Functional Description (F55 & F56)

• 12 V Power Socket
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Failure of the component
• 6-Speed Automatic Transmission And 8-Speed Automatic Transmission
  • AISIN 6-speed automatic transmission and 8-speed automatic transmission with electronic transmission control (EGS)
  • Brief component description
    • Notes
    • 6-speed automatic transmission or 8-speed automatic transmission
    • Electronic transmission control (EGS)
    • Selector lever and gear indicator light
    • Shift elements and planetary gear sets
    • Torque converter
    • Parking lock
    • Emergency release
  • System functions
    • Notes
    • Functional networking
    • Automatic engine start-stop function (MSA)
    • Coasting at idle
  • Notes for Service Technicians
    • Automatic transmission fluid
• Accelerator Pedal Module
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Specifications and characteristic curve
  • Diagnosis instructions
    • Failure of the component
• Active Sound Design
  • Active Sound Design (ASD)
  • Electrical engine sound
  • Brief component description
    • Active sound design
    • Hi-Fi amplifier
    • Top Hi-Fi amplifier and High End Hi-Fi amplifier
  • System overview
  • System functions
    • Notes
    • Electronic power-up
  • Notes for Service Technicians
    • Component replacement
    • Diagnosis
  • Functional description
  • Structure and inner electrical connection
    • Notes
    • Nominal values
  • Diagnosis instructions
    • Failure of the component
• Adaptations
  • Notes
  • Examples of various adaptations
    • Mixture adaptation
    • Variable camshaft timing control (VANOS) adaptation values
    • Fuel system
    • Adaptation of the Valvetronic stroke
    • Idle speed adjustment
    • Adaptation of the increment wheel
• Adaptations And Equipment Variations
  • Notes
  • Examples of various adaptations
    • Mixture adaptation
    • Mixture adaptation at idle (additive)
    • Mixture adaptation at partial load (multiplicative)
    • Tank venting adaptation
    • Idle speed adjustment
    • Adaptation of the increment wheel
• Additional Brake Light
  • Notes
  • Functional description
  • Structure and inner electrical connection
    • Notes
    • Nominal values
  • Diagnosis instructions
    • Notes
    • Function check of the component
• Adjustment, Consumption Calculation
  • Notes
  • Adjustment function
  • Application
  • Determining fuel consumption
• Adjustment Drive
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Failure of the component
• Aerial Amplifier And Aerial Diversity Module
  • Notes
  • Functional description
  • System overview
  • Diagnosis instructions
    • Failure of the component
• AGM Battery
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • General notes
    • Charge
• Airbag Sensor, Left B-Pillar
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Specifications and characteristic curve
  • Diagnosis instructions
    • Failure of the component
• Airbag Sensor, Right B-Pillar
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Specifications and characteristic curve
  • Diagnosis instructions
• Airbag Sensor, Front Left Door
  • Notes
  • Functional description
  • Structure and inner circuit
  • Target values
  • Diagnosis instructions
    • Failure of the component
• Air Conditioning Compressor
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Protective function during blocked air conditioning compressor
• Air Conditioning Compressor (Electrical)
  • Notes
  • Functional description
  • Structure and inner electrical connection
    • Notes
    • Nominal values
  • Diagnosis instructions
    • Failure of the component
• Air Distribution Flap Motor
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
• Air Intake Systems
• Air Supply
  • Notes
  • Brief component description
    • Intake air temperature charging pressure sensor (if available)
      • Notes
      • Intake-air temperature sensor
      • Boost pressure sensor
    • Intake pipe pressure sensor (if available)
    • Electromotive throttle actuator
    • Exhaust turbocharger with electrical wastegate valve
    • Hot film air mass meter
  • System functions
    • Calculation of air mass
• Alarm System
  • Anti-theft alarm system and sirens with tilt-alarm sensor
  • Brief component description
    • Notes
    • Roof function center (FZD) with ultrasonic interior movement detector
    • Emergency power siren with tilt sensor
    • Bonnet contact switch
    • Tailgate/tailgate lock
    • Door locks on driver's and passenger's sides
    • Door contact at the top rear left and top rear right (I01)
    • Door contact at the bottom rear left and bottom rear right (I01)
    • Alarm system LED
  • System functions
    • Notes
    • Functional networking
    • Activating and deactivating
    • Triggering the DWA alarm (alarm trigger signal)
    • Undervoltage detection, overvoltage detection, monitoring the battery
    • Switch off interior monitoring and tilt monitoring
    • Emergency function for the acoustic DWA alarm
    • Crossover control by means of lock barrel and master key
    • Panic mode in US and Japanese national versions
  • Notes for Service Technicians
    • General notes
  • Diagnosis instructions
    • Reading out the alarm memory
• All-Round Vision Camera
  • All-round vision camera (Top Rear Side View Camera - TRSVC)
  • Brief component description
    • Notes
    • Center console operating facility
    • Exterior mirror camera
    • Bumper camera
    • Rear view camera
    • TRSVC: Control unit for all-round vision camera
  • System functions
    • Notes
    • Functional networking
    • Display
  • Notes for Service Technicians
    • General notes
    • Diagnosis instructions
• Alternator
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Characteristic curve and setpoint values
  • Diagnosis instructions
    • Failure of the component
• Audio Control Panel
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Failure of the component
• Audio Test Cd
  • Notes
  • Description of the audio test CD
  • Geometric characteristics of CDs and DVDs Shape of the CD
  • Border of the CD
  • Visual characteristics of CDs and DVDs
• Automated Coolant - Cooling System Bleeding Routine
• Automatic Air RECIRCULATION Control Sensor
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
• Automatic Engine Start-Stop Function
  • Notes
  • Brief component description
    • Automatic engine start-stop function button
    • Starter motor
    • Alternator
    • AGM battery
    • Intelligent battery sensor
    • Bonnet contact switch
    • Seat belt buckle contact
    • Gear sensor on manual gearbox
    • Clutch module, manual transmission
    • Electromechanical transmission oil pump for automatic transmission
  • System functions
    • Displays
    • Power management
    • Engine shutdown
    • Engine start
    • Safety functions
  • Notes for Service Technicians
    • Power management and battery exchange
    • Diagnosis instructions
• Automatic Luggage Compartment Lid Actuation
  • Automatic operation of tailgate (HKL)
  • Brief component description
    • HKL: Control unit automatic operation of tailgate
    • Central information display
    • BDC Body Domain Controller
    • boot lid lifting drive or spindle drive
    • ID transmitter
    • Rear lid button, passenger compartment
    • Rear lid button, exterior
    • Rear lid button on inner tailgate
    • Automatic Soft Close drive, tailgate
  • System overview
  • System functions
    • Safety functions
      • Notes
      • Multiple requests
      • Identifying the position
      • Blockage identification
      • Repeat interlock
      • Blocking conditions
      • Power interruption or reset while boot lid/tailgate is opened
      • Emergency operation
    • Notes for Service Technicians
    • Replacing the control unit for automatic operation of tailgate
    • Replace spindle drives
    • Failure of automatic luggage compartment lid actuation control unit
• Automatic Start/Stop Function: History Memory Part 1 Of 2
• Automatic Start/Stop Function: List Of Start Inhibitors
  • Notes
  • Instructions for reading the start inhibitor
• Automatic Start/Stop Function: List Of Switch-Off Inhibitors (2)
• Automatic Test For Detecting Coking On The Intake Port And Incorrect Camshaft Timing In The Test Procedure For Misfiring
• Automatic Test For Detection Of Carbon Deposits In The Intake Ports In The Test Module For Misfire
  • Notes
  • Test procedure
• Auxiliary Coolant Pump
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Characteristic curve and setpoint values
  • Diagnosis instructions
    • Failure of the component
    • Function check of the component
• Aux-In Connection With USB Port
  • Notes
  • Functional description
  • No import via the USB interface
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Function check of the component
• Backrest Heating For Driver And Passenger
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Failure of the component
    • General notes
• Base Plate
  • Notes
  • Functional description
    • Notes
    • Video connection for smartphones
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
• Base Plate Fan
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Failure of the component
    • Function check of the component
• Battery Management Electronics
  • Battery management electronics (SME)
  • Functional description
  • Switch-off of the high-voltage electrical system in the event of an accident
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Failure of the component
• Behavior Of The Radiator Fan
  • Noticeable symptoms: Behavior of the radiator fan
• Blower Motor
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Failure of the component
    • General notes
• Blower Output Stage
  • Notes
  • Functional description
  • Structure and inner electrical connection
    • Notes
    • Nominal values
  • Diagnosis instructions
    • Failure of the component
    • General notes
• Blow-Off Valve
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Schematic overview and setpoint values
  • Diagnosis instructions
    • Failure of the component
• BLUETOOTH Aerial
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Diagnosis instructions
    • Failure of the component
• Body Domain Controller
  • Body Domain Controller (BDC)
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Failure of the component
• Brake Fluid Level Switch
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Failure of the component
• Brake Pad Wear Sensor, Front Left
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Measurement procedure and target values
  • Diagnosis instructions
    • Failure of the component
    • Service functions
• Brake Pad Wear Sensor, Rear Right
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Measurement procedure and target values
  • Diagnosis instructions
    • Failure of the component
    • Service functions
• Brake Pedal Travel Sensor
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Diagram and setpoint values
  • Diagnosis instructions
    • Failure of the component
    • General note
• Brake Vacuum Sensor
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Characteristic curve and setpoint values
  • Diagnosis instructions
    • Failure of the component
• Bus Systems
  • Bus system analysis
    • Notes
    • Overview of the bus systems
    • Body CAN, K CAN
    • Body CAN2, K CAN2
    • Powertrain CAN, PT CAN
    • Powertrain CAN2, PT CAN2
    • Ethernet
    • FlexRay
    • MOST bus system
  • Possible faults in bus systems
• Calibration Of Consumption Indicator
  • Notes
  • Calibration function
  • Application
  • Determining fuel consumption
• Camera-Based Driver Assistance Systems
  • Camera-based driver support systems (KAFAS)
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • General notes
    • Failure of the component
  • Brief component description
    • Notes
    • operating facility for light, turn signal/high beam switch as well as the operating facility for assist systems
    • Camera-based driver support systems camera
    • KAFAS: Control unit for camera-based driver support systems
    • Vibration actuator in the steering wheel
  • System functions
    • Notes
    • Functional networking
    • Urban traffic accident prevention
    • Preventive pedestrian protection
    • Lane departure warning
    • High-beam assistant
    • Road sign recognition
    • Collision warning
    • Automatic braking for the recognition of stationary vehicles
    • Overtaking ban
    • System limits
  • Notes for Service Technicians
    • General notes
    • Diagnosis instructions
• Camera-Based Driver Support Systems
  • Camera-based driver support systems (KAFAS)
  • Brief component description
    • Notes
    • Turn signal/high beam switch and operating facility for assist systems
    • Video camera
    • KAFAS: Control unit for camera-based driver support systems
    • Vibration actuator in the steering wheel
  • System functions
    • Notes
    • Functional networking
    • High-beam assistant
    • Lane departure warning
    • Road sign recognition
    • System limits
  • Notes for Service Technicians
    • General notes
    • Diagnosis instructions
• Camera-Based Driver Support Systems Camera Heating
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
• Camera For Lane Departure Warning
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • General notes
    • Failure of the component
• Can Terminator
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Failure of the component
• Car Sharing Module
  • Car sharing module (CSM)
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Failure of the component
• CBS Correction, Tester Data
• CBS Reset
  • Overview
  • Notes
  • Sequence of the procedure
• CBS Service Inclusive Selection
  • Description of the contents of the test module CBS Service Inclusive
    • Notes
    • Sequence of the procedure
• CBS Vehicle Data Correction
  • Overview
  • Notes
  • Sequence of the procedure
• CBX-ECALL Perceived Symptoms: Repair, Maintenance
  • Problems during repair work, programming, maintenance, pre-delivery check
• CBX-ECALL Perceived Symptoms: Telematics And Online Services
  • Problems executing services in the vehicle
• CBX-Media: Customer-Initiated Software Update (KISA)
  • Overview of possible faults during a customer-initiated software update (KISA)
• CBX-Media Perceived Symptoms: BLUETOOTH Pairing
  • Problems with Bluetooth pairing and connection
• CBX-Media Perceived Symptoms: IPHONE And IPOD
  • Problems with iPhone and iPod
• CBX-Media Perceived Symptoms: Repair, Maintenance
  • Problems during repair work, programming, maintenance, pre-delivery check
• CBX-Media Perceived Symptoms: Snap-In Adapter
  • General information on use of the snap-in adapter
  • Problems when charging mobile phone, snap-in adapter
• CBX-Media Perceived Symptoms: SVS Active Voice Recognition
  • Problems with the Active Voice Recognition system
• CBX-Media Perceived Symptoms: Telephone Functions
  • Problems when telephoning (inadequate voice quality, poor reception quality...)
• CBX-Media Perceived Symptoms: USB Functions
  • Problems with the USB port in the center console
• Cd/DVD Changer: Quality Check
• Cd Changer And DVD Changer
  • CD changer/DVD changer audio/video (CDC/DVDC)
  • Brief component description
    • CD changer/DVD changer audio/video (CDC/DVDC)
    • Head unit (CCC/radio/MASK and successor) with controller
    • MOST bus
  • System functions
    • Notes
    • Mounting/damping
    • Playback
    • change
    • Muting
  • Notes for Service Technicians
  • Malfunctions caused by poor-quality or damaged CDs/DVDs
  • Faults with transparent CDs/DVDs
  • Manufacturing defects
  • Warpage
  • Faulty "Eject" function
  • Checking CD/DVD changer for scanning faults
• Cell Block
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
• Cell Supervision Circuit
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
• Central Information Display
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Failure of the component
    • Display for a fault
• Central Instrument
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Failure of the component
    • Function check
• Central Locking Button, Driver's And Front Passenger Door
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Failure of the component
• Central Locking Drive, Charging Socket
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Failure of the component
    • Function check of the component
• Central Locking Drive, Charging Socket Cover
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Failure of the component
    • Function check of the component
• Central Locking Drive, Fuel Filler Flap
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Failure of the component
    • Function check of the component
• Central Locking Drive Engine, Tailgate
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Failure of the component
• Central Locking System
  • Notes
  • Brief component description
    • BDC Body Domain Controller
    • Central locking button
    • Central locking drives
    • Tailgate/tailgate lock
  • System functions
  • Functional networking of the central locking system
  • Contact-free tailgate opening
  • Notes for Service Technicians
    • Diagnosis instructions
• Center Console Control Panel
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Failure of the component
• Center Console Operating Facility
  • Notes
  • Functional description
    • Notes
    • Drive experience switch
    • DTC button = DSC OFF
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Failure of the component
• Chafe Marks On DDE Wiring Harness On B37 And B47
• Characteristic Map Thermostat
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Temperature profile and setpoint values
  • Diagnosis instructions
    • Failure of the component
• Charge Air Temperature Charging Pressure Sensor
  • Notes
  • Functional description
    • Boost pressure sensor
    • Charge-air temperature sensor
  • Structure and inner electrical connection
  • Characteristic curve and setpoint values
  • Diagnosis instructions
    • Failure of the component
• Charge-Air Temperature Sensor
  • Notes
  • Functional description
  • Structure and inner electrical connection
  • Characteristic curve and setpoint values
  • Diagnosis instructions
    • Failure of the component
• Charging Interface Module
  • Charging interface module (LIM)
  • Functional description
  • Structure and inner electrical connection
  • Nominal values
  • Diagnosis instructions
    • Failure of the component