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Home >> Lexus >> 2024 >> NX 250 FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 9 (Electronically Controlled Brake System - Diagnostic Codes (3 Of 6)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HEV Model) >> DTC C05C1-51: Brake Pedal Position Sensor "B" Not Programmed [11/2021 - 03/2024] >> Procedure

DTC C05C1-51: Brake Pedal Position Sensor "B" Not Programmed [11/2021 - 03/2024]: Procedure

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  1. CHECK BRAKE PEDAL 
    1. Check that the brake pedal and the brake pedal stroke sensor assembly are properly installed and that the pedal can be depressed normally.
    2. Check and adjust the brake pedal height.

      Refer to ADJUSTMENT [11/2021 - ]

    3. Adjust the brake pedal stroke sensor assembly.

      Refer to INSTALLATION [11/2021 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  2

  2. CLEAR ZERO POINT VALUE FOR BRAKE PEDAL STROKE SENSOR ASSEMBLY 
    1. Clear the zero point value for the brake pedal stroke sensor assembly.

      Refer to RESET MEMORY / CALIBRATION [11/2021 - ]

      Chassis > Brake/EPB > Utility 

      Tester Display
      Reset Memory

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  3

  3. PERFORM BRAKE PEDAL STROKE SENSOR ASSEMBLY ZERO POINT CALIBRATION 
    1. Perform brake pedal stroke sensor assembly zero point calibration.

      Refer to RESET MEMORY / CALIBRATION [11/2021 - ]

      Chassis > Brake/EPB > Utility 

      Tester Display
      Calibration

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  4

  4. CLEAR DTC 
    1. Clear the DTCs.

      Chassis > Brake Booster > Clear DTCs 

      Chassis > Brake/EPB > Clear DTCs 

    2. Turn the ignition switch off.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  5

  5. RECONFIRM DTC 
    1. Based on the Freeze Frame Data and interview with the customer, attempt to reproduce the conditions when the malfunction occurred.
    2. Check if the same DTC is output.

      Chassis > Brake Booster > Trouble Codes 

      Chassis > Brake/EPB > Trouble Codes 

      Result

      Result Proceed to
      Only DTC C05C1-51 is output. A
      DTCs are not output. B
      DTCs other than C05C1-51 are output. C

    Result: 

    B 

    END 

    Result: 

    C 

    REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

    Result: 

    A 

    See step  6

  6. INSPECT BRAKE ACTUATOR ASSEMBLY (SENSOR OUTPUT) 
    1. Turn the ignition switch off.
    2. Make sure that there is no looseness at the locking part and the connecting part of the connectors.

      OK

      The connector is securely connected.

    3. Disconnect the A41 brake pedal stroke sensor assembly connector.
    4. Check both the connector case and the terminals for deformation and corrosion.

      OK

      No deformation or corrosion.

    5. Turn the ignition switch to ON.
    6. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A41-2 (VSK2) - A41-3 (SKG2) Ignition switch ON 4.84 to 5.16 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE PEDAL STROKE SENSOR ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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