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:

AHM Trailer module
AMPH Hi-fi amplifier (as of model year 09/2010)
CAS Car access system
DME/DDE Digital Engine Electronics/Digital Diesel Electronics
EPS electromechanical power steering
FRM Footwell module
JBE Junction Box electronics
KOMBI Instrument panel (as of model year 12/2008)

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 of terminal 15, a relay in the power distribution box is activated by the CAS via a semiconductor switch.

Control units supplied by terminal 30g:

AMP Amplifiers
CDC CD changer
CID Central information display
CON Controller
CVM Convertible top module
DAB/IBOC Digital tuner / digital tuner US
DSC Dynamic stability control
EGS Electronic transmission control
IHKA Integrated automatic heating / air conditioning system
IHKS Standard heating and air conditioning
IHR Integrated heating control
RAD Radio
RAD2 BMW professional radio
RDC Tire Pressure Monitor
RLS Rain/rain/light sensor
SDARS Satellite tuner
SHD Slide/tilt sunroof
SZL Steering column switch cluster
ULF-SBX Interface box
ULF-SBX-H Interface box High
VM Video module

Closed-circuit current cutoff relay: Deactivation in the event of a fault:
Closed-circuit current cutoff relay is a terminal 30 that is only switched off if faults are detected. The JBE controls closed-circuit current cutoff relay via a bistable relay in the power distribution box. The bi-stable relay can be switched on and off. As a rule, the bi-stable relay is always switched on. The relay closed-circuit current cutoff relay is only fitted with High equipment, e.g. if the Car Communication Computer (CCC) was ordered.

Control units supplied by closed-circuit current cutoff relay:

CA Comfort access system
CCC Car Communication Computer
KOMBI Instrument panel (before model year 12/2008)
CHAMP Headunit
RAD Radio (as of model year 09/2010)
RAD2 Radio 2 (as of model year 09/2010)

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 power distribution box is activated via the output of a semiconductor switch.

Control units supplied by terminal 15:

PDC Park distance control

Terminal R
The CAS controls terminal R.

MRS Multiple restraint system