Electric system playing up - Motor attempts to start itself

[Sydneydude]

I took some codes, saying its the crankshaft sensor
[img=http://s13.postimg.org/mzasfgjub/20150110_02.jpg]


The battery is dead, I will be charging it over night, hoping that I can take the car to the garage in the morning

Id suggest getting it plugged in to see if any error codes have been thrown up.
Sounds like a bcm might be on the way out

[Sydneydude]

Well, just the rain yesterday.

Did it go for a swim?
Sounds like what would happen with a corroded or flooded pcb.

[Sydneydude]

Returning from the High Country, after a drive of 700km, different warning lights came on, flashing, going on and off. The instrument lights went off then on again a couple of times. No other symptoms, however, starting from a red light was somewhat rough (auto).

We got home without issues but the unusual stuff happened in the night. At 5am we were woken up by the Prado's horn, tooting and the starter was engaging. The car attempted to start itself! The starter did not stop engaging over and over again until I disconnected the battery.

Any ideas?