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Wanted to do some minor detailing in my engine bay this morning. First pulled the battery, then the air box (and ultimately the ECU), and battery tray. Cleaned and dried the plastic parts. Wiped down the exterior of the ECU with a wet cloth and dried it.

Blew the engine bay out with compressed air, just to get loose grit and leaves out. Reinstalled everything in reverse order, and now the car has power but won’t actually turn over. Can anyone advise if I need to follow a procedure to properly reconnect the ECU?
 

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Never removed the ecu, so maybe some of the other people that have removed the ecu will chime in.

Just thought I'd list the ecu removal:

Here's something for the Sonata as it should be similar:
 
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