Bosch dishwasher

Hello and please help. I have a bosch dishwasher and I the code says 2h. For the last month the timer would never go past 1min and keep running. I was told the module was shot. I have no serial number for this unit on the door . It wore off. Is there a drawing to help me remove module. I tried to remove same but need directions Thank you so very much for your help…email is tmwtta@aol.com