The intake air temperature sensor (provided on the air flow sensor on all engines, except the 1995–98 2.0L non-turbo) is a resistor which measures the intake air temperature. The ECU will determine the intake air temperature according to the output voltage from the sensor, and compensates the fuel injection amount according to the intake air temperature.
| Fig. 1: Location of the intake air temperature sensor
(integral with the volume air flow sensor) — 1990–94
vehicles
|
| Fig. 2: On 1995–98 2.0L non-turbo engines, the
IAT sensor is mounted on the intake plenum
|
When the intake air temperature sensor is faulty, it controls the fuel injection amount based on an intake air temperature default of 77°F (25°C). The driveability of the vehicle may become poor during cold temperature operation. The trouble may not be noticeable when the ambient temperature is around 77°F (25°C).
