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Home >> Chrysler >> 2003 >> Voyager Base, 2.4 B >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.4L >> Diagnostic Tests >> DTC P0113: Intake Air Temperature Sensor High >> Testing

DTC P0113: Intake Air Temperature Sensor High: Testing

  1. Turn the ignition on. With the DRBIII(R) scan tool, read the IAT sensor voltage. Is the voltage more than 4.6 volts? If yes, go to next step. If no, see INTERMITTENT CONDITION  under SELF-DIAGNOSTICS SYSTEM.
  2. Turn the ignition off. Disconnect the IAT sensor harness connector. Turn the ignition on. Measure the voltage of the (K21) IAT signal circuit in the IAT sensor harness connector. Is the voltage more than 5.2 volts? If yes, repair the short to battery voltage in the (K21) IAT signal circuit. If no, go to next step.
  3. Turn the ignition off. Disconnect the IAT harness connector. Connect a jumper wire between the (K21) IAT signal circuit and the (K900) sensor ground circuit in the IAT harness connector. Turn the ignition on. With the DRBIII(R) scan tool, read IAT voltage. Is the voltage less than 1.0 volt? If yes, replace the IAT sensor. If no, go to next step.
    4. 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.
  4. Turn the ignition off. Disconnect the IAT sensor harness connector. 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 less than 5.0 ohms? If yes, go to next step. If no, repair the open in the (K21) IAT signal circuit.
    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 IAT sensor harness connector. Disconnect the PCM harness connectors. Measure the resistance of the (K900) sensor ground circuit from the IAT sensor harness connector to the appropriate terminal of Miller Special Tool (8815). Is the resistance less than 5.0 ohms? If yes, go to next step. If no, repair the open in the (K900) sensor ground circuit.
  6. Using the wiring diagram as a guide, inspect the wire harness and connectors. Pay particular attention to all power and ground circuits. If there are no possible causes remaining, replace and program the PCM. See PROGRAMMING  .
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