PREMAIR Sensor (Certain Markets Only) (2006-)
The function of the Premair sensor is to meet legal requirements for low emission variants. The sensor is located on the radiator.
The sensor measures the temperature of the radiator and transmits the value, together with a check of its own condition, to the Engine control module (ECM). During the engine's warm-up phase the Engine control module (ECM) carries out a number of checks of the received information in order to determine the status of the sensor and the radiator.
The sensor communicates with the Engine control module (ECM) via LIN (Local Interconnect Network) communication, a standardized serial communication method. Transmitted information is encrypted.
The Premair sensor is diagnosed by the Engine control module (ECM). The sensor is secured to the radiator and cannot be replaced separately.