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

To perform a complete test of the intake manifold air temperature sensor and its circuitry, refer to DRB tester and appropriate Powertrain Diagnostics Procedures. To test the sensor only, refer to the following:

Intake Manifold Air Temperature Sensor:

1. Disconnect wire harness connector from intake manifold air temperature sensor.

Sensor Resistance (Ohms)-Coolant Temperature Sensor/Intake Air Temperature Sensor:

2. Test the resistance of sensor with a high input impedance (digital) volt-ohmmeter. Refer to SENSOR RESISTANCE (OHMS)-COOLANT TEMPERATURE SENSOR/INTAKE AIR TEMPERATURE SENSOR chart. The resistance (as measured across sensor terminals) should be within range shown in chart. If not, replace sensor.
3. Test resistance of wire harness. Do this between PCM wire harness connector A-15 and sensor connector terminal. Also check between PCM connector A-4 to sensor connector terminal. Repair wire harness as necessary if resistance is greater than 1 ohm.