Nissan Qashqai (2007-2010). Manual — part 930

HAC-80

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

IN-VEHICLE SENSOR

IN-VEHICLE SENSOR

Description

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In-vehicle Sensor
The in-vehicle sensor (1) is located on lower instrument panel, driver
side. It converts variations in temperature of compartment air drawn
from the aspirator into a resistance value. It is then input into the
auto amp.

In-vehicle Sensor Circuit

Aspirator
The aspirator (1) is located on driver’s side of A/C unit assembly. It
produces vacuum pressure due to air discharged from the A/C unit
assembly, continuously taking compartment air in the aspirator.

Component Function Check

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1.

PERFORM SELF-DIAGNOSIS STEP-2

Perform self-diagnosis STEP-2. Refer to

HAC-27, "Diagnosis Description"

, see No. 1 to 3.

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:

Vehicle front

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IN-VEHICLE SENSOR

HAC-81

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

22 or –22 is displayed.

YES

>> Go to Diagnosis Procedure. Refer to

HAC-81, "Diagnosis Procedure"

.

NO

>> END.

Diagnosis Procedure

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1.

CHECK VOLTAGE BETWEEN IN-VEHICLE SENSOR AND GROUND

1.

Disconnect in-vehicle sensor connector.

2.

Turn ignition switch ON.

3.

Check voltage between in-vehicle sensor harness connector M41 terminal 1 and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND AUTO AMP.

1.

Turn ignition switch OFF.

2.

Disconnect auto amp. connector.

3.

Check continuity between in-vehicle sensor harness connector M41 terminal 2 and auto amp. harness
connector M53 terminal 26.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK IN-VEHICLE SENSOR

Refer to

HAC-82, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace auto amp.

NO

>> Replace in-vehicle sensor.

4.

CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND AUTO AMP.

1.

Turn ignition switch OFF.

2.

Disconnect auto amp. connector.

3.

Check continuity between in-vehicle sensor harness connector M41 terminal 1 and auto amp. harness
connector M53 terminal 27.

4.

Check continuity between in-vehicle sensor harness connector M41 terminal 1 and ground.

Is the inspection result normal?

(+)

(

−

)

Voltage

In-vehicle sensor

—

Connector

Terminal

M41

1

Ground

Approx. 5

In-vehicle sensor

Auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M41

2

M53

26

Continuity should exist

In-vehicle sensor

Auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M41

1

M53

27

Continuity should exist

In-vehicle sensor

—

Continuity

Connector

Terminal

M41

1

Ground

Continuity should not exist

HAC-82

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

IN-VEHICLE SENSOR

YES

>> Replace auto amp.

NO

>> Repair harness or connector.

Component Inspection

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After disconnecting in-vehicle sensor (1) connector M41, measure
resistance between terminals 1 and 2 at sensor side. Refer to table
below.

If NG, replace in-vehicle sensor.

Temperature

°

C (

°

F)

Resistance k

Ω

−

15 (5)

12.73

−

10 (14)

9.92

−

5 (23)

7.80

0 (32)

6.19

5 (41)

4.95

10 (50)

3.99

15 (59)

3.24

20 (68)

2.65

25 (77)

2.19

30 (86)

1.81

35 (95)

1.51

40 (104)

1.27

45 (113)

1.07

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SUNLOAD SENSOR

HAC-83

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

SUNLOAD SENSOR

Description

INFOID:0000000000954668

COMPONENT DESCRIPTION

Sunload Sensor

The sunload sensor (1) is located on the tweeter grille (RH). It
detects sunload entering through windshield by means of a photo
diode. The sensor converts the sunload into a current value which is
then input into the auto amp.

Sunload Sensor Circuit

SUNLOAD INPUT PROCESS

The auto amp. also includes a processing circuit which averages the variations in detected sunload over a
period of time. This prevents drastic swings in the HAC system operation due to small or quick variations in
detected sunload.
For example, consider driving along a road bordered by an occasional group of large trees. The sunload
detected by the sunload sensor will vary whenever the trees obstruct the sunlight. The processing circuit aver-
ages the detected sunload over a period of time, so that the (insignificant) effect of the trees momentarily
obstructing the sunlight does not cause any change in the HAC system operation. On the other hand, shortly
after entering a long tunnel, the system will recognize the change in sunload, and the system will react accord-
ingly.

Component Function Check

INFOID:0000000000954669

1.

PERFORM SELF-DIAGNOSIS STEP-2

Perform self-diagnosis STEP-2. Refer to

HAC-27, "Diagnosis Description"

, see No. 1 to 3.

25 or

−

25 is displayed.

YES

>> Go to Diagnosis Procedure. Refer to

HAC-83, "Diagnosis Procedure"

.

NO

>> END.

Diagnosis Procedure

INFOID:0000000000954670

1.

CHECK VOLTAGE BETWEEN SUNLOAD SENSOR AND GROUND

1.

Disconnect sunload sensor connector.

2.

Turn ignition switch ON.

3.

Check voltage between sunload sensor harness connector M74 terminal 1 and ground.

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