DRIVE-CONTROL
COMPONENTS
-
ABS
<AWD>
3-53
Control with G-sensor
L
Since four wheels are connected in AWD models,
and a high frictional resistance road and makes
the four wheels may decelerate almost in phase.
This tendency is especially strong on a low frictional
resistance road; suspected vehicle speed does not
match actual speed, the road is judged to be a
high frictional resistance road and the ABS control
becomes unreliable. At such a time, the G-sensor
distinguishes* between low frictional resistance road
the ABS control reliable by switching the method
of calculating suspected vehicle speed.
*
When braking on a low frictional resistance road,
the rate of vehicle deceleration is slow. On the
’
other hand, when braking on a high frictional
resistance road, the rate of vehicle deceleration
is fast.
Warning
light
Approx.
1 sec.
-
Approx.
1 sec.
14X0120
ABS Warning Light Control
In the following cases the ABS warning light lights up.
l
It lights up when trouble in the system is recognized.
l
It illuminates in the pattern shown in the figure on the
left when the ignition switch is turned ON, to check the
ABS warning light circuit.
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