RX7 2RTR-1308cc 1.3L MFI (1991)
Intake Air Temperature Sensor: Description and Operation
In Air Flow Meter/Sensor
Air Flow Meter
This Intake Air Thermosensor is an integral part of the airflow meter. It is a thermistor device whose resistance changes with temperature. By sending a
reference voltage and comparing it to voltage received from the sensor, the ECU can calculate an electrical value for air temperature. The input signal is
utilized by the ECU in it calculations for these outputs:
Fuel injection quantity
Fuel pump resistor relay
Sensor resistance is checked at airflow meter terminals "E2" and "THA":
K OHMS
AIR TEMP.
10 - 20
-20°C / -4°F
4 - 7
0°C / 32°F
2 - 3
20°C / 68°F
.9 - 1.3
40°C / 104°F
.4 - .7
60°C / 140°F