D/C cut fuse

Thanks for sharing this. I’m not sure I’d recommend removing the D/C CUT fuse, however. By design, this reduces but doesn’t completely curtail the parasitic load, since it was meant to leave the car drivable for loading and unloading on its way from the assembly plant to the dealer.

For cars that will be parked a while, I’d suggest instead to follow Toyota’s recommendations for new vehicles that will be stored at dealers for 30 days or more. See bulletins T-SB-0037-20, “Long-Term Vehicle Storage Guidelines” (PDF), and T-SB-0040-20, “Maintenance for HV and Auxiliary Batteries” (PDF), which suggest to disconnect the negative (–) terminal of the auxiliary (12-volt) battery, which stops parasitic drain, of course, but not the self-discharge of the auxiliary or HV batteries. For that, the latter bulletin also says to run the hybrid system for 30 minutes, at least once every two months.

Toyota’s pre-delivery service (PDS) check sheets say that removing the D/C CUT fuse can cause diagnostic trouble codes (DTCs) B1650, B1794, U0100, U0142, and U0155 to be stored. These DTCs, and any related freeze frame data, should be cleared using a Toyota Techstream diagnostic system after the car is returned to service, as a dealer would after reinstalling the D/C CUT fuse during PDS.