Hydraulic Control Assembly - Antilock Brakes: Testing and Inspection

BRAKE CONTROL: BRAKE ACTUATOR: ON-VEHICLE INSPECTION

ON-VEHICLE INSPECTION

1. CONNECT TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Start the engine and run at idle.
(c) Select the ACTIVE TEST mode on the Techstream.

HINT: Refer to the Techstream 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.
(c) Depress the brake pedal and hold it for approximately 15 seconds. Check that the brake pedal cannot be depressed further.
(d) With the motor relay on, check that the pedal does not pulsate.

NOTE: Do not keep the motor relay turned on for more than 5 seconds continuously. When operating it continuously, set an interval of more than 20 seconds.

(e) Turn the motor relay off and release the brake pedal.
3. INSPECT RIGHT FRONT WHEEL OPERATION

NOTE: Never turn on the solenoids in a manner different from those described below.

(a) With the brake pedal depressed, perform the following operations.
(b) Turn the SFRH and SFRR solenoids on simultaneously, and check that the pedal cannot be depressed.

NOTE: Do not keep the solenoids turned on for more than 10 seconds continuously. When operating them continuously, set an interval of more than 20 seconds.

(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.

NOTE: Do not keep the motor relay turned on for more than 5 seconds continuously. When operating it continuously, set an interval of more than 20 seconds.

(e) Turn the motor relay off and release the brake pedal.
4. INSPECT OTHER WHEEL OPERATION
(a) Using the same procedure, check the solenoids of the other wheels.

HINT:
Left front wheel: SFLH, SFLR
Right rear wheel: SRRH, SRRR
Left rear wheel: SRLH, SRLR