There are many new noises with the Highlander Hybrid vs my previous traditional cars (coolant pumping to inverter, pressure relieve in gas tank etc) Many were described in the manual or mentioned on this site. The one I haven't found mentioned is a spark-like
sound..."tssk..tssk...tssk...tsssk" I here every once in a while coming from the back section of the vehicle. It really sounds like an electrical spark. Any information...has anyonme heard a similar sound ?