BMW 3 Owners & Service Manuals

BMW 3: Low-voltage Vehicle Electrical System

BMW 3 Series G20 (2018-2025) Training manual / Low-voltage Vehicle Electrical System

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 Voltage supply

The 12 V vehicle electrical system of the G20 PHEV is essentially the same as the electrical system of the G20. The main difference lies in the fact that the power supply is no longer by the al

 Start-up system

Starter motor The combustion engine B46 can be started via the conventional starter motor and the electrical machine. The following table shows when and under which conditions the respective start

 Terminal control for driving readiness

Terminal control from driver's view Vehicle condition - DRIVING Vehicle condition - RESIDING Vehicle condition - PARKING Transitional condition for establishing driving readiness, ending driv

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 Split cooling

Split cooling is a new development for the B46TU engine. This cooling concept is a modified version of which is already used in the N63TU2. The Split Cooling function uses the electrical Split Cooling Valve (SCV), to enable on-demand decoupling of the crankcase from the coolant flow both in the w

 Introduction

The "charging" procedure for an electric vehicle corresponds to "refuelling" a conventionally driven vehicle. Accordingly, in this chapter "charging" means: Charging the high-voltage battery unit during operation. Charging procedure via a charging cable. As a charging cable is used, one also re

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