Infiniti EX35. Manual - part 926

 

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Infiniti EX35. Manual - part 926

 

 

HAC-100

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

INTAKE SENSOR

INTAKE SENSOR

Description

INFOID:0000000003545638

Intake Sensor
The intake sensor (2) is located on the evaporator. It converts air
temperature after it passes through the evaporator (1) into a resis-
tance value which is then input to the unified meter and A/C amp.

Intake Sensor Circuit

Component Function Check

INFOID:0000000003545639

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.

24 or 

24 is displayed.

YES

>> Go to Diagnosis Procedure. Refer to 

HAC-100, "Diagnosis Procedure"

.

NO

>> END.

Diagnosis Procedure

INFOID:0000000003545640

1.

CHECK VOLTAGE BETWEEN INTAKE SENSOR AND GROUND

1.

Disconnect intake sensor connector.

2.

Turn ignition switch ON.

3.

Check voltage between intake sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

JPIIA0650ZZ

RJIA4104E

(+)

(

)

Voltage

Intake sensor

Connector

Terminal

M77

1

Ground

Approx. 5 V

INTAKE SENSOR

HAC-101

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

2.

CHECK CIRCUIT CONTINUITY BETWEEN INTAKE 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 intake sensor harness connector and unified meter and A/C amp. harness con-
nector.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK INTAKE SENSOR

Check intake sensor. Refer to 

HAC-101, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace unified meter and A/C amp.

NO

>> Replace intake sensor.

4.

CHECK CIRCUIT CONTINUITY BETWEEN INTAKE 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 intake sensor harness connector and unified meter and A/C amp. harness con-
nector.

4.

Check continuity between intake 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:0000000003545641

1.

CHECK INTAKE SENSOR

1.

Turn ignition switch OFF.

2.

Disconnect intake sensor connector.

3.

Check resistance between intake sensor terminals.

Intake sensor

Unified meter and A/C amp.

Continuity

Connector

Terminal

Connector

Terminal

M77

2

M67

59

Existed

Intake sensor

Unified meter and A/C amp.

Continuity

Connector

Terminal

Connector

Terminal

M77

1

M67

43

Existed

Intake sensor

Continuity

Connector

Terminal

M77

1

Ground

Not existed

HAC-102

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

INTAKE SENSOR

Is the inspection result normal?

YES

>> END.

NO

>> Replace intake sensor.

Terminal

Condition

Resistance k

Temperature 

°

C (

°

F)

1

2

15 (5)

12.34

10 (14)

9.62

5 (23)

7.56

0 (32)

6.00

5 (41)

4.80

10 (50)

3.87

15 (59)

3.15

20 (68)

2.57

25 (77)

2.12

30 (86)

1.76

35 (95)

1.47

40 (104)

1.23

45 (113)

1.04

POWER SUPPLY AND GROUND CIRCUIT FOR AUTO AMP.

HAC-103

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

POWER SUPPLY AND GROUND CIRCUIT FOR AUTO AMP.

Description

INFOID:0000000003545642

COMPONENT DESCRIPTION

Unified Meter and A/C Amp. (Automatic Amplifier)

The unified meter and A/C amp. (1) has a built-in microcomputer
which processes information sent from various sensors needed for
air conditioner operation. The air mix door motor(s), mode door
motor, intake door motor, blower motor and compressor are then
controlled.
When the various switches and temperature control dial are oper-
ated, data is input to the unified meter and A/C amp. from the AV
control unit using CAN communication.
Self-diagnosis functions are also built into unified meter and A/C
amp. to provide quick check of malfunctions in the auto air condi-
tioner system.

Power Supply and Ground Circuit for Unified Meter and A/C Amp.

Potentio Temperature Control (PTC)

The PTC (1) is built into the preset switch. It can be set at an interval of 0.5

°

C (1.0

°

F) in the 18

°

C (60

°

F) to

32

°

C (90

°

F) temperature range by turning temperature control dial. The set temperature is displayed.

Without left and right ventilation temperature separately system

With left and right ventilation temperature separately system

JSIIA1072ZZ

RJIA4049E

JSIIA0135ZZ

JSIIA0020GB

 

 

 

 

 

 

 

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