Nissan Leaf. Manual - part 499

EVC-20

< SYSTEM DESCRIPTION >

COMPONENT PARTS

Stop Lamp Switch

INFOID:0000000010120530

The stop lamp switch is installed to the brake pedal bracket. The

switch detects the state of the brake pedal and transmits an ON/OFF

signal to VCM.

The contact of the stop lamp switch is usually open. When the brake

pedal is depressed, it closes and the stop lamp switch signal is

transmitted as a voltage signal.

ASCD Steering Switch

INFOID:0000000010120531

ASCD steering switch has various values of electrical resistance for

each button. VCM reads voltage variation of switch, and determines

which button is operated.

Brake Pedal Position Switch

INFOID:0000000010120532

The brake pedal position switch is installed to the brake pedal

bracket. The switch detects the state of the brake pedal and trans-

mits an ON/OFF signal to VCM.

The contact of the brake pedal position switch is usually closed.

When the brake pedal is depressed, it opens to disconnect the cir-

cuit, and shut off the output voltage. This constitutes an brake pedal

position switch signal.

Battery Current Sensor (With Battery Temperature Sensor)

INFOID:0000000010120533

BATTERY CURRENT SENSOR

The battery current sensor is installed to the negative cable of the

battery. The battery current sensor detects the battery charge/dis-

charge current and transmits signals to VCM. VCM judges the bat-

tery load based on these signals and controls the power generation

by converting the target generation voltage to a power generation

command signal and transmitting it to the DC/DC converter.

CAUTION:

Never connect the electrical component or the ground wire

directly to the battery terminal. The connection causes the mal-

function of the power voltage variable control, and may cause

the battery to discharge.

BATTERY TEMPERATURE SENSOR

Battery temperature sensor is integrated in battery current sensor.

The sensor measures temperature around the battery.

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COMPONENT PARTS

EVC-21

< SYSTEM DESCRIPTION >

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This sensor uses a thermistor and its electrical resistance varies as the temperature varies. VCM detects a

voltage change caused by the change in electrical resistance.

<Reference data>

Coolant Temperature Sensor

INFOID:0000000010120534

The coolant temperature sensor is detects the coolant temperature.

This sensor uses a thermistor that changes its electrical resistance

according to the temperature. VCM detects a voltage change

according to electrical resistance change.

<Reference value>

Electric Water Pump

INFOID:0000000010120535

The electric water pump   feeds coolant by pressure, which circu-

lates in the high voltage system cooling circuit. They are controlled

by VCM independently so that the amount of pressure feed is

adjusted according to the vehicle speed and water temperature.

The electric water pump also integrates an interface circuit that mon-

itors the pump function for any malfunction, and it transmits a mal-

function signal to VCM if necessary.

Temperature [

°C (°F)]

Voltage (V)

Resistance (k

Ω)

25 (77)

3.333

1.9 - 2.1

90 (194)

0.969

0.222 - 0.258

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Coolant temperature [

°C (°F)]

Voltage (V)

Resistance (k

Ω)

–10 (14)

4.4

7.0 - 11.4

20 (68)

3.5

2.35 - 2.73

50 (122)

2.2

0.68 - 1.00

90 (194)

0.9

0.236 - 0.260

SEF012P

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EVC-22

< SYSTEM DESCRIPTION >

COMPONENT PARTS

Cooling Fan Control Module

INFOID:0000000010120536

The cooling fan control module is mounted on the cooling fan and

drives the cooling fan motor. 

The cooling fan control module conducts communication between

VCM via the PWM communication. The cooling fan control module

drives the cooling fan motor so that the cooling fan speed is con-

trolled in accordance with the control signal from VCM. 

Combination Meter

INFOID:0000000010120537

VCM controls the following items on the combination meter.

LI-ION BATTERY INFORMATION

Li-ion Battery Capacity Level Gauge   

VCM receives the Li-ion battery capacity signal from the Li-ion battery controller, and VCM transmits the signal

to the combination meter to display the maximum capacity of the Li-ion battery. When the capacity of the Li-ion

battery decreases with age and usage, the level of the gauge is also decreased.

Li-ion Battery Available Charge Gauge 

VCM receives the Li-ion battery available charge signal from the Li-ion battery controller, and VCM transmits

the signal to the combination meter to display the available Li-ion battery charge to run the vehicle.

Li-ion Battery Temperature Gauge 

VCM receives the Li-ion battery temperature signal from the Li-ion battery controller, and VCM transmits the

signal to the combination meter to display the Li-ion battery temperature.

Distance Range 

The driving range (km or miles) provides an estimated distance that the vehicle can be driven before recharg-

ing is necessary. The driving range is constantly being calculated, based on the amount of available Li-ion bat-

tery charge and the actual power consumption average.

VCM calculates average electricity consumption at a specified travel distance, according to total power con-

sumption of the vehicle. Based on the average electricity consumption and the Li-ion battery available charge

signal received from the Li-ion battery, VCM calculates driving range and transmits a driving range signal to

the combination meter.

POWER METER

Maximum Power 

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COMPONENT PARTS

EVC-23

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VCM receives a maximum motor output power signal from the traction motor inverter and a maximum regen-

erative power signal from the Li-ion battery controller. VCM transmits these signals to the combination meter

and displays the upper limit of available output power and regenerative electric power.

Current Motor Power 

VCM receives the current motor power signal from the traction motor inverter, and VCM transmits the signal to

the combination meter to display the power currently being output.

ECO Indicator

INFOID:0000000010120538

The ECO indicator shows the instantaneous ECO drivability in the
instant ECO indicator  , and shows the cumulative ECO drivability,
during 1 trip in the ECO tree  . 

For information regarding control, refer to 

EVC-65, "ECO INDICA-

TOR CONTROL : System Description"

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Approaching Vehicle Sound for Pedestrians (VSP)

INFOID:0000000010120539

VSP informs the user of various information by electronic sounds.

In the following cases, VCM transmits a operation signal to VSP.

For details of the charge sound system of VSP, Refer to 

VSP-22, "CHARGE SOUND SYSTEM : System

Description"

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WARNING LAMPS/INDICATOR LAMPS
WARNING LAMPS/INDICATOR LAMPS : EV System Warning Lamp

INFOID:0000000010120540

DESIGN/PURPOSE

The EV system warning lamp turns ON if a malfunction occurs with

the EV system.

BULB CHECK

For approximately 2 seconds after the power switch is turned ON.

SYNCHRONIZATION WITH MASTER WARNING LAMP

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Condition

Operation status

EVSE is connected to the normal charge port

Short beep (once)

When normal charging starts

Short beeps in sequence (twice)

When timer charge goes into standby mode

Press the charge port lid opener switch or the charge port lid open-
er button of intelligent key
(Hazard and buzzer reminder)

Three short beeps 

When EVSE is not connected correctly

Three short beeps continue repeatedly for 30 seconds

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