Nissan Altima HL32 Hybrid. Manual - part 501

MODE DOOR CONTROL SYSTEM

HAC-25

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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LAN System Circuit

Mode Door Control Specification

Mode position can be selected manually by pressing MODE switch

or DEF switch of the controller. This enables to fix a mode position.

Automatic control by auto amp. Pressing AUTO switch allows auto-

matic control by auto amp. During the automatic control of mode

position, a mode door position (VENT, B/L, FOOT, or D/F) is selected

based on a target air mix door opening angle and sunload depending

on a temperature calculated by auto amp. In addition, D/F is

selected to prevent windshield fogging only when ambient tempera-

ture is extremely low with mode position FOOT.

JPIIA0009GB

RHA384HA

HAC-26

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AIR MIX DOOR CONTROL SYSTEM

AIR MIX DOOR CONTROL SYSTEM

Description

INFOID:0000000004215305

SYSTEM DESCRIPTION

Component Parts

Air mix door control system components are:

• Auto amp.

• Air mix door motor (LCU)

• A/C LAN system (PBR built-in mode door motor, air mix door motor and intake door motor)

• In-vehicle sensor

• Ambient sensor

• Sunload sensor

• Intake sensor

System Operation

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

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

LCU.

The air mix door motors, mode door motor 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 are 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 are returned to

the auto amp.

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AIR MIX DOOR CONTROL SYSTEM

HAC-27

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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LAN System Circuit

Air Mix Door Control Specification

When ignition switch is ON, Auto amp. continuously and automati-

cally controls temperatures regardless of air conditioner operational

condition. When setting a target temperature with temperature con-

trol dial, Auto amp. corrects the set temperature and decides a target

air mix door opening angle. Auto amp. controls air mix door accord-

ing to the target air mix door opening angle and current air mix door

opening angle in order to keep an optimum air mix door opening

angle. When a temperature is set at 18

°C (60°F), air mix door is

fixed at full cold, and when a temperature is set at 32

°C (90°F), it is

set at full hot.

JPIIA0009GB

RHA457H

HAC-28

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

INTAKE DOOR CONTROL SYSTEM

INTAKE DOOR CONTROL SYSTEM

Description

INFOID:0000000004215306

SYSTEM DESCRIPTION

Component Parts

Intake door control system components are:

• Auto amp.

• Intake door motor (LCU)

• A/C LAN system (PBR built-in mode door motor, air mix door motor and intake door motor)

• In-vehicle sensor

• Ambient sensor

• Sunload sensor

• Intake sensor

System Operation

The intake door control determines intake door position based on the ambient temperature, the intake air tem-

perature and the in-vehicle temperature. When shifting mode position D/F, when the DEF or OFF switches are

pressed, or when A/C switch is OFF, the auto amp. sets the intake door at the FRE position.

LAN System Circuit

Intake Door Control Specification

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