Should be at the bottom of the radiator, somewhere on the passenger side.
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.
hi i have smal question,how to change thermostat in Toyota echo 2000 thanks
http://pdftown.com/2000-2002-Toyota-Echo-Service-Manual.html
The 2002 Toyota Echo OBD 2 port is under driver side dash next to kick panel
At the bottom of the big black metal container near the front underside of the car, slightly to the passenger side of the car.
For my 2002 Echo it is 3.7 Liters with a filter change.
3.6 liters
The radiator sensor in a Toyota Echo is typically located near the radiator itself, often positioned on the radiator or in the upper or lower radiator hose. This sensor monitors the temperature of the coolant to help regulate the engine's temperature. If you need to access it, make sure the engine is cool and follow the vehicle's service manual for specific instructions.
To replace the radiator on a Toyota Echo, start by draining the coolant from the radiator and disconnecting the negative battery terminal. Remove the hoses connected to the radiator, then unbolt the mounting brackets or clips holding the radiator in place. Lift the old radiator out and install the new one, reconnecting the hoses and refilling the cooling system with coolant. Finally, reconnect the battery and check for leaks before starting the engine.
i have a 2001 and it gets about 39-42 mpg
See related link.
See related link.