BMW 3: Operating principle
BMW 3 Series G20 (2018-2024) Training manual / Electrical Heating / 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
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h2 {color: green;}
h3 {color: blue;}
h4 {color: #FF00FF;}
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USB connection
General information
Mobile devices with a USB port are connected to
the USB interface.
Mobile phones.
Audio devices such as MP3 players.
USB storage devices.
Common file systems are supported. FAT32
and exFAT are the recommended formats.
A connected USB storage device will be supplied
with ch
Emergency wheel
Concept
In the event of a flat tire, the emergency wheel
can be used in place of the wheel with the defective tire. The emergency wheel
is only intended
for temporary use until the defective tire/wheel
has been replaced.
General information
Mount one emergency wheel only.
Also check the tire infla
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