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
INFOID:0000000010051111
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
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