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Home >> Dodge and Ram >> 2003 >> Durango Base, 5.9 Z, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Engine Controls - Self Diagnostics - 4.7L) >> Diagnostic Tests >> DTC P0110: Intake Air Temp Sensor Performance & DTC P0111: Intake Air Temp Sensor Performance >> Testing

DTC P0110: Intake Air Temp Sensor Performance & DTC P0111: Intake Air Temp Sensor Performance: Testing

WARNING: This page is about a different car, the 2003 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Inlet air temperature sensor may also be referred to as intake air temperature sensor.
  1. Turn ignition on, engine not running. With the DRBIII® scan tool, read DTCs and record the related freeze frame data. Is the Good Trip counter equal to zero? If yes, go to next step. If no, see INTERMITTENT CONDITION  under SELF-DIAGNOSTIC SYSTEM.
  2. Turn the ignition off. Disconnect the IAT sensor harness connector. Visually inspect the related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals. Ignition on, engine not running. Measure the voltage on the (K21) IAT signal circuit in the IAT sensor harness connector. Is the voltage above 5.2 volts? If yes, repair the (K21) IAT signal circuit short to battery voltage. If no, go to next step.
  3. Turn the ignition off. Disconnect the IAT sensor harness connector. Ignition on, engine not running. With the DRBIII® scan tool, read the IAT sensor voltage. Is the voltage above 4.6 volts? If yes, go to next step. If no, go to step  7.
  4. Disconnect the IAT sensor harness connector. Connect a jumper wire between the (K21) IAT signal circuit and the (K4) sensor ground circuit in the IAT sensor harness connector. With the DRBIII® scan tool, read the IAT sensor voltage. Is the voltage below 1.0 volt? If yes, replace the IAT sensor. If no, go to next step.
    NOTE: Remove the jumper wire before continuing.
    5. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool (8815) to perform diagnosis.
  5. Turn the ignition off. Disconnect the PCM harness connectors. Measure the resistance of the (K21) IAT signal circuit from the IAT sensor harness connector to the appropriate terminal of Miller Special Tool (8815). Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the open in the (K21) IAT signal circuit.
    6. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool (8815) to perform diagnosis.
  6. Measure the resistance of the (K4) sensor ground circuit from the IAT sensor harness connector to the appropriate terminal of Miller Special Tool (8815). Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the open in the (K4) sensor ground circuit.
  7. Turn the ignition off. Disconnect the PCM harness connectors. Measure the resistance between ground and the (K21) IAT signal circuit in the IAT sensor harness connector. Is the resistance below 100 ohms? If yes, repair the short to ground in the (K21) IAT signal circuit. If no, go to next step.
  8. Measure the resistance between the (K4) sensor ground circuit and the (K21) IAT sensor signal circuit at the IAT sensor harness connector. Is the resistance below 5.0 ohms? If yes, repair the (K4) sensor ground circuit shorted to the (K21) IAT signal circuit. If no, go to next step.
    9. NOTE: Before continuing, disconnect the PCM harness connectors and check the related wiring terminals for corrosion, damage or terminal push out. Repair as necessary.
  9. There are no possible causes remaining, replace PCM. Program the new PCM. See PROGRAMMING .
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