DTC C0040-9E: Brake Pedal Switch "A" Stuck On; DTC C0040-9F: Brake Pedal Switch "A" Stuck Off [11/2021 - ]: Description
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2025 Lexus NX 350, 2025 Lexus NX 250, 2024 Lexus NX 350, 2024 Lexus NX 250, and 2023 Lexus NX 350. However, it is still accessible from the selected car via links, so may be relevant.
Refer to DTC C0040-13.
Refer to DTC C0040-13: Brake Pedal Switch "A" Circuit Open [11/2021 - ]
| DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
DTC Output from |
Priority |
| C0040-9E |
Brake Pedal Switch "A" Stuck On |
Either of the following is detected:
- With the stop light switch off, the brake pedal load sensing switch on, and the master cylinder pressure less than 0.7 MPa (7.13 kgf/cm2
, 101 psi), the vehicle acceleration rate is more than -0.8 m/s2
for 10 seconds or more. (Only when the engine is running and booster malfunctions are not detected.)
- Condition which the brake pedal load sensing switch remains on while the vehicle speed increases from 0 km/h (0 mph) to 30 km/h (19 mph) occurs 5 times in succession.
|
- Brake pedal load sensing switch (brake pedal support assembly)
- Wire harness and connector
- Skid control ECU (brake actuator assembly)
|
Brake/EPB |
B |
| C0040-9F |
Brake Pedal Switch "A" Stuck Off |
Either of the following is detected:
- With the stop light switch on, the brake pedal load sensing switch off, and the master cylinder pressure more than 6 MPa (61.2 kgf/ cm2
, 870 psi), the vehicle acceleration rate is less than -4 m/s2
for 1 second or more.
- With the stop light switch on, the brake pedal load sensing switch off, and the master cylinder pressure more than 6 MPa (61.2 kgf/ cm2
, 870 psi), the vehicle speed is 0 km/h (0 mph) for 5 seconds or more.
|
- Brake pedal load sensing switch (brake pedal support assembly)
- Wire harness and connector
- Skid control ECU (brake actuator assembly)
|
Brake/EPB |
B |