Nissan Athleon Year 2003

Hello friends, I have a problem with a Nissan Athleon of 2003 that does not carry Obd plug and breaks that it gives me is that walking with it stops accelerating a few seconds and is removed when the brake floor. I have already changed the pedal potentiometer, signal switch Q is on brake pedal next to the brake light and the clutch pedal signal switch. Let's see if you have the case to any of you. Greetings and thank you.