DD1 PS Version

Hi
Is there a way to check if a port on the Fanatec Podium Wheel Base is working? When I connect a shifter, the shifter icon appears on the OLED screen. However, when I connect my CSL Load Cell Pedals to the pedal port, there is no response at all. On the DD Pro, the pedals work normally. The question is: If I connect a shifter to the pedal port, should there be any response, or would nothing happen? Has anyone else experienced similar issues?