Hydraulic Control Assembly - Antilock Brakes: Testing and Inspection

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: BRAKE ACTUATOR: ON-VEHICLE INSPECTION

1. CONNECT TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Start the engine and run it at idle.

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / ABS/VSC/TRAC / Active Test.

HINT
Refer to the Techstream operator's manual for further details.

2. INSPECT ACTUATOR MOTOR OPERATION

NOTICE:
Do not keep a motor relay on continuously for more than 5 seconds. If it is necessary to operate the relay repeatedly, leave an interval of more than 20 seconds between operations.

(a) Enter the following menus: Chassis / ABS/VSC/TRAC / Active Test / Motor Relay.

(b) With the motor relay on, check the actuator motor operation sounds.

(c) Turn the motor relay off.

(d) Depress the brake pedal and hold it for approximately 15 seconds. Check that the brake pedal cannot be depressed further.

(e) With the motor relay on, check that the pedal does not pulsate.

(f) Turn the motor relay off and release the brake pedal.

3. INSPECT RIGHT FRONT WHEEL OPERATION

NOTICE:
Do not turn on a solenoid in a manner different than described below.

(a) Enter the following menus: Chassis / ABS/VSC/TRAC / Active Test / ABS Solenoid / SFRH and SFRR.

(b) Depress the brake pedal and hold it.

(c) Turn the SFRH and SFRR solenoids on simultaneously and check that the pedal cannot be depressed further.

(d) Turn the SFRH and SFRR solenoids off simultaneously and check that the pedal can be depressed further.

NOTICE:
Do not keep a solenoid on continuously for more than 5 seconds. If it is necessary to operate a solenoid repeatedly, leave an interval of more than 20 seconds between operations.

(e) Turn the motor relay on and check that the pedal returns.

NOTICE:
Do not keep a solenoid on continuously for more than 5 seconds. If it is necessary to operate a solenoid repeatedly, leave an interval of more than 20 seconds between operations.

(f) Turn the motor relay off and release the 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