P0113

Diagnostic Chart:

Wiring Diagram:

The intake air temperature (IAT) sensor is a thermistor located in the air intake passage of the air induction system on the engine. When the sensor is cold it has a high resistance, the resistance decreases as the temperature of the sensor increases. The PCM supplies a five volt signal to the sensor which is also connected to ground. The PCM reads the voltage drop on the sensor signal line to determine air temperature.

DTC PARAMETERS
DTC P0113 will set if the IAT reading is lower than -30°C (-22°F) when:
^ Engine run time is greater than 10 seconds.
^ Vehicle speed less than 24 km/h (15 mph).
^ No VSS DTC has been set.
^ Airflow less than 16 gm/sec.

P0113 will set if conditions are met for about six seconds.

IMPORTANT: The IAT signal is continuously checked when ignition is On.

NOTICE: A short to B+ on circuit 472 will cause damage to the IAT sensor. If 472 is found to be shorted, test sensor for proper resistive value per table at the end of this section.

DIAGNOSTIC AIDS
Refer to Description and Operation in this manual for Temperature vs. Resistance chart.
^ This DTC may be set if the vehicle has been in extremely cold ambients -35°F (-370°C). Ask the customer if this has occurred.
^ IAT may be compared to ECT temperature, with a Scan tool, if engine has been cooled overnight at ambient temperature. They should be within four degrees of each other with ignition On and engine Off.