Nissan Maxima. Instruction — part 710
HAC-16
< SYSTEM DESCRIPTION >
[WITH COLOR DISPLAY]
MODE DOOR CONTROL SYSTEM
MODE DOOR CONTROL SYSTEM
System Diagram
INFOID:0000000010050952
System Description
INFOID:0000000010050953
The mode door is automatically controlled by the temperature setting, ambient temperature, in-vehicle temper-
ature, intake temperature and amount of sunload.
SYSTEM OPERATION
• The A/C auto amp. receives data from each of the sensors.
• The A/C auto amp. sends the air mix door, the mode door and the intake door opening angle data to the air
mix door motor LCU(s), the mode door motor LCU and the intake door motor LCU.
• The air mix door motor(s), the mode door motor and the intake door motor read their respective signals
according to the address signal. Opening angle indication signals received from the A/C auto amp. and each
of the motor position sensors, are compared by the LCUs in each door motor with the existing decision and
opening angles.
• Next, HOT/COLD, DEF/VENT or FRE/REC operation is selected. The newly selected data is returned to the
A/C auto amp.
Door Motor Circuit
Mode Door Control Specification
AWIIA1377GB
AWIIA1066GB
MODE DOOR CONTROL SYSTEM
HAC-17
< SYSTEM DESCRIPTION >
[WITH COLOR DISPLAY]
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Mode position can be selected instructionly by pressing the MODE
switch or the DEF switch on the A/C and AV switch assembly. Press-
ing the AUTO switch allows automatic control by the A/C auto amp.
During the automatic control of a mode position, a mode door posi-
tion (VENT, B/L, FOOT, or D/F) is selected based on a target air mix
door opening angle and sunload sensor, calculated by the A/C auto
amp. In addition, the D/F is selected to prevent windshield fogging
only when ambient temperature is extremely low.
AWIIA1183GB
HAC-18
< SYSTEM DESCRIPTION >
[WITH COLOR DISPLAY]
AIR MIX DOOR CONTROL SYSTEM
AIR MIX DOOR CONTROL SYSTEM
System Diagram
INFOID:0000000010050954
System Description
INFOID:0000000010050955
The air mix doors are automatically controlled so that in-vehicle temperature is maintained at a predetermined
value by the temperature setting, ambient temperature, intake temperature and amount of sunload.
SYSTEM OPERATION
• The A/C auto amp. receives data from each of the sensors.
• The A/C auto amp. sends air mix door, the mode door and the intake door opening angle data to the air mix
door motor LCU(s), the mode door motor LCU and the intake door motor LCU.
• The air mix door motor(s), the mode door motor and the intake door motor read their respective signals
according to the address signal. Opening angle indication signals received from the A/C auto amp. and each
of the motor position sensors are compared by the LCUs in each door motor with the existing decision and
opening angles.
• Next, HOT/COLD, DEF/VENT or FRE/REC operation is selected. The newly selected data is returned to the
A/C auto amp.
Door Motor Circuit
Air Mix Door Control Specification
AWIIA1101GB
AWIIA1066GB
AIR MIX DOOR CONTROL SYSTEM
HAC-19
< SYSTEM DESCRIPTION >
[WITH COLOR DISPLAY]
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When ignition switch is ON, the A/C auto amp. continuously and
automatically controls temperatures, regardless of air conditioner
operational condition. When setting a target temperature with the
temperature control switch, the A/C auto amp. corrects the set tem-
perature and decides a target air mix door opening angle. The A/C
auto amp. controls the air mix door according, to the target air mix
door opening angle and the current air mix door opening angle,
keeping an optimum air mix door opening angle. When the tempera-
ture is set at 18
°C (60°F), air mix door is set on full-cold, and when
the temperature is set at 32
°C (90°F), it is set to full-hot.
JPIIA0633GB
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