Hi! In my previous Toyotas I've installed a $2 switch to the ignition fuse (IGN) as a very basic anti theft device. If one doen't turn this switch before cranking, the there won't be a spark and the engine won't start. I plan to do something similar to a gen 3 Prius PHEV now. The description of the IGN fuse is the following: Code: Brake system, driver support system, multiport fuel injection system/sequential multiport fuel injection system, SRS airbag system, front passenger occupant classification system (ECU and sensors), power management system, smart key system, front passenger's seat belt reminder light Are any of the self preserving features of the car linked to this fuse / systems? I don't care about generating a fault code if the car is turned on without a working IGN fuse, but I'd very much mind if for instance the cooling of the battery packs was depending on it and there was a risk of overheating while the car is parked. Any advice? Thanks, dieselsuxx
update: Removing the IGN fuse creates - as suspected - plenty of fault codes, but the vehicle remains operational in EV mode. I'll need to find another fuse for anti theft purposes.
Just in case someone else needs it: The stop fuse is the best choice to tackle. Without it the brake pedal switch doesn't work and without that that the car cannot be started. Also it doesn't store fault codes.
