Air Temperature Sensor ( Ambient / Intake ): Testing and Inspection

Fig. 5 Intake Air Temperature Sensor And MAP Sensor:

NOTE: To perform a complete test of this sensor and its circuit, SEE System Diagnosis/Diagnostic Charts.

To test the sensor only, refer to the following:
1. With the key off, disconnect wire harness connector from the intake air temperature sensor Fig. 5.
2. Connect a high input impedance (digital) volt-ohmmeter to the sensor terminals. The ohmmeter should read as follows:
- Engine/Sensor at room temperature around 70°F ohmmeter should read approximately 7,000 to 13,000 ohms.

3. Test the resistance of the wire harness between the PCM connector terminal 37 and the sensor harness connector. Also check for continuity between PCM connector terminal 43 and the sensor harness connector.
- Refer to Electrical Diagrams for circuit information.
- If the resistance is greater than 1 ohm, repair the wire harness as necessary.