked bumper

Blocked radiator grille

Installed car brassiere

Mud contamination or paper 
clogging

Blocked radiator

Blocked condenser

Blocked air flow

Installed large fog lamp

Symptom

Check items

ENGINE COOLANT

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PERIODIC MAINTENANCE

ENGINE COOLANT

Inspection

INFOID:0000000010416523

LEVEL 

• Check if the reservoir tank engine coolant level is within the “MIN”

to “MAX” when the engine is cool.

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

WARNING:

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

LEAKAGE

• To check for leakage, fit the adapter (B) to the reservoir tank, and

then connect it to the reservoir tank cap tester [SST: — (M.S.554-
07)] (A) as shown.

WARNING:

Never remove reservoir tank cap when engine is hot. Serious
burns could occur from high-pressure engine coolant escap-
ing from reservoir tank.

CAUTION:

Higher test pressure than specified may cause radiator dam-
age.

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

Draining

INFOID:0000000010464248

WARNING:

• Never remove radiator cap when engine is hot. Serious burns may occur from high-pressure engine

coolant escaping from radiator. 

• Wrap a thick cloth around the radiator cap. Slowly turn it a quarter of a turn to release built-up pres-

sure. Then turn it all the way.

1.

Remove engine under cover.

2.

Remove reservoir tank cap.

3.

Open radiator drain plug (1) of radiator. 

CAUTION:

Perform this step when engine is cold.

4.

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

CO-17,

"Exploded View"

.

5.

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

CO-91, "Flushing"

.

Refilling

INFOID:0000000010464212

CAUTION:

E1BIA1145ZZ

Testing pressure: Refer to 

CO-106, "Radiator"

.

E1BIA1148ZZ

: Vehicle front

E1BIA1139ZZ

CO-90

< PERIODIC MAINTENANCE >

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ENGINE COOLANT

• Never 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-59, "Fluids and Lubricants"

.

1.

Install reservoir tank if removed and radiator drain plug (1).

CAUTION:

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

2.

Check that each hose clamp has been firmly tightened.

3.

Open radiator air relief plug (1). 

4.

Disconnect heater hose (1) at position (

) in the figure.

• Enhance heater hose as high as possible.

5.

Open air relief plug (1).

6.

Fill reservoir tank with engine coolant.

CAUTION:

Never adhere the engine coolant to electronic equipments (alternator etc.).
• Pour coolant slowly of less than 3   (2-5/8 Imp qt) per minute to allow air in system to escape.

E1BIA1139ZZ

: Vehicle front

E1BIA1141ZZ

: Vehicle front

JPBIA4208ZZ

: Vehicle front

E1BIA1151ZZ

ENGINE COOLANT

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7.

When engine coolant spill from radiator air relief plug with continuous flow, close air relief plug and con-
tinue filling reservoir tank. 

8.

When engine coolant spill from air relief plug with continuous flow, close air relief plug and continue filling
reservoir tank. 

9.

When engine coolant spill from heater hose with continuous
flow, connect heater hose and continue filling reservoir tank until
reach “MAX” level 

10.

11. Install radiator cap.

12. Warm up engine at 3000 rpm until thermostat is opened.

• 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.

13. 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.

CAUTION:

Never adhere the engine coolant to electronic equipments (alternator etc.).

14. Refill reservoir tank to “MAX” level line with engine coolant.

15. Repeat steps 11 through 15 two or more times with radiator cap installed until engine coolant level no

longer drops. 

16. Check cooling system for leakage with engine running.

17. Warm up the engine, and check for flowing noise while repeat at least three time slow acceleration from

idle up to 3,000 rpm.

18. If flowing noise is heard, bleed air from cooling system by repeating step 11 through 17 until flowing noise

is no longer heard. 

Flushing

INFOID:0000000010464247

1.

Install reservoir tank if removed and radiator drain plug (1). 

CAUTION:

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

Engine coolant capacity
(With reservoir tank at “MAX” level)

Refer to 

CO-106, "Periodical Maintenance Specifica-

tion"

.

A

:  MAX

B

:  MIN

Reservoir tank engine coolant capacity 
(At “MAX” level)

Refer to 

CO-106, "Periodical Maintenance Specifica-

tion"

.

JPBIA0102ZZ

E1BIA1139ZZ

CO-92

< PERIODIC MAINTENANCE >

[R9M]

ENGINE COOLANT

2.

Open radiator air relief plug (1). 

3.

Disconnect heater hose (1) at position (

) in the figure.

• Enhance heater as high as possible.

4.

Open air relief plug (1). 

5.

Fill reservoir tank with water.
• When engine coolant over flows opened radiator air relief plug, close air relief plug, and continue filling

the engine coolant.

• When engine coolant over flows opened water outlet air relief plug, close air relief plug, and continue fill-

ing the engine coolant.

• When engine coolant over flows disconnected heater hose, connect heater hose, and continue filling the

engine coolant.

6.

Install radiator cap.

7.

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

8.

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

9.

Stop the engine and wait until it cools down.

10. Drain water from the system. Refer to 

CO-89, "Draining"

.

11. Repeat steps 1 through 10 until clear water begins to drain from radiator.

: Vehicle front

E1BIA1141ZZ

: Vehicle front

JPBIA4208ZZ

: Vehicle front

E1BIA1151ZZ

RESERVOIR TANK CAP

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RESERVOIR TANK CAP

Inspection

INFOID:0000000010416527

• Fit the adapter to the reservoir tank cap tester [SST: — (M.S. 554-

07)] (A) as shown.

• When connecting the reservoir tank cap to the reservoir tank cap

tester, apply water or LLC to the reservoir tank cap seal part.

• Check reservoir tank cap relief pressure.

• Replace the reservoir tank cap if the engine coolant passes

through it, or if any fur signs is detected.

CAUTION:

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

Standard: Refer to 

CO-106, "Radiator"

.

E1BIA0057ZZ

CO-94

< PERIODIC MAINTENANCE >

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RADIATOR

RADIATOR

Inspection

INFOID:0000000010438944

Check radiator for mud or clogging. If necessary, clean radiator as follows.

CAUTION:

• Never bend or damage the radiator fins.
• When radiator is cleaned without removal, remove all surrounding parts such as radiator fan, radia-

tor shroud and horns. Then tape the harness and connectors to prevent water from entering.

1.

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

2.

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

3.

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

4.

Blow air into the back side of radiator core vertically downwards.

• Use compressed air lower than 490 kPa (4.9 bar 5 kg/cm

2

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

in). 

5.

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

RADIATOR

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REMOVAL AND INSTALLATION

RADIATOR

Exploded View

INFOID:0000000010438945

Refer to 

GI-4, "Components"

 for symbol marks in the figure.

Removal and Installation

INFOID:0000000010438946

REMOVAL

WARNING:

• Never remove reservoir tank cap when engine is hot. Serious burns may occur from high-pressure

engine coolant escaping from radiator. 

• Wrap a thick cloth around the reservoir tank cap. Slowly turn it a quarter of a turn to release built-up

pressure. Then turn it all the way.

1.

Radiator core support

2.

Radiator hose (upper)

3.

Radiator hose (lower)

4.

Cooling fan assembly

5.

Clip

6.

Air guide (LH)

7.

Mounting rubber

8.

Radiator

9.

Air guide (Lower)

10. Air guide (RH)

11.

Intercooler

12. Radiator mounting bracket

E1BIA1116GB

CO-96

< REMOVAL AND INSTALLATION >

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RADIATOR

NOTE:
When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-
ing.

1.

Drain engine coolant from radiator. Refer to 

CO-11, "Draining"

.

CAUTION:

• Perform this step when the engine is cold.
• Never spill engine coolant on drive belt.

2.

Remove front bumper. Refer to 

EXT-19, "Removal and Installation"

.

3.

Remove air inlet tube and air inlet hose. Refer to 

EM-27, "Removal and Installation"

.

4.

Remove charge air cooler. Refer to 

EM-27, "Removal and Installation"

.

5.

Separate condenser from radiator.

6.

Remove radiator hose (upper and lower).

7.

Disconnect harness connectors from cooling fan, and move harness aside.

8.

Remove radiator and cooling fan assembly.

CAUTION:

Be careful not to damage radiator core and condenser  core.
NOTE:
In case of lower pin radiator is damaged, it can be repaired instead of replacing the radiator.

INSTALLATION

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

CAUTION:

• Replace water hose clamp if it is removed.
• Use genuine mounting bolts for the cooling fan assembly and strictly observe the tightening torque.

(Breakage prevention for radiator)
Never reuse o-ring

NOTE:
• Insert the radiator hose (1) all the way to the stopper (2) or by 33 mm (1.30in) (hose without a stopper)

• For the orientation of the hose clamp pawl, refer to the figure.

*: Refer to the illustrations for the specific position each hose clamp tab.

Unit: mm (in)

A.

Radiator side

B.

Engine side

JPBIA4294GB

Radiator hose

Hose end

Paint mark

Position of hose clamp*

Radiator hose (upper)

Radiator side

Upper

A

Engine side

Upper

B

Radiator hose (lower)

Radiator side

Lower

C

Engine side

Upper

D

RADIATOR

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• The angle (b) created by the hose clamp pawl and the specified

line (A) must be within 

±

30

°

 as shown in the figure.

• To install hose clamps (1), check that the dimension (A) from the

end of the paint mark (2) on the radiator hose to the hose clamp is
within the reference value.

Inspection

INFOID:0000000010438947

INSPECTION AFTER INSTALLATION

• Check for leakage of engine coolant using the radiator cap tester adapter (commercial service tool) and the

radiator cap tester (commercial service tool). Refer to 

CO-97, "Inspection"

.

• Start and warm up the engine. Check visually that there is no leakage of engine coolant.

E.

View E

f.

45

°

g.

45

°

: Vehicle upper

JSBIA1059ZZ

JPBIA4295ZZ

Dimension “A”

: 3 mm (0.12 in)

JPBIA4374ZZ

 

 

 

 

 

 

 

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