Functional Description - 2-Series (F22) - Steering System, Restraints System, Stability Control System, Tire & Wheel System, Lubrication System

• Steering System - Functional Description
  • Notes on diagnosis of the electric steering lock
  • Electromechanical Power Steering (EPS)
    • Notes
    • Brief component description
      • Notes
      • EPS unit
      • Servomotor with rotor position sensor
      • Steering-torque sensor
      • Functional networking EPS
      • ICM: Integrated chassis management
      • DME or DDE: Digital Motor Electronics or Digital Diesel Electronics
      • Instrument panel: Instrument panel
    • System functions
      • Notes
      • Servotronic
      • Active steering return
      • Active road feedback
      • Overvoltage detection and undervoltage detection
      • Overheat protection
      • Identification of overload current
      • End stop as software function
    • Notes for Service
      • Replacing a steering system
      • Steering start-up
      • Information on encoding and programming
      • Operating conditions
• Restraints System - Functional Description
  • Airbag sensors
    • Function
  • Seat belts
    • Notes
    • Belt buckle switch
  • Seat-occupancy detection, front passenger
    • Seat-occupancy detection, front passenger
    • Functional description
      • Notes
      • Structure and inner electrical connection
    • Diagnosis instructions
      • Failure of the component
    • General notes
      • Replacing the seat occupancy mat, front passenger (US version)
  • Installation position, seat occupancy electronics
    • Conductor path shifted
    • Seat occupancy mat is kinked
  • Crash safety
    • Notes
    • Brief component description
      • Notes
      • ACSM: Crash safety module
      • Front door airbag sensor, left and front door airbag sensor, right
      • Airbag sensors on left and right B-pillars
      • Airbag front sensor left and right
      • Seat belt buckle switch
      • Seat position sensor (US version)
      • Front passenger seat occupancy detection via seat-occupancy mat with pressure sensors (European version)
      • Switch for front passenger airbag deactivation (European version)
      • Front passenger seat occupancy detection via seat-occupancy mat with capacitive sensor system (US version)
      • CAS: Car Access System
      • DME or DDE: Digital Motor Electronics and/or Digital Diesel Electronics
      • ICM: Integrated chassis management
      • JBE: Junction Box Electronics
      • ZGM: Central gateway module
      • FRM: Footwell module
      • Front electronic module (FEM): Front Electronic Module
      • BDC Body Domain Controller
      • Instrument panel: Instrument panel
      • CBX-MEDIA and CBX-ECALL: Combox multimedia and Combox emergency call
      • Driver's airbag and front passenger airbag
      • Side airbag
      • Crash-active headrest
      • Head airbag
      • Knee airbag
      • Seatbelt tensioners for driver belt and passenger belt
      • Retractor tensioners for driver's seat belt and passenger belt
      • Anchor fitting tensioner
      • REMAFA resp. REMABF: Reversible electromotive automatic reel, left and right
      • Seat belt force limiter
      • Adaptive belt force limiter, front left and front right
      • Safety battery terminal
      • Airbag control lamp
      • Seat belt warning lamp
      • Indicator lamp for front passenger airbag deactivation
      • Fuel pump
    • System functions
      • Notes
      • Functional networking
      • Self-test
      • Impact detection
      • Activation the safety system
      • Message to other control units
      • Visual and acoustic seat belt warning for driver belt and passenger belt
    • Notes for Service
      • General notes
      • NB: Install only officially-approved seat covers
    • Diagnosis instructions
      • Note: Replace the Crash Safety Module after 3 crash signals followed by deployment of the safety system
    • Notes on encoding/programming
      • Note: Deactivating the acoustic seat belt warning
      • Note: Code crash safety module
    • National-market versions
      • National-market version for US
        • 2-stage driver's airbag and front passenger airbag with pyrotechnically activated discharge hole
        • Visual and audible seat belt warning
        • Enable seat occupancy mat
      • National version Japan/Gulf states
        • Visual and audible seat belt warning
  • Crash-active head restraint
    • Notes
    • Brief component description
      • Notes
      • Crash-active head restraint
      • Note: Deactivating the Crash Active head restraint with the passenger airbag deactivation feature
        • Notes
        • ACSM or MRS: Crash safety module/multiple restraint system
        • Airbag control lamp
    • System functions
      • Notes
      • Self-test
      • Impact detection
      • Activating the safety system
      • Data storage on activation of the safety system
    • Notes for Service
      • General note
  • Reversible electromotive automatic reel, left and right (REMAFA, REMABF)
    • Notes
    • Brief component description
      • Notes
      • Reversible electromotive automatic reel control unit (REMAFA, REMABF)
      • Drive reversible electromotive automatic reel
    • System functions
    • Notes for Service
      • General notes
• Stability Control System - Functional Description
  • Integrated chassis management (ICM)
    • Notes
    • Brief component description
      • Notes
      • ICM control unit
      • Ride height sensor
      • Center console operating facility
      • F15: Steering angle sensor
    • System functions
      • Notes
      • The Integrated Chassis Management system network
      • Dynamic Driving Control
      • ECO PRO mode
      • Additional function in the Integrated Chassis Management
    • Notes for Service
      • General notes
      • Diagnosis instructions
• Tire & Wheel System - Functional Description
  • Tire Pressure Monitor (RDC)
    • Notes
    • Assignment of wheels
      • Notes
      • Axle assignment
      • Identification of direction of rotation
    • RDC control unit
      • Notes
      • Structure and inner electrical connection
      • Diagnosis instructions for RDC control unit
      • Wheel electronics
      • Diagnosis instructions for the wheel electronics
      • Diagnosis instructions for service
    • National-market versions
      • USA, Canada, Europe
  • Tire pressure control
    • Notes
    • Brief component description
      • DSC control unit
      • Wheel electronics
      • Assignment of wheels
      • Remote control receiver
    • System functions
      • Functional networking
      • Diagnosis instructions for service
• Lubrication System - Functional Description
  • Oil condition sensor
    • Notes
    • Brief component description
      • Notes
      • Oil condition sensor
    • System functions
      • Notes
      • Measuring procedure
      • Electronic oil checking
    • Notes for Service
      • General notes
      • Diagnosis instructions
  • Oil level measurement
    • Overview
    • Notes
    • How the measurement works
  • Oil pressure regulating valve
    • Notes
    • Functional description
      • Notes
      • Structure and inner electrical connection
      • Nominal values
    • Diagnosis instructions
      • Failure of the component
  • Oil supply
    • Notes
    • Brief component description
      • Notes
      • Oil pressure sensor
      • Volumetric flow-controlled oil pump
      • Oil pressure regulating valve
      • Oil condition sensor
      • Engine oil cooler
    • System overview
    • System functions
      • Notes
      • Pressure circulation lubrication