Test NTC-13: Checking Intake Air Temperature Sensor
NOTE:
For circuit identification, see WIRING DIAGRAMS article. After each repair procedure has been completed, reconnect all components. Perform TEST VER-5 to ensure system is functioning properly. Ensure no DTCs are present before performing this test. When performing this test, DO NOT allow more than 5 minutes between measuring temperature of intake air temperature sensor with scan tool and measuring the air temperature on inside of intake manifold with temperature probe.
NOTE:
Vehicles equipped with a 2.7L engine are equipped with a Manifold Absolute Pressure (MAP) sensor and a separate Intake Air Temperature (IAT). Vehicles equipped with a 3.2L and 3.5L engine are equipped with an Intake Air Temperature/Manifold Absolute Pressure (IAT/MAP) sensor. For this test, IAT/MAP will be identified as IAT sensor.
- Turn ignition on. Using scan tool, read INTAKE AIR TEMP DEG value. Turn ignition off. Remove Intake Air Temperature (IAT) sensor. See Fig 1 or Fig 2 . Using a temperature probe, measure air temperature inside sensor opening in intake manifold. If IAT sensor reading is within 10°F (-12°C) of air temperature probe reading, reinstall IAT sensor and go to next step. If IAT sensor reading is not within 10°F (-12°C) of air temperature probe reading, replace IAT sensor.
- Turn ignition off. Visually inspect related connectors and wiring harness for damage. Repair connectors and wiring harness as necessary. If connectors and wiring harness are okay, reconnect all connectors. Start engine. Wiggle IAT sensor connector and wiring harness while monitoring scan tool display. If GOOD TRIP counter display count changes to "0", repair connector or wiring harness where wiggling caused display to change. If GOOD TRIP counter display count does not change to "0", no problem is indicated at this time. Test is complete.