Hydraulic Control Assembly - Antilock Brakes: Testing and Inspection

ON-VEHICLE INSPECTION

HINT: Using the ABS actuator checker (SST), check the operation of the actuator. If the actuator does not operate, check the operation of sub-wire harness G. If the solenoid and/or pump motor relay are abnormal, replace the relay and inspect the actuator operation again.





1. INSPECT BATTERY POSITIVE VOLTAGE
Battery positive voltage: 10 - 14 Volts
2. DISCONNECT CONNECTORS
Disconnect the 2 connectors from the actuator.
3. CONNECT ACTUATOR CHECKER (SST)
a. Connect the actuator checker (SST) to the actuator side wire harness via the sub-wire harness (SST), as shown.
SST 09990-00150, 09990-00250, 09990-00300, 09990-00360
b. Connect the red cable of the checker to the battery positive (+) terminal and black cable to the negative (-) terminal. Connect the black cable of the sub-wire harness to the battery negative (-) terminal or body ground.





c. Place the "SHEET A" (SST) on the actuator checker.
SST 09990-00163

4. INSPECT BRAKE ACTUATOR OPERATION
a. Start the engine, and run it at idle.





b. Turn the selector switch of the actuator checker to "FRONT RH" position.
c. Push and hold in the MOTOR switch for a few seconds. Make sure that you can hear the motor run.
d. Depress the brake pedal and hold it for about 15 seconds, and check that the pedal does not go down.





e. With your foot still applied onto the brake pedal, push MOTOR switch and check that the brake pedal does not pulsate.





f. Depress the brake pedal and hold it. As you hold the pedal down, push and hold in the POWER SWITCH for a few seconds. Check that the pedal does not go down.

NOTICE: Do not keep the POWER SWITCH pushing more than 10 seconds.

g. With your foot still applied onto the brake pedal, release the POWER SWITCH and check that the pedal goes down.





h. With your foot still applied onto the brake pedal, push the MOTOR switch and check that the brake pedal returns.
i. Release the brake pedal.
5. INSPECT FOR OTHER WHEELS
a. Turn the selector switch to "FRONT LH" position.
b. Repeating (c) to (i) to the step 4, check the actuator operation similarly.





c. Similarly, inspect "REAR RH" and "REAR LH" position.

HINT: When inspecting the "REAR LH" position, push the REAR Lt. switch instead of the POWER SWITCH. This makes it possible to inspect wherever the selector switch position indicates.





6. PUSH MOTOR SWITCH
a. Push and hold in the MOTOR switch for a few seconds.
b. Stop the engine.
7. DISCONNECT ACTUATOR CHECKER (SST) FROM ACTUATOR
a. Disconnect the actuator checker (SST) and 3 sub-wire harness (SST) form the actuator.
SST 09990-00150, 09990-00163, 09990-00250, 09990-00300, 09990-00360
b. Connect the actuator connectors.
c. Clear the DTC.