Brake Pedal Switch (BPS)/Brake Deactivator Switch

BRAKE PEDAL SWITCH (BPS)/BRAKE DEACTIVATOR SWITCH

The BPS, also sometimes called the brake deactivator switch, is for vehicle speed control deactivation. A normally closed switch supplies battery positive voltage (B+) to the PCM when the brake pedal is NOT applied. When the brake pedal is applied, the normally closed switch opens and power is removed from the PCM.

On some applications the normally closed BPS, along with the normally open brake pedal position (BPP) switch, are used for a brake rationality test within the PCM. The PCM misfire monitor profile learn function can be disable if a brake switch failure occurs. If one or both brake pedal inputs to the PCM did not change states when they were expected to, a diagnostic trouble code P1572 can be set by the PCM strategy.