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Nissan Leaf. Manual - part 508

EVC-56

< SYSTEM DESCRIPTION >

SYSTEM

Cooling fan duty (%)

Cooling fan operation (Climate Ctrl. Timer ON or remote climate control ON)

AIR CONDITIONER CONTROL
AIR CONDITIONER CONTROL : System Description

INFOID:0000000010120564

SYSTEM DIAGRAM

NOTE:

TCU is included only in models with TELEMATICS system.

DESCRIPTION

In EV, VCM controls the A/C relay so that the air conditioner can operate even when power switch is OFF. The

Climate Ctrl. Timer (A/C-heater timer), remote climate control (models with 7 inch display) and de-ice control

(automatic air conditioning system with heat pump system) functions are enabled by this control.

When VCM recognizes a need for air conditioner activation due to driver operation, Climate Ctrl. Timer func-

tion, remote climate control function (models with 7 inch display), or de-ice control function (automatic air con-

ditioning system with heat pump system), VCM activates the A/C relay to supply power to the air conditioning

system.

In addition, VCM calculates the power that can be used by the air conditioning system based on the Li-ion bat-

tery status and vehicle status and sends it to the A/C auto amp.

Engine coolant temper-

ature [

°C (°F)]

Vehicle speed [km/h (MPH)]

0 (0) – 20 (12)

20 (12) – 50 (31)

50 (31) – 80 (50)

80 (50) or more

60 (140) or less

60 (140) – 62 (144)

40 – 85

62 (144) or more

100

Engine coolant tem-

perature [

°C (°F)]

Cooling fan duty (%)

60 (140) or less

60 (140) – 62 (144)

35 – 100

62 (144) or more

100

Engine coolant tem-

perature [

°C (°F)]

Cooling fan duty (%)

60 (140) or less

60 (140) – 62 (144)

40 – 100

62 (144) or more

100

JMIIA2922GB

SYSTEM

EVC-57

< SYSTEM DESCRIPTION >

EVC

When ECO mode is selected, VCM sends the ECO mode signal to the A/C auto amp. to control the air condi-

tioner at a lower rate than normal.

For an overview of air conditioner types, refer to

HAC-30, "AUTOMATIC AIR CONDITIONING SYSTEM : Sys-

tem Description"

(automatic air conditioning system with heat pump system) or

HAC-228, "AUTOMATIC AIR

CONDITIONING SYSTEM : System Description"

(automatic air conditioning system without heat pump sys-

tem).

CONTROL DESCRIPTION

Cooling/heating Function Control During Power Supply Position ON

When the power supply position is ON (vehicle condition is not READY while power switch is ON), VCM

allows the operation of cooling/heating function control in the status that EVSE is connected. However, start of

cooling/heating function is allowed only while charging is in progress. Refer to

HAC-43, "Description"

(auto-

matic air conditioning system with heat pump system) or

HAC-239, "Description"

(automatic air conditioning

system without heat pump system) for details of cooling/heating function control during power supply position

ON.

NOTE:

If the Li-ion battery available charge gauge level is lower than Level 2, the A/C does not operate during battery

charge.

Climate Ctrl. Timer Control

When all of the following conditions are satisfied, VCM activates the timer air conditioner so that the in-vehicle
temperature reaches in-vehicle setting temperature*

before the scheduled departure time*

• Timer of Climate Ctrl. Timer is ON

• There is AC power input during charging (or in a state where AC power input is possible).

VCM activates the EV system 2 hours before the scheduled departure time. The A/C auto amp. judges the

necessary operating time of Climate Ctrl. Timer within the range between 0 and 2 hours according to the ambi-

ent temperature and interior temperature and sends the data to VCM. VCM calculates and judges the operat-

ing time required for activating the Climate Ctrl. Timer, according to the scheduled departure time and the

received data.

NOTE:

• When turning ON the power switch during Climate Ctrl. Timer is activated, the air conditioning control

switches to normal.

• When the timer charge and timer air conditioner operate simultaneously, perform air conditioner power distri-

bution according to the following settings.

- Models with 7 inch display: timer priority setting that are set on the navigation screen

- Models without 7 inch display: Climate Ctrl. Timer priority

• *1: The in-vehicle setting temperature can be set as per the following.

- Models with 7 inch display: A/C temperature that are set on the navigation screen

- Models without 7 inch display: 25

°C (unchangeable)

• *2: Set the scheduled departure time from the navigation screen (models with 7 inch display) or from the

vehicle information display on the combination meter (models without 7 inch display).

Remote Climate Control

When VCM receives the remote climate control request signal from the TCU, the air conditioning is operated.

Remote air-conditioning operates as follows.

NOTE:

When the power is turned ON during remote climate control is activated, the remote air conditioning is ended.

De-ice Control (Automatic Air Conditioning System With Heat Pump System)

• When VCM receives a de-ice request signal from A/C auto amp. and it is in the normal charge mode or quick

charge mode, VCM turns the A/C relay ON and sends a de-ice permission signal (permission) to A/C auto

amp. A/C auto amp. operates the de-ice function due to receiving a de-ice permission signal

• When the charge mode is completed due to full charge or timer charge completion while the de-ice function

is operating, the de-ice function continues to operate. The charge status indicator 3 blinks while the de-ice

function operates after charge completion.

Condition

Operating time (min)

Charge connector is not connected.

When connecting EVSE (with AC input)

15 – 120

During quick charge

15 – 120

EVC-58

< SYSTEM DESCRIPTION >

SYSTEM

NOTE:

If the charge connector is disconnected from the charge port, VCM sends a de-ice permission signal (prohi-

bition) and the de-ice function is stopped.

• After the compressor operation is stopped due to de-ice control function, VCM operates the cooling fan

according to a cooling fan speed request signal that is received from the A/C auto amp.

• For detail of de-ice control function, refer to

HAC-37, "AUTOMATIC AIR CONDITIONING SYSTEM : Heat

Pump System Control"

POWER VOLTAGE VARIABLE CONTROL SYSTEM
POWER VOLTAGE VARIABLE CONTROL SYSTEM : System Description

INFOID:0000000010120565

SYSTEM DIAGRAM

DESCRIPTION

The power voltage variable control system changes the output from the DC/DC converter built-in PDM (Power

Delivery Module) to 13-15 V to reduce the power consumption according to the status of use of electrical

equipment and that of 12 V battery.

CONTROL DESCRIPTION

The battery current sensor (with battery temperature sensor) measures the battery charge/discharge current

and the battery ambient temperature.

VCM judges the state of use of electric equipment and that of battery according to the measurement, decides

target output voltage of the DC/DC converter, and transmits a target DC/DC converter output signal to PDM

(Power Delivery Module). PDM (Power Delivery Module) changes the output voltage of the DC/DC converter

according to the target DC/DC converter output signal. When an error occurs in the power voltage variable

control system or when a target DC/DC converter output signal is not transmitted to the DC/DC converter due

to error, the DC/DC converter outputs 14 V. VCM detects an error in the DC/DC converter according to a DC/

DC converter status signal transmitted from PDM (Power Delivery Module).

AUTOMATIC 12V BATTERY CHARGE CONTROL

JSCIA0808GB

SYSTEM

EVC-59

< SYSTEM DESCRIPTION >

EVC

AUTOMATIC 12V BATTERY CHARGE CONTROL : System Description

INFOID:0000000010120566

SYSTEM DIAGRAM

DESCRIPTION

The automatic 12V battery charge control is a control to reduce the frequency of battery discharge by auto-

matically charging the 12V battery in case the 12V battery voltage is low when the key switch is turned to ON

or the vehicle is left unattended for a long time.

When VCM judges a need for automatic charge, VCM controls the DC/DC converter and the system main

relay and charges the 12V battery using the Li-ion battery power.

For 12V battery charge control during READY condition, refer to

EVC-58, "POWER VOLTAGE VARIABLE

CONTROL SYSTEM : System Description"

NOTE:

When any of the following operations is performed, the 12V battery automatic charge control is canceled: 1)

Vehicle to the READY state, 2) Normal charge, 3) Quick charge, 4) Climate Ctrl. Timer or remote climate con-

trol ON.

CONTROL DESCRIPTION

Power Switch ON

VCM monitors the 12V battery voltage during power switch ON cycle and immediately starts charging when

VCM judges that the voltage is lowered.

NOTE:

VCM does not perform the automatic 12V battery charge control when the shift position is in a range other

than “P” range.

When Vehicle is Not Used for A Long Time

VCM measures the time of no operation using its internal timer. If the time of no operation reaches 24 hours,

VCM performs automatic charge for 4 minutes.

VCM resets the no operation status continuous time when the vehicle satisfies one of the following conditions.

• READY continues for more than 4 minutes.

• Normal charge continues for more than 4 minutes.

• Quick charge continues for more than 4 minutes.

• Climate Ctrl. Timer or remote climate control continues for more than 4 minutes.

• Discharge current of 12 V battery is 1.5 A or more.

JSCIA0498GB

Vehicle state

12V battery charge

Shift position

READY

Always charged.

Any position

Normal charge ON

“P” position only

Quick charge ON

Climate Ctrl. Timer or remote
climate control ON

Power switch ON

Automatically started when 12V battery voltage is low.

Power switch OFF

Charge for 5 minutes when the vehicle is not used for a long time.

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