Parked Car Ventilation

PARKED CAR VENTILATION







The parked car ventilation feature of the E38 IHKA system is retained on the E39 IHKA system. The feature is only available with the High BC. The signal to activate the venting function is generated by the BC function of the IKE. The signal is passed over the K-Bus to the IHKA for fan and flap activation.

The signal prompts the IHKA to open the face vent flaps to 100%. The blower relay is energized and the blower output stage is sent a 4 volt signal. The blower is run at 7 volts operating power to provide adequate venting.

If battery voltage drops below 11.5 volts the function is cancelled.