Sound in idle on Qualify / performance

I noticed when you are idling on perf or qualify mode about every 30 to 40 seconds it sounds like a generator or electric engine component kicks on with a small rattle for just a split second or two.

Anyone know what that is? Fan? Is something with the hybrid system?

 

No I'm in the Midwest part of the US so it's not too bad. It has been in the 70s and 80s mostly this summer.

It's almost like another device kicks on and maybe you're hearing a little bit of the rattle of the exhaust or something for 2 secs then gone.

Pretty consistent about every 30 to 40 seconds while in either of those modes.

 

Check it out. You can hear the fuel injections but listen to the background. You'll hear a "rattle" almost like an exhaust manifold cover; small little rattle blurps in there? I checked all the shrouds and they were tight as a button. Exhaust flap maybe? It's not real loud but loud enough. This was with the glass lid up. You hear it either way.

https://soundcloud.com/james-bond-246719533/296gtb