Nissan Leaf. Manual — part 810
DIAGNOSIS SYSTEM (A/C AUTO AMP.)
HAC-243
< SYSTEM DESCRIPTION >
[AUTO A/C (WITHOUT HEAT PUMP)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
*: “DUTY”is displayed however the voltage is indicated. Or value is not displayed, but unit is (V).
ACTIVE TEST
The signals used to activate each device forcibly supplied from A/C auto amp. operation check of air condi-
tioning system can be performed.
NOTE:
When the active test is performed, the vehicle is set to READY.
HVAC Test
INT TEMP CAL
[
°C/°F] Value of intake temperature calculated by A/C auto amp.
SUNL SEN CAL
[W/m
2
] Value of sunload calculated by A/C auto amp.
COMP REQ SIG
[On/Off] A/C ON signal ON/OFF status
FAN REQ SIG
[On/Off] Blower fan ON signal ON/OFF status
FAN DUTY
*
Target value of voltage (applied voltage) applied to Blower fan motor by A/C auto
amp.
XM
Target discharge air temperature judged by A/C auto amp. according to the temper-
ature setting and the value from each sensor
VEHICLE SPEED
[km/h]
Vehicle speed calculated by A/C auto amp., based on motor speed signal received
from traction motor inverter via EV CAN communication
COMPR RPM
[rpm] Rotation speed of electric compressor
COMPR INPUT POWER SIG
[W] Power consumption value of electric compressor
COMPR IPM TEMP SIG
[
°C/°F] IGBT temperature sensor value on the electric compressor
COMPR INPUT VOLT SIG
[V] Input voltage value of electric compressor
PTC HEATER REQUEST
[%] Operating rate sent to the PTC element heater by the A/C auto amp.
COMP USE PERMIT POWER
[W]
Calculated value of electrical power available to operate the A/C system received
from VCM via EV CAN communication
REFRIGERANT PRE SEN
[Mpa] Refrigerant pressure sensor detection value sent from VCM
FORCED Off SIGNAL
[On/Off] State of input signal to A/C auto amp.
FORCED INTAKE REC SIG
[On/Off] State of input signal to A/C auto amp.
PRE-CLIMATE SIGNAL
[On/Off] State of input signal to A/C auto amp.
HV SPLY/BLOCK CMPL FLAG
[On/Off] State of input signal to A/C auto amp.
PTC CONSUMPTION VOLT
[W] Power consumption value of PTC heater
PTC OUT TEMP SENS
[
°C/°F]
Value of PTC heater outlet air temperature sensor detection value (voltage), convert-
ed to temperature
A/C UNIT TEMP SENS
[
°C/°F]
Value of A/C unit case temperature sensor detection value (voltage), converted to
temperature
CMP DISCHR TEMP SENS
[
°C/°F]
Temperature of compressor discharge refrigerant temperature sensor, input from
heat pump control unit
CMP SUCTN TEMP SENS
[
°C/°F]
Temperature of compressor suction refrigerant temperature sensor, input from heat
pump control unit
2-WAY VALVE STATE
[On/Off]
Operation status of refrigerant passage switching 2-way valve, input from heat pump
control unit
3-WAY VALVE STATE
[On/Off]
Operation status of refrigerant passage switching 3-way valve, input from heat pump
control unit
Monitor item [STATUS or UNIT]
DESCRIPTION
Test item
DESCRIPTION
ALL SEG
ALL switch indicator indications are turned ON.
HVAC TEST
The operation check of A/C system can be performed by selecting the mode. Refer to the
following table for the conditions of each mode.
HAC-244
< SYSTEM DESCRIPTION >
[AUTO A/C (WITHOUT HEAT PUMP)]
DIAGNOSIS SYSTEM (A/C AUTO AMP.)
*In FOOT mode, position of mode door motor (driver side) is set to the status that is selected for blow setting
to DEF. Refer to
HAC-84, "Foot Position Setting Trimmer"
.
WORK SUPPORT
Setting change of various setting functions and automatic adjustment of components can be performed.
Test item
Mode 1
Mode 2
Mode 3
Mode 4
Mode 5
Mode 6
Mode 7
Mode door motor position
VENT
VENT
B/L
FOOT
*
FOOT
*
D/F
DEF
Intake door motor position
REC
REC
REC
FRE
FRE
FRE
FRE
Air mix door motor position
FULL
COLD
FULL
COLD
FULL
COLD
FULL
HOT
FULL
HOT
FULL
HOT
FULL HOT
A/C operation mode
Cooling
Cooling
Cooling
Heater
Heater
Heater
Cooling
Blower fan motor (applied voltage)
10.5 V
8.5 V
10.5 V
8.5 V
8.5 V
8.5 V
12 V
Electric compressor (rpm)
ON (1500) ON (2000) ON (3000) ON (2000) ON (2000)
OFF (0)
ON (2000)
PTC heater operating rate
0%
0%
0%
30%
0%
30%
30%
Cooling fan operating rate
50%
50%
50%
70%
70%
0%
50%
Work item
DESCRIPTION
Refer to
TEMP SET CORRECT
If the temperature experienced by the passenger is different
than the discharge air temperature controlled by the tempera-
ture setting, the A/C auto amplifier control temperature can be
corrected with regards to the temperature setting.
REC MEMORY SET
REC memory function setting can be performed.
FRE MEMORY SET
FRE memory function setting can be performed.
BLOW SET
In FOOT mode, the air blow to DEF can be turned ON/OFF.
Door Motor Starting Position Re-
set
Zero position reset of air mix door motor and mode door motor
can be performed.
TARGET MAX RPM ADJ AT
PRE-CLIMATE
Compressor MAX rotation in Pre Air Condition is compensated.
TARGET MAX RPM ADJ AT IDL
Compressor MAX rotation when vehicle stopped is compensat-
ed.
COMP OPRT SET AT DEF
MODE (TIM/RMT CLIMT CONT)
For A/C-heater timer and remote climate control, the setting of
electric compressor operation during DEF mode can be
changed.
A/C AUTO AMP.
HAC-245
< 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
ECU DIAGNOSIS INFORMATION
A/C AUTO AMP.
Reference Value
INFOID:0000000010121959
CONSULT DATA MONITOR REFERENCE VALUES
NOTE:
The following table includes information (items) inapplicable to this vehicle. For information (items) applicable
to this vehicle, refer to CONSULT display items.
Monitor item
Condition
Value/Status
AMB TEMP SEN
Power switch ON
Equivalent to ambient temperature
IN-VEH TEMP
Power switch ON
Equivalent to in-vehicle tempera-
ture
INT TEMP SEN
Power switch ON
Equivalent to evaporator fin temper-
ature
SUNLOAD SEN
Power switch ON
Equivalent to sunload amount
AMB SEN CAL
Power switch ON
Equivalent to ambient temperature
IN-VEH CAL
Power switch ON
Equivalent to in-vehicle tempera-
ture
INT TEMP CAL
Power switch ON
Equivalent to evaporator fin temper-
ature
SUNL SEN CAL
Power switch ON
Equivalent to sunload amount
COMP REQ SIG
Power switch READY
A/C switch: ON (A/C switch indi-
cator lamp: ON)
(Electric compressor operating
condition)
On
A/C switch: OFF (A/C switch indi-
cator lamp: OFF)
Off
FAN REQ SIG
Power switch READY
Blower motor: ON
On
Blower motor: OFF
Off
FAN DUTY
*
Power switch READY
Blower motor: ON
4 – 13
Blower motor: OFF
0
XM
Power switch ON
Value according to target air flow
temperature
VEHICLE SPEED
Power switch READY
Equivalent to speedometer reading
(0 - 120 km/h)
COMPR RPM
Power switch READY
A/C switch: ON
(Compressor operation status)
Rotation speed of electric compres-
sor
(0 - 9000 rpm)
COMPR INPUT POWER SIG
Power switch READY
A/C switch: ON
(Compressor operation status)
Power consumption value of elec-
tric compressor
(0 - 6375 W)
COMPR IPM TEMP SIG
Power switch READY
A/C switch: ON
(Compressor operation status)
IGBT temperature sensor value in
electric compressor
(-30
°C - 225°C)
COMPR INPUT VOLT SIG
Power switch READY
A/C switch: ON
(Compressor operation status)
Input voltage value of electric com-
pressor
(100 - 610V)
PTC HEATER REQUEST
Power switch READY
Heater FULL HOT operation
Operating rate sent to the PTC ele-
ment heater by the A/C auto amp.
(0 - 100 %)
HAC-246
< ECU DIAGNOSIS INFORMATION >
[AUTO A/C (WITHOUT HEAT PUMP)]
A/C AUTO AMP.
*: “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
Monitor item
Condition
Value/Status
JMIIA0690ZZ
Terminal No.
(Wire color)
Item
Test condition
Standard
+
−
Signal name
Input/
Output
1
(V)
10
(B)
REC
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
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