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.

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 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

h1 {color: red;} h2 {color: green;} h3 {color: blue;} h4 {color: #FF00FF;}

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 Controller

General information The buttons can be used to open the menus directly. The Controller can be used to select menu items and enter the settings. Some iDrive functions can be operated using the touchpad on the Controller. Operation Turn to switch between menu items, for example. Press to selec

 System wiring diagram

G20 PHEV, system wiring diagram for fuel supply Integrated supply module Digital Motor Electronics (DME) Shutoff valve purge air line (only for US version) Body Domain Controller (BDC) Fuel filler flap lock Power distribution box, rear Fuel pump control electronics Hybrid pressure ref

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