Link Engine Management - Air Temperature Sensors

This is a critical sensor for forced air applications or where optimum engine operation is required.

Using  an  inlet  air  temperature  sensor  allows  fuel   and  ignition  corrections to be made for changes in the temperature of the air  entering the engine.  The air temperature sensor must be setup to most  accurately measure the temperature of the air entering the combustion  chambers of engine. 

On a naturally aspirated engine this normally  means any position between the air filter and inlet manifold.  However,  on a turbocharged/supercharged engine the sensor must be placed  AFTER the turbocharger and any intercooler.

On most applications (both naturally aspirated and turbocharged) the  recommended mounting position is in the inlet pipe just before the  throttle plate.  The sensor may also be placed in a section of the inlet  manifold that is subject to high airflow.  However, in some applications the inlet manifold may get very hot and heat soak the sensor causing a  reading that is not representative of the air entering the combustion  chambers.

It is very important on a turbocharged/supercharged engine that the air  temperature sensor can react fast enough to track the rapidly changing  temperature.  For this reason, an open element sensor is required.  The  recommended sensor is a Bosch 0 280 130 085.  

On naturally  aspirated engines this sensor may be substituted for a 0 280 130 039,  which is cheaper and easier to fit.

Link ECU's are designed to measure temperature using a  thermistor sensor.  These sensors have a resistance that changes with  temperature and are commonly used in automotive applications. 

When  wiring thermistor sensors the polarity is NOT important.  

The Inlet  Temperature Sensor  must be connected to the Sensor Ground  wire and Atemp wire. Link ECU's are compatible with any thermistor sensors.   The  default calibration is for either of the Bosch sensors listed above.  In  order to use a sensor with a different calibration you will need to know  how the sensor’s resistance changes with temperature and enter this  information into the ECU via PCLink. 

Note that most commonly  used sensors calibrations are available by selecting them in PCLink.

Inlet Air Temperature Sensor Description	Part #
NPT 3/8 Sensor - tapered thread	IAT
Steel Mounting Boss	IATMS
Aluminum Mounting boss	IATMA
Bosch bolt in sensor	IATB
Steel Mounting Boss	IATBS
Aluminum Mounting Boss	IATBA
14mm Sensor - tapered thread	IAT14
Steel Mounting Boss	IAT14S
Aluminum Mounting Boss	IAT14A