the filter is inside the fuel tank. it is a lifetime filter and should only be replaced by a trained technician if you suspect you got dirty gas from the station. You must remove the negative terminal from the battery, and remove the rear seat to access the filter. under the rear seat is a black metal plate. if it has screws, remove them if on screws, pry it up with a screwdriver. careful with the wires. Once you remove the 8mm bolts for the fuel pump, remove it carefully not to bend or break the sender. after that, you will see the filter and where is seperates from the pump. Once again, I strongly recommend a trained technician do the job, and only if you think you got dirty gas. good luck.
For my 2002 Echo it is 3.7 Liters with a filter change.
The 2002 Toyota Echo OBD 2 port is under driver side dash next to kick panel
It is conveniently located inside the fuel tank :)
Right next to the air filter.
Inside the fuel (petrol) tank.
In the gas tank. I have 2001 Echo.
http://pdftown.com/2000-2002-Toyota-Echo-Service-Manual.html
Pretty sure its the same as the 2000 Toyota echo, see related link.
It doesn't use a Map sensor , it use a MAF sensor , and it is located right on top of the Air filter box
3.5 liters
3.6 liters
To flush the coolant in a 2002 Toyota Echo you will need to drain it first. Flush with fresh water and then refill with coolant and distilled water.