Hydraulic Control Assembly - Antilock Brakes: Testing and Inspection

CAUTION: Turn the ignition switch off before disconnecting or connecting the scan tool.

1. Jack up the vehicle and support the vehicle with jackstands placed at the specified jack-up points or place the wheels which are checked on the rollers of the braking force tester.

CAUTION:
a. The roller of the braking force tester and the tire should be dry during testing.
b. When testing the front brakes, apply the parking brake, and when testing the rear brakes, stop the front wheels by using a wheel chock.

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 off and set the scan tool as shown.
4. Check that the shift lever (M/T) or the selector lever (A/T) is in neutral, and then start the engine.

NOTE:
a. At this time, the ABS system will switch to the scan tool mode and the ABS warning light will illuminate.
b. When the ABS has been interrupted by the fail-safe function, the scan tool actuator testing cannot be used.

5. Use the scan tool to force-drive the actuator.
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 changes to the brake drag force inspected in step 2 when the actuator is force-driven.
Front wheel: 785 - 981 N (176 - 220 lbs).
Rear wheel: 588 - 785 N (132 - 176 lbs).
The results should be as shown.








7. If the result of the inspection is abnormal, correct according to the "Diagnostic Table".
8. After inspection, disconnect the scan tool immediately after turning off the ignition switch.