BMW 3 Owners & Service Manuals

BMW 3: System wiring diagram

Fuel supply
G20 PHEV, system wiring diagram for fuel supply

  1. Integrated supply module
  2. Digital Motor Electronics (DME)
  3. Shutoff valve purge air line (only for US version)
  4. Body Domain Controller (BDC)
  5. Fuel filler flap lock
  6. Power distribution box, rear
  7. Fuel pump control electronics
  8. Hybrid pressure refuelling electronic control unit (TFE)
  9. Fuel tank isolation valve (only for US version)
  10. Electric fuel pump
  11. Pressure/Temperature sensor
  12. Fuel tank isolation valve (only for European version)
  13. Fuel tank shutoff valve (only for US version)
  14. Lever sensor for fuel level
  15. Advanced Crash Safety Module (ACSM)
  16. Power window motor, driver's side (supply for LED refuelling button )
  17. Refuelling button
  18. Instrument cluster (KOMBI)
  19. Power distribution box, front left

In the event of a crash, the fuel pump control electronics immediately disconnect the power supply to the fuel pump drive. The fuel pump control electronics receive the information for this from the Advanced Crash Safety Module ACSM.



    The pressurized fuel tank must be vented before refuelling. To initiate the refuelling procedure, the button in the driver's door first needs to be operated. The button is not active when the vehicl

     Automatic transmission


    The automatic transmission GA8P75HZ of the G20 PHEV, which is based on the transmission introduced in the F07 at the end of 2009 (GA8HP70Z), is also manufactured by ZF. If you have already take


     Data protection

    Data transfer Concept The vehicle offers different services, whose use requires a data transfer to BMW or a service provider. The data transfer can be deactivated for some services. General information When the data transfer is deactivated, the respective service cannot be used. Only make these se

     Wiper system

    General information Do not use the wipers if the windshield is dry, as this may damage the wiper blades or cause them to become worn more quickly. Safety information Warning If the wipers start moving in the folded away state, body parts can be jammed or damage may occur to parts of the vehicle. Th

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