Temperature Sensor No. 1 (Intake Air Temperature) Check

This sensor is located underneath the air cleaner housing. Prior to testing, ensure sensor contacts are clean.
1. With ignition Off, disconnect multiple pin plug from ECU.
2. With temperature sensor wire connector attached, connect suitable ohmmeter test leads across ECU connector terminals 10 and 22. Resistance should be as follows:
a. With temperature at 32° F, resistance should be 4400 - 6800 ohms.
b. With temperature at 75° F, resistance should be 1400 - 3600 ohms.
c. With temperature at 104° F, resistance should be 900 - 1300 ohms.
3. If resistance values are not as specified, test again at sensor. If resistance values are now satisfactory, check wiring between sensor and ECU. If resistance values are not satisfactory, replace sensor.