Nissan Leaf. Manual - part 811

A/C AUTO AMP.

HAC-247

< ECU DIAGNOSIS INFORMATION >

[AUTO A/C (WITHOUT HEAT PUMP)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

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

14

(L) 

10

(B)

COMP_TX

Output

• Power switch ON
• FULL COLD
• Electric compressor oper-

ation

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

Terminal No.

(Wire color)

Item

Test condition

Standard

+

−

Signal name

Input/

Output

JPIIA1647GB

JPIIA1647GB

ZJIA0863J

JSIIA1658ZZ

JSIIA1668ZZ

HAC-248

< ECU DIAGNOSIS INFORMATION >

[AUTO A/C (WITHOUT HEAT PUMP)]

A/C AUTO AMP.

17

(W) 

10

(B)

Heater water pump feedback sig-
nal

Input

• Power switch ON
• Heater FULL HOT opera-

tion

18

(W) 

10

(B)

COMP_RX

Input

• Power switch ON
• FULL COLD
• Electric compressor oper-

ation

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)

FRE

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

Battery voltage

Terminal No.

(Wire color)

Item

Test condition

Standard

+

−

Signal name

Input/

Output

JSIIA1659ZZ

JSIIA1660ZZ

JSIIA1661ZZ

A/C AUTO AMP.

HAC-249

< ECU DIAGNOSIS INFORMATION >

[AUTO A/C (WITHOUT HEAT PUMP)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

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)

Heater fluid temperature sensor

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 (PTC) 

Input/

Output

• Power switch ON
• Heater FULL HOT opera-

tion

Terminal No.

(Wire color)

Item

Test condition

Standard

+

−

Signal name

Input/

Output

JSIIA1662ZZ

JSIIA1663ZZ

JSIIA1664ZZ

JSIIA1665ZZ

JSIIA1666ZZ

JSIIA1667ZZ

HAC-250

< ECU DIAGNOSIS INFORMATION >

[AUTO A/C (WITHOUT HEAT PUMP)]

A/C AUTO AMP.

Fail-safe

INFOID:0000000010121960

• When the A/C auto amp. detects the conditions shown below, it stops operation of the electric compressor.

• When the electric compressor detects the following conditions, compressor operation is restricted.

Malfunction judgment item

Description

Recovery condition

UART communication malfunction 
(Electric compressor 

→ A/C auto amp.)

A/C auto amp. judges that there is a UART com-
munications malfunction.

UART communications occur normally 
for two seconds or more.

Intake sensor malfunction

Open circuit or short circuit is detected in the in-
take sensor circuit.

Voltage value of intake sensor circuit re-
turns to normal.

Ambient sensor malfunction

Open circuit or short circuit is detected in the am-
bient sensor circuit.

Voltage value of ambient sensor circuit 
returns to normal.

Malfunction judgment 

item

Description

Compressor op-

eration

Recovery condition

Compressor discharge 
temperature overheat

Compressor discharge refrigerant temperature (estimated 
value) is more than 130

°C.

Stopped

Compressor stops for five 
minutes then restarts.

Compressor IPM over-
heat

IPM temperature is more than 125

°C within one minute af-

ter start.

Stopped

IPM temperature drops to 
123

°C or less.

IPM temperature is more than 88

°C at least one minute af-

ter start.

IPM temperature drops to 
86

°C or less.

Compressor voltage 
saturation

Inverter output voltage is 140% or more.

Compressor 
speed is limited.

Inverter output voltage drops 
to under 140%.

Compressor overcur-
rent

Start failed three times because current of 35.1 A or more 
flowed within 90 seconds after start.

Stopped

IGN_OFF

Current of 35.1 A or more flows when compressor is 
stopped.

Compressor overload

DC input is more than 13.5 A.

Compressor 
speed is limited.

DC input drops to 13.5 A or 
less for 15 seconds.

Compressor low-voltage 
malfunction

High voltage is below 230 V.

Stopped

High voltage rises to 235 V 
or more.

Compressor high-volt-
age malfunction

High voltage is more than 420 V.

Stopped

High voltage drops to 415 V 
or less.

Compressor IPM tem-
perature sensor mal-
function

It is judged that an IPM temperature sensor open circuit or 
short circuit is occurred.

Stopped

The IPM temperature sensor 
open circuit or short circuit 
judgment is cancelled.

Compressor shunt sig-
nal offset malfunction

It is judged that an unexpected shunt signal value is oc-
curred.

Stopped

IGN_OFF

Compressor ROM, 
RAM, AD malfunction

A data malfunction is detected in the ROM area or RAM 
area.
It is judged that an unexpected AD value is occurred.

Stopped

IGN_OFF

Compressor discharge 
temperature restriction

Estimated discharge temperature exceeded 110

°C.

Compressor 
speed is limited.

IPM temperature drops to 
108

°C or less.

Compressor IPM tem-
perature restriction

IPM temperature exceeded 83

°C.

Compressor 
speed is limited.

IPM temperature drops to 
81

°C or less.

Compressor low-speed 
overload

Compressor is not operating at command speed.

Compressor 
speed increase

Current is decreased and 
compressor became able to 
operate at command speed.

UART communication 
malfunction (Electric 
compressor 

→ A/C auto 

amp.)

Electric compressor judges that a UART communication 
malfunction is occurred.

Stopped

UART communications oc-
cur normally for two seconds 
or more.