Disabling And Activating
WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition switch to LOCK position and remove key from switch. Remove auxiliary battery access panel located in trunk. Disconnect negative battery cable from auxiliary battery. Wearing insulated gloves, remove THS service plug. Wait 5 minutes for condensers in THS inverter circuit to deplete electrical charge before performing repairs. To Activate THS, reverse disabling procedure.