I was driving my Legend last week with no problems. A few hours later I was getting ready to take off and the car would not start. Symptoms were consistent with a main relay failure. However, I just replaced the relay two year ago and dropped a JDM engine earlier this year. When turning the ignition the relay clicks as it is supposed to. Did a code test through the ECU and found that it was 15 - Ignition Output signal. Just to be safe I bought a new battery, replaced the cables, and replaced the igniter unit and still no start. I think that the coils are good but I have not tested them yet. Can someone offer any suggestions.