Nissan Qashqai J11. Manual — part 947
SYSTEM
BRC-25
< 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.
OPERATION CHARACTERISTICS
VDC Function That Prevents Oversteer Tendency
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
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 warning lamp signal
• ESP 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
BRC-26
< SYSTEM DESCRIPTION >
[WITH ESP]
SYSTEM
• During a cornering, brake force (brake fluid pressure) is applied on front wheel and rear wheel on the outer
side of turn. Momentum directing towards the outer side of turn is generated. Oversteer is prevented.
• Changing driving lane on a slippery road, when oversteer tendency is judged large, engine output is con-
trolled as well as brake force (brake fluid pressure) of 4 wheels. Oversteer tendency decreases.
ESP/VDC Function That Prevents Understeer Tendency
• During a cornering, brake force (brake fluid pressure) is applied on front wheel and rear wheel on the inner
side of turn. Momentum directing towards the inner side of turn is generated. Understeer is prevented.
• Applying braking during a cornering on a slippery road, when understeer tendency is judged large, engine
output is controlled as well as brake force (brake fluid pressure) of four wheels. Understeer tendency
decreases.
TCS FUNCTION
ALFIA0339GB
ALFIA0340GB
JPFIC0137GB
ALFIA0341GB
SYSTEM
BRC-27
< SYSTEM DESCRIPTION >
[WITH ESP]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
TCS FUNCTION : System Description
INFOID:0000000010329791
• Wheel spin status of drive wheel is detected by wheel sensor of 4
wheels. Engine output and transmission shift status is controlled
so that slip rate of drive wheels is in appropriate level. When wheel
spin occurs on drive wheel, ABS actuator and electric unit (control
unit) perform brake force control of LH and RH drive wheels (apply
brake force by increasing brake fluid pressure of drive wheel) and
decrease engine torque by engine torque control. Wheel spin
amount decreases. Engine torque is controlled to appropriate
level.
• TCS function can be switched to non-operational status (OFF) by
operating ESP/VDC OFF switch. In this case, ESP/VDC OFF indi-
cator lamp turns ON.
• ESP/VDC warning lamp blinks while TCS 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 TCS
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 function, hill start assist function and
Brake force distribution function However, ABS function and EBD
function are operated normally. Refer to
.
SYSTEM DIAGRAM
INPUT SIGNAL AND OUTPUT SIGNAL
Major signal transmission between each unit via communication lines is shown in the following table.
JPFIC0139GB
ALFIA0420GB
BRC-28
< SYSTEM DESCRIPTION >
[WITH ESP]
SYSTEM
ABS FUNCTION
ABS FUNCTION : System Description
INFOID:0000000010329792
• By preventing wheel lock through brake force (brake fluid pressure) control that is electronically controlled by
detecting wheel speed during braking, stability during emergency braking is improved so that obstacles can
be easily bypassed by steering operation.
• During braking, control units calculates wheel speed and pseudo-vehicle speed, and transmits pressure
increase, hold or decrease signals to actuator portion according to wheel slip status.
• The following effects are obtained by preventing wheel lock during
braking.
- Vehicle tail slip is prevented during braking when driving straight.
- Understeer and oversteer tendencies are moderated during brak-
ing driving on a corner.
- Obstacles may be easily bypassed by steering operation during
braking.
• CONSULT can be used to diagnose the system diagnosis.
• Fail-safe function is adopted. When a malfunction occurs in ABS
function, the control is suspended for VDC function, TCS function,
ABS 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
VDC function, TCS function, ABS function, Brake limited slip differ-
ential (BLSD) function, Brake assist function, hill start assist func-
tion and Brake force distribution function. However, EBD function
is operated normally. Refer to
NOTE:
• ABS has the characteristic as described here, This is not the
device that helps reckless driving.
• To stop vehicle efficiently, ABS does not operate and ordinary
brake operates at low speed [approx. 10 km/h (6 MPH) or less, but
differs subject to road conditions).
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
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
JPFIC0140GB
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