DTC C0040-9E: Brake Pedal Switch "A" Stuck On; DTC C0040-9F: Brake Pedal Switch "A" Stuck Off [08/2019 - ]: Description
The brake pedal load sensing switch signal turns on when the brake pedal is depressed with a force exceeding a predetermined level.
The skid control ECU (brake actuator assembly) uses this circuit to detect if the brake pedal is depressed or not.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
|---|---|---|---|---|
| C0040-9E | Brake Pedal Switch "A" Stuck On | Any of the following is detected:
|
|
- |
| C0040-9F | Brake Pedal Switch "A" Stuck Off | Any of the following is detected:
|
|
- |
C0040-9E DTC DETECTION CONDITIONS
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | When the +BS terminal voltage is 9.5 V or higher | ◦ | ◦ |
| Malfunction Status | With the stop light switch signal off, the brake pedal load sensing switch signal on, the master cylinder pressure below 0.7 MPa (71.1 kgf/cm2 , 101 psi), and the engine speed 500 rpm or higher, the deceleration is below 0.08 G | ◦ | - |
| The condition that the brake pedal load sensing switch signal remains on while the vehicle speed increases from 0 km/h (0 mph) to 30 km/h (19 mph) occurs 5 times in succession | - | ◦ | |
| Detection Time | 10 seconds or more. | - | |
| Number of Trips | 1 trip | 1 trip | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.
C0040-9F DTC DETECTION CONDITIONS
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | When the +BS terminal voltage is from 9.5 to 17.4 V | ◦ | ◦ |
| Malfunction Status | With the stop light switch signal on, the brake pedal load sensing switch signal off, and the master cylinder pressure 6 MPa (61.2 kgf/cm2 , 870 psi) or more, the deceleration is 0.4 G or more | ◦ | - |
| With the stop light switch signal on, the brake pedal load sensing switch signal off, and the master cylinder pressure exceeding 6 MPa (61.2 kgf/cm2 , 870 psi), the vehicle speed is 0 km/h (0 mph) | - | ◦ | |
| Detection Time | 1 second or more. | 5 seconds or more. | |
| Number of Trips | 1 trip | 1 trip | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.