Nissan Qashqai J11. Manual - part 949

SYSTEM

BRC-33

< SYSTEM DESCRIPTION >

[WITH ESP]

C

D

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H

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BRC

N

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BRAKE ASSIST FUNCTION : System Description

INFOID:0000000010329795

• When the driver brakes hard in an emergency, the stopping distance is reduced by increasing brake fluid

pressure.

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

for ESP/VDC function, TCS function, Brake limited slip differential (BLSD) function, Brake assist function, hill
start assist function and Brake force distribution function. The vehicle status becomes the same as models
without ESP/VDC function, TCS function, Brake limited slip differential (BLSD) function, Brake assist func-
tion, hill start assist function and Brake force distribution function. However, ABS function and EBD function
are operated normally. Refer to 

BRC-21, "Fail-Safe"

.

SYSTEM DIAGRAM

INPUT SIGNAL AND OUTPUT SIGNAL

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

ALFIA0420GB

Component

Signal description

ECM

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN 
communication.
• Accelerator pedal position signal
• Engine speed signal
• Engine torque signal
Mainly receives the following signals from ABS actuator and electric unit (control unit) via CAN 
communication.
• Engine torque request signal

TCM

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN 
communication.
• Current gear position signal

Chassis control module

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN 
communication.
• Active trace control signal

BRC-34

< SYSTEM DESCRIPTION >

[WITH ESP]

SYSTEM

hill start assist FUNCTION

hill start assist FUNCTION : System Description

INFOID:0000000010329798

• This function maintains brake fluid pressure so that the vehicle does not move backwards even if brake

pedal is released to depress accelerator pedal to start the vehicle while it is stopped on an uphill slope by
depressing brake pedal.

• This function operates when the vehicle is in stop status on a uphill slope of slope ratio 5% or more and

selector lever is in the position other than P or N.

• hill start assist function is only for the start aid. It maintains the brake fluid pressure for approx. 2 seconds

after releasing the brake pedal, and then decreases the pressure gradually. If the vehicle can start by the
accelerator operation, the brake is released automatically and a smooth start can be performed.

• Fail-safe function is adopted. When a malfunction occurs in hill start assist function, the control is suspended

for ESP/VDC function, TCS function, Brake limited slip differential (BLSD) function, Brake assist function, hill
start assist function and Brake force distribution function. The vehicle status becomes the same as models
without ESP/VDC function, TCS function, Brake limited slip differential (BLSD) function, Brake assist func-
tion, hill start assist function and Brake force distribution function. However, ABS function and EBD function
are operated normally. Refer to 

BRC-21, "Fail-Safe"

.

Combination meter

Mainly receives the following signals from 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.
• ESP/VDC warning lamp signal
• ESP/VDC OFF indicator lamp signal

Steering angle sensor

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

Component

Signal description

SYSTEM

BRC-35

< SYSTEM DESCRIPTION >

[WITH ESP]

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.

BRAKE FORCE DISTRIBUTION FUNCTION

E1FIA0167GB

Component

Signal description

ECM

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN 
communication.
• Accelerator pedal position signal
• Engine speed signal
• Engine torque signal
Mainly receives the following signals from ABS actuator and electric unit (control unit) via CAN 
communication.
• Engine torque request signal

TCM

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN 
communication.
• Current gear position signal

Combination meter

Mainly receives the following signals from 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.
• ESP/VDC warning lamp signal
• ESP/VDC OFF indicator lamp signal

BCM

Transmits the following signals to the ABS via CAN.
• Stop lamp switch

USM

Transmits the following signals to the ABS via CAN.
• Neutral position switch
• Reverse position switch

BRC-36

< SYSTEM DESCRIPTION >

[WITH ESP]

SYSTEM

BRAKE FORCE DISTRIBUTION FUNCTION : System Description

INFOID:0000000010329799

• Brake force distribution function is controlled by ABS actuator and electric unit (control unit).
• Brake force distribution function helps provide a more stable and

secure feeling.

• During cornering, when brake operation is performed brake fluid

pressure of each wheel is controlled based on steering operation
amount by the driver and vehicle cornering status amount detected
by each sensor.

• Fail-safe function is adopted. When a malfunction occurs in Brake

force distribution function, the control is suspended for VDC func-
tion, TCS function, Brake limited slip differential (BLSD) function,
Brake assist function, hill start assist function and Brake force dis-
tribution function. The vehicle status becomes the same as models
without ESP/VDC function, TCS function, Brake limited slip differ-
ential (BLSD) function, Brake assist function, hill start assist func-
tion and Brake force distribution function. However, ABS function
and EBD function are operated normally. Refer to 

BRC-21, "Fail-Safe"

.

NOTE:
Brake force distribution function may not always be operates in all driving conditions.

SYSTEM DIAGRAM

INPUT SIGNAL AND OUTPUT SIGNAL

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

JPFIC0171GB

JPFIC0172GB

ALFIA0420GB