Why is the srs i used a jump wire to read codes instead of engine light

Let's go back. I was using a jump wire in the 2 prong diagnostic connector instead of the check engine light blinking when I turned on the ignition, the SRS light was blinking steadily. Can you tell me what this means? Also after I disconnected the battery for 20 minutes and reconnected the car started fine and I was able to drive it home. I have a suspicion that this will continue? Do I need to replace the ECU? I'm not sure what to do because there was no check engine light or anything when I parked it. No issues with how it was running. I parked it the after noon before and came out that afternoon and it wouldn't start. It was turning over strong so I knew battery and starter were fine. It had a half tank of gas and spewed like a geyser when I removed the fuel line and gave the ignition a click. I took out a spark plug and got super strong spark when I turned it over. Plug. s we're just changed and still very clean no fouling or buildup. Where do I go next? And why could I not read diagnostic by jumping that connector?

First, read my original response again, slower. Second, the SRS light was blinking because you jumped the wrong connector. Third, accuracy is your friend. Are you able to verify that the cam timing is in fact correct, not just that "everything turns over fine"? I believe I asked about injector pulse in my original reply, without that , fuel pressure is irrelevant.