General Information

Engine Control
P0112 Intake Air Temperature Sensor 1 Circuit Low Input - General Information

Component Location





General Description

The Intake Air Temperature Sensor (IATS) is installed into the Mass Air Flow Sensor (MAFS). The IATS uses a thermistor whose resistance changes with the temperature. The electrical resistance of the IATS decreases as the temperature increases, and increases as the temperature decreases. The 5 V power source in the ECM is supplied to the IATS via a resistor in the ECM. That is, the resistor in the ECM and the thermistor in the IATS are connected in series. When the resistance value of the thermistor in IATS changes according to the intake air temperature, the signal voltage also changes. Using this signal, the information of the intake air temperature, the ECM corrects basic fuel injection duration and ignition timing.

DTC Description

If measured temperature is lower than the maximum threshold value during 1 sec, ECM sets DTC P0112.
(In this case, the input signal voltage is the minimum threshold value.)

DTC Detecting Condition





Specification





Diagnostic Circuit Diagram