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Home >> Lexus >> 2020 >> UX 200 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 9 (Electronically Controlled Brake System (Diagnostic Codes (4 Of 4) & Circuit Tests) (Hybrid)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> ABS Operates Before Necessary When Braking [10/2018 - ] >> Procedure

ABS Operates Before Necessary When Braking [10/2018 - ]: Procedure

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  1. PERFORM TEST MODE (SIGNAL CHECK) INSPECTION (SPEED SENSOR CIRCUIT) 
    1. Using the Techstream, perform a Test Mode (Signal Check) inspection sensor check and check that speed sensor Test Mode (Signal Check) inspection items change from incomplete to complete.

      Refer to TEST MODE PROCEDURE [10/2018 - ]

      Chassis > ABS/VSC/TRAC > Utility 

      Tester Display
      Signal Check

      OK

      Speed sensor Test Mode (Signal Check) inspection items change from incomplete to complete.

      Result

      Result Proceed to
      OK (for Front and Rear (for AWD)) A
      OK (for Rear (for 2WD)) B
      NG C
      NOTE:
      • When cleaning the front speed sensor, make sure to clean the installation hole before installation.
      • Do not use parts cleaner when cleaning the front speed sensor rotor.

      HINT: 

      The rear speed sensor and rear speed sensor rotor are incorporated into the rear axle hub and bearing assembly.

      If the rear speed sensor and rear speed sensor rotor need to be replaced, replace the rear axle hub and bearing assembly.

    Result: 

    CLEAN FRONT SPEED SENSOR AND FRONT SPEED SENSOR ROTOR 

    Result: 

    REPLACE REAR AXLE HUB AND BEARING ASSEMBLY. Refer to  REMOVAL [10/2018 - 07/2022]  , or refer to  REMOVAL [07/2022 - ] 

    Result: 

    INSPECT AND REPAIR MALFUNCTIONING SPEED SENSOR CIRCUIT