P1111

Diagnostic Chart:

Schematic:

CIRCUIT DESCRIPTION
The Intake Air Temperature (IAT) sensor is a thermistor (a variable resistor) that measures the temperature of the air entering the engine. The PCM supplies 5 volts to the IAT signal circuit through a pull-up resistor. When the intake air is cold, the PCM detects a high voltage on the IAT signal circuit. As the intake air warms, the PCM detects a lower voltage on the IAT signal circuit. If the PCM detects an intermittently high IAT signal voltage (low temperature indicated), DTC P0113 will set.

CONDITIONS FOR RUNNING THE DTC
^ ECT sensor, MAF sensor, or VSS DTCs are not set.
^ The engine has been running for at least 5 seconds.
^ The engine coolant temperature is more than 60°C (140°F).
^ The mass air flow is less than 12 g/s.
^ The vehicle speed is less than 80 km/h (48 mph).

CONDITIONS FOR SETTING THE DTC
^ The IAT Sensor signal voltage is more than 4.8 volts. This would be approximately -24°C (-12°F).
^ The condition exists for less than 1 second.

ACTION TAKEN WHEN THE DTC SETS
^ The PCM will illuminate the Malfunction Indicator Lamp (MIL) the first time the malfunction is detected.
^ The PCM will store the conditions present when the DTC set as Freeze Frame and Fail Records data.

CONDITIONS FOR CLE8RING THE MIL/DTC
^ The PCM will turn the MIL OFF during the third consecutive trip in which the diagnostic runs and passes.
^ The History DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
^ The DTC can be cleared by using the scan tool Clear DTC Information function.

DIAGNOSTIC AIDS
If the condition is intermittent, refer to Intermittent Conditions. Intermittent Conditions