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                                                                                             BR-33
                                   BRAKE   -   ABS ACTUATOR


                     TOYOTA        ABS ACTUATOR                                                BR0WF-05

                     Hand-held     ON-VEHICLE INSPECTION
                     Tester
                                   1.    CONNECT TOYOTA hand-held tester
                                   (a)   Connect the TOYOTA hand-held tester to the DLC3.
                                   (b)   Start the engine and run it at idle.
                                   (c)   Select the ACTIVE TEST mode on the TOYOTA hand-
                                         held tester.
     DLC3                 D08002
                                   HINT:
                                   Please refer to the TOYOTA hand-held tester operator's manu-
                                   al for further details.
                                   2.     INSPECT ABS ACTUATOR MOTOR OPERATION
                                   (a) Check that the operation sound of the ABS actuator mo-
                                          tor can be heard when the motor relay is turned ON by the
                                          TOYOTA hand-held tester.
                                   NOTICE:
                                   Do not keep motor relay ON for more than 5 seconds con-
                                   tinuously. When operating it continuously, set the interval
                                   of more than 20 seconds.
                                   If the operation sound can not be heard, replace the ABS actua-
                                   tor because the motor operation is in failure.
                                   (b) Turn the motor relay OFF.
                                   3.     INSPECT RIGHT FRONT WHEEL SOLENOID
                                   (a) Depress the brake pedal and hold it for about 15 seconds,
                                          and check that the brake pedal does not go down further.
                                   If the brake pedal goes down, replace the ABS actuator be-
                                   cause the sealing condition of the reduction solenoid valve is
                                   abnormal.
                                   (b) Check that the brake pedal does not pulsate when the
                                          motor relay is turned ON by the TOYOTA hand-held tes-
                                          ter.
                                   NOTICE:
                                   Do not keep motor relay ON for more than 5 seconds con-
                                   tinuously. When operating it continuously, set the interval
                                   of more than 20 seconds.
                                   If there is a pulsation in the brake pedal, replace the ABS actua-
                                   tor because the sealing condition of the reduction solenoid
                                   valve is abnormal.
                                   (c) Turn the motor relay OFF.
                                   (d) Depress the brake pedal and hold it until the step (g) is
                                          completed.
                                   (e) Check that the brake pedal does not go down further
                                          when the SFRH and SFRR solenoids are turned ON by
                                          the TOYOTA hand-held tester.
                                   NOTICE:
                                   Do not keep solenoid ON for more than 2 seconds continu-
                                   ously. When operating it continuously, set the interval of
                                   more than 20 seconds.
                                   If the brake pedal goes down, replace the ABS actuator be-
                                   cause the holding solenoid valve operation is abnormal.
2002 ECHO (RM884U)

                                                     Author :             Date :               1050
BR-34
                     BRAKE   -   ABS ACTUATOR

                     HINT:
                     To prevent the solenoids, TOYOTA hand-held tester turns OFF
                     automatically 2 secs. after has been turned ON simultaneously.
                     (f)    Check that the brake pedal goes down further when the
                            solenoids are turned OFF.
                     If the brake pedal does not go down, replace the ABS actuator
                     because the reduction solenoid valve operation is abnormal.
                     (g) Check that the brake pedal returns when the motor relay
                            is turned ON by the TOYOTA hand-held tester.
                     NOTICE:
                     Do not keep motor relay ON for more than 5 seconds con-
                     tinuously. When operating it continuously, set the interval
                     of more than 20 seconds.
                     If the brake pedal does not return, replace the ABS actuator be-
                     cause the motor operation is in failure.
                     (h) Turn the motor relay OFF and release the brake pedal.
                     4.     INSPECT OTHER WHEEL SOLENOIDS OPERATION
                     Check the solenoids of the other wheels with the same inspec-
                     tion procedure as the right front wheel solenoids.
                     HINT:
                     Left front wheel: SFLH and SFLR
                     Right rear wheel: SRRH and SRRR
                     Left rear wheel: SRLH and SRLR
                     NOTICE:
                     Never depress the brake pedal under the condition that the
                     reduction solenoid alone is turned ON as ABS ECU is reset.
                     5.     CLEAR DTC (See page DI-201 )




2002 ECHO (RM884U)

                                       Author :             Date :              1051



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