Nissan Leaf. Manual - part 309

BRC-26

< SYSTEM DESCRIPTION >

[WITH VDC]

SYSTEM

Fail-safe

INFOID:0000000010120031

VDC FUNCTION, TCS FUNCTION, BRAKE LIMITED SLIP DIFFERENTIAL (BLSD) FUNCTION,
BRAKE ASSIST FUNCTION

VDC warning lamp in combination meter turn ON when a malfunction occurs in system [ABS actuator and

electric unit (control unit)]. The control is suspended for VDC function, TCS function, brake limited slip differen-

tial (BLSD) function and brake assist function. The vehicle status becomes the same as models without VDC

function, TCS function, brake limited slip differential (BLSD) function and brake assist function. However, ABS

function and EBD function are operated normally.

ABS FUNCTION

ABS warning lamp and VDC warning lamp in combination meter turn ON when a malfunction occurs in system

[ABS actuator and electric unit (control unit)]. The control is suspended for VDC function, TCS function, ABS

function, brake limited slip differential (BLSD) function and brake assist function. The vehicle status becomes

the same as models without VDC function, TCS function, ABS function, brake limited slip differential (BLSD)

function and brake assist function. However, EBD function is operated normally.

NOTE:

ABS self-diagnosis sound may be heard the same as in the normal condition, because self-diagnosis is per-

formed when power switch turns ON and when vehicle initially starts.

EBD FUNCTION

ABS warning lamp, brake warning lamp and VDC warning lamp in combination meter turn ON when a mal-

function occurs in system [ABS actuator and electric unit (control unit)]. The control is suspended for VDC

function, TCS function, ABS function, EBD function, brake limited slip differential (BLSD) function and brake

assist function. The vehicle status becomes the same as models without VDC function, TCS function, ABS

function, EBD function, brake limited slip differential (BLSD) function and brake assist function.

Several seconds after power switch is turned ON (when the system 
is in normal operation)

OFF

When VDC OFF switch is ON (VDC function and TCS function are 
OFF)

ON

Condition (status)

VDC OFF indicator lamp

DTC

Vehicle condition

C1101

The following functions are suspended:
• VDC function
• TCS function
• ABS function
• EBD function (only when both 2 rear wheels are malfunctioning)
• Brake limited slip differential (BLSD) function
• Brake assist function

C1102

C1103

C1104

C1105

C1106

C1107

C1108

C1109

The following functions are suspended:
• VDC function
• TCS function
• ABS function
• EBD function
• Brake limited slip differential (BLSD) function
• Brake assist function

C1110

C1111

The following functions are suspended:
• VDC function
• TCS function
• ABS function
• Brake limited slip differential (BLSD) function
• Brake assist function

SYSTEM

BRC-27

< SYSTEM DESCRIPTION >

[WITH VDC]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

C1113

The following functions are suspended:
• VDC function
• TCS function
• Brake limited slip differential (BLSD) function
• Brake assist function

C1115

The following functions are suspended:
• VDC function
• TCS function
• ABS function
• EBD function
• Brake limited slip differential (BLSD) function
• Brake assist function

C1116

The following functions are suspended:
• VDC function
• TCS function
• Brake limited slip differential (BLSD) function
• Brake assist function

C1120

The following functions are suspended:
• VDC function
• TCS function
• ABS function
• EBD function
• Brake limited slip differential (BLSD) function
• Brake assist function

C1121

C1122

C1123

C1124

C1125

C1126

C1127

C1140

C1142

The following functions are suspended:
• VDC function
• TCS function
• Brake limited slip differential (BLSD) function
• Brake assist function

C1143

C1144

C1145

C1146

The following functions are suspended:
• VDC function
• TCS function
• ABS function
• Brake limited slip differential (BLSD) function
• Brake assist function

C1155

C1164

The following functions are suspended:
• VDC function
• TCS function
• ABS function
• EBD function
• Brake limited slip differential (BLSD) function
• Brake assist function

C1165

C1166

C1167

C1176

The following functions are suspended:
• VDC function
• TCS function
• Brake limited slip differential (BLSD) function
• Brake assist function

C118A

The following functions are suspended:
• VDC function
• TCS function
• ABS function
• EBD function
• Brake limited slip differential (BLSD) function
• Brake assist function

DTC

Vehicle condition

BRC-28

< SYSTEM DESCRIPTION >

[WITH VDC]

SYSTEM

VDC FUNCTION
VDC FUNCTION : System Description

INFOID:0000000010120032

• Side slip or tail slip may occur while driving on a slippery road or intending an urgent evasive driving. VDC

function detects side slip status using each sensor when side slip or tail slip is about to occur and improves

vehicle stability by brake control and motor torque control during driving.

• In addition to ABS function, EBD function and TCS function, target side slip amount is calculated according

to steering operation amount from steering angle sensor. By comparing this information with vehicle side slip

amount that is calculated from information from yaw rate/side/decel G sensor and wheel sensor, vehicle driv-

ing conditions (conditions of understeer or oversteer) are judged and vehicle stability is improved by brake

force control on all 4 wheels and motor torque control.

• VDC function can be switched to non-operational status (OFF) by operating VDC OFF switch. In this case,

VDC OFF indicator lamp turns ON.

• Control unit portion automatically improves driving stability by performing brake force control as well as

motor torque control, by transmitting drive signal to actuator portion according to difference between target

side slip amount and vehicle side slip amount 

• VDC warning lamp blinks while VDC function is in operation and indicates to the driver that the function is in

operation.

• CONSULT can be used to diagnose the system diagnosis.

• Fail-safe function is adopted. When a malfunction occurs in VDC function, the control is suspended for VDC

function, TCS function, brake limited slip differential (BLSD) function and brake assist function. The vehicle

status becomes the same as models without VDC function, TCS function, brake limited slip differential

(BLSD) function and brake assist function. However, ABS function and EBD function are operated normally.

Refer to 

BRC-53, "Fail-safe"

.

NOTE:

VDC has the characteristic as described here, This is not the device that helps reckless driving.

C118C

The following functions are suspended:
• VDC function
• TCS function
• Brake limited slip differential (BLSD) function
• Brake assist function

U1000

U1010

U110D

The following functions are suspended:
• VDC function
• TCS function
• ABS function
• EBD function
• Brake limited slip differential (BLSD) function
• Brake assist function

DTC

Vehicle condition

JSFIA0894GB

SYSTEM

BRC-29

< SYSTEM DESCRIPTION >

[WITH VDC]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

SYSTEM DIAGRAM

INPUT SIGNAL AND OUTPUT SIGNAL

Major signal transmission between each unit via communication lines is shown in the following table.

JSFIA2065GB

Component

Signal description

Yaw rate/side/decel G sensor

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via com-
munication line

*1

:

• Yaw rate signal
• Side G sensor signal
• Decel G sensor signal

VCM

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN 
communication:
• Accelerator pedal position signal
• VCM control signal
• Shift position signal

Electrically-driven intelligent brake

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN 
communication line

*2

:

• Electrically-driven intelligent brake control signal
• Brake warning lamp request signal
• Brake system warning lamp request signal

Steering angle sensor

Mainly transmits the following signal to ABS actuator and electric unit (control unit) via CAN 
communication:
• Steering angle sensor signal

Combination meter

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN 
communication:
• Brake fluid level switch signal
• Parking brake switch signal
Mainly receives the following signals from ABS actuator and electric unit (control unit) via CAN 
communication:
• ABS warning lamp signal
• VDC warning lamp signal
• Brake warning lamp signal
• Brake system warning lamp signal
• VDC OFF indicator lamp signal