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Nissan Leaf. Manual - part 761

DIAGNOSIS SYSTEM (A/C AUTO AMP.)

HAC-47

< SYSTEM DESCRIPTION >

[AUTO A/C (WITH HEAT PUMP)]

HAC

DIAGNOSIS SYSTEM (A/C AUTO AMP.)

Description

INFOID:0000000010121769

Air conditioning system performs self-diagnosis, operation check, function diagnosis, and various settings

using diagnosis function of each control unit.

CONSULT Function

INFOID:0000000010121770

APPLICABLE ITEM

CONSULT performs the following functions via communication with the A/C auto amp.

ECU IDENTIFICATION INFORMATION

Part number of A/C auto amp. can be checked.

SELF DIAGNOSTIC RESULT

Diagnosis results that are judged by A/C auto amp. can be checked.

HAC-56, "DTC Index"

DATA MONITOR

Communication signals of A/C auto amp. can be checked.

NOTE:

The following table includes information (items) inapplicable to this vehicle. For information (items) applicable

to this vehicle, refer to CONSULT display items.

Display Item List

Unit name

Diagnosis item

(CONSULT display)

A/C auto amplifier

HVAC

Self Diagnostic Result

Data Monitor

Work support

Active Test

AV control unit

Self Diagnostic Result

Data Monitor

Active Test

VCM

EV/HEV

Self Diagnostic Result

Data Monitor

Diagnosis mode

FUNCTION DESCRIPTION

ECU identification information

Displays part number of A/C auto amp.

Self Diagnostic Result

Displays diagnosis results that are judged by A/C auto amp.

Data Monitor

Displays I/O signals of A/C auto amp.

Active Test

Forces supply of the signals which operate each load from the A/C auto amp.

Work support

Changes the settings of various setting functions and performs automatic adjustment of
components.

Configuration

• Read and save the vehicle specification.
• Write the vehicle specification when replacing A/C auto amp.

Monitor item [STATUS or UNIT]

DESCRIPTION

AMB TEMP SEN

[

°C/°F] Value of ambient sensor detection value (voltage), converted to ambient temperature

IN-VEH TEMP

[

°C/°F] Value of in-vehicle sensor detection value (voltage), converted to interior temperature

INT TEMP SEN

[

°C/°F] Value of intake sensor detection value (voltage), converted to intake temperature

SUNLOAD SEN

[W/m

] Value of sunload sensor detection value (voltage), converted to sunload

AMB SEN CAL

[

°C/°F] Value of ambient temperature calculated by A/C auto amp.

IN-VEH CAL

[

°C/°F] Value of interior temperature calculated by A/C auto amp.

HAC-48

< SYSTEM DESCRIPTION >

[AUTO A/C (WITH HEAT PUMP)]

DIAGNOSIS SYSTEM (A/C AUTO AMP.)

*: “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

] 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.

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.

DIAGNOSIS SYSTEM (A/C AUTO AMP.)

HAC-49

< SYSTEM DESCRIPTION >

[AUTO A/C (WITH HEAT PUMP)]

HAC

*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

B/L

FOOT

D/F

DEF

Intake door motor position

REC

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

Heater

Cooling

Blower fan motor (applied voltage)

10.5 V

8.5 V

10.5 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

30%

Cooling fan operating rate

50%

70%

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)"

HAC-50

< ECU DIAGNOSIS INFORMATION >

[AUTO A/C (WITH HEAT PUMP)]

A/C AUTO AMP.

ECU DIAGNOSIS INFORMATION

A/C AUTO AMP.

Reference Value

INFOID:0000000010121771

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)

A/C switch: OFF (A/C switch indi-
cator lamp: OFF)

Off

FAN REQ SIG

Power switch READY

Blower motor: ON

Blower motor: OFF

Off

FAN DUTY

Power switch READY

Blower motor: ON

4 – 13

Blower motor: OFF

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 %)

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