Component Testing
- Ignition OFF, disconnect the harness connector of the IAT sensor.IMPORTANT: A thermometer can be used to test the sensor off the vehicle.
- Test the IAT sensor by varying the sensor temperature while monitoring the sensor resistance. Compare the readings with the Temperature Versus Resistance table and verify that the resistance is within 5 percent of the specification. If the resistance vs. temperature is not within 5 percent, replace the IAT sensor.