My Rav4 has been parked up for 17 days whilst I was away on holiday. Yesterday I started it up and drove around the block (about 1.5 miles) just to make sure it was all fine before returning to work today. I all seemed fine and the engine was running for all of the trip because the heater was on. I parked it back up, but when I tried leaving for work at 05:30 it wouldn't start. A message on the dash said "smart entry & start system malfunction", tried leaving the car and locking it but