BMW 3 Owners & Service Manuals

BMW 3: Operating principle

If the driver adjusts a desired temperature at the IHKA controls, the IHKA calculates a corresponding nominal temperature and compares it to the actual output temperature of the electrical heating.

There is a coolant temperature sensor at the electrical heating output for this purpose. This way the IHKA control unit can decide whether the heat from the combustion engine is sufficient to heat the passenger compartment or whether the electrical heating should be switched on. If the temperature of the coolant is too low, the electric heating can heat up to a total of 6 stages. The electrical heating is always condition-based thanks to this control operation.


 Low coolant temperature

When the coolant temperature is low, for example after driving off, or in all-electric driving, the electric changeover valve is activated by the Body Domain Controller (BDC). The electrical changeo

 Antifreeze and corrosion inhibitor

The cooling system of the G20 PHEV is filled with the new antifreeze and corrosion inhibitor Frostox HT-12. The new antifreeze and corrosion inhibitor increases the long-term stability and corrosion

 B46TU-B48TU Engines

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 High-beam Assistant

Concept The high-beam Assistant detects other traffic participants early on and automatically switches the high beams on or off depending on the traffic situation. General information The high-beam Assistant ensures that the high beams are switched on, whenever the traffic situation allows. In the l

 Driving Dynamics Control

Concept The Driving Dynamics Control influences the driving dynamics properties of the vehicle. The vehicle can be adjusted depending on the situation using various driving modes. General information The following systems are affected, for instance: Engine characteristics. Steptronic transmissio

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