Nissan X-Trail 32. Manual - part 146

 

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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 

BRC-43, "Fail-Safe"

.

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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