how to diagnose check engine light

[sloweighty]

i have a check engine light and i want diagnose it but i don't want to take it to autozone. I heard a lot about using some wires to connect to other wires on the diagnostic to get the check engine light to flash so if anyone can help me then it would be great.

[sr20det_s13]

From what some people said to me, you have to check your ECU which is located at the passanger's side ( just right where the right foot lays) heres a link http://ka24development.com/ecu_codes.html