Nissan X-Trail 32. Manual — part 146
BRC-50
< SYSTEM DESCRIPTION >
[WITH VDC (ESP)]
SYSTEM
*1: CVT models
*2: 4WD models
OPERATION CHARACTERISTICS
VDC Function That Prevents Oversteer Tendency
Component parts
Signal description
Combination meter
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• Parking brake switch signal
• Brake fluid level switch signal
Mainly receives the following signals from ABS actuator and electric unit (control unit) via CAN
communication.
• ABS warning lamp signal
• VDC OFF indicator lamp signal
• VDC warning lamp signal
• Brake warning lamp signal
TCM
*1
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• N range signal
• P range signal
• R range signal
• Current gear position signal
• Shift position signal
• TCM malfunction signal
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 status signal
• ECM malfunction signal
IPDM E/R
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• Ignition switch ON signal
BCM
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• Stop lamp switch signal
• Brake pedal position switch signal
• Cranking signal
• Ignition switch ON signal
Electric parking brake control module
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• Electric parking brake operation signal
4WD control unit
*2
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• 4WD malfunction signal
• 4WD operation signal
Steering angle sensor
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• Steering angle sensor signal
SYSTEM
BRC-51
< SYSTEM DESCRIPTION >
[WITH VDC (ESP)]
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BRC
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• During a cornering, brake force (brake fluid pressure) is applied on front wheel and rear wheel on the outer
side of turn. Moment 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.
VDC Function That Prevents Tendency
• During a cornering, brake force (brake fluid pressure) is applied on front wheel and rear wheel on the inner
side of turn. Moment 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
JPFIC0135GB
JPFIC0136GB
JPFIC0137GB
JPFIC0138GB
BRC-52
< SYSTEM DESCRIPTION >
[WITH VDC (ESP)]
SYSTEM
TCS FUNCTION : System Description
INFOID:0000000010723635
• 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 VDC OFF switch. In this case, VDC OFF indicator lamp
turns ON.
• 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 VDC function, TCS function,
brake limited slip differential (BLSD) function, brake assist function,
brake force distribution function, hill start assist function, advanced
hill descent control function (4WD models with gasoline engine),
active trace control function (control of chassis control module) and
active ride control function (control of chassis control module). The
vehicle status becomes the same as models without VDC function,
TCS function, brake limited slip differential (BLSD) function, brake
assist function, brake force distribution function, hill start assist function, advanced hill descent control func-
tion (4WD models with gasoline engine), active trace control function (control of chassis control module) and
active ride control function (control of chassis control module). However, ABS function and EBD function are
operated normally. Refer to
.
SYSTEM DIAGRAM
NOTE:
• 4WD control unit is applied to 4WD models.
• TCM is applied to CVT models.
JSFIA0972GB
JSFIA2367GB
SYSTEM
BRC-53
< SYSTEM DESCRIPTION >
[WITH VDC (ESP)]
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INPUT SIGNAL AND OUTPUT SIGNAL
Major signal transmission between each unit via communication lines is shown in the following table.
*1: CVT models
*2: 4WD models
ABS FUNCTION
ABS FUNCTION : System Description
INFOID:0000000010723636
• 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.
Component parts
Signal description
Combination meter
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• Parking brake switch signal
• Brake fluid level switch signal
Mainly receives the following signals from ABS actuator and electric unit (control unit) via CAN
communication.
• ABS warning lamp signal
• VDC OFF indicator lamp signal
• VDC warning lamp signal
• Brake warning lamp signal
TCM
*1
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• N range signal
• P range signal
• R range signal
• Current gear position signal
• Shift position signal
• TCM malfunction signal
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 status signal
• ECM malfunction signal
IPDM E/R
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• Ignition switch ON signal
BCM
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• Stop lamp switch signal
• Brake pedal position switch signal
• Cranking signal
• Ignition switch ON signal
Electric parking brake control module
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• Electric parking brake operation signal
4WD control unit
*2
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• 4WD malfunction signal
• 4WD operation signal
Steering angle sensor
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• Steering angle sensor signal
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