Hi, welcome to LOC :)
Not actually sure but if you have a look here for the relevant sensor, it should give you a good idea of where it's located as it has diagrams of every part and where they're located:
http://www.toyodiy.com/parts/s?v=E_1997_LE...KW&s=sensor
I'm assuming that's the right chassis number, but if not that site has all of them on there anyway :)