Sub tank low fuel indicator?

[MalcomM Senior Member Find all posts View Profile Close MalcomM]

Hi

Can anyone tell me if the 90's sub fuel tank gauge has a 'low fuel level' indicator in it?

Mine doesn't seem to but maybe a blown bulb or something. Don't want to pull it all apart if it hasn't got one anyway :-)

[GreenVX Junior Member Find all posts View Profile Close GreenVX]

No it doesnt have a low level warning lamp, there is one on the main gauge though. The thinking behind this seems to be that toyota expects you to have run through the fuel in the main tank first in which case that warning lamp would be on and now that your running on the sub tank every time you look down at your dash the lamp should remind you that one tank is already empty.

However if your like me and often drive using the sub tank first then there is no warning other than your eyes that its getting low.

[fido666 Banned Find all posts View Profile Close fido666]

I vaguely recall reading something in the manual saying not to run the sub tank below 1/4 full too.

[MalcomM Senior Member Find all posts View Profile Close MalcomM]

Thanks for that
I thought that would be the case. I also run through the sub every 2nd or 3rd tank but have come close to empty recently which made me wonder.

Think I might empty the sub via the drain plug and then refill it with 10 liters and see where the gauge rests.
Shouldn't be too hard to detect the resistance value of the sender at that point and use that to trigger a change in color of the sub tank gauge LED.
Or maybe I'll do nothing... :-)