Cooling fans on demand

[DHA2453]

Came across something interesting today and thought I would share and make sure my car wasn't being weird. I've driven an Aurion before but I actually own this one and like to experiment ^_^ ​.

When I turn my key to a point between ACC and IGN (halfway before your actually in ignition), things like A/C, auto lights etc respond (no reds/ system checks, optitron still blacked out), and funny enough both radiator/ cooling fans come on as well at full blast. They stay on until I twist fully into IGN, or go back to ACC. The car was cold, on a cold night. I'm assuming this is some sort of back-up cooling method for whatever reason.

Has anyone else seen this on their Aurions?

[trentmeyer23]

Yes. Please use the search function.

http://au.toyotaownersclub.com/forums/topic/51464-thermo-fan-forced-on-manually/

http://au.toyotaownersclub.com/forums/topic/18782-for-those-with-an-ignition-key-barrel/

[Full-Throttle]

When the last thread was started about this it happened when their car was warm, which led me to believe that the ignition was thinking the key was set the 'ON' position and turned the fans on when the coolant temperature rose enough to activate the thermo switch - However, I didn't realise this was an actual 'feature' from factory until just now when I tried it on my Aurion (which has a stone cold motor and hasn't been driven for almost 24-hours). Sure enough, halfway between 'ACC' and 'ON' the radiator fan came on full blast......Could potentially be a self-check system which sends a signal to/from the cooling fans to make sure everything is working as normal. Either way, it's a pretty handy thing to have as it's always reassuring to know that the radiator fans are working at this time of the year :)