Component Operating Range
WARNING: This page is about a different car, the 2025 Lexus NX 350h, 2024 Lexus NX 350h, 2023 Lexus NX 350h, and 2022 Lexus NX 350h. However, it is still accessible from the selected car via links, so may be relevant.
C12Fa (Case 1 And 2) And C12Fb (Case 1)
| Both Of The Following Conditions Are Met | A And B |
| A. All Of The Following Conditions Are Met At The ECU Status (Last Ig On Timing Final) | - |
| Brake System Voltage Fail (C12Fa, C12Fb) | Not Detected |
| Brake Booster Motor Fail (C141C, C141D, C141E, C141F) | Not Detected |
| Brake Pressure Control Solenoid Fail (C14F4, C14Fd, C150A, C1510) | Not Detected |
| B. All Of The Following Conditions Are Met At The ECU Status (Pre Main) | - |
| Brake System Voltage Fail (C121F, C12Fa, C12Fb) | Not Detected |
| Brake Booster Motor Fail (C141C) | Not Detected |
| Brake Pressure Control Solenoid Fail (C14F3, C14F4, C14Fc, C14Fd, C1509, C150A, C150F, C1510) | Not Detected |
C12Fa (Case 3)
| All Of The Following Conditions Are Met | A, B, C And D |
| A. Solenoid Relay | On |
| B. Brake System Voltage 1 | Higher Than 7.3 V |
| C. All Of The Following Conditions Are Met At The ECU Status (Last Ig On Timing Final) | - |
| Brake System Voltage Fail (C12Fa, C12Fb) | Not Detected |
| Brake Booster Motor Fail (C141C, C141D, C141E, C141F) | Not Detected |
| Brake Pressure Control Solenoid Fail (C14F4, C14Fd, C150A, C1510) | Not Detected |
| D. All Of The Following Conditions Are Met At The ECU Status (Pre Main) | - |
| Brake System Voltage Fail (C121F, C12Fa, C12Fb) | Not Detected |
| Brake Booster Motor Fail (C141C) | Not Detected |
| Brake Pressure Control Solenoid Fail (C14F3, C14F4, C14Fc, C14Fd, C1509, C150A, C150F, C1510) | Not Detected |
C12Fb (Case 2)
| All Of The Following Conditions Are Met | A, B And C |
| A. Solenoid Relay | Off |
| B. All Of The Following Conditions Are Met At The ECU Status (Last Ig On Timing Final) | - |
| Brake System Voltage Fail (C12Fa, C12Fb) | Not Detected |
| Brake Booster Motor Fail (C141C, C141D, C141E, C141F) | Not Detected |
| Brake Pressure Control Solenoid Fail (C14F4, C14Fd, C150A, C1510) | Not Detected |
| C. All Of The Following Conditions Are Met At The ECU Status (Pre Main) | - |
| Brake System Voltage Fail (C121F, C12Fa, C12Fb) | Not Detected |
| Brake Booster Motor Fail (C141C) | Not Detected |
| Brake Pressure Control Solenoid Fail (C14F3, C14F4, C14Fc, C14Fd, C1509, C150A, C150F, C1510) | Not Detected |