Nissan Qashqai J11. Manual - part 1121

HAC-120

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

PTC HEATER

Component Inspection (PTC Heater)

INFOID:0000000010499358

1.

CHECK PTC HEATER

Check resistance between PTC heater terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace PTC heater. Refer to 

HAC-135, "Removal and Installation"

.

Terminal

Resistance (

Ω

)

1

2

Except 0 or 

∞

3

2 and 4

5

4

AUTOMATIC AIR CONDITIONER SYSTEM

HAC-121

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

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K

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M

A

B

HAC

N

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SYMPTOM DIAGNOSIS

AUTOMATIC AIR CONDITIONER SYSTEM

Symptom Table

INFOID:0000000010432242

NOTE:
Perform self-diagnoses with CONSULT and on board diagnosis before performing the symptom diagnosis. If
any DTC is detected, perform the corresponding diagnosis.

Symptom

Corresponding malfunction part

Check item/Reference

Air conditioning 
cannot be con-
trolled.

All control

• A/C control power supply or ground 

circuit

• A/C auto amp.

Check A/C control power supply 
and ground circuits.
Refer to 

HAC-108, "A/C CONTROL 

: Diagnosis Procedure"

.

A part of control

A/C control

Replace A/C control.
Refer to 

HAC-128, "Removal and 

Installation"

.

A/C control display or switch indicator lamp does not 
display correctly.
NOTE:
The results of A/C control on board diagnosis are nor-
mal.

A/C auto amp.

Replace A/C auto amp.
Refer to 

HAC-108, "A/C AUTO 

AMP. : Diagnosis Procedure"

.

Discharge air temperature (driver side) does not 
change.

Air mix door motor (driver side) system 
installation condition

Check air mix door motor (driver 
side) system is properly installed. 
Refer to 

HAC-137, "Exploded 

View"

.

Discharge air temperature (passenger side) does not 
change.

Air mix door motor (passenger side) 
system installation condition

Check air mix door motor (passen-
ger side) system is properly in-
stalled. Refer to 

HAC-137, 

"Exploded View"

.

Air outlet does not change.

Mode door motor system installation 
condition

Check mode door motor system is 
properly installed. Refer to 

HAC-

137, "Exploded View"

.

Air inlet does not change.

Intake door motor system installation 
condition

Check intake door motor system is 
properly installed. Refer to 

HAC-

137, "Exploded View"

.

Blower motor does not operates or operation speed is 
not normal.

• Blower  motor
• Power transistor
• Power transistor power supply or 

ground circuits

• Blower motor control or ground cir-

cuits

• Power transistor control signal cir-

cuits

• Blower motor feedback signal circuits
• A/C auto amp.

Check blower motor circuits.

HAC-110, "Diagnosis Procedure"

 

Compressor does not operate. 

• Magnet clutch
• Magnet clutch power supply circuits
• Magnet clutch ground circuits
• IPDM E/R (A/C relay)
• The circuit between ECM and refrig-

erant pressure sensor

• Refrigerant pressure sensor
• ECM
• A/C auto amp.

Check magnet clutch circuits.

HAC-114, "Component Function 
Check"

HAC-122

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

AUTOMATIC AIR CONDITIONER SYSTEM

• Insufficient cooling
• No cool air comes out. (Air flow volume is normal.)

• Magnet clutch control system
• Drive belt slipping
• Cooler cycle
• ECV (Electrical control valve)
• Air leakage from each duct
• Temperature setting trimmer

HAC-123, "Diagnosis Procedure"

• Insufficient heating
• No warm air comes out. (Air flow volume is normal.)

• Engine cooling system
• Heater hose
• Heater core
• Air leakage from each duct
• PTC heater system (with PTC heat-

er)

• Temperature setting trimmer

HAC-125, "Diagnosis Procedure"

Noise is heard 
when the air 
conditioning op-
erates.

During compressor operation

Cooler cycle 

Symptom table for noise
•

HA-30, "Symptom Table"

 

(HRA2DDT and MR16DDT en-
gine models for Europe)

•

HA-74, "Symptom Table"

 (K9K 

and R9M engine models for Eu-
rope)

•

HA-121, "Symptom Table"

 

(HRA2DDT, MR16DDT and 
MR20DD engine models except 
for Europe)

•

HA-170, "Symptom Table"

 (K9K 

and R9M engine models except 
for Europe)

During blower motor operation

• Mixing any foreign object in blower 

motor

• Blower motor fan breakage
• Blower motor rotation inferiority

Check blower motor.

HAC-112, "Component Inspection 
(Blower Motor)"

Symptom

Corresponding malfunction part

Check item/Reference

INSUFFICIENT HEATING

HAC-123

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

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INSUFFICIENT HEATING

Description

INFOID:0000000010432245

Symptom

• Insufficient heating
• No warm air comes out. (Air flow volume is normal.)

Diagnosis Procedure

INFOID:0000000010432246

NOTE:
Perform self-diagnoses with CONSULT before performing symptom diagnosis. If any DTC is detected, per-
form the corresponding diagnosis.

1.

CHECK COOLING SYSTEM

1.

Check engine coolant level and check for leakage. Refer to 

CO-11, "Inspection"

 (HRA2DDT engine mod-

els), 

CO-38, "Inspection"

 (MR20DD engine models), 

CO-65, "Inspection"

 (K9K engine models) or 

CO-89,

"Inspection"

 (R9M engine models).

2.

Check reservoir tank cap. Refer to 

CO-15, "Inspection"

 (HRA2DDT engine models), 

CO-41, "Inspection"

(MR20DD engine models), 

CO-68, "Inspection"

 (K9K engine models) or 

CO-93, "Inspection"

 (R9M engine

models).

3.

Check water flow sounds of the engine coolant. Refer to 

CO-11, "Refilling"

 (HRA2DDT engine models),

CO-38, "Refilling"

 (MR20DD engine models), 

CO-65, "Refilling"

 (K9K engine models) or 

CO-89, "Refilling"

(R9M engine models).

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Refill engine coolant and repair or replace the parts depending on the inspection results.

2.

CHECK HEATER HOSE

Check installation of heater hose by visually or touching.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace parts depending on the inspection results.

3.

CHECK HEATER CORE

1.

Check temperature of inlet hose and outlet hose of heater core.

2.

Check that inlet side of heater core is hot and the outlet side is slightly lower than/almost equal to the inlet
side.

CAUTION:

Always perform the temperature inspection in a short period of time because the engine coolant
temperature is very hot.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace heater core. Refer to 

HA-45, "HEATER CORE : Removal and Installation"

 (HRA2DDT

and MR20DD engine models for Europe), 

HA-89, "HEATER CORE : Removal and Installation"

(K9K and R9M engine models for Europe), 

HA-137, "HEATER CORE : Removal and Installation"

(HRA2DDT and MR20DD engine models except for Europe) or 

HA-185, "HEATER CORE :

Removal and Installation"

 (K9K and R9M engine models except for Europe).

4.

CHECK AIR LEAKAGE FROM EACH DUCT

Check duct and nozzle, etc. of the air conditioning system for air leakage.
Is the inspection result normal?

YES-1 >> With PTC heater: GO TO 5.
YES-2 >> Without PTC heater: GO TO 6.
NO

>> Repair or replace parts depending on the inspection results.

5.

CHECK PTC HEATER

Perform PTC heater diagnosis. Refer to 

HAC-116, "Diagnosis Procedure"

.