Nissan Pathfinder. Manual - part 241

SYSTEM

BRC-23

< SYSTEM DESCRIPTION >

[VDC/TCS/ABS]

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switch.] VDC warning lamp turns ON when Brake limited slip differential (BLSD) function is in operation.

Noises and vibration may be generated due to brake operation. This is not a malfunction.

• CONSULT can be used to diagnose the system.

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

function, TCS function and hill start assist function. The vehicle status becomes the same as models without

VDC function, TCS function and hill start assist function. However, ABS function and EBD function are oper-

ated normally. Refer to 

BRC-19, "Fail-Safe"

.

NOTE:

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

INPUT SIGNAL AND OUTPUT SIGNAL

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

*1: Communication line between yaw rate/side/decel G sensor and ABS actuator and electric unit (control unit)

OPERATION CHARACTERISTICS

VDC Function That Prevents Oversteer Tendency

• 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.

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

ECM

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN 
communication:
• Acceleration pedal position signal
• Engine speed signal
Mainly receives the following signal from ABS actuator and electric unit (control unit) via CAN 
communication:
• Target throttle position signal

TCM

Mainly transmits the following signal to ABS actuator and electric unit (control unit) via CAN 
communication:
• Shift position 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:
• VDC warning lamp signal
• VDC OFF indicator lamp signal

ALFIA0339GB

BRC-24

< SYSTEM DESCRIPTION >

[VDC/TCS/ABS]

SYSTEM

• 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 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 cornering on a slippery road, when understeer tendency is judged large, engine out-

put is controlled as well as brake force (brake fluid pressure) of four wheels. Understeer tendency

decreases.

TCS FUNCTION

ALFIA0340GB

JPFIC0137GB

ALFIA0341GB

SYSTEM

BRC-25

< SYSTEM DESCRIPTION >

[VDC/TCS/ABS]

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TCS FUNCTION : System Diagram

INFOID:0000000009177249

TCS FUNCTION : System Description

INFOID:0000000009177250

• 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 at an 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.

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

function, the control is suspended for VDC function, TCS function,

and hill start assist function. The vehicle status becomes the same

as models without VDC function, TCS function and hill start assist

function. However, ABS function and EBD function are operated

normally. Refer to 

BRC-19, "Fail-Safe"

.

INPUT SIGNAL AND OUTPUT SIGNAL

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

ALFIA0327GB

JPFIC0139GB

BRC-26

< SYSTEM DESCRIPTION >

[VDC/TCS/ABS]

SYSTEM

*1: Communication line between yaw rate/side/decel G sensor and ABS actuator and electric unit (control unit)

ABS FUNCTION
ABS FUNCTION : System Diagram

INFOID:0000000009177251

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

ECM

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

TCM

Mainly transmits the following signal to ABS actuator and electric unit (control unit) via CAN 
communication:
• Shift position 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:
• VDC warning lamp signal
• VDC OFF indicator lamp signal

ALFIA0328GB