HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) > Auto A/C Control Module I/O Signal

ELECTRICAL SPECIFICATION

1. GASOLINE ENGINE MODEL

Terminal No.

Content

Measuring condition

Standard

1

Mode actuator #4

Actuator active

8 V or more

2

Mode actuator #3

Actuator active

8 V or more

3

Mode actuator #2

Actuator active

8 V or more

4

Mode actuator #1

Actuator active

8 V or more

6

Intake door actuator (external air)

External air condition

1 V or less

7

Intake door actuator (MIX)

MIX condition

1 V or less

8

Intake door actuator (internal air)

Internal air condition

1 V or less

9

Blower fan ON signal

When blower fan is turned to ON.

1 V or less

10

Rr defogger operation signal input

When Rr defogger is active

10 V or more

11

A/C cut signal

When A/C is cut

1 V or less

14

Sensor GND

Always

1 V or less

15

ACC power supply

ACC ON

Battery voltage

16

Sunload sensor

When exposed to sunlight

1 — 4 V

17

RECIRC sensor

Ignition switch ON

25°C: 2.5 V

18

Evaporator sensor

Changes according to the temperature after passing through the evaporator

1 — 4.5 V

19

CAN Lo

Unable to measure the voltage for digital signal.

20

CAN Hi

Unable to measure the voltage for digital signal.

25

Air mix actuator #4

Air mix actuator active

8 V or more

26

Air mix actuator #3

Air mix actuator active

8 V or more

27

Air mix actuator #2

Air mix actuator active

8 V or more

28

Air mix actuator #1

Air mix actuator active

8 V or more

31

BATT

Always

Battery voltage

32

IGN

Ignition ON

Battery voltage

34

GND

Always

1 V or less

36

A/C ON signal

When A/C is active

8 V or more

35

ILL−

Illumination ON (measure between 37 — 35)

Battery voltage

37

ILL+

39

Rr defogger switch output

When rear defogger relay is ON

Battery voltage

40

Fan control signal

Ignition switch ON, Blower switch ON

8 V or more

2. DIESEL ENGINE MODEL

Terminal No.

Content

Measuring condition

Standard

1

Mode actuator #4

Actuator active

8 V or more

2

Mode actuator #3

Actuator active

8 V or more

3

Mode actuator #2

Actuator active

8 V or more

4

Mode actuator #1

Actuator active

8 V or more

5

PTC heater 2

PTC heater active

1 V or less

6

Intake door actuator (external air)

External air condition

1 V or less

7

Intake door actuator (MIX)

MIX condition

1 V or less

8

Intake door actuator (internal air)

Internal air condition

1 V or less

9

Blower fan ON signal

When blower fan is turned to ON.

1 V or less

11

A/C cut signal

When A/C is cut

1 V or less

12

Mini PTC heater

PTC heater active

1 V or less

14

Sensor GND

Always

1 V or less

15

ACC power supply

ACC ON

Battery voltage

16

Sunload sensor

When exposed to sunlight

1 — 4 V

17

RECIRC sensor

Ignition switch ON

25°C: 2.5 V

18

Evaporator sensor

Changes according to the temperature after passing through the evaporator

1 — 4.5 V

19

CAN Lo

Unable to measure the voltage for digital signal.

20

CAN Hi

Unable to measure the voltage for digital signal.

25

Air mix actuator #4

Air mix actuator active

8 V or more

26

Air mix actuator #3

Air mix actuator active

8 V or more

27

Air mix actuator #2

Air mix actuator active

8 V or more

28

Air mix actuator #1

Air mix actuator active

8 V or more

29

PTC heater 1

PTC heater active

1 V or less

30

PTC heater 2

PTC heater active

1 V or less

31

BATT

Always

Battery voltage

32

IGN

Ignition ON

Battery voltage

33

Mini PTC heater

PTC heater active

1 V or less

34

GND

Always

1 V or less

35

ILL−

Illumination ON (measure between 37 — 35)

Battery voltage

37

ILL+

38

Compressor speed sensor signal

Compressor is running

Pulse output

39

Rr defogger switch output

When rear defogger relay is ON

Battery voltage

40

Fan control signal

Ignition switch ON, Blower switch ON

8 V or more