Nissan Qashqai (2007-2010). Manual — part 915

HAC-20

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AUTOMATIC AIR CONDITIONER SYSTEM

OPENING ANGLE:

• Data that shows the indicated door opening angle of each door motor.

ERROR CHECK:

• In this procedure, transmitted and received data is checked for errors. Error data are then compiled. The

error check prevents corrupted data from being used by the mode door motor, the high-level ventilator door
motor, the air mix door motors and the intake door motor. Error data can be related to the following symp-
toms.

- Malfunction of electrical frequency
- Poor electrical connections
- Signal leakage from transmission lines
- Signal level fluctuation

STOP SIGNAL:

• At the end of each transmission, a stop operation, in-operation, or internal malfunction message is delivered

to the auto amp. This completes one data transmission and control cycle.

AIR MIX DOOR CONTROL (AUTOMATIC TEMPERATURE CONTROL)

The air mix doors are automatically controlled so that in-vehicle temperature is maintained at a predetermined
value by the temperature setting, ambient temperature, in-vehicle temperature and amount of sunload.

FAN SPEED CONTROL

Blower speed is automatically controlled by the temperature setting, ambient temperature, in-vehicle tempera-
ture, intake temperature, amount of sunload and air mix door position.
With pressing AUTO switch, the blower motor starts to gradually increase air flow volume.
When engine coolant temperature is low, the blower motor operation is delayed to prevent cool air from flow-
ing.

INTAKE DOOR CONTROL

The intake doors are automatically controlled by the temperature setting, ambient temperature, in-vehicle tem-
perature, intake temperature, amount of sunload and ON/OFF operation of the compressor.

MODE DOOR CONTROL

The mode door is automatically controlled by the temperature setting, ambient temperature, in-vehicle temper-
ature, intake temperature and amount of sunload.

HIGH-LEVEL VENTILATOR DOOR CONTROL

The high-level ventilator door is controlled by high-level ventilator door switch.

JPIIA0109GB

AUTOMATIC AIR CONDITIONER SYSTEM

HAC-21

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

MAGNET CLUTCH CONTROL

When A/C switch, AUTO switch, DEF/FOOT switch, DEF switch is pressed, auto amp. transmits compressor
ON signal to BCM.
BCM sends compressor ON signal to ECM, via CAN communication.
ECM judges whether compressor can be turned ON, based on each sensor status (refrigerant-pressure sen-
sor signal, throttle angle, etc.). If it judges compressor can be turned ON, it sends compressor ON signal to
IPDM E/R, via CAN communication.
Upon receipt of compressor ON signal from ECM, IPDM E/R turns air conditioner relay ON to operate com-
pressor.
When sending compressor ON signal to IPDM E/R via CAN communication, ECM simultaneously sends com-
pressor feedback signal to combination meter via CAN communication.
Combination meter sends compressor feedback signal to auto amp., then, uses input compressor feedback
signal to control air inlet.

Component Part Location

INFOID:0000000001070366

ENGINE COMPARTMENT

JPIIA0120GB

HAC-22

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AUTOMATIC AIR CONDITIONER SYSTEM

PASSENGER COMPARTMENT

LHD Models

1.

Refrigerant pressure sensor

2.

Compressor

3.

OAT sensor

JPIIA0103GB

AUTOMATIC AIR CONDITIONER SYSTEM

HAC-23

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

RHD Models

1.

Sunload sensor

2.

High-level ventilator door motor

3.

Intake door motor

4.

Air mix door motor (passenger side)

5.

Blower motor

6.

Mode door motor

7.

Fan control amp.

8.

Air mix door motor (driver side)

9.

In-vehicle sensor

10. PTC heater

11.

High-level ventilator switch

12. Auto amp.

13. Intake sensor

JPIIA0104GB