Energy Diagosis Up to 09/05

Energy Diagnosis: Terminal Control Up to 09/05
The terminal control is distributed across various control modules. The following block diagram provides an overview of the control modules involved and the integration in the vehicle electrical system.






MPM Micro Power Module
CAS Car Access System
M-ASK Multi Audio System Controller
CCC Car Communication Computer
SGM Safety and Gateway Module
DME/DDE Digital Engine / Diesel Electronics
IBS Intelligent battery sensor

K-CAN SYSTEM Bus system for body functions
MOST Bus system in the area of audio and communication
byteflight Bus system for airbag control modules
PT-CAN Bus system for power train and chassis functions

There are then the following switched terminals:

Terminal 15: Controlled by the CAS depending directly on the position of the ignition key. The switch element is a semiconductor switch.
Connected control modules:
DSC sensor Sensor for Dynamic Stability Control
PDC Park Distance Control (model year 03/2003)

Note: For safety reasons, some control modules have a terminal 15 line directly from CAS, e.g. the LM (light module) or the CVM (convertible top module).

Terminal 30g: Controlled by the CAS. It is switched on when the overall vehicle is woken up by an operation on the part of the user. It is switched off after a codable after-run time when terminal R is switched off. The switch element is a relay in the distribution box.
Connected control modules:
AMP Amplifiers
ACC Active cruise control
AHL Adaptive Head Light
BZM Center console switch center
CID Central Information Display
CON Controller
CVM Convertible top module
RAD Radio (only applies to satellite receivers)
DSC Dynamic Stability Control
EGS/SMG Transmission control/Sequential Manual Transmission
EHC Ride-level control
HUD Head-Up Display
KHI Headphones interface
PDC Park Distance Control (as of model year 09/2003)
RDC Tire Pressure Monitor
RLS Rain / driving light sensor
SHD Slide/tilt sunroof
SZM Center Console Switch Center
TEL Telephone
VMV ideo module
VTG Transfer Case & Special Transmission

Terminal 30MPM: Controlled by the MPM (Micro Power Module). Normally, terminal 30MPM is always switched on. It is disconnected when a fault status is detected in the vehicle that could lead to discharge of the battery and thus to the vehicle not starting. Input variables for this include measured values processed by the DME/DDE from the IBS (intelligent battery sensor). The switching element is a bistable relay integrated in the MPM (NB: a bistable relay is a relay that retains the switch mode even without current being applied to the coil. The application of current is only necessary for changing over.)
Connected control modules:
CCC Car Communication Computer
DVDC DVD changer
M-ASK Multi Audio System Controller
CDC CD changer
NAV Navigation system

Terminal 30ASE: Controlled by the SGM (Safety and Gateway Module). It is switched on when the overall vehicle is woken up. It is switched off when the vehicle goes into in the sleep mode. Terminal 30ASE is buffered by an energy reserve integrated in the SGM. This means that the power supply to the airbag control modules can be bridged if the vehicle circuit power supply fails. The switch element is a semiconductor switch.
Connected control modules:
SBSL Satellite, B-pillar left
SBSR Satellite, B-pillar right
SFZ Vehicle center satellite (also has terminal 30)
SZL Steering column switch cluster (also has terminal 30)
TMBF Front passenger door module (also has terminal 30)
TMFA Driver door module (also has terminal 30)

Terminal 87: Controlled by the DME/DDE. It is switched on when terminal 15 is switched on and is switching off is delayed when terminal 15 is switched off. The switch element is an external relay.
Connected control modules:
VTC Valvetronic

Note: Terminal R is not present as a hardware terminal. The switch information is only communicated across the bus systems.