ABS <4WD> ± On-vehicle Service
35B-24
HYDRAULIC UNIT CHECK
1. Jack up the vehicle and support the vehicle with rigid racks placed at the specified jack-up points
or place the wheels which are checked on the rollers of the braking force tester.
Caution
(1) The roller of the braking force tester and the tyre should be dry during testing.
(2) When testing the front brakes, apply the parking brake, and when testing the rear brakes,
stop the front wheels by chocking them.
2. Turn the ignition key to the LOCK (OFF) position and set the MUT-II.
Caution
Turn the ignition key to the LOCK (OFF) position before connecting or disconnecting the MUT-II.
3.
After
checking
that
the
shift
lever
<M/T>
or
the
selector
lever
<A/T>
is
in
neutral,
start
the
engine.
4. Use the MUT-II to force-drive the actuator.
NOTE
(1) During the actuator test, the ABS warning lamp will illuminate and the anti-skid control will be
cancelled.
(2) When the ABS has been interrupted by the fail-safe function, the MUT-II actuator testing cannot
be used.
5. Turn the wheel by hand and check the change in braking force when the brake pedal is depressed.
When using the braking force tester, depress the brake pedal until the braking force is at the following
values, and check that the braking force decreases when the actuator is force-driven.
Front wheel 785 ± 981 N
Rear wheel 588 ± 784 N
The result should be as shown in the following diagram.
Pedal operation
Depressed
Released
Solenoid valve
position
Increase in pressure
Steady pressure
Reduction in pressure
Checking the
brake force
Lock
Drag force when the pedal is free
MUT-II actuator test
(Item No. 01, 02, 03, 04) start
2 seconds
Approx. 0.05 seconds
1 seconds
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