Nissan Qashqai (2007-2010). Manual — part 937

HAC-108

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AIR CONDITIONER CONTROL

SYMPTOM DIAGNOSIS

AIR CONDITIONER CONTROL

Diagnosis Chart By Symptom

INFOID:0000000000954681

Symptom

Reference

A/C system does not come on.

Go to Trouble Diagnosis Procedure for A/C System.

HAC-89, "Diagnosis Proce-

dure"

Air outlet does not change.

Go to Trouble Diagnosis Procedure for Mode Door Motor.
(LAN)

HAC-47, "Diagnosis Proce-

dure"

Mode door motor does not operate
normally.

High-level ventilator door motor
does not operate normally.

Go to Trouble Diagnosis Procedure for High-level Ventilator
Door Motor. (LAN)

HAC-50, "Diagnosis Proce-
dure"

High-level ventilator door does not
change.

Discharge air temperature does not
change.

Go to Trouble Diagnosis Procedure for Air Mix Door Motor.
(LAN)

HAC-54, "Diagnosis Proce-

dure"

Air mix door motor does not operate
normally.

Intake door does not change.

Go to Trouble Diagnosis Procedure for Intake Door Motor.
(LAN)

HAC-59, "Diagnosis Proce-

dure"

Intake door motor does not operate
normally.

Blower motor operation is malfunc-
tioning.

Go to Trouble Diagnosis Procedure for Blower Motor.

HAC-62, "Diagnosis Proce-

dure"

Magnet clutch does not engage.

Go to Trouble Diagnosis Procedure for Magnet Clutch.

HAC-66, "Diagnosis Proce-

dure"

Insufficient cooling

Go to Trouble Diagnosis Procedure for Insufficient Cooling.

HAC-109, "Inspection proce-

dure"

Insufficient heating

Go to Trouble Diagnosis Procedure for Insufficient Heating.

HAC-111, "Inspection proce-

dure"

Noise

Go to Trouble Diagnosis Procedure for Noise.

HAC-113, "Inspection proce-

dure"

Self-diagnosis cannot be per-
formed.

Go to Trouble Diagnosis Procedure for Self-diagnosis.

HAC-115, "Inspection proce-

dure"

Memory function does not operate.

Go to Trouble Diagnosis Procedure for Memory Function.

HAC-116, "Inspection proce-

dure"

INSUFFICIENT COOLING

HAC-109

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

INSUFFICIENT COOLING

Description

INFOID:0000000000954682

Symptom

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

Inspection procedure

INFOID:0000000000954683

1.

CHECK WITH A GAUGE OF ACR4

Connect the 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-32, "Inspection"

(HR16DE/MR20DE) or

HA-83, "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-32, "Inspection"

(HR16DE/MR20DE) or

HA-83, "Inspec-

tion"

(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-12, "SYMPTOM DIAGNOSIS

PROCEDURE : Trouble Diagnosis For Unusual Pressure"

(HR16DE/MR20DE) or

HA-63, "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-12, "SYMPTOM DIAGNOSIS PRO-

CEDURE : Trouble Diagnosis For Unusual Pressure"

(HR16DE/MR20DE) or

HA-63, "SYMPTOM

DIAGNOSIS PROCEDURE : Trouble Diagnosis For Unusual Pressure"

(K9K).

4.

CHECK SETTING OF TEMPERATURE SETTING TRIMMER

Check the setting of temperature setting trimmer. Refer to

HAC-6, "Description & Inspection"

.

1.

Check that the temperature setting trimmer is set to “+ direction”.
NOTE:
The control temperature can be set with the setting of temperature setting trimmer.

2.

Set temperature control dial to “0”.

Are the symptoms solved?

YES

>> Perform the setting separately if necessary. END.

NO

>> GO TO 5.

5.

PERFORM SELF-DIAGNOSIS STEP-2

Perform self-diagnosis STEP-2. Refer to

HAC-27, "Diagnosis Description"

, see No. 1 to 2.

Does code No. 20 appear on the display?

YES

>> GO TO 6.

NO

>> Go to appropriate malfunctioning sensor circuit. Refer to

HAC-27, "Diagnosis Description"

, see

No. 11.

6.

PERFORM SELF-DIAGNOSIS STEP-4

Perform self-diagnosis STEP-4. Refer to

HAC-27, "Diagnosis Description"

, see No.1 to 5.

Is it operated normally?

HAC-110

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

INSUFFICIENT COOLING

YES

>> GO TO 7.

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"

, see No.1 to 10.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Go to appropriate malfunctioning sensor circuit. Refer to

HAC-27, "Diagnosis Description"

.

8.

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 9.

NO

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

9.

CHECK AIR LEAKAGE FROM DUCT

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

Is the inspection result normal?

YES

>> Perform the setting separately if necessary. GO TO 4.

NO

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

INSUFFICIENT HEATING

HAC-111

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

INSUFFICIENT HEATING

Description

INFOID:0000000000954684

Symptom

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

Inspection procedure

INFOID:0000000000954685

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

>> GO TO 2.

NO

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

2.

CHECK SETTING OF TEMPERATURE SETTING TRIMMER

1.

Check the setting of temperature setting trimmer. Refer to

HAC-6, "Description & Inspection"

.

2.

Check that the temperature setting trimmer is set to “

−

direction”.

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

3.

Set temperature control dial to “0”.

Are the symptoms solved?

YES

>> Perform the setting separately if necessary. END.

NO

>> • WITH DIESEL ENGINE: GO TO 3.

• WITH GASOLINE ENGINE: GO TO 4.

3.

CHECK PTC HEATER OPERATION

Check PTC heater. Refer to

HAC-71, "Component Function Check"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace malfunctioning part(s).

4.

CHECK OPERATION

1.

Turn temperature control dial (driver side) and raise temperature setting to 30.0

°

C after warming up the

engine.

2.

Check that warm air blows from outlets.

Is the inspection result normal?

YES

>> END.

NO

>> GO TO 5.

5.

PERFORM SELF-DIAGNOSIS STEP-2

Perform self-diagnosis STEP-2. Refer to

HAC-27, "Diagnosis Description"

, see No. 1 to 2.

Does code No. 20 appear on the display?

YES

>> GO TO 6.

NO

>> Go to appropriate malfunctioning sensor circuit. Refer to

HAC-27, "Diagnosis Description"

, see

No. 11.

6.

PERFORM SELF-DIAGNOSIS STEP-4

Perform self-diagnosis STEP-4. Refer to

HAC-27, "Diagnosis Description"

, see No. 1 to 5.

Is it installed normally?

YES

>> GO TO 7.