Abs Actuator
- Connect TOYOTA hand-held tester to DLC3. Start the engine and run it at idle. Select ACTIVE TEST mode on hand-held tester. Check that operation sound of ABS pump motor is heard. Turn motor relay OFF. Depress brake pedal and hold it for about 15 seconds, and check that the brake pedal cannot be pushed down.
- Check that the brake pedal does not pulsate when the motor relay is turned ON by the hand-held tester. Turn the motor relay OFF and release brake pedal. Inspect right front wheel operation. With the brake pedal depressed, turn the SFRH and SFRR solenoid ON simultaneously, and check that the pedal cannot be pressed.
- Turn the SFRH and SFRR solenoids Off simultaneously, and check that the brake pedal does sinks down. Turn the motor relay ON, and check that the pedal returns to upright position. Turn motor relay OFF and release brake pedal. Inspect the other wheel solenoids operation using the same steps.
- Left front wheel: SFLH and SFLR
- Right front wheel: SRRH and SRRR
- Left rear wheel: SRLH and SRLR
CAUTION:
Never depress brake pedal under the condition that the reduction solenoid alone is turned ON as ABS ECU is at rest.
NOTE:
Do not keep motor relay on for more than 5 seconds continuously. When operating it continuously, set the interval of more than 20 seconds.