Interesting Evening!

[MrChips]

So I arrived home after work/pub to find the car sitting there on the drive, still looking very smart after i'd spent yesterday giving it a good clean.
As I was walking up the drive I heard a familiar noise. WTF..the fans are on!

Luckily they can't have been on for that long as the battery was still holding some charge. Managed to get in and turned off the main ignition key (you know, the one that we always leave on!) and they stopped. Turned it back on, and they stayed off.

I need to use the car tomorrow morning for a photoshoot.. so it's now sitting on charge. I've taken the fan relays out and brought them inside to clean up.

Anyone know where the ecu temp sender is? Most I could find after a search is that it's under the airbox somewhere? Anyone got a picture?

Fingers crossed for tomorrow

[NCE 61]

The ECU temperature sensor is the one between throttle bodies 4 & 5:-

[MrChips]

Cheers!! Hoping it's still working enough to kick the fans in, although I'd presume that if it fails completely then it'll fall into failsafe mode and stick the fans on.

Just gone out to the car and all seems ok this morning. I'll be chuckling if I turn up at the photoshoot on the back of an AA truck

[NCE 61]

Thats correct If the temp sensor fails both fans should come on, maybe the connector just needs cleaning

[nawarne]

IIRC, I've seen posts to check the fan relays if the fans remain on with the ignition 'OFF'.

Believe that the relays can 'stick' the high current contacts, allowing the fans to run with the low current supply turned off. Cure is to replace relay(s). Think there's loads of post on here referencing this.
Nick

[blueg33]

I had fan relays melt "on" in my G33. Same relays, the cans can draw large current on start up and sometimes this is at the top end of the relay operating range. Old relays are more prone to it.