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via electro-hydraulically controlled actuators. This allows for a clutchless manual trans-
mission which can be shifted via a pair a paddle shifters on the steering wheel or by a
console mounted shifter which is a electronic input to the SMG control unit. This system
was introduced on the E46 M3 in 2002 and subsequently added to the E85, E46, E60.
E63 and E64.
(German: Sequenzielles MGetriebe or Sequenzielles Manuelles (Schalt-)Getriebe)
SRS
Supplemental Restraint System - This system refers to the airbag systems used on
BMW vehicles. It is also a generic automotive industry term for vehicles with airbags.
SSBF
Seat Satellite, Passenger - The SSBF is a satellite on the byteflight system used on the
E65/E66. The satellite is used to actuate igniter circuits for the front passenger airbag
and the active head restraint. The SSBF also contains the seat occupancy electronics
and receives input from the SBE sensor electronics. The input for the belt buckle switch
is also monitored by the SSBF. It is located under the front seat next to the seat module.
(German: Satellit Beifahrersitz).
SSFA
Seat Satellite, Driver - SSFA provides the same functions as the SSBF. The SSFA is
used for the driver s side functions. Refer to SSBF. (German: Satellit Fahrersitz)
SSH
Seat Satellite, Rear - This is a satellite module which is located under the rear seat on an
E65/E66. It is only used in conjunction with vehicles which have the rear side airbag
option. This module communicates with the SIM via byteflight.
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Glossary
STVL
Door Satellite, Front Left - this is a satellite module used on byteflight based passive
safety systems. It is mounted on the door, and contains crash sensing devices as well as
pressure sensors to detect impacts by measuring pressure in the door cavity. It is used
on the E65, E85, E60, E63 and E64. The STVL functions are slightly different depend-
ing upon vehicle application. (German: Satellit Tür Vorne Links)
STVR
Door Satellite, Front Right - See STVL, this sensor is the same as STVL but installed on
the right door. (German: Satellit Tür Vorne Rechts)
SULEV
Super Ultra-low Emissions Vehicle
SZL
Steering Column Switch Center- This SZL is a satellite module used as the interface
between the steering wheel electronics (and airbag igniter circuits) and the SIM/SGM via
byteflight. (German: Schaltzentrum Lenksäule )
SZM
Switching Center Center Console - The SZM provides switching functions on various
vehicles. The SZM is connected to the K-Bus and processes switch functions for sys-
tems such as DSC, RDW, Seat Heating etc. The SZM is located in the center console
below the radio and IHKA control units. The SZM provides switch commands to these
systems via a bus telegram. (German: Schaltzentrum Mittelkonsole)
T
TCU
Telematics Control Unit - The TCU allows for integration of cellular phones into BMW
vehicles. Variations of the TCU also have integrated GPS for location of the vehicle in the
event of an accident. The TCU is used in conjunction with BMW emergency call and
SOS systems. This term can be used in conjunction with TEL as well.
TMBF
Door Satellite, Passenger Door - This is a satellite module which is part of the byteflight
bus. This module is used on the E60, E63 and E64. In addition to crash detection and
pressure sensing devices, the TMBF also contains electronics for body electronic func-
tions such as power windows and door locks. (German: Tur Modul beifahrer)
TMFA
Door Satellite, Driver - This module performs the same functions as TMBF, but is located
on the driver s side. (German: Tur Modul Fahrer)
18
Glossary
U
URSS
(German: Uberroll Schutz System) - See Rollover Protection System
V
VANOS
Variable Camshaft Control - The VANOS system allows for variable timing control of the
camshaft. (German: Variable Nocken-Steuerung or Variable Nockenwellen-Steuerung)
VVT
Variable Valve Timing - VVT is an alternative (generic) term for Valvetronic.
(German: Variable Ventiltrieb)
W
X
Y
Z
ZAE
Central Activation Electronics - ZAE is an early passive safety system which succeeded
the Siemens/Cipro systems in 1993. The main feature of this system is the integration of
the crash sensing elements into one central housing which eliminates the fender mount-
ed mechanical crash sensors. This system was introduced in 1993 and phased out in
the 1997 model year and succeeded by the MRS systems.
(German: Zentrale Auslöse Elektronik)
ZCS
Central Coding Key - This is a special 37-digit code used to code modules to specific
vehicles. It is usually located electronically in the instrument cluster and in an additional
module for redundancy. The code contains information about the vehicle options and
equipment level (i.e. AC or No AC, Auto or manual trans, engine size etc.) This method
of coding modules will eventually be replaced by the FA code (or vehicle order).
19
Glossary
ZGM
Central Gateway Module - The ZGM is a gateway module used in the E65/E66. It pro-
vides a gateway between the various bus systems and the diagnostic interface. All D-bus
communication is funneled through the ZGM which acts as a traffic cop between these
various systems. On some vehicles such as the E85, E60, E63 and E64. There is no
separate ZGM, however the ZGM functions have been incorporated into the SIM/SGM.
(German: Zentral Gateway Modul)
ZKE
Central Body Electronics - The ZKE system is responsible for controlling various body
electronic functions. Systems such as power windows, power locks, wipers, and sunroof
are some of the items controlled. ZKE systems usually consists of a central module
referred to as the GM (General Module). The GM acts as the main system controlled and
bus master. There are numerous variations of ZKE. The systems and sub-systems
which are part of ZKE will vary between models. (German: Zentrale Karosserieelektronik)
ZWD
Idle Control Valve (two winding) - This is a type of idle control valve which uses two
opposing windings. The windings are supplied with a common power source and each
winding has it s own ground circuit controlled by the ECM. One winding is for closing the
idle valve while the other is used for the opening of the idle valve. These two opposing
windings are ground controlled using a PWM signal. In order to control the idle, the ECM
will apply a greater PWM duty cycle to one of the windings. For example, to increase the
idle speed, the ECM would apply an increased duty cycle to the opening winding.
(German: Zweiwicklungs-(Leerlauf-)Drehsteller) (Translation - Two winding idle rotary
actuator)
20
Glossary
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