Energy Diagnosis: Terminal Control
Energy Diagnosis: Terminal Control
Brief description
The voltage supply for the consumer units is delivered via various terminals. The terminal control is distributed across various control units.
Terminal 30: continuous positive
Terminal 30 is routed from the battery terminal via the safety battery terminal to the front power distribution box. As soon as the battery is connected to the terminals, terminal 30 is live.
Control units supplied by terminal 30:
CAS Car access system
DME/DDE Digital Engine Electronics/Digital Diesel Electronics
DSC Dynamic stability control (load)
DWA Anti-theft alarm system (in the FZD)
EHB Electrohydraulic brake (load)
EMF Parking brake
FRM Footwell module
JBE Junction Box electronics
KOMBI Instrument panel (as of model year 09/2009)
SZL Steering column switch cluster
VTC Valvetronic
VTG Transfer box (load)
Electric auxiliary heater
Control units supplied by terminal 30 (auxiliary battery for hybrid car):
DSM Hybrid parking lock
HIM Hybrid interface module (load only)
Terminal 30 switched: Switched continuous +
Terminal 30g is controlled by the CAS. When the vehicle is wakened by an operation of the user, terminal 30g is switched on. Terminal 30g is automatically switched off after a codable after-running period (e.g. 30 minutes). As in the case with terminal 15, a relay in the rear power distribution box and a relay in the front power distribution box is activated by the CAS via a semiconductor switch.
Control units supplied by terminal 30g (rear power distribution box):
AMPT Top HiFi amplifier (load only, as of model year 09/2009)
AMPH Hi-fi amplifier Combox Combox without telematics
DAB Digital tuner
IBOC Digital tuner US
EKPS Electric fuel pump
EHC Electronic ride height control
FKA Automatic rear air-conditioning system
KHI Headphone interface
HKL Automatic operation of tailgate
RFK Rear view camera
RSE Rear-seat entertainment
SDARS Satellite tuner
SMBF Seat module, passenger
SMFA Seat module, driver
TCU Telematics control unit
ULF-SBX Interface box
ULF-SBX-H Interface box High
VDM Vertical dynamics management
VM Video module
VTG Transfer box (electronics)
Control units supplied by terminal 30g (front power distribution box):
AL Active steering
ARS Dynamic Drive
CDC CD changer
CID Central information display
CIDCR Central Information Display Colour Rear
CON Controller
DSC Dynamic stability control (electronics)
DVD-C DVD changer
EGS Electronic transmission control
EHB Electrohydraulic brake (electronic)
FZD Roof function centre
GWS Gear selector switch
IHKA Integrated automatic heating / air conditioning system
HUD Head-Up Display
LDM Longitudinal dynamics management
LRR long-range sensor
RDC Tire Pressure Monitor
SH Auxiliary heating
VSW Video switch
Control units supplied by terminal 30g (auxiliary rear power distribution box for hybrid car):
BCM Battery monitoring module
EKK Electric A/C compressor
SBA Hybrid brake actuation changeover
TCM Hybrid gearbox control unit
TFE Hybrid pressure refuelling electronic control unit
Power electronics box
Closed-circuit current cutoff relay: Deactivation in the event of a fault:
The closed-circuit current cutoff relay is a terminal 30 that is only switched off if faults are detected. The JBE controls the closed-circuit current cutoff relay via a bi-stable relay in the rear power distribution box. The bi-stable relay can be switched on and off. As a rule, the bi-stable relay is always switched on.
Control units supplied by closed-circuit current cutoff relay (rear power distribution box):
AHM Trailer module
AMPT Top HiFi amplifier (electronics only, as of model year 09/2009)
CA Comfort access system
CCC Car Communication Computer
CIC Car Information Computer
CHAMP Multimedia platform Combox Combox with telematics
KNAV Navigation system Korea
HIM Hybrid interface module (electronics only)
JNAV Japan navigation system
KOMBI Instrument panel (before model year 09/2009)
M-ASK-NAV M-ASK navigation system
TCU Telematic Control Unit (only US with Telematic service)
Terminal 15
Control of terminal 15 is by the CAS depending on operation of the start/stop button (with the master key or ID transmitter inserted in the insertion slot). The switching of the terminal 15 occurs in the CAS via semiconductor switch. A relay in the rear power distribution box is activated via the output of a semiconductor switch.
Control units supplied by terminal 15 (rear power distribution box):
FLA High beam assistance
KAFAS Camera-based driver support systems
PDC Park Distance Control (before model year 09/2009)
TRSVC All-round vision camera
Terminal R
The CAS controls terminal R.
ACSM Crash safety module