Nissan X-Trail 32. Manual - part 1411

AUTOMATIC AIR CONDITIONER SYSTEM

HAC-119

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

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• 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-120, "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-122, "Diagnosis Procedure"

Noise is heard 
when the air 
conditioning op-
erates.

During compressor operation

Cooler cycle 

Symptom table for noise
•

HA-29, "Symptom Table"

 (R9M 

engine models except for Russia)

•

HA-75, "Symptom Table"

 

(MR20DD engine models)

•

HA-120, "Symptom Table"

 

(QR25DE engine models)

•

HA-166, "Symptom Table"

 (R9M 

engine models for Russia)

During blower motor operation

• Mixing any foreign object in blower 

motor

• Blower motor fan breakage
• Blower motor rotation inferiority

Check blower motor.

HAC-109, "Component Inspection 
(Blower Motor)"

Symptom

Corresponding malfunction part

Check item/Reference

HAC-120

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

INSUFFICIENT COOLING

INSUFFICIENT COOLING

Description

INFOID:0000000010939776

Symptom

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

Diagnosis Procedure

INFOID:0000000010939777

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

1.

CHECK MAGNET CLUTCH OPERATION

1.

Turn ignition switch ON.

2.

Push fan switch and operate blower fan.

3.

Press A/C switch.

4.

Check that A/C indicator turns ON. Check visually and by sound that compressor operates.

5.

Press A/C switch again.

6.

Check that A/C indicator turns OFF. Check that compressor stops.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Perform diagnosis of “COMPRESSOR DOES NOT OPERATE” in “SYMPTOM DIAGNOSIS”.

Refer to 

HAC-124, "Diagnosis Procedure"

.

2.

CHECK DRIVE BELT

Check tension of drive belt. Refer to 

EM-23, "Inspection"

 (MR20DD engine models), 

EM-167, "Inspection"

(QR25DE engine models) or 

EM-301, "Inspection"

 (R9M engine models).

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Adjust or replace drive belt depending on the inspection results.

3.

CHECK REFRIGERANT CYCLE PRESSURE

Connect recovery/recycling recharging equipment to the vehicle and perform pressure inspection with gauge.
Refer to 

HA-27, "Symptom Table"

 (M9R engine models except for Russia), 

HA-73, "Symptom Table"

(MR20DD engine models), 

HA-118, "Symptom Table"

 (QR25DE engine models) or 

HA-164, "Symptom Table"

(R9M engine models for Russia).
Is the inspection result normal?

YES

>> GO TO 4.

NO

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

4.

CHECK ECV

Perform ECV circuit diagnosis. Refer to 

HAC-113, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

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

5.

CHECK AIR LEAKAGE FROM EACH DUCT

Check duct and nozzle, etc. of the air conditioning system for leakage.

Is the inspection result normal?

YES

>> GO TO 6.

NO

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

6.

CHECK SETTING OF TEMPERATURE SETTING TRIMMER

1.

Check setting value of temperature setting trimmer. Refer to 

HAC-74, "Temperature Setting Trimmer"

. 

2.

Check that temperature setting trimmer is set to “+ direction”. 
NOTE:

INSUFFICIENT COOLING

HAC-121

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

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The control temperature can be set with the setting of the temperature setting trimmer.

3.

Set difference between the set temperature and control temperature to “0”.

Is inspection result normal?

YES

>> INSPECTION END

NO

>> Replace A/C auto amp. Refer to 

HAC-126, "Removal and Installation"

.

HAC-122

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

INSUFFICIENT HEATING

INSUFFICIENT HEATING

Description

INFOID:0000000010939778

Symptom

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

Diagnosis Procedure

INFOID:0000000010939779

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-13, "Inspection"

 (MR20DD engine mod-

els), 

CO-39, "Inspection"

 (QR25DE engine models) or 

CO-64, "Inspection"

 (R9M engine models).

2.

Check radiator cap or reservoir tank cap. Refer to 

CO-16, "RADIATOR CAP : Inspection"

 (MR20DD

engine models), 

CO-42, "RADIATOR CAP : Inspection"

 (QR25DE engine models) or 

CO-68, "Inspection"

(R9M engine models).

3.

Check water flow sounds of the engine coolant. Refer to 

CO-14, "Refilling"

 (MR20DD engine models),

CO-40, "Refilling"

 (QR25DE engine models) or 

CO-65, "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-46, "HEATER CORE : Removal and Installation"

 (R9M engine

models except for Russia), 

HA-91, "HEATER CORE : Removal and Installation"

 (MR20DD engine

models), 

HA-136, "HEATER CORE : Removal and Installation"

 (QR25DE engine models) or 

HA-

182, "HEATER CORE : Removal and Installation"

 (R9M engine models for Russia).

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-115, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

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