Infiniti EX35. Manual - part 925

HAC-96

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

IN-VEHICLE SENSOR

Is the inspection result normal?

YES

>> Replace unified meter and A/C amp.

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000003545633

1.

CHECK IN-VEHICLE SENSOR

1.

Turn ignition switch OFF.

2.

Disconnect in-vehicle sensor connector. Refer to 

VTL-27, "Exploded View"

.

3.

Check resistance between in-vehicle sensor terminals.

Is the inspection result normal?

YES

>> END.

NO

>> Replace in-vehicle sensor.

In-vehicle sensor

—

Continuity

Connector

Terminal

M61

1

Ground

Not existed

Terminal

Condition

Resistance k

Ω

Temperature 

°

C (

°

F)

1

2

−

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

SUNLOAD SENSOR

HAC-97

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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HAC

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SUNLOAD SENSOR

Description

INFOID:0000000003545634

COMPONENT DESCRIPTION

Sunload Sensor

The sunload sensor (1) is located on the driver’s side front defroster
grille. 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 unified meter and A/C amp.

Sunload Sensor Circuit

SUNLOAD INPUT PROCESS

The unified meter and A/C amp. also equips a processing circuit which averages the variations in detected
sunload over a period of time. This prevents drastic swings in the air temperature control 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 varies 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 air temperature control system operation. On the
other hand, shortly after entering a long tunnel, the system recognizes the change in sunload, and the system
reacts accordingly.

Component Function Check

INFOID:0000000003545635

1.

PERFORM SELF-DIAGNOSIS STEP-2

Perform self-diagnosis STEP-2. Refer to 

HAC-57, "WITHOUT LEFT AND RIGHT VENTILATION TEMPERA-

TURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"

 (Without left and right ventilation tempera-

ture separately control system) or 

HAC-63, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE

SEPARATELY CONTROL SYSTEM : Diagnosis Description"

 (With left and right ventilation temperature sepa-

rately control system), see Nos. 1 to 2.

25 or 

−

25 is displayed.

YES

>> Go to Diagnosis Procedure. Refer to 

HAC-97, "Diagnosis Procedure"

.

NO

>> END.

Diagnosis Procedure

INFOID:0000000003545636

1.

CHECK VOLTAGE BETWEEN SUNLOAD SENSOR AND GROUND

1.

Disconnect sunload sensor connector.

2.

Turn ignition switch ON.

JPIIA0647ZZ

RJIA4099E

HAC-98

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

SUNLOAD SENSOR

3.

Check voltage between sunload sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND UNIFIED METER AND A/C AMP.

1.

Turn ignition switch OFF.

2.

Disconnect unified meter and A/C amp. connector.

3.

Check continuity between sunload sensor harness connector and unified meter and A/C amp. harness
connector.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK SUNLOAD SENSOR

1.

Reconnect sunload sensor connector and unified meter and A/C amp. connector.

2.

Check sunload sensor. Refer to 

HAC-98, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace unified meter and A/C amp.

NO

>> Replace sunload sensor.

4.

CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND UNIFIED METER AND A/C AMP.

1.

Turn ignition switch OFF.

2.

Disconnect unified meter and A/C amp. connector.

3.

Check continuity between sunload sensor harness connector and unified meter and A/C amp. harness
connector.

4.

Check continuity between sunload sensor harness connector and ground.

Is the inspection result normal?

YES

>> Replace unified meter and A/C amp.

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000003545637

1.

CHECK SUNLOAD SENSOR

1.

Turn ignition switch ON.

2.

Check voltage between unified meter and A/C amp. harness connector and ground.

(+)

(

−

)

Voltage

Sunload sensor

—

Connector

Terminal

M46

1

Ground

Approx. 5 V

Sunload sensor

Unified meter and A/C amp.

Continuity

Connector

Terminal

Connector

Terminal

M46

2

M67

62

Existed

Sunload sensor

Unified meter and A/C amp.

Continuity

Connector

Terminal

Connector

Terminal

M46

1

M67

46

Existed

Sunload sensor

—

Continuity

Connector

Terminal

M46

1

Ground

Not existed

SUNLOAD SENSOR

HAC-99

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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NOTE:
Select a place where sunshine directly on it when checking sunload sensor.

Is the inspection result normal?

YES

>> END.

NO

>> Replace sunload sensor.

(+)

(

−

)

Unified meter and A/C amp.

—

Connector

Terminal

M67

46

Ground

SHA930E