BMW 3: Installation locations and connections
BMW 3 Series G20 (2018-2025) Training manual / Electrical Heating / Installation locations and connections
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G20 PHEV, heater circuit
- Electric coolant pump
- Connection to the coolant circuit
- Heat exchanger for heating system
- Electrical heating
- Electrical changeover valve
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Connections at the electric heating
- Coolant feed line (from the electric coolant pump)
- Coolant feed line (to the heat exchanger for heating system)
- Coolant temperature sensor
- Equipotential bonding line connection
- Signal connector (low-voltage connector)
- Coolant temperature sensor connection
- High-voltage connector connection
- 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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Displays and operation
The function does not have any separate display or operating elements. The
function is only available
in the HYBRID ECO PRO driving mode. The function cannot be deactivated.
Recuperation is displayed as usual in the instrument cluster below the
drive-ready state indicator
(CHARGE area).
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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