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Auxiliary Fan K-Bus Interface




Auxiliary Fan







The auxiliary fan stage (speed) is determined from the refrigerant pressure sensor signal.
The IHKS signals the ECM via the K-bus, and the ECM will activate the auxiliary fan.
The fan stage (speed) is generally set to 0 at vehicle speeds above 50 mph (ram air)

K-bus Interface

This interface transmits data such as the vehicle speed, engine speed and diagnosis between the IHKS control unit and the IKE.

The K-bus is also used to transmit compressor load values as well as auxiliary fan request from the IHKS through the IKE then over the can line to the ECM.