Does anyone know where the Quiescent Relay Box is, and what it does?

Doing some research, I believe it has something to do with battery drain and switching off components that are no longer required.

The IID says I have a fault code "B1412-96 (2F) Quiescent Relay Box - component internal failure", although the car doesn't seem to be experiencing any problems. If it is an easy replacement, it might be worth finding a 2nd hand replacement and swapping it out. Current:
- 2017 L405 3.0 V6 Autobiography
Sold:
- 2013 L405 4.4 TDV8 Vogue
- 2004 L322 4.4 Vogue (BRC LPG)
- 2002 L322 4.4 HSE (having fixed timing chain guides)
- 2000 P38 4.6 Vogue (BRC LPG)
- 1981 2-door In-Vogue
- 1980 Ex-Army SIII LWB
- 1976 SIII LWB
- 1968 SIIA
Stripped for parts:
- 2003 L322 4.4 Vogue

Load space RH side take panel off where fusebox and the 2nd battery located.

https://www.fullfatrr.com/gallery/albums/u...eplace.pdf
https://www.fullfatrr.com/gallery/albums/u...earJB7.pdf 2018 SE SDV8 4.4 Byron Blue

Thanks for those...

I've also just found a TOPIx notification - SSM72286: B1412-96 Flagged in the Gateway Module which seems to imply that nothing is needed.

Click image to enlarge

 2018 SE SDV8 4.4 Byron Blue

Same issue on my MY17 SDV8. Identified like you via IID Tool. Thanks for the Post - I'll ignore it,