Content .. 807 808 809 810 ..

Nissan Leaf. Manual - part 809

OPERATION

HAC-239

< SYSTEM DESCRIPTION >

[AUTO A/C (WITHOUT HEAT PUMP)]

HAC

OPERATION

Description

INFOID:0000000010121955

• This A/C uses various sensors to detect temperature changes in the interior caused by factors such as

changes in ambient temperature and sunload. When the desired temperature is set, the discharge air tem-

perature, discharge air flow, and inlet/outlet changes are controlled automatically to maintain a constant inte-

rior temperature at all times.

• The air flow volume and switching of air inlets and air outlets can be selected manually without auto function.

While using auto function, it is still possible to select a particular item manually.

• It is possible to use A/C-Heater Timer (Climate Ctrl. Timer) to adjust the interior to a comfortable temperature

before entering the vehicle.

TABLE OF OPERATION CONDITIONS OF A/C SYSTEM FUNCTION OPERATED BY POWER
SWITCH OPERATION

Each of the A/C system functions is operative under the following conditions.

×:Operate —: Does not operate

NOTE:

• Connecting EVSE when the vehicle is in READY state cancels READY state (ready indicator lamp turns

OFF), and power supply position changes to ON. At this time, cooling/heating function of A/C system stops,

and only ventilation function operates. When using cooling/heating function, turn power switch OFF, check

that charging is started, and then turn power switch ON again.

• If cooling/heating function is used during charging, and when charging is completed, cooling/heating function

stops, and only ventilation function operates.

Switch Name and Function

INFOID:0000000010121956

AUTO A/C SYSTEM OPERATIONS AND DISPLAYS

A/C Controller

Power supply position

OFF

ACC

READY

Ventilation function

—

Cooling/heating function

—

(Only during charging)

A/C-Heater Timer (Climate Ctrl.
Timer) function

(Only when EVSE is

connected)

—

Temperature control

Rear window defogger switch

Display

DEF switch

REC switch

Fan control

ON·OFF switch

Heat switch

Mode switch

10. A/C switch

11. AUTO switch

ALIIA0793ZZ

HAC-240

< SYSTEM DESCRIPTION >

[AUTO A/C (WITHOUT HEAT PUMP)]

OPERATION

AUTO switch

• If the switch is pressed while the A/C is stopped, the switch indicator lamp turns ON, “AUTO” appears on the

display, and the A/C system status is as per the following items:

- Air inlet: Automatic control
- Air outlet: Automatic control
- Air flow: Automatic control
- Compressor: Automatic control
• If the switch is pressed while the A/C is operating and “AUTO” is OFF, the switch indicator lamp turns ON,

“AUTO” appears on the display, and all control switches to automatic control.

NOTE:
When air outlet or air flow is manually operated while “AUTO” is indicated on display, “AUTO” indication turns
OFF. However, automatic control continues for functions other than air outlet or air flow.

Mode switch

When each MODE switch is pressed, air outlet is switched and VENT, B/L, FOOT, or D/F can be selected man-
ually.
NOTE:
• Air outlet can be changed when air conditioner system is in the OFF position.
• When MODE switch is pressed while “AUTO” is indicated on display, air outlet automatic control is released

(“AUTO” turns OFF).

DEF switch

DEF mode (switch indicator lamp) changes between ON

⇔OFF each time DEF switch is pressed

• When switch is pressed while air conditioning system is in the ON position, DEF mode turns ON, air condi-

tioning system changes to the following status:

- Air outlet: DEF
- Air flow: Automatic control (If an air flow other than AUTO is selected before pressing DEF switch, blower

fan is manual control.)

- Air inlet: Fresh air intake
- A/C switch: ON
• When DEF mode turns OFF, air conditioner system state returns to the previous state before DEF mode was

selected.

• When switch is pressed while air conditioner system is in the OFF position, air conditioning system turns ON

and changes to the following status:

- Air outlet: DEF
- Air flow: Automatic control
- Air inlet: Fresh air intake
- A/C switch: ON
• When DEF mode turns OFF, entire air conditioner system turns OFF.
NOTE:
When DEF mode is turned ON while “AUTO” is indicated on display, “AUTO” indication turns OFF. However,
air flow automatic control continues. (This operation is excluded when air flow is set before DEF switch is
pressed.)

Temperature control

Operation of this switch increases or decreases the temperature setting in increments of 0.5

° within the range

of 60

° (18°C) to 90° (32°C).

NOTE:
When A/C system is OFF, the set temperature can be selected only while the temperature setting is shown on
the display (several seconds after mode switch is pressed).

Rear window defogger
switch

Refer to

DEF-7, "System Description"

ON/OFF switch

• If the switch is pressed while the A/C is operating, the compressor and blower fan motor stop, and the outlets

and inlets are set as shown below.

- Air outlet: FOOT
- Air inlet: Fresh air intake (during automatic inlet control)
• If the switch is pressed while A/C is stopped, the A/C turns ON with the same settings as before it is stopped.

A/C switch

• If the A/C switch is pressed while the compressor is ON, “A/C OFF” appears in the A/C section of the display,

the A/C switch indicator lamp turns OFF (orange), and the compressor turns OFF.

• When the A/C switch is pressed again, “A/C ON” appears in the A/C display, the A/C switch indicator lamp

(orange) turns ON, and the compressor turns ON.

• If the switch is operated while “AUTO” is shown on the display, automatic compressor control is cancelled

(“AUTO” turns OFF).

NOTE:
When blower fan motor is OFF, compressor control cannot be activated.

Heat switch

When the heat switch is pressed, the heat switch indicator light turns ON, and the PTC heater turns ON.
NOTE:
When blower fan motor is OFF, PTC heater control cannot be activated.

OPERATION

HAC-241

< SYSTEM DESCRIPTION >

[AUTO A/C (WITHOUT HEAT PUMP)]

HAC

REC switch

• When the REC switch is pressed, the inlet changes to REC (recirculation) and the REC indicator lamp turns

ON.

• If the REC switch is pressed and held for approximately two seconds or more when the inlet is REC (recir-

culation), the REC and FRE indicator lamps (orange) flash twice, and the inlet switches to automatic control.
During automatic control, the air inlet status (FRE, REC) is indicated by the indicator lamp.

• If the switch is operated while “AUTO” is shown on the display, automatic intake control is cancelled (“AUTO”

turns OFF).

NOTE:
Air inlet can be changed when air conditioning system is in OFF status.

Fan control switch

Air flow can be manually set within the range of speeds 1–7 using the fan control switch.
• +: Increase air flow.
•

−: Decrease air flow.

NOTE:
• When this switch is operated while A/C system is OFF, A/C system turns ON.
• If the switch is operated while “AUTO” is shown on the display, automatic air flow control is cancelled (“AU-

TO” turns OFF).

HAC-242

< SYSTEM DESCRIPTION >

[AUTO A/C (WITHOUT HEAT PUMP)]

DIAGNOSIS SYSTEM (A/C AUTO AMP.)

DIAGNOSIS SYSTEM (A/C AUTO AMP.)

Description

INFOID:0000000010121957

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

using diagnosis function of each control unit.

CONSULT Function

INFOID:0000000010121958

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 RESULTS

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 Results

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.

Content .. 807 808 809 810 ..