Nissan Qashqai (2007-2010). Manual — part 938

HAC-112

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

INSUFFICIENT HEATING

NO

>> Perform the diagnosis applicable to each output device.

7.

PERFORM SELF-DIAGNOSIS STEP-5

Perform self-diagnosis STEP-5. Refer to

HAC-27, "Diagnosis Description"

.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Go to appropriate malfunctioning sensor circuit. Refer to

HAC-27, "Diagnosis Description"

.

8.

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 9.

NO

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

9.

CHECK HEATER HOSE INSTALLATION CONDITION

Check the heater hose installation condition visually (for twist, crush, etc.).

Is the inspection result normal?

YES

>> GO TO 10.

NO

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

10.

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.

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 11.

NO

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

again. GO TO 1.

11.

REPLACE HEATER CORE

Replace the heater core. Refer to

VTL-41, "Exploded View"

.

Are the symptoms solved?

YES

>> END.

NO

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

NOISE

HAC-113

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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NOISE

Description

INFOID:0000000000954686

Symptom

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

Inspection procedure

INFOID:0000000000954687

1.

CHECK OPERATION

1.

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

HAC-6, "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 foreign materials that are in the blower unit.

3.

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-12, "SYMPTOM DIAGNOSIS PROCEDURE :

Trouble Diagnosis For Unusual Pressure"

(HR16DE/MR20DE) or

HA-63, "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).

Is the inspection result normal?

HAC-114

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

NOISE

YES

>> Fix the line with rubber or come vibration absorbing material.

NO

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

7.

CHECK A/C COMPRESSOR BELT

Check tension of 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

>> Check the noise from compressor: GO TO 3.

NO

>> Adjust or replace the A/C compressor belt according to the inspection results.

SELF-DIAGNOSIS CANNOT BE PERFORMED

HAC-115

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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SELF-DIAGNOSIS CANNOT BE PERFORMED

Description

INFOID:0000000000954688

Symptom: Self-diagnosis function does not operate normally.

Inspection procedure

INFOID:0000000000954689

1.

CHECK SELF-DIAGNOSIS FUNCTION

1.

Turn ignition switch ON.

2.

Set in self-diagnosis mode as follows. Within 10 seconds after starting engine (ignition switch is turned
ON.), press ON/OFF switch for at least 5 seconds.

NOTE:
If battery voltage drops below 12 V during diagnosis STEP-3, door motor speed becomes slower and as a
result, the system may generate an error even when operation is normal. To avoid this, start engine before
performing this diagnosis.

Does self-diagnosis function operate?

YES

>> END.

NO

>> GO TO 2.

2.

CHECK POWER SUPPLY AND GROUND CIRCUIT OF AUTO AMP

Check power supply and ground circuit of auto amp. Refer to

HAC-89, "Component Function Check"

.

Is the inspection result normal?

YES

>> Replace auto amp.

NO

>> Repair or replace malfunctioning part(s).