When you perform key programming or some other function for Lexus,it is necessary to remove 93C86 chip from instruction.So here car-auto-repiar.com show you guide on how to remove it.
DashBook Pro v7.9+SRSBook 1.4 2018 Removal Book 100% Work Solution

Procedures:
Removing the instrument cluster
Remove the air deflector on the left(on clips)

Remove trim control mirrors(on clips)

Remove the air deflector on the right(on clips)

Remove the cover plate to the”Start-Stop”(on clips)

Turning the steering wheel to the left and the right,loosen the 2 screws that secure the column cover,remove the top cover of the steering column with the bottom plate of the instrument cluster(on clips)

Unscrew the 2 screws that secure the instrument cluster

Instrument cluster keeps the top on clips,

Put his hands behind the instrument cluster through the holes from the removed air deflectors,

Remove the instrument cluster

Disassembly the instrument cluster
Remove the screws

Remove the back cover of the instrument cluster

In-circuit programming
