Normal Operation and Fault Conditions

The brake pedal switch is an internal component of the EBB unit.

There are 2 brake circuits hardwired between the ABS module and the PCM; the BOO and the BPS.

When the brake pedal is pressed or the accelerator pedal is released, the ABS module sends a ground signal along the BOO circuit and at the same time, a voltage signal along the BPS circuit.

The ABS module also sends a brake pedal message out on the vehicle CAN.