Nissan Frontier D40. Manual - part 727

 

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Nissan Frontier D40. Manual - part 727

 

 

MANUAL AIR CONDITIONER SYSTEM

HAC-11

< FUNCTION DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

MANUAL AIR CONDITIONER SYSTEM

Control System Diagram

INFOID:0000000005275866

CONTROL SYSTEM

The control system consists of input sensors, switches, the front air control (microcomputer) and outputs.
The relationship of these components is shown in the figure below:

Control System Description

INFOID:0000000005275867

CONTROL OPERATION

Front air control

AWIIA1231GB

AWIIA1229ZZ

HAC-12

< FUNCTION DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

MANUAL AIR CONDITIONER SYSTEM

TEMPERATURE CONTROL DIAL (TEMPERATURE CONTROL)

Increases or decreases the set temperature.

RECIRCULATION (

) SWITCH

• When REC switch is ON, REC switch indicator turns ON, and air inlet is set to REC.
• When REC switch is turned OFF, or when compressor is turned from ON to OFF, REC switch is automati-

cally turned OFF. REC mode can be re-entered by pressing REC switch again.

• REC switch is not operated when DEF switch is turned ON, or at the D/F or FOOT position.

DEFROSTER (

) SWITCH

Positions the air outlet doors to the defrost position. Also positions the intake doors to the outside air position.

REAR WINDOW DEFOGGER SWITCH

When switch is ON, rear window is defogged.

OFF SWITCH (BLOWER SPEED DIAL)

The compressor and blower are OFF.

A/C SWITCH 

The compressor is ON or OFF.
(Pressing the A/C switch will turn off the A/C switch and compressor.)

MODE SWITCHES

Controls the air discharge outlets.

FRONT BLOWER CONTROL DIAL

Manually controls the blower speed.

MAGNET CLUTCH CONTROL

When the A/C switch is pressed, or the mode switch is pressed to the DEF or D/F position, the front air control
outputs a compressor ON signal to BCM.
The BCM then sends a compressor ON signal to ECM, via CAN communication line.
ECM judges whether compressor can be turned ON, based on each sensor status (refrigerant pressure sen-
sor signal, throttle angle sensor, etc.). If it judges compressor can be turned ON, it sends compressor ON sig-
nal to IPDM E/R, via CAN communication line.
Upon receipt of compressor ON signal from ECM, IPDM E/R turns air conditioner relay ON to operate com-
pressor.

Discharge Air Flow

INFOID:0000000005275868

WJIA1293E

MANUAL AIR CONDITIONER SYSTEM

HAC-13

< FUNCTION DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Switches And Their Control Function

INFOID:0000000005275869

SWITCHES AND THEIR CONTROL FUNCTION

Mode door position

Air outlet/distribution

Vent

Foot

Defroster

95%

5%

60%

40%

20%

55%

25%

15%

50%

35%

7%

15%

78%

Airflow always present at driver and passenger side demisters

WJIA1296E

AWIIA0271GB

HAC-14

< FUNCTION DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

MANUAL AIR CONDITIONER SYSTEM

AWIIA1230GB

 

 

 

 

 

 

 

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