Component Operating Range
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus UX 250h, 2023 Lexus UX 250h, 2022 Lexus UX 250h, 2021 Lexus UX 250h, and 2020 Lexus UX 250h. However, it is still accessible from the selected car via links, so may be relevant.
C139A
| All of the following conditions are met | - |
| Power switch | Off |
| History of vehicle speed in this trip | Higher than 3 km/h (2 mph) |
| Reaction force pressure sensor fail | Not detected |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| Brake fluid temperature | Higher than 0°C (32°F) |
| Reaction force pressure | 4.5 MPa (45.9 kgf/cm2 , 653 psi) or more for less than 0.003 seconds |
| Reaction force pressure | 1.5 MPa (15.3 kgf/cm2 , 218 psi) or more for less than 0.5 seconds |
C139D
| All of the following conditions are met | - |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| Brake | On |
| Servo pressure | Higher than 0.1 MPa (1 kgf/cm2 , 15 psi) |
C13CD
| All of the following conditions are met | - |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| Brake | On |
| Servo pressure | 0.5 MPa (5.1 kgf/cm2 , 73 psi) or more |
| Malfunction criteria | Not met |
C13CE
| All of the following conditions are met | - |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| Servo pressure decreases after linear solenoid (SLR) on | Higher than 0.5 MPa (5.1 kgf/cm2 , 73 psi) |
| Malfunction criteria | Not met |
C1400
| All of the following conditions are met | A, B, C, D, E, F and G |
| A. Power switch | Off |
| B. History of vehicle speed in this trip | Higher than 3 km/h (2 mph) |
| C. Reaction force pressure sensor fail | Not detected |
| D. Servo pressure sensor fail | Not detected |
| E. Brake-by-wire controlled mode | On |
| F. Brake fluid temperature | Higher than 0°C (32°F) |
| G. Any of the following conditions are met | (a), (b), (c) or (d) |
| (a). Servo pressure decrease | 0.4 MPa (4.1 kgf/cm2 , 58 psi) or less for 2 seconds or more |
| (b). Gradient of servo pressure | -20 MPa/s or more for 2 seconds or more |
| (c). Servo pressure increase after ABS pump motor on after malfunction criteria (a) and (b) are met | Higher than 0.5 MPa (5.1 kgf/cm2 , 73 psi) for less than 0.051 seconds |
| (d). Reduction of time required to ABS pump motor voltage drop below 1.3 V at ABS pump motor voltage on to off compared with no load condition after malfunction criteria (a) and (b) are met | Less than 0.1 seconds |
C14EE AND C14F7
| All of the following conditions are met | A, B, C, D, E, F and G |
| A. Power switch | Off |
| B. History of vehicle speed in this trip | Higher than 3 km/h (2 mph) |
| C. Reaction force pressure sensor fail | Not detected |
| D. Servo pressure sensor fail | Not detected |
| E. Brake-by-wire controlled mode | On |
| F. Brake fluid temperature | Higher than 0°C (32°F) |
| G. Either of the following condition is met | a or b |
| a. Both of the following conditions are met | - |
| Reaction force pressure decrease (a) | 0.03 MPa (0.3 kgf/cm2 , 4.4 psi) or more for less than 6 seconds |
| Reaction force pressure (b) | Less than -0.6 MPa (-6.1 kgf/cm2 , -87 psi) for less than 6 seconds |
| b. Reaction force pressure after malfunction criteria (b) is met | 0.2 MPa (2 kgf/cm2 , 29 psi) or more for less than 1.5 seconds |