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BRAKES - Anti-lock Braking System
{ABS) <AWD>
5-31
Control by
Increasing Idling Speed {rpml
SiOC<'l four
wheel~
are connected in AWD
models,
it
m~y
happen that engine braking torque
is
applied to all
four
vvheels (engine brake
is
applied).
and do
not stop slipping even it a signal
10
hold or
to rer:luce pressure
is
sent.
In
slXh a r;ose. there is
a tenderlCY
for
a
lowering
in braking safety arKI "
longer brakirJg
distance.
Consequently. when the
ASS
functions
and the vehicle speed is over 20
km/h
112 mph), the erJgine idle speed is raised
to
1,800 rpm to help
recovery
of wheal speed and
for improved ASS performance
.
The ASS ECU
merely sends
the
motor
relay
drive signal, that
irKIicates ASS fUrlCtion, to the engine ECU arKIthe
irlCrease of the idle speed
is
performed by the
engine ECU.
(Refer to
the
Engine Control System
for
details.)
ABS Warning Light Control
1
000.
In
the
foilowirJg cases
the ASS warnino light
lights
up_
•
11
lights
up when trouble in the system
is
recogniz<ld
.
•
11 blinks in
the
patlern shown
in
the figure
on
the
left
when the ignition switch
is
turnoo
ON.
to.check the ASS
warning
li
ght circuit.
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