2006 TOYOTA RAV4 Service Repair Manual

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Page 1513 of 2000

TOYOTA RAV4 2006 Service Repair Manual BC–10BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
(1) Operation description:
The skid control ECU detects the vehicle's slip
condition by receiving signals from each speed
sensor a

Page 1514 of 2000

TOYOTA RAV4 2006 Service Repair Manual BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–11
BC
(e) VSC (Vehicle Stability Control):
The VSC system helps prevent the vehicle from
slipping sideways when front or rear wheel skidding

Page 1515 of 2000

TOYOTA RAV4 2006 Service Repair Manual BC–12BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
(1) Operation description:
The skid control ECU determines the vehicle
condition by receiving signals from the speed
sensor, the yaw r

Page 1516 of 2000

TOYOTA RAV4 2006 Service Repair Manual BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–13
BC
(1) Operation description:
The slip indicator light blinks and the downhill
assist control indicator light and brake light come
on whe

Page 1517 of 2000

TOYOTA RAV4 2006 Service Repair Manual BC–14BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
(g) Hill-start assist control:
When the vehicle starts off on a steep hill, hill-start
assist control effects 4-wheel hydraulic pressur

Page 1518 of 2000

TOYOTA RAV4 2006 Service Repair Manual BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–15
BC
(1) Operation description:
When the system is in operation, the following
occurs: 1) the slip indicator light blinks; 2) the
VSC light

Page 1519 of 2000

TOYOTA RAV4 2006 Service Repair Manual BC–16BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
C136090E01

Page 1520 of 2000

TOYOTA RAV4 2006 Service Repair Manual BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–17
BC
(1) Operation description:
The skid control ECU determines that the
vehicle is in a state in which the AUTO LSD can
operate by using v

BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–17
BC
(1) Operation description:
The skid control ECU determines that the
vehicle is in a state in which the AUTO LSD can
operate by using various sensors and switches
to detect the operating conditions of the AUTO
LSD switch, shift position, accelerator pedal, and
brake pedal. When the vehicle is in a state in
which the AUTO LSD can operate, the skid
control ECU effects hydraulic pressure control of
the wheel cylinder at the wheel with the faster
wheel speed so that the wheel speeds of the
right and left drive wheels will become equal.
The slip indicator light blinks and the AUTO LSD
indicator light comes on when the system is
operating. Both the VSC warning light and SLIP
indicator light come on when the AUTO LSD
system malfunctions.
2. COOPERATIVE CONTROL FUNCTION
(a) Description
(1) Braking when Surface Resistance Differs
Between Left and Right Wheels
If the driver suddenly applies the brakes on a
road surface with a considerable difference in
friction coefficient between the right and left
wheels, the difference in the brake force
between the right and left wheels will cause the
vehicle posture to become unstable and create a
yaw movement. In this state, the skid control
ECU controls the VSC to stabilize the vehicle
posture. At the same time, it effects cooperative
control with the EPS to provide steering torque
assist, which facilitates the driver's steering
maneuvers to stabilize the vehicle posture.
(2) Accelerating when Surface Resistance Differs
Between Left and Right Wheels
If the driver suddenly starts off or accelerates on
a road surface with a considerable difference in
friction coefficient between the right and left
wheels, the slippage of a drive wheel will cause
the vehicle posture to become unstable and
negatively affect its acceleration performance. In
this state, the skid control ECU causes the TRC
to control the hydraulic brake of the slipping
drive wheel, and requests the engine ECU to
effect engine output control. At the same time, it
effects cooperative control with the EPS to
provide steering torque assist, which facilitates
the driver's steering maneuvers to stabilize the
vehicle posture.

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