Hydraulic Control Assembly - Antilock Brakes: Testing and Inspection
BRAKE ACTUATOR ASSEMBLYON-VEHICLE INSPECTION
1. CONNECT HAND-HELD TESTER:
a. Connect the hand-held tester to the DLC3.
b. Start the engine and run at idle.
c. Select the ACTIVE TEST mode on the hand-held tester.
HINT: Please refer to the hand-held tester operator's manual for further details.
2. INSPECT ACTUATOR MOTOR OPERATION
a. With the motor relay on, check the actuator motor operation noise.
b. Turn the motor relay off.
3. INSPECT RIGHT FRONT WHEEL OPERATION
a. Depress the brake pedal and hold it for approximately 15 seconds. Check that the brake pedal cannot be depressed.
b. With the motor relay on, check that the pedal does not vibrate.
NOTICE: Do not keep the motor relay on for more than 5 seconds. When operating it continuously, set an interval of more than 20 seconds.
c. Turn the motor relay off and release the brake pedal.
NOTICE: Be sure to follow the procedures when turning on a solenoid.
d. With the brake pedal depressed, perform the following operations.
e. Turn the SFRH and SFRR solenoid on simultaneously, and check that the pedal cannot be depressed.
NOTICE: Do not keep the solenoids turned on for more than 5 seconds. When operating them continuously, set an interval of more than 20 seconds.
f. Turn the SFRH and SFRR solenoids off simultaneously, and check that the pedal can be depressed.
g. Turn the motor relay on, and check that the pedal returns.
NOTICE: Do not keep the motor relay turned on for more than 5 seconds. When operating it continuously, set an interval of more than 20 seconds.
h. Turn the motor relay off and release the brake pedal.
4. INSPECT OTHER WHEEL OPERATION
a. Using the same procedures, check the solenoids of the other wheels.
NOTICE: Never depress the brake pedal under the condition that the reduction solenoid (S**R) alone is turned on.
HINT:
Left front wheel: SFLH, SFLR
Right rear wheel: SRRH, SRRR
Left rear wheel: SRLH, SRLR