Technical Data-Braking System Messages
SYSTEM SIGNALS
| Brake signal messages broadcast by the Brake System Control Module (ABS Module) | ||
|---|---|---|
| MESSAGE | MESSAGE DESCRIPTION | MESSAGE DEFINITION |
| Brake Pedal Position Signal | Percentage of pedal travel | The PCM broadcasts the BPP Sensor signal voltage on the CAN bus. If the sensor signal is faulty, the PCM sets a fault against the sensor and sends a Signal Not Available (SNA) message on the CAN bus. |
| Master Cylinder Pressure Signal | Actual hydraulic pressure in the Master Cylinder | If the Master Cylinder Pressure Sensor is faulty, the ABS Module sets a fault against the sensor and sends an SNA message on the CAN bus. The PCM will set the implausible data fault (U0418) for the SNA message. |
| Brake Torque Signal | Hydraulic line pressure in the braking system to the wheels | The ABS Module calculates the sum of the hydraulic pressure to the calipers in all four hydraulic circuits. The signal is broadcast on the CAN bus. |