The intake air temperature sensor (IATS) is intergrated in MAF sensor. This part employs a thermistor (NTC) which is sensitive to changes in temperature.The electric resistance of a thermistor decreases as the temperature increases, and increases as the temperature decreases. The power source in the ECM is supplied to the IATS via a resistor in the ECM. The ECM judges intake air temperature by the sensor output voltage and is used for injection quantity correction, injection time correction, starting fuel quantity correction as a compensation signal.
If the IAT sensor is reading an extremely low or high intake air temperature during two driving cycles, these codes will be set
DTC NO. | Detecting Condition | Possible Cause |
C 001 C 002 | ● C 001 : Output signal < 112 mV ● C 002 : Output signal > 4.9 V ● Engine Condition : IG ON ● Fuel Limit : NO ● Fuel Cut : NO ● EGR OFF : YES ● MIL : NO ● LIMP HOME MODE Engine air temperature is fixed value of 60℃(140℉) by ECM | ● Open or short in circuit ● IATS ● ECM |
IATS | Normal Parameter | ||
Temperature | 20°C(68℉) | 40°C(104℉) | 60°C(140℉) |
Resistance | 2.29 ∼2.55 ㏀ | 1.1 ∼ 1.2 ㏀ | 0.56 ∼ 0.65 ㏀ |
