Nissan Leaf. Manual - part 810

 

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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.

HAC-83, "Temperature Setting 

Trimmer"

REC MEMORY SET

REC memory function setting can be performed.

HAC-83, "Inlet Port Memory 

Function (REC)"

FRE MEMORY SET

FRE memory function setting can be performed.

HAC-84, "Inlet Port Memory 

Function (FRE)"

BLOW SET

In FOOT mode, the air blow to DEF can be turned ON/OFF.

HAC-84, "Foot Position Set-

ting Trimmer"

Door Motor Starting Position Re-
set

Zero position reset of air mix door motor and mode door motor 
can be performed.

HAC-86, "Work Procedure"

TARGET MAX RPM ADJ AT 
PRE-CLIMATE

Compressor MAX rotation in Pre Air Condition is compensated.

HAC-85, "Setting of Compres-

sor Maximum Rotation Speed 

During Pre Air Conditioning"

TARGET MAX RPM ADJ AT IDL

Compressor MAX rotation when vehicle stopped is compensat-
ed.

HAC-85, "Setting of Compres-

sor Maximum Rotation Speed 

During Idling"

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.

HAC-84, "Compressor Opera-
tion Setting at Defroster Mode 

(Timer/Remote Climate Con-

trol)"

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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