Indicator light on 1999 Toyota Sienna

I have an indictor light that has been on for a couple of days, no one seems to know what it means. It is beside the ABS light, it looks like a tire with some type if "arrow" inside pointing outwards. It is just above and the right of the low washer fluid light. Can you tell me what it is telling me to check?

Asked by for the 1999 Toyota Sienna
Is this it?
This is the low tire pressure warning system light. Check the tire pressure in all the tires, including the spare tire.
Here is some info about issues with this system: