Brake Pedal Position Switch

Brake Pedal Position (BPP) switch is either hard wired to PCM and brakelight circuit, or broadcast over the Standard Corporate Protocol (SCP) network via another module to be received by PCM. The BPP input is used by PCM to disengage torque converter clutch and on some applications as an input for idle speed control for idle quality. If all brakelights are burned out (open circuit) on applications where BPP switch is hard wired to PCM, high voltage will be present at PCM due to a pull-up resistor in PCM, providing engine with fail-safe operation.