Nissan Leaf. Manual - part 505

 

  Index      Nissan     Nissan Leaf (2011-2014 year) - Service and Repair Manual

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  503  504  505  506   ..

 

 

Nissan Leaf. Manual - part 505

 

 

EVC-44

< SYSTEM DESCRIPTION >

SYSTEM

EV SYSTEM START UP CONTROL
EV SYSTEM START UP CONTROL : System Description

INFOID:0000000010120555

SYSTEM DIAGRAM

CONTROL DESCRIPTION

VCM judges the operation mode from signals sent by various sensors, switches, and ECUs, and controls the

start/stop of the EV system by activating the relays accordingly.

P31B5

TYPE 1

ASCD operation prohibited
NOTE:
The ECO indicator value also becomes extremely poor. 

TYPE 2

No fail-safe.

P31B6

VCM sets the DC/DC converter output power to a constant 14 V.

P31C5

• VCM inhibits the timer charge and the remote climate control.
• VCM inhibits the automatic 12V battery charge control.

P31C6

• VCM inhibits the timer charge and the remote climate control.
• VCM inhibits the automatic 12V battery charge control.

P31C7

• VCM inhibits the timer charge and the remote climate control.
• VCM inhibits the automatic 12V battery charge control.

P31CA

×

Traction motor output is limited.

P31CB

×

Traction motor output is limited.

P31D5

• Traction motor output is limited.
• Vehicle speed is limited. [Approx. 40 km/h (25 MPH)]

P31DB

×

×

×

×

P31DC

×

×

×

×

P31DE

TYPE 1

Traction motor output is limited.

TYPE 2

×

×

×

×

Start not possible

P31E0

TYPE 1

×

×

×

×

TYPE 2

No fail-safe.

P31E1

TYPE 1

×

×

×

×

TYPE 2

No fail-safe.

P31E7

Doing READY again is prohibited.

P31F2

VCM inhibits the timer charge and the remote climate control.

DTC

Pattern

Others

A

B

C

D

JSCIA0486GB

SYSTEM

EVC-45

< SYSTEM DESCRIPTION >

D

E

F

G

H

I

J

K

L

M

A

B

EVC

N

O

P

Power Switch ON

When the power ON power supply from the IPDM E/R enters VCM, VCM turns ON the M/C relay to supply

power to each ECU in the EV system. 

READY

When the driver operates the POWER switch while depressing the brake pedal, VCM turns ON the M/C relay

to supply power to each ECU in the EV system. Furthermore, VCM activates the F/S relay to start the power

supply to the system main relay.

NOTE:

VCM inhibits the vehicle is set to READY in following conditions:

• Charge connector is connected

• Li-ion battery remaining energy is too low.

• Li-ion battery temperature is too low. [Approximately -25

°C (-13°F)]

In Normal Charging

If VCM judges that the system is in normal charge mode, VCM turns ON the M/C relay to supply power to

each ECU in the EV system. Furthermore, VCM activates the F/S relay to start the power supply to the system

main relay.

NOTE:

Normal charging does not start with the power switch ON.

JSCIA0487GB

JSCIA0488GB

JSCIA0489GB

EVC-46

< SYSTEM DESCRIPTION >

SYSTEM

In Quick Charging

When VCM judges that the system is in quick charge mode, VCM turns ON the M/C relay to supply power to

each ECU in the EV system. VCM also activates the F/S CHG relay to supply power to the quick charge relay

inside PDM (Power Delivery Module). Furthermore, VCM activates the F/S relay to start the power supply to

the system main relay.

When Air Conditioner Is Operating (Power OFF)

When air conditioner is activated (e.g. remote climate control and Climate Ctrl. Timer), VCM turns ON the M/C

relay to start the EV system. VCM also activates the A/C relay to supply power to the air conditioner system.

Furthermore, VCM activates the F/S relay to start the power supply to the system main relay.

When Automatic 12V Battery Charge Control is Operating

When VCM judges that the 12V battery requires automatic charging, VCM turns ON the M/C relay to start the

EV system. Furthermore, VCM activates the F/S relay to start the power supply to the system main relay.

Relay Activation Matrix

POWER ON

POWER OFF

*: Only during quick charging

HIGH VOLTAGE POWER SUPPLY CONTROL

JSCIA0490GB

Relay

Condition

POWER ON

READY

Charging

When 12V bat-

tery is charged

Climate Ctrl. 

Timer

Normal charge

Quick charge

F/S  relay

ON

ON

ON

ON

ON

ON

M/C  relay

ON

ON

ON

ON

ON

ON

A/C  relay

ON

ON

ON

ON

ON

ON

F/S CHG relay

OFF

OFF

OFF

ON

OFF

OFF

Relay

Condition

Charging

When 12V battery 

is charged

Climate Ctrl. Timer

Remote cli-

mate control

Normal charge

Quick charge

F/S  relay

ON

ON

ON

ON

ON

M/C  relay

ON

ON

ON

ON

ON

A/C relay

OFF

OFF

OFF

ON

ON

F/S CHG relay

OFF

ON

OFF

OFF

ON

*

SYSTEM

EVC-47

< SYSTEM DESCRIPTION >

D

E

F

G

H

I

J

K

L

M

A

B

EVC

N

O

P

HIGH VOLTAGE POWER SUPPLY CONTROL : System Description

INFOID:0000000010120556

SYSTEM DIAGRAM

DESCRIPTION

When the driver performs the READY operation or connects the charge cable to a charging port or when VCM

starts according to the timer control and judges the necessity of connecting the high voltage circuit to Li-ion

battery, VCM activates system main relay 1, system main relay 2, and the pre-charge relay located inside the

Li-ion battery to establish the circuit.

Moreover, the high voltage circuit of the EV system has a pre-charge circuit to protect the high voltage circuit

from sudden application of high voltage current.

CONTROL FLOW

To connect the high voltage circuit, VCM first activates the system main relay 2 and pre-charge relay.

As a result, the high voltage power is supplied to the respective systems via the pre-charge resistor in the pre-

charge circuit. When the condenser inside the traction motor inverter is fully charged by the applied power, the

traction motor inverter transmits a high voltage power supply preparation completion signal to VCM. Receiving

JSCIA0491GB

JSCIA0492GB

 

 

 

 

 

 

 

Content   ..  503  504  505  506   ..