BMW 3: Electrical Heating
BMW 3 Series G20 (2018-2025) Training manual / 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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Electrical connections
The high-voltage battery unit also has a signal connection, as well as the
high-voltage connection.
The high-voltage battery unit is integrated in the refrigerant circuit in order
for it to be cooled.
Connections of the SP41 high-voltage battery
Venting unit
Signal connector
Connections for
Indicator light on the interior
mirror
The indicator light flashes briefly every 2 seconds:
The alarm system is switched on.
Indicator light flashes for approx. 10 seconds,
then it flashes briefly every 2 seconds:
Interior motion sensor and tilt alarm sensor
are not active, as doors, hood, or trunk lid are
not correctly closed.
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