How Do You Check an ECU ?

[vincentex3]

I need to see if my ECU is fualty by giving me a CPS code 4 engine light warning how do i check the Wiring or the Ecu Becuase the CPS sensor is good.

 

[emd513]

i guess you will have to pay and have it looked at on a mechanics computer. i asked the same thing a month ago and got no response. sorry