Nissan Pathfinder. Manual — part 241
SYSTEM
BRC-23
< SYSTEM DESCRIPTION >
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
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
.
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]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
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
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
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