Nissan Qashqai (2007-2010). Manual — part 957

HAC-188

< SYMPTOM DIAGNOSIS >

[MANUAL AIR CONDITIONER]

INSUFFICIENT COOLING

INSUFFICIENT COOLING

Description

INFOID:0000000001070003

Symptom

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

Inspection procedure

INFOID:0000000001070004

1.

CHECK WITH A GAUGE OF ACR4

Connect ACR4 to the vehicle and perform the pressure inspection with the gauge.

Is there refrigerant?

YES

>> GO TO 2.

NO-1

>> Check for refrigerant leakages with the refrigerant leakage detecting fluorescent leak detector.

Refer to

HA-134, "Inspection"

(HR16DE/MR20DE) or

HA-185, "Inspection"

(K9K).

NO-2

>> GO TO 2 after repairing or replacing the parts according to the inspection results.

2.

CHECK CHARGED REFRIGERANT AMOUNT

1.

Connect ACR4 to the vehicle and discharge the refrigerant.

2.

Recharge with the proper amount of refrigerant and perform the inspection with the refrigerant leakage
detecting fluorescent leak detector. Refer to

HA-134, "Inspection"

(HR16DE/MR20DE) or

HA-185,

"Inspection"

(K9K).

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Refill the refrigerant and repair or replace the parts according to the inspection results.

3.

CHECK REFRIGERANT CYCLE PRESSURE

Connect ACR4 to the vehicle and perform the performance test. Refer to

HA-114, "SYMPTOM DIAGNOSIS

PROCEDURE : Trouble Diagnosis For Unusual Pressure"

(HR16DE/MR18DE) or

HA-165, "SYMPTOM DIAG-

NOSIS PROCEDURE : Trouble Diagnosis For Unusual Pressure"

(K9K).

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Perform the diagnosis with the gauge pressure. Refer to

HA-114, "SYMPTOM DIAGNOSIS PRO-

CEDURE : Trouble Diagnosis For Unusual Pressure"

(HR16DE/MR20DE) or

HA-165, "SYMP-

TOM DIAGNOSIS PROCEDURE : Trouble Diagnosis For Unusual Pressure"

(K9K).

4.

CHECK A/C COMPRESSOR BELT

Check the A/C compressor belt. Refer to

EM-15, "Checking"

(HR16DE),

EM-134, "Checking"

(MR20DE) or

EM-259, "Inspection and Adjustment"

(K9K).

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Adjust or replace the A/C compressor belt.

5.

CHECK AIR MIX DOOR CABLE

Check the air mix door cable. Refer to

HAC-126, "Description & Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Adjust or replace the air mix door cable.

6.

CHECK AIR LEAKAGE FROM DUCT

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

YES

>> END.

NO

>> Repair or replace parts according to the inspection results.

INSUFFICIENT HEATING

HAC-189

< SYMPTOM DIAGNOSIS >

[MANUAL AIR CONDITIONER]

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INSUFFICIENT HEATING

Description

INFOID:0000000001070005

Symptom

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

Inspection procedure

INFOID:0000000001070006

1.

CHECK COOLING SYSTEM

1.

Check engine coolant level and check for leakage. Refer to

CO-9, "Inspection"

(HR16DE),

CO-30,

"Inspection"

(MR20DE) or

CO-52, "Inspection"

(K9K).

2.

Check radiator cap. Refer to

CO-12, "RESERVOIR TANK CAP : Inspection"

(HR16DE),

CO-33, "RESER-

VOIR TANK CAP : Inspection"

(MR20DE) or

CO-55, "RADIATOR CAP : Inspection"

(K9K).

3.

Check water flow sounds of engine coolant. Refer to

CO-9, "Refilling"

(HR16DE),

CO-30, "Refilling"

(MR20DE) or

CO-52, "Refilling"

(K9K).

Is the inspection result normal?

YES

>> • WITH DIESEL ENGINE: GO TO 2.

• WITH GASOLINE ENGINE: GO TO 3.

NO

>> Refill the engine coolant and repair or replace the parts according to the inspection results.

2.

CHECK PTC HEATER OPERATION

Check PTC heater. Refer to

HAC-162, "Component Function Check"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace malfunctioning part(s).

3.

CHECK OPERATION

1.

Turn temperature control dial to full hot after warming up the engine.

2.

Check that warm air blows from outlets.

Is the inspection result normal?

YES

>> END.

NO

>> GO TO 4.

4.

CHECK AIR MIX DOOR CABLE

Check the air mix door cable. Refer to

HAC-126, "Description & Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Adjust or replace the air mix door cable.

5.

CHECK AIR LEAKAGE FROM DUCT

Check duct and nozzle, etc. of A/C system for air leakage.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace parts according to the inspection results.

6.

CHECK HEATER HOSE INSTALLATION CONDITION

Check the heater hose installation condition visually (for twist, crush, etc.).
Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace parts according to the inspection results.

7.

CHECK TEMPERATURE OF HEATER HOSE

1.

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

2.

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

HAC-190

< SYMPTOM DIAGNOSIS >

[MANUAL AIR CONDITIONER]

INSUFFICIENT HEATING

CAUTION:

The temperature inspection should be performed in a short time because the engine coolant tem-
perature is too hot.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace the heater core after performing the procedures after the cooling system inspection

again. GO TO 1.

8.

REPLACE HEATER CORE

Replace the heater core. Refer to

VTL-87, "Exploded View"

.

Are the symptoms solved?

YES

>> END.

NO

>> Perform the procedures after the cooling system inspection again. GO TO 1.

NOISE

HAC-191

< SYMPTOM DIAGNOSIS >

[MANUAL AIR CONDITIONER]

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NOISE

Description

INFOID:0000000001070007

Symptom

• Noise
• Noise is heard when the A/C system operates.

Inspection procedure

INFOID:0000000001070008

1.

CHECK OPERATION

1.

Operate the A/C system and check the operation. Refer to

HAC-126, "Description & Inspection"

.

2.

Check the parts where noise is occurring.

Can the parts where noise is occurring be checked?

YES-1 >> Noise from blower fan motor: GO TO 2.
YES-2 >> Noise from compressor: GO TO 3.
YES-3 >> Noise from expansion valve: GO TO 4.
YES-4 >> Noise from A/C piping (pipe, flexible hose): GO TO 6.
YES-5 >> Noise from A/C compressor belt: GO TO 7.
NO

>> END

2.

CHECK BLOWER FAN MOTOR

1.

Remove blower fan motor.

2.

Remove air conditioner filter.

3.

Remove foreign materials that are in the blower unit.

4.

Check the noise from blower fan motor again.

Is the inspection result normal?

YES

>> END.

NO

>> Replace blower fan motor.

3.

REPLACE COMPRESSOR

1.

Correct the refrigerant with ACR4.

2.

Recharge with the proper amount of the collected refrigerant after recycling or new refrigerant.

3.

Check for the noise from compressor again.

Is the inspection result normal?

YES

>> END.

NO

>> Replace compressor.

4.

CHECK WITH GAUGE PRESSURE

Perform the diagnosis with the gauge pressure. Refer to

HA-114, "SYMPTOM DIAGNOSIS PROCEDURE :

Trouble Diagnosis For Unusual Pressure"

(HR16DE/MR20DE) or

HA-165, "SYMPTOM DIAGNOSIS PROCE-

DURE : Trouble Diagnosis For Unusual Pressure"

(K9K).

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace malfunctioning part(s).

5.

REPLACE EXPANSION VALVE

1.

Correct the refrigerant with ACR4.

2.

Recharge with the proper amount of the collected refrigerant after recycling or new refrigerant.

3.

Check for the noise from expansion valve again.

Are the symptoms solved?

YES

>> END.

NO

>> Replace expansion valve.

6.

CHECK A/C PIPING (PIPE, FLEXIBLE HOSE)

1.

Check A/C piping [pipe, flexible hose (for deformation and damage, etc.)].

2.

Check the installation condition of clips and brackets, etc. of A/C piping (pipe, flexible hose).