Nissan Leaf. Manual - part 762

A/C AUTO AMP.

HAC-51

< ECU DIAGNOSIS INFORMATION >

[AUTO A/C (WITH HEAT PUMP)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

*: “DUTY” is displayed, but voltage is indicated. Or unit is not displayed but unit is (V).

TERMINAL LAYOUT

INPUT/OUTPUT SIGNAL STANDARD

COMP USE PERMIT POWER

Power switch ON

A/C switch: ON
(Compressor operation status) 

Value calculation for electric com-
pressor consumption power by A/C 
auto amp.
(0 - 12750 W)

REFRIGERANT PRE SEN

Power switch READY

A/C switch: ON
(Compressor operation status) 

Equivalent to refrigerant pressure

FORCED Off SIGNAL

Power switch ON

A/C switch: ON
(Compressor operation status) 

Normal: Off
Received electric compressor stop 
request: On

FORCED INTAKE REC SIG

Power switch READY

When the coolant temperature of 
the high voltage system is high

On

Except the above

Off

PRE-CLIMATE SIGNAL

Power switch ON

When the A/C-Heater Timer or 
remote climate control is operate

On

Except the above

Off

HV SPLY/BLOCK CMPL FLAG

Power switch READY

A/C switch: ON
(Compressor operation status) 

When VCM supplies a high voltage: 
ON
When VCM stops the supply of the 
high voltage: OFF

PTC CONSUMPTION VOLT

Power switch READY

Heater FULL HOT operation

Value calculation for PTC heater 
consumption power by A/C auto 
amp.
(0 - 12750 W)

PTC OUT TEMP SENS

Power switch READY

-30 - 225

°C

A/C UNIT TEMP SENS

Power switch READY

-30 - 225

°C

CMP DISCHR TEMP SENS

Power switch READY

-30 - 225

°C

CMP SUCTN TEMP SENS

Power switch READY

-30 - 225

°C

2-WAY VALVE STATE

Power switch READY

A/C switch: ON, during cooling 
mode

Off

A/C switch: OFF, during heating 
mode

On

3-WAY VALVE STATE

Power switch READY

A/C switch: ON, during cooling 
mode

Off

A/C switch: OFF, during heating 
mode

On

Monitor item

Condition

Value/Status

JMIIA0690ZZ

H

A

C

- 5 2

< ECU DIAGNOSIS INFORMATION >

[AUTO A/C (WITH HEAT PUMP)]

A/C AUTO AMP.

Terminal No.

(Wire color)

Item

Test condition

Standard

+

−

Signal name

Input/

Output

1

(V)

10

(B)

FRE*

1

Intake door motor drive 
signal

Output

• Power switch ON
• Intake switch: REC

→FRE

Battery voltage

• Power switch ON
• Intake switch: FRE

→REC

0 – 1 V

REC*

2

Intake door motor drive 
signal

Output

• Power switch ON
• Intake switch: FRE

→REC

Battery voltage

• Power switch ON
• Intake switch: REC

→FRE

0 – 1 V

2

(R)

10

(B)

MODE 
drive 4

Mode door motor drive 
signal

Output

• Power switch ON
• Immediately after mode 

switch is operated

3

(P)

10

(B)

MODE 
drive 3

4

(BG)

10

(B)

MODE 
drive 2

5

(V)

10

(B)

MODE 
drive 1

6

(BR)

10

(B)

A/MIX 

drive 4

Air mix door motor drive 
signal

Output

• Power switch ON
• Immediately after temper-

ature control switch is op-
erated

7

(GR)

10

(B)

A/MIX 

drive 3

8

(LG)

10

(B)

A/MIX 

drive 2

9

(L)

10

(B)

A/MIX 

drive 1

10

(B)

Ground

Ground

—

Power switch ON

0 – 0.1 V

12

(GR)

10

(B)

Power transistor control signal

Output

• Power switch ON
• Fan speed: Manual speed 

1

15

(W) 

10

(B)

Rear defogger switch

Output

• Power switch ON
• Rear window defogger 

switch OFF

• Power switch ON
• Rear defogger switch is 

pressed.

0 V

16

(LG) 

10

(B)

Steering heater switch signal

Output

• Power switch ON
• Steering heater switch 

OFF

0 V

• Power switch ON
• Steering heater switch is 

pressed.

0.9 V or less

JPIIA1647GB

JPIIA1647GB

ZJIA0863J

JSIIA1668ZZ

A/C AUTO AMP.

HAC-53

< ECU DIAGNOSIS INFORMATION >

[AUTO A/C (WITH HEAT PUMP)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

17

(W) 

10

(B)

PTC heater outlet air temperature 
sensor signal

Input

• Power switch ON
• When air conditioner is 

operating

19

(W) 

10

(B)

Illumination +

Input

• Power switch ON
• Lighting switch 1st

Battery voltage

• Power switch ON
• Lighting switch OFF

0 V

20

(B) 

10

(B)

Illumination –

—

• Power switch ON
• Lighting switch 1st

• Power switch ON
• Lighting switch OFF

0 V

21

(G)

10

(B)

REC*

1

Intake door motor drive 
signal

Output

• Power switch ON
• Intake switch: FRE

→REC

Battery voltage

• Power switch ON
• Intake switch: REC

→FRE

0 – 1 V

FRE*

2

Intake door motor drive 
signal

Output

• Power switch ON
• Intake switch: REC

→FRE

Battery voltage

• Power switch ON
• Intake switch: FRE

→REC

0 – 1 V

22

(V) 

10

(B)

Steering heater relay signal

Output

Power switch ON

0 V

Power switch OFF

Battery voltage

23

(SB) 

10

(B)

Seat heater relay

Output

Power switch ON

0 V

Power switch OFF

Battery voltage

27

(W) 

10

(B)

Sensor power (5 V)

Output Power switch ON

5 V

28

(L)

—

EV CAN-H

Input/

Output

—

—

29

(G)

—

EV CAN-L

Input/

Output

—

—

30

(R)

10

(B)

Sensor ground

—

Power switch ON

0 – 0.1 V

31

(G)

10

(B)

Battery power supply

Input

Power switch OFF

Battery voltage–

32

(Y)

10

(B)

Ignition power

Input

Power switch ON

9.0 V or more

Power switch OFF

6.5 V or less

Terminal No.

(Wire color)

Item

Test condition

Standard

+

−

Signal name

Input/

Output

JSIIA1778ZZ

JSIIA1661ZZ

HAC-54

< ECU DIAGNOSIS INFORMATION >

[AUTO A/C (WITH HEAT PUMP)]

A/C AUTO AMP.

33

(LG)

10

(B)

In-vehicle sensor signal

Input

• Power switch ON
• When air conditioner is 

operating

34

(G)

10

(B)

Intake sensor signal

Input

• Power switch ON
• When air conditioner is 

operating

35

(P)

10

(B)

Sunload sensor signal

Input

• Power switch ON
• When air conditioner is 

operating

36

(GR)

10

(B)

Ambient sensor signal

Input

• Power switch ON
• When air conditioner is 

operating

37

(Y) 

10

(B)

A/C unit case temperature sensor 
signal

Input

• Power switch ON
• When air conditioner is 

operating

38

(SB)

10

(B)

Intake door motor PBR feedback 
signal

Input

• Power switch ON
• Intake switch: REC

0.2 – 0.8 V

• Power switch ON
• Intake switch: FRE

4.2 – 4.8 V

40 

(SB) 

10

(B)

LIN

Input/

Output

• Power switch ON
• When air conditioner is 

operating

Terminal No.

(Wire color)

Item

Test condition

Standard

+

−

Signal name

Input/

Output

JSIIA1662ZZ

JSIIA1663ZZ

JSIIA1664ZZ

JSIIA1665ZZ

JSIIA1778ZZ

JSIIA1667ZZ