Caldinas (ST215s) don't have an air flow sensor. They have a MAP sensor which is located on the passenger side of the intake manifold. Its identified by its purple sticker.
You can get a refurbished one for about $70. See: http://lmgtfy.com/?q=toyota+echo+mass+airflow+sensor
5x114.4
31manifold and/or airflow meter sensor signal circuit--airflow meter/circuit--manifold pressure sensor/circuit--ecu
its part of the mass airflow sensor screwed into the airbox assembly.
It is inside the Mass Airflow Sensor (MAF sensor), IN OTHERS WORDS IS PART OF THIS.
248km/h
its part of the mass airflow sensor bolted to the airbox.
It does not have a mass airflow sensor.It does not have a mass airflow sensor.
It does not use a mass airflow sensor.It does not use a mass airflow sensor.
It does not have a mass airflow sensor.It does not have a mass airflow sensor.
1990 TOYOTAS HAVE VANE AIRFLOW METERS
The mass airflow sensor is located on top of the airbox (air filter housing). It has a plug with maybe 6 wires in it and is held in place with 2 Phillips head screws.