Energy diagnosis: Terminal control

For more information; see general functional description of the power supply:
Function selection -> Complete vehicle -> Body -> Power supply

Brief description

The power supply for the consumer units is delivered via various terminals. The terminal control is distributed across various control units:

Terminal 30: Continuous +
Terminal 30 is routed from the battery terminal via the safety battery terminal to the front 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
	DWA	Anti-theft alarm system (in the FZD)
	EHB	Electrohydraulic brake (load)
	EMF	Parking brake
	FRM	Footwell module
	JBE	Junction Box Electronics
	SZL	steering column switch cluster
	VTC	Valvetronic
	VTG	Transfer box (load)
		Electric auxiliary heater

Terminal 30g: 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 switched off automatically after a codable after-run time (e.g. 30 minutes).
As in the case of terminal 15, the CAS activates a relay in the rear distribution box and in the front distribution box across semiconductor switches.
Control units supplied by terminal 30g (rear distribution box):

	AMP	Amplifiers
	DAB/IBOC	Digital tuner / digital tuner US
	EKPS	Fuel pump control
	EHC	Electronic Height Control
	FKA	Rear heater / air-conditioning system
	KHI	Headphones interface
	HKL	Boot lid/tailgate lift
	RFK	Back-up camera
	RSE	Rear entertainment system
	SDARS	Satellite tuner
	SMBF	Seat module, front passenger
	SMFA	Seat module, driver
	TCU	Telematic Control Unit
	ULF-SBX ULF-SBX-H	Interface box Interface box High
	VDM	vertical dynamics management
	VM	Video module
	VTG	Transfer box (electronics)

Control units supplied by terminal 30g (front distribution box):

	AL	Active Steering
	ARS	Dynamic Drive
	CDC	CD changer
	CID	Central Information Display
	CIDCR	Central Information Display Color Rear
	CON	Controller
	DSC	Dynamic stability control (in the EHB)
	DVD-C	DVD changer
	EGS	Electronic gearbox control
	EHB	Electrohydraulic brake (electronic)
	FZD	Roof Function Centre
	GWS	Gear selector switch
	IHKA	Integrated automatic heating and air conditioning system
	HUD	Head-Up Display
	TPM	Tyre Pressure Monitor
	SH	Independent heating
	VSW	Video switch

Terminal 30g-f: Cutoff in the event of faults
Terminal 30g-f is a terminal 30 that is only switched off if faults are detected. The JBE controls terminal 30g-f via a bistable relay in the rear distribution box. The bi-stable relay can be switched on and off. As a rule, the bistable relay is always switched on.
Control units supplied by terminal 30g-f (rear distribution box):

	AHM	Trailer Module
	CA	Comfort Access
	CCC	Car Communication Computer
	CHAMP	Multimedia platform
	KNAV	Navigation system Korea
	KOMBI	Instrument cluster
	JNAV	Navigation system China
	M-ASK-NAV	M-ASK navigation system
	TCU	Telematic Control Unit (only US with Telematic service)

Terminal 15:
The CAS controls terminal 15 depending on actuation of the start-stop button (with remote control inserted or identification sensor in the slot).
Terminal 15 is activated in the CAS via semiconductor switches. A relay in the rear distribution box is activated via the output of a semiconductor switch.
Control units supplied by terminal 15 (rear distribution box):

	FLA	High beam headlight assistant
	PDC	Park distance control