Nissan Maxima. Manual - part 734

HAC-112

< SYSTEM DESCRIPTION >

[WITH MONOCHROME DISPLAY]

COMPRESSOR CONTROL FUNCTION

SYSTEM DESCRIPTION

COMPRESSOR CONTROL FUNCTION

Description

INFOID:0000000010051110

PRINCIPLE OF OPERATION

A/C compressor is not activated.

Functional circuit diagram

Functional initial inspection chart

Fail-Safe

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FAIL-SAFE FUNCTION

• If a communication error exists between the A/C auto amp., the AV control unit and the A/C and AV switch

assembly for 30 seconds or longer, air conditioner is controlled under the following conditions:

CAN (1)

: A/C switch signal
: Blower fan motor switch signal

CAN (2)

: A/C compressor request signal

RX

: A/C switch signal
: Fan ON signal
: Defroster signal

AWIIA1119GB

Location

A

B

C

D

CONSULT

ECM DATA MONITOR

Yes

Yes

IPDM E/R DATA MONITOR

Yes

HVAC DATA MONITOR

Yes

Self-diagnosis function

Yes

ACTIVE TEST

Yes

Yes

AUTO ACTIVE TEST

Yes

COMPRESSOR CONTROL FUNCTION

HAC-113

< SYSTEM DESCRIPTION >

[WITH MONOCHROME DISPLAY]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Compressor

: ON

Air outlet

: AUTO

Air inlet

: FRE (

)

Blower fan speed

: AUTO

Set temperature

: Setting before communication error occurs

HAC-114

< SYSTEM DESCRIPTION >

[WITH MONOCHROME DISPLAY]

AUTOMATIC AIR CONDITIONER SYSTEM

AUTOMATIC AIR CONDITIONER SYSTEM

System Diagram

INFOID:0000000010051112

CONTROL SYSTEM

The control system consists of input sensors, switches, the A/C auto amp. (microcomputer) and outputs. The

relationship of these components is as shown in the figure below:

System Description

INFOID:0000000010051113

CONTROL OPERATION

Display

The operation status of the HVAC system is displayed on the screen.

A/C Switch Assembly

AWIIA1120GB

AWIIA1188GB

AUTOMATIC AIR CONDITIONER SYSTEM

HAC-115

< SYSTEM DESCRIPTION >

[WITH MONOCHROME DISPLAY]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

MODE SWITCH

The air discharge outlets are controlled with this switch.

TEMPERATURE CONTROL SWITCH (Driver Side) 

The set temperature is increased or decreased with this switch.

TEMPERATURE CONTROL SWITCH (Passenger Side) 

• The set temperature is increased or decreased with this switch.

• When the temperature control switch is pressed, DUAL mode indicator is turned ON.

AUTO SWITCH 

• The A/C compressor, intake doors, air mix doors, mode doors and blower speed are automatically controlled

so that the in-vehicle temperature will reach, and be maintained at the set temperature selected by the oper-

ator.

• When pressing the AUTO switch, air inlet, air outlet, fan speed, and discharge air temperature are automati-

cally controlled.

DEFROSTER (

) SWITCH

Mode doors are set to the defrost position with this switch. Also, intake doors are set to the outside air position,

and A/C compressor turns ON.

A/C SWITCH

A/C compressor turns ON or OFF with this switch.

(Pressing the A/C switch, when the A/C switch is ON, turns OFF the A/C switch and A/C compressor.)

FAN CONTROL DIAL

The fan speed is manually controlled with this dial. Seven speeds are available for manual control (as shown

on the display screen).

OFF SWITCH

A/C compressor and blower turn OFF, intake doors and the mode doors are automatically controlled.

REAR WINDOW DEFOGGER SWITCH

When indicator is ON, rear window is defogged.

RECIRCULATION (

) SWITCH

• When the REC switch is ON, the REC switch indicator is turned ON, and air inlet is set to REC.

1.

Temperature control switch (driver 
side)

2.

A/C ON/OFF switch

3.

Rear window defogger switch

4.

OFF switch/fan control dial

5.

Fresh air switch

6.

DUAL mode switch

7.

Temperature control switch (pas-
senger side)

8.

Mode switch

9.

Recirculation switch

10. Defroster switch

11. AUTO switch

AWIIA1057ZZ