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Home >> Lexus >> 2022 >> ES 350 Base >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (Except Hybrid) - Diagnostic Codes (2 Of 4) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model) >> DTC C050C-23: Left Rear Wheel Speed Sensor Signal Stuck Low [06/2018 - 08/2020] >> Procedure

DTC C050C-23: Left Rear Wheel Speed Sensor Signal Stuck Low [06/2018 - 08/2020]: Procedure

  1. CHECK FREEZE FRAME DATA (WHEEL SPEED) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Enter the following menus: Chassis / Brake/EPB / Trouble Codes.
    4. Select a DTC to display the Freeze Frame Data.
    5. Read the freeze frame data of DTC C050C-23.

      Chassis > Brake/EPB 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      FR Wheel Speed Front wheel speed sensor RH reading Min.: 0.0 km/h (0 mph), Max.: 6553.5 km/h (4072 mph) Vehicle stopped: 0.0 km/h (0.0 mph) When driving at constant speed: No large fluctuations
      FL Wheel Speed Front wheel speed sensor LH reading Min.: 0.0 km/h (0 mph), Max.: 6553.5 km/h (4072 mph) Vehicle stopped: 0.0 km/h (0.0 mph) When driving at constant speed: No large fluctuations
      RR Wheel Speed Rear wheel speed sensor RH reading Min.: 0.0 km/h (0 mph), Max.: 6553.5 km/h (4072 mph) Vehicle stopped: 0.0 km/h (0.0 mph) When driving at constant speed: No large fluctuations
      RL Wheel Speed Rear wheel speed sensor LH reading Min.: 0.0 km/h (0 mph), Max.: 6553.5 km/h (4072 mph) Vehicle stopped: 0.0 km/h (0.0 mph) When driving at constant speed: No large fluctuations

      Chassis > Brake/EPB > DTC(C050C-23) > Freeze Frame Data 

      Tester Display
      FR Wheel Speed
      FL Wheel Speed
      RR Wheel Speed
      RL Wheel Speed

      Result

      Result Proceed to
      The value of RL Wheel Speed is 2 km/h (1 mph) or less when all other values are 12 km/h (7 mph) or more. A
      The value of RL Wheel Speed is 2 km/h (1 mph) or less when all other values are 43 km/h (27 mph) or more. B

    Result: 

    B 

    REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH. Refer to  REMOVAL [06/2018 - 08/2021] 

    Result: 

    A 

    See step  2

  2. READ VALUE USING TECHSTREAM (RL WHEEL SPEED) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Enter the following menus: Chassis / Brake/EPB / Data List.

      Chassis > Brake/EPB > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      RL Wheel Speed Rear wheel speed sensor LH reading Min.: 0.0 km/h (0.0 mph), Max.: 6553.5 km/h (4072 mph) Vehicle stopped: 0.0 km/h (0.0 mph) When driving at constant speed: No large fluctuations

      Chassis > Brake/EPB > Data List 

      Tester Display
      RL Wheel Speed
    4. Start the engine and perform a road test.
    5. Check that the value of RL Wheel Speed changes in accordance with vehicle speed when accelerating from 0 km/h to 20 km/h (0 mph to 12 mph).

      OK

      The value of RL Wheel Speed changes in accordance with vehicle speed.

      HINT: 

      If the result of the road test is within the specified range, it is possible that this DTC was stored due to a particular situation such as brake drag, wheelspin or wheel lockup.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] 

    Result: 

    NG 

    REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH. Refer to  REMOVAL [06/2018 - 08/2021] 

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