Nissan Altima HL32 Hybrid. Manual - part 497

 

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Nissan Altima HL32 Hybrid. Manual - part 497

 

 

AUTOMATIC AIR CONDITIONER SYSTEM

HAC-9

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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MODE Switch

The air discharge outlets is controlled with this switch.

Temperature Control Dial (Potentio Temperature Control) (Driver Side) 

The set temperature is increased or decreased with this dial.

Temperature Control Dial (Potentio Temperature Control) (Passenger Side) 

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

• When the temperature control dial is turned, the DUAL switch indicator will automatically illuminate.

AUTO Switch 

• The compressor, intake door, 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 operator.

• When pressing AUTO switch, air inlet, air outlet, fan speed, and discharge air temperature are automatically

controlled.

Defroster (DEF) Switch

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

and compressor turns ON.

A/C Switch

Compressor is ON or OFF with this switch.

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

FAN Control Dial

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

shown on the LEDs).

OFF Switch

Compressor and blower are OFF, intake doors and the mode doors are automatically controlled.

Rear Window Defogger Switch

When illumination is ON, rear window is defogged.

Recirculation (REC) Switch

• When recirculation (REC) switch is ON, REC LED turns ON, and air inlet is fixed to REC.

• When press recirculation (REC) switch again, REC LED turns OFF, and then, automatic control mode is

entered.

• When REC LED is turned OFF, shifting mode position to D/F or DEF, or when compressor is turned from ON

to OFF, recirculation (REC) switch is automatically turned OFF (fixed to automatic control mode). REC mode

can be re-entered by pressing recirculation (REC) switch again, and then compressor is turned ON. (Except

D/F or DEF position)

DUAL Switch

• When the DUAL switch LED is turned ON, the driver side and passenger side, temperature can each be set

independently.

• When the DUAL switch LED is not turned OFF, the driver side outlet and setting temperature is applied to

both sides.

HAC-10

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AUTOMATIC AIR CONDITIONER SYSTEM

DISCHARGE AIR FLOW

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AUTOMATIC AIR CONDITIONER SYSTEM

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[AUTOMATIC AIR CONDITIONER]

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SWITCHES AND THEIR CONTROL FUNCTION

AIR CONDITIONER LAN CONTROL SYSTEM

The LAN (Local Area Network) system consists of auto amp., mode door motor, air mix door motors and

intake door motor.

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HAC-12

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AUTOMATIC AIR CONDITIONER SYSTEM

A configuration of these components is shown in the figure below.

SYSTEM CONSTRUCTION

A small network is constructed between the auto amp., mode door motor, air mix door motors and intake door

motor. The auto amp. and motors are connected by data transmission lines and motor power supply lines. The

LAN network is built through the ground circuits of each door motor.

Addresses, motor opening angle signals, motor stop signals and error checking messages are all transmitted

through the data transmission lines connecting the auto amp. and each door motor.

The following functions are contained in LCUs built into the mode door motor, the air mix door motors and the

intake door motor.

• Address

• Motor opening angle signals

• Data transmission

• Motor stop and drive decision

• Opening angle sensor (PBR function)

• Comparison

• Decision (Auto amp. indicated value and motor opening angle comparison)

Operation

The auto amp. receives data from each of the sensors. The auto amp. sends mode door, air mix door and

intake door opening angle data to the mode door motor LCU, air mix door motor LCUs and intake door motor

LCU.

The mode door motor, air mix door motors and intake door motor read their respective signals according to the

address signal. Opening angle indication signals received from the auto amp. and each of the motor position

sensors is compared by the LCUs in each door motor with the existing decision and opening angles. Subse-

quently, HOT/COLD, DEF/VENT and FRE/REC operation is selected. The new selection data is returned to

the auto amp.

Transmission Data and Transmission Order

Auto amp. data is transmitted consecutively to each of the doors motor following the form shown in the figure

below.

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