Brake Pedal Position Switch Stop Lamp Switch
WARNING: This page is about a different car, the 2019 Nissan NV3500 HD and 2019 Nissan NV2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Stop lamp switch and brake pedal position switch are installed to brake pedal bracket.
When the brake pedal is depressed, brake pedal position switch is turned OFF and stop lamp switch is turned ON.
ECM detects the state of the brake pedal by those two types of input (ON/OFF signal).