BMW 3 Owners & Service Manuals

BMW 3: Installation locations and connections

BMW 3 Series G20 (2018-2026) Training manual / Electrical Heating / Installation locations and connections

Installation locations and connections
G20 PHEV, heater circuit

  1. Electric coolant pump
  2. Connection to the coolant circuit
  3. Heat exchanger for heating system
  4. Electrical heating
  5. Electrical changeover valve

Installation locations and connections
Connections at the electric heating

  1. Coolant feed line (from the electric coolant pump)
  2. Coolant feed line (to the heat exchanger for heating system)
  3. Coolant temperature sensor
  4. Equipotential bonding line connection
  5. Signal connector (low-voltage connector)
  6. Coolant temperature sensor connection
  7. High-voltage connector connection
  8. Housing

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     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

     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

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     Dual-mass flywheel

    In order to reduce fuel consumption and CO2 emissions, high-charged engines are used, the number of cylinders is reduced and the drivable speeds are lowered. However, with these measures the torsional vibrations of the crankshaft are increased as a result of the acceleration during the work cycle

     Functional requirements

    Compatible device, with Bluetooth interface. The vehicle key is in the vehicle. The device is ready for operation. Bluetooth is switched on in the vehicle and on the device. The pairing readiness is displayed on the Control Display. Bluetooth presettings, such as visibility, may be requir

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