RAV4 mk3 doors speed lock controller.

[Kos_ta]

Plug it in your OBD socket and you'll have all the doors locked when the car reaches 10mph. Doors unlock when you switch the engine off. You xan open drivers door from inside without unlocking the doors while this feature is active, to open other doors from inside/outside while engine running you'll need to unlock the doors manually using control button on driver's door. 

£10 plus postage.