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ABS <2WD> -
On-vehicle Service
35B-22
HYDRAULIC UNIT CHECK
35200170227
Caution
Turn the ignition switch off before connecting or disconnecting the MUT-
II
.
1. Jack up the vehicle and support t h e vehicle with rigid racks placed at the specified jack-up points
or place the wheels which are checked on t he 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. Release the parking brake, and feel the drag force (drag torque) on each road wheel.
When using the braking force tester, take a reading of the brake drag force.
3. Turn the ignition key to the OFF position and set the MUT-II.
4. After checking that the shift lever <M/T> or the selector lever <A/T> is in neutral, start the engine.
5. Use the MUT-II to force-drive the actuator.
NOTE
1. During the actuator test, th e 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.
6. 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 (when not working)
Checking the
brake force
Lock
Drag force when the pedal is free
MUT-
II
actuator test
(Item No. 01, 02, 03, 04) start
1 seconds
2 seconds
3 seconds
7. If the result of inspection is abnormal, correct according to the “Diagnosis Table” (Refer to P.35B-23).
8. After inspection, disconnect the MUT-II immediately after turning the ignition switch to OFF.