LEMON Manuals: Even more car manuals for everyone
Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> External Pages >> Different car >> Section 200 (DTCS P0016 To P0128, Intermittent Condition, Checking Exhaust System, Temperature Sensors, Power & Ground Circuits) >> P0113-Intake Air Temperature Sensor Circuit High >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2007 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
  1. 1) IAT SENSOR VOLTAGE ABOVE 4.98 VOLTS 

    Ignition on, engine not running.

    With a scan tool, read the Intake Air Temperature Sensor voltage.

    Is the voltage above 4.98 volts? 

    Yes 

    1. Go to  2).

    No 

    1. Refer to INTERMITTENT CONDITION .
    2. Perform POWERTRAIN VERIFICATION TEST .
  2. 2) IAT SENSOR 
    Fig 1: Checking IAT Sensor
    GC0041562Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the Intake Air Temperature Sensor harness connector.

    Connect a jumper wire between the (K21) IAT Signal circuit and the (K900) Sensor ground circuit in the IAT Sensor harness connector.

    Ignition on, engine not running.

    With a scan tool, read the IAT Sensor voltage.

    Is the voltage below 1.0 volt with the jumper wire installed? 

    Yes 

    1. Replace the IAT Sensor.
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Go to  3).
      NOTE: Remove the jumper wire before continuing.
  3. 3) (K21) IAT SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE  
    Fig 2: Measuring Voltage At The IAT Signal Circuit
    GC0041567Courtesy of CHRYSLER LLC

    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? 

    Yes 

    1. Repair the short to battery voltage in the (K21) IAT Signal circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Go to  4).
  4. 4) (K21) IAT SIGNAL CIRCUIT OPEN  
    Fig 3: Measuring Resistance Of The IAT Signal Circuit
    GC0041563Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the PCM harness connector.

    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.

    Measure the resistance of the (K21) IAT Signal circuit from the IAT Sensor harness connector to the appropriate terminal of special tool #8815.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go to  5).

    No 

    1. Repair the open in the (K21) IAT Signal circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .
  5. 5) (K900) SENSOR GROUND CIRCUIT OPEN 
    Fig 4: Measuring Resistance Of The Sensor Ground Circuit
    GC0041564Courtesy of CHRYSLER LLC

    Measure the resistance of the (K900) Sensor ground circuit from the IAT Sensor harness connector to the appropriate terminal of special tool #8815.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go to  6).

    No 

    1. Repair the open in the (K900) Sensor ground circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .
  6. 6) PCM 
    NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage or terminal push out. Repair as necessary.

    Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.

    Were there any problems found? 

    Yes 

    1. Repair as necessary.
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Replace and program the Powertrain Control Module per Service Information.
    2. Perform POWERTRAIN VERIFICATION TEST .
scientia non olet · About LEMON Manuals