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Diagnostic Test

WARNING: This page is about a different car, the 2013 Dodge Avenger and 2013 Chrysler 200. However, it is still accessible from the selected car via links, so may be relevant.
  1. ACTIVE DTC 
    1. Turn the ignition off.
    2. If possible, allow the vehicle to sit with the ignition off for more than 480 minutes in an environment where the temperature is consistent and above -7°C (19.4°F).
    3. Test drive the vehicle. The vehicle must exceed 48 km/h (30 mph) during the test drive. Do not cycle the ignition off when the test drive is completed.
    4. With the scan tool, select View DTCs.

      Is the DTC Active or Pending at this time?

      Yes 

      • Go To  3

      No 

      • Go To  2
  2. INTAKE AIR TEMPERATURE 
    1. Turn the ignition off.
    2. Allow the vehicle to sit with the ignition off in an environment where the temperature is consistent and above -7°C (19.4°F) until the engine coolant temperature is equal to ambient temperature.
    3. Turn the ignition on.
    4. With the scan tool, compare the AAT, ECT and IAT sensor values.

      Is the Intake Air Temperature Sensor value within 10°C (18°F) of the other two sensor values?

      Yes 

      No 

      • Go To  3
  3. IAT SENSOR VOLTAGE 
    1. Turn the ignition off.
    2. Disconnect the Intake Air Temperature Sensor harness connector.
    3. Turn the ignition on.
    4. With the scan tool, read the Intake Air Temperature Sensor voltage.
      NOTE:

      The sensor voltage should be approximately 5.0 Volts (plus or minus 1 Volt) with the connector disconnected.

      Does the scan tool display the voltage as described above?

      Yes 

      • Go To  4

      No 

      • Go To  5
  4. IAT SENSOR 
    Fig 1: Checking IAT Sensor Circuit
    GC0150057Courtesy of CHRYSLER GROUP, LLC
    1. With the scan tool, read the IAT voltage.
    2. Connect a jumper wire between the (K21) IAT Signal circuit and the (K900) Sensor ground circuit in the IAT Sensor harness connector.
      NOTE:

      The sensor voltage should be approximately 0.0 Volts (plus or minus 1 Volt) with the jumper wire in place.

      Does the scan tool display the voltage as described above?

      Yes 

      • Verify that there is good pin to terminal contact in the IAT Sensor and Powertrain Control Module connectors. Replace the IAT Sensor if no problems were found with the connectors.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  5
        NOTE:

        Remove the jumper wire before continuing.

  5. EXCESSIVE RESISTANCE IN THE (K21) IAT SIGNAL CIRCUIT 
    Fig 2: Checking IAT Signal Circuit For An Open Or Excessive Resistance
    GC0150055Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the PCM C2 harness connector.
    3. Measure the resistance of the (K21) IAT Signal circuit between the IAT Sensor harness connector and the PCM C2 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  6

      No 

      • Repair the open or excessive resistance in the (K21) IAT Signal circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  6. EXCESSIVE RESISTANCE IN THE (K900) SENSOR GROUND CIRCUIT 
    Fig 3: Checking For Open Or Excessive Resistance In Sensor Ground Circuit
    GC0150056Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance of the (K900) Sensor Ground circuit between the IAT Sensor harness connector and the PCM C2 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  7

      No 

      • Repair the open or excessive resistance in the (K900) Sensor ground circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  7. POWERTRAIN CONTROL MODULE (PCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the IAT Sensor and the Powertrain Control Module (PCM).
    2. Look for any chafed, pierced, pinched or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Intake Air Temperature Sensor and Powertrain Control Module connectors.
    4. Perform any Technical Service Bulletins that may apply.

      Were there any problems found?

      Yes 

      • Repair as necessary.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

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