Validation of brake torque signal for use as a brake event

A method of validating with an electronic control unit of a vehicle a brake torque signal for use as a brake event input signal for at least diagnostic routines in the vehicle's onboard diagnostics that use the brake event input signal as an input and enabling or disabling use of the brake torque signal as the brake event input signal based on whether the validation is successful, the method comprising:

• rationalizing with the electronic control unit a brake pedal position signal and a master cylinder pressure signal;
• upon successfully rationalizing the brake pedal position signal with the master cylinder pressure signal, rationalizing with the electronic control unit the brake pedal position signal with the brake torque signal;
• determining with the electronic control unit that the brake torque signal has been successfully validated when the brake pedal position signal was successfully rationalized with the brake torque signal after the brake pedal position signal was successfully rationalized with the master cylinder pressure cylinder, and upon determining that the brake torque signal has been successfully validated, having the electronic control unit enable use of the brake torque signal as the brake event input signal for at least the diagnostic routines of the vehicles onboard diagnostic routines that use the brake torque signal as the brake event input signal;
• determining with the electronic control unit that the brake torque signal failed validation when the brake pedal position signal and master cylinder pressure signal failed rationalization or the brake pedal position signal and the brake torque signal failed rationalization, and upon determining that the brake torque signal failed validation, having the electronic control unit disable, during a current drive cycle, use of the brake torque signal as the brake event input signal for at least the diagnostic routines of the vehicle's onboard diagnostics that use the brake torque signal as the brake event input signal.