Nissan Leaf. Instruction — 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: Instruction 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.
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