BMW 3 Owners & Service Manuals

BMW 3: Electrical Heating

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 Installation locations and connections

G20 PHEV, heater circuit Electric coolant pump Connection to the coolant circuit Heat exchanger for heating system Electrical heating Electrical changeover valve Connections at the elect

 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.

 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

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 Cooling

The Electrical Machine Electronics and convenience charging electronics (KLE) are cooled by the low- temperature coolant circuit. G20 PHEV, low-temperature coolant circuit (schematic diagram) Radiator (coolant/air heat exchanger) Electric Motor Electronics (EME) Convenience charging electronic

 Start-up system

Starter motor The combustion engine B46 can be started via the conventional starter motor and the electrical machine. The following table shows when and under which conditions the respective start option is used: Auxiliary battery G20 PHEV, auxiliary battery Safety battery terminal 2 (SB

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