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Home >> Lexus >> 2023 >> NX 250 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 11 (Electronically Controlled Brake System - Diagnostic Codes (2 Of 6)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HEV Model) >> DTC C0512-1F: Right Rear Wheel Speed Sensor Circuit Intermittent [11/2021 - ] >> Procedure

DTC C0512-1F: Right Rear Wheel Speed Sensor Circuit Intermittent [11/2021 - ]: Procedure

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  1. READ VALUE USING GTS (RR WHEEL SPEED AND MOMENTARY INTERRUPTION) 
    1. While monitoring the values of the Data List, perform a road test and attempt to reproduce the problem symptoms based on the interview with the customer and the vehicle conditions stored as Freeze Frame Data when the DTC was stored.

      Chassis > Brake/EPB > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      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 mph) When driving at constant speed: No large fluctuations
      RR Speed Open Rear speed sensor RH open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -

      Chassis > Brake/EPB > Data List 

      Tester Display
      RR Wheel Speed
      RR Speed Open

      OK

      The values change in accordance with the operation of the vehicle and there is no intermittent operation.

      NOTE:

      Perform the above inspection before removing the sensor and connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ] 

    Result: 

    NG 

    See step  2

  2. CHECK REAR SPEED SENSOR RH INSTALLATION 
    1. Turn the ignition switch off.
      GTY453396Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Rear Speed Sensor RH
      *a Correct
      *b Incorrect
      *c 8.5 N.m (87 kgf/cm, 75 in.lbf)
      *d No clearance
    2. Check the rear speed sensor RH installation.

      OK

      There is no clearance between the rear speed sensor RH and the rear axle carrier RH.

      The installation bolt is tightened properly.

      Torque 

      8.5 N.m (87 kgf/cm, 75 in.lbf)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REINSTALL OR REPLACE REAR SPEED SENSOR RH. Refer to  REMOVAL [11/2021 - 03/2024]  , or refer to  REMOVAL [03/2024 - ] 

    Result: 

    OK 

    See step  3

  3. CHECK REAR SPEED SENSOR RH (CHECK FOR FOREIGN MATTER) 
    1. Remove the rear speed sensor RH, and confirm that there is no foreign matter, oil or grease on the rear speed sensor tip RH.

      OK

      The rear speed sensor tip RH is free of oil and foreign matter.

      HINT: 

      If foreign matter of 1mm x 1mm or more is adhered to the rear speed sensor RH, this DTC may be stored.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  7

    Result: 

    OK 

    See step  4

  4. CHECK REAR SPEED SENSOR ROTOR RH (CHECK FOR FOREIGN MATTER) 
    1. Confirm that there is no foreign matter, oil or grease on the rear speed sensor rotor RH.

      OK

      The rear speed sensor rotor RH is free of oil and foreign matter.

      HINT: 

      • If foreign matter of 1mm x 1mm or more is adhered to the rear speed sensor rotor RH, this DTC may be stored.
      • The rear speed sensor rotor RH is incorporated into the rear axle hub and bearing assembly RH.

        If the rear speed sensor rotor RH needs to be replaced, replace it together with the rear axle hub and bearing assembly RH.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE REAR SPEED SENSOR RH AND REAR SPEED SENSOR ROTOR RH 

    for Rear Speed Sensor RH: Refer to REMOVAL [11/2021 - 03/2024] , or refer to REMOVAL [03/2024 - ]

    for Rear Speed Sensor Rotor RH: Refer to REMOVAL [11/2021 - 03/2024] , or refer to REMOVAL [03/2024 - ]

    Result: 

    NG 

    See step  5

  5. CLEAN REAR SPEED SENSOR ROTOR RH 
    1. Clean the rear speed sensor rotor RH.
      NOTE:

      Do not use parts cleaner when cleaning the rear speed sensor rotor RH.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  6

  6. READ VALUE USING GTS (RR WHEEL SPEED AND MOMENTARY INTERRUPTION) 
    1. While monitoring the values of the Data List, perform a road test and attempt to reproduce the problem symptoms based on the interview with the customer and the vehicle conditions stored as Freeze Frame Data when the DTC was stored.

      Chassis > Brake/EPB > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      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 mph) When driving at constant speed: No large fluctuations
      RR Speed Open Rear speed sensor RH open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -

      Chassis > Brake/EPB > Data List 

      Tester Display
      RR Wheel Speed
      RR Speed Open

      OK

      The values change in accordance with the operation of the vehicle and there is no intermittent operation.

      NOTE:

      Perform the above inspection before removing the sensor and connector.

      HINT: 

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

      If the rear speed sensor rotor RH needs to be replaced, replace it together with the rear axle hub and bearing assembly RH.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END 

    Result: 

    NG 

    REPLACE REAR SPEED SENSOR RH AND REAR SPEED SENSOR ROTOR RH 

    for Rear Speed Sensor RH: Refer to REMOVAL [11/2021 - 03/2024] , or refer to REMOVAL [03/2024 - ]

    for Rear Speed Sensor Rotor RH: Refer to REMOVAL [11/2021 - 03/2024] , or refer to REMOVAL [03/2024 - ]

  7. CLEAN REAR SPEED SENSOR RH 
    1. Clean the rear speed sensor RH.
      NOTE:

      When cleaning the rear speed sensor RH, make sure to clean the installation hole before installation.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  8

  8. READ VALUE USING GTS (RR WHEEL SPEED AND MOMENTARY INTERRUPTION) 
    1. While monitoring the values of the Data List, perform a road test and attempt to reproduce the problem symptoms based on the interview with the customer and the vehicle conditions stored as Freeze Frame Data when the DTC was stored.

      Chassis > Brake/EPB > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      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 mph) When driving at constant speed: No large fluctuations
      RR Speed Open Rear speed sensor RH open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -

      Chassis > Brake/EPB > Data List 

      Tester Display
      RR Wheel Speed
      RR Speed Open

      OK

      The values change in accordance with the operation of the vehicle and there is no intermittent operation.

      NOTE:

      Perform the above inspection before removing the sensor and connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END 

    Result: 

    NG 

    See step  4

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