Hydraulic Control Assembly - Antilock Brakes: Testing and Inspection

BRAKE CONTROL: BRAKE ACTUATOR: ON-VEHICLE INSPECTION

BRAKE CONTROL: BRAKE ACTUATOR: ON-VEHICLE INSPECTION

1. CONNECT TECHSTREAM
(a) Connect the Techstream to the DLC 3.
(b) Turn the ignition switch to the ON position.
(c) Select the ACTIVE TEST mode on the Techstream.
HINT: Please refer to the Techstream operator's manual further details.

2. CHECK ACTUATOR MOTOR OPERATION
NOTICE: Do not keep a motor relay ON for more than 5 seconds. When operating it consecutively, wait 20 seconds between each operation.

(a) Turn the motor relay ON and check the actuator motor operation noise.
(b) Turn the motor relay OFF.
(c) Fully depress the brake pedal and hold it for approximately 15 seconds. Check that the pedal's initial depth is maintained for the entire 15 seconds.
(d) Turn the motor relay ON and check that the pedal does not pulsate.
(e) Turn the motor relay OFF and release the pedal.
3. CHECK RIGHT FRONT WHEEL OPERATION
NOTICE:
- Be sure to follow the procedures below when turning ON a solenoid.
- Do not keep a solenoid ON for more 5 seconds. When operating it consecutively, wait 20 seconds between each operation.
- The pedal must not be depressed if only the reduction solenoid SFRR, SFLR, SRRR or SRLR is turned ON.

(a) With the pedal fully depressed, perform the following operations.
(b) Turn the SFRH and SFRR solenoids ON simultaneously, and check that the pedal cannot be depressed further.
(c) Turn the SFRH and SFRR solenoids OFF simultaneously, and check that the pedal can be depressed.
(d) Turn the motor relay ON and check that the pedal returns.
(e) Turn the motor relay OFF and release the pedal.
4. CHECK OTHER WHEEL OPERATION
(a) Using the same procedures, check the solenoids of the other wheels.
HINT:
Left front wheel: SFLH, SFLR
Right front wheel: SFRH, SFRR
Left rear wheel: SRLH, SRLR
Right rear wheel: SRLH, SRLR