Designations on schematic diagrams (Mercedes-Benz S-Class W140)

Electrical Wiring Insulation Color Codes

Code	Color
BLK, BK	Black
BLU, BU	Blue
BRN, BN	Brown
GRN, GN	Green
GRY,GY	Grey
NCA	Any
ORG, OG	Orange
PNK, PK	Pink
PPL	Purple
RED, RD	Red
TAN, GD	Golden
TQ	Turquoise
VIO, VT	Violet
WHT, WH	White
YEL, YE	Yellow

Signal abbreviations and circuit designations

Characteristic	Meaning
B+	Generator output voltage (activated when the engine is running)
D+	Generator working signal (as 61)
DFA	Speed output signal
DFAHL	Left Rear VSS Output Signal
DFAVL	Left Front Wheel VSS Output Signal
DFHL	Left Rear Wheel Sensor VSS
DFVR	Right Rear Wheel Sensor VSS
GES	Speed Sensor Signal (VSS)
R50	Traction relay signal (after starter lock)
-	Minus
+	Plus
12VCD	Battery or voltage regulator voltage with engine running
15	Disconnectable battery power (served in positions 2 and 3)
15C	Disconnectable battery power (is supplied before the key is removed)
15g	Disconnectable battery power (protected by a fuse)
15R	Disconnectable battery power (served in positions 1, 2 and 3)
15u	Disconnectable battery power (not protected by a fuse)
15X	Disconnectable battery power (served in position 2)
15Z	Disconnectable battery power (served in positions 2 and 3)
30	Non-disconnectable battery power
30a	Non-disconnectable battery power
30A	Non-disconnectable battery power (side "A")
30V	Non-disconnectable battery power (side "B")
30E	Non-disconnectable battery power for electronics
30Z	Disconnectable battery power (served in positions 2 and 3)
31	Grounding
31st	Grounding for electronics
49	Interrupter signal
49a	Pulse interrupter signal
50	Starter Solenoid Signal
53	Low speed windshield wiper mode
53b	High speed windshield wiper mode
54	Brake light signal
54	Brake light chain
56a	High beam chain
56b	Low beam circuit
58	Rear Parking Light Circuit
58d	Instrument lighting
58k	Instrument lighting (unprocessed)
61	Generator working signal
61st	Generator working signal
81	Reverse gear signal
81a	Reverse gear signal (after shifting the transmission)
85	Relay control signal
85EDC	IFI Relay Control
85EDC	Relay control signal, diesel engine electronic control
85F	Horn relay control
85LP	Air Pump Relay Control
86	Relay control signal
86KR	Fuel Pump Relay Control
87	Relay output (not specified)
87ABS	ABS power supply
87EGAS	Electronic gas pedal (EA) supply voltage
87GES	Battery voltage (protected by a fuse)
87LP	Air pump supply voltage
87MOTR	Supply voltage of the ME-SFI injection system
875A	Power supply for optional equipment
87UG	Relay output (not protected by a fuse)
87Z	Relay output (protected by a fuse)
-4-	Identifies the number of the electrical wiring connected to the corresponding terminal block or connector

* An asterisk indicates a connector for which not all wires are shown.

List of abbreviations used

Russians

Characteristic	Meaning
AT	Automatic transmission
TDC	Top dead center
GUR	Power steering
D/V	Sensor switch
I/U	Executive device
K/V	Air conditioner
K/P	Switch valve
EM	Electromagnetic
E/MOTOR	Electric motor
PR-L	Fuse
Heating element	Thermoelectric heating element

Material created based on the website (www.mercedesman.ru)

Latin

Characteristic	Meaning
AB	Airbags
ABS	Anti-lock brake system
AC (A/C)	Air conditioning system
ACC	Position of the ignition key when parked with the instruments on
ACSR	Child seat installation recognition system
ADM	Interior rearview mirror with automatic "day/night" mode switching
ADS	Automatic damping suspension system
AIR (A.I.R.)	Air mixing device
AP	Gas pedal
AS	Antenna systems
ASD	Automatic differential lock
ASR	Anti-slip system
AT	Automatic transmission
ATA	Anti-theft alarm
B+	Generator output voltage (with the engine running)
BA	Reverse traffic warning
BARO	(Sensor) of atmospheric pressure
BAS	Emergency Brake Assist
BCAPC	Boost pressure compensation depending on atmospheric pressure
BDC	Bottom dead center
BF	Front passenger (Front passenger)
BLS	Brake Light Switch Sensor
BLS (NC)	Normally closed brake light switch sensor
BLS (NO)	Normally open brake light switch sensor
BM	Basic module
BPC	Barometric pressure compensation
CA	Door closer
CAN	Switched data exchange bus between the control unit and the controller of the controlled node
CAN H	Engine CAN Bus Signal High
CAN H	Engine CAN Bus Signal High
CAN IL	Low signal level of the CAN bus of internal equipment
CANL	Engine CAN Bus Signal Low
CC	Speed control system (tempostat)
CCM	Combined control module
CCS	Heated and ventilated seat
CDC	CD changer
CF	Comfort
CFI	Electronic continuous injection system
CKA	Crankshaft angle sensor
CKP	(Sensor) of crankshaft position
CL	Single lock
CLUS	Instrument cluster
CM	Control module
CMP	(Sensor) of position of the camshaft
CTEL	Cell phone
CTP	Closed throttle position (idling)
DAS	Anti-theft system with access control
DFA	Speed output signal
DFAHL	Left Rear Vehicle Speed Sensor (VSS) Output Signal
DFAVL	Front VSS Output Signal
DFHL	Left Rear VSS
DFHR	Right Rear VVS Output Signal
DFVL	Left Front VSS Output Signal
DFVR	Right Front Output Signal
DI	Direct ignition system (without distributor)
DIAG	Diagnostic connector
DIAGN	Diagnostic connector
DLC	Diagnostic connector
DM	Diagnostic module
DRL	(System) of daytime running lights
DSV	Starter Interlock Shut-Off Valve
DTC	Diagnostic code
EA	Electronic accelerator
EBR	Engine braking adjustment
ECL	(Sensor) Engine coolant level
ECM	Electronic control module
ECT	(Sensor) engine coolant temperature
ECU	Electronic control unit
EDC	Electronic control system of diesel engine
EDR	Electronic control of diesel engine
EDS	Electronic control system of diesel engine
EGR	Exhaust gas recirculation (system)
EIFI	Electronic (system) of linear fuel injection
EMSC	Steering column and rear view mirror adjustment system, heated mirrors
EPC	Electronic engine power management system
ESA	Electronic seat adjustment
ESC	Electronic ignition control
ESC	Electronic steering column adjustment
ESCM	Engine Systems Control Module
ESP	Electronic stability control system (anti-skid system)
ETC	Electronic transmission control system
ETR	Emergency seat belt tensioner
ETS	Electronic traction control system
EVAP	Fuel Evaporative Mist Recovery System
FAN	Fanfare horn
FP	Fuel pump
FSA-	Disadvantage of the hands-free system
FSA+	Plus the PA system
GES	Vehicle Speed Signal (VSS)
GIM	Governor Impulse Method
GS	Seat belt ETR
GST	Standard type fault code reader
HCS	Headlight cleaners
HFM-SFI	Sequential distributed injection/ignition system type HFM
HFS	System "Hands Free"
HHT	Handheld tester
HORN	Horn
HS	Heated seats
IAT	(Sensor) intake air temperature
IC	Instrument cluster
IDC	Integrated controller in the instrument panel
IFI	Electronic linear fuel injection system (diesel engines)
IND	Indicator
INFO	Information center
INJ	Fuel injector
INTERV	Intermittent windshield wiper operation mode
IPS	Potentiometer real parameter signal
IR	Infrared radiation
IRCL	Infrared remote control system for the operation of single lock actuators
ISC	(System) of stabilization of speed of idle
IV	Inlet valve
J/B	Connecting block (socket)
KICK-DOWN	AT mode downshifts for maximum acceleration
KS	Knock sensor
KSK	Control terminal
KSS	Knock sensor system
KU -	Coupling -
KU +	Coupling +
LA	Lamp output (preglow relay)
LED G	Green LED
LED R	Red LED
LF	Left front
LHS	Left hand drive
LH-SFI	Distributed sequential injection/ignition system type LH
LOCK	Ignition key position that locks the steering wheel
LS	Loudspeakers
LSK	Idle safety contact
M -	Minus of the electric motor
M +	Plus of an electric motor
MAF	Thermometric air mass meter based on heated film
MAP	Absolute pressure in the intake manifold
ME-SFI	ME type central injection system
ME-SFI	Sequential distributed injection/ignition system type ME
MIL	Failure warning light/ "Check engine"
MOT	Electric motor
MSC	Adjustment of rear view mirrors/steering column/heated mirrors
MSK	Throttle open position safety contact
MUTE	Mute the radio
MVA	Intake manifold vacuum control
N	Neutral position of AT
O2S	Lambda probe
OBD	(System) on-board diagnostics
OC	Secondary catalytic converter
OFF	Switch "Off" position (ignition switch)
OSB	Orthopedic seat back
OV	Exhaust valve
P	Parking position AT
P -	Potentiometer reference negative
P +	Reference positive of potentiometer
PA	Parking assistance system
PARK SW	Parking brake switch sensor
PL	Single lock
PMP	Partial preheating device for intake manifold
PNP	(Sensor switch) launch permissions
POS	Position
PS	Power steering system
PSE	Pneumatic equipment
PTS	Parktronic system
PWM	Pulse width modulation
R50	Starter Solenoid Signal (behind the starter lock switch sensor)
RCL	Remote control of a single lock
RD	Radio
REST	Engine residual heat utilization device
RF	Right front
RFCL	Radio frequency control of a single lock
RHR	Retractable rear headrests
RHS	Heated rear seats
RPM	Revolutions per minute
RR	Right rear
RTG	Retractable Luggage Compartment Latch
RTN	Return line
RTR	Remote release device for the trunk lid lock latch
RUN	Position of the ignition switch when the engine is running
RX	Reception
S	Screen
S+B	Installation-overclocking
S-B	Installation-braking
SBE	Seat belt extender
SC	Idle speed stabilization system
SFI	Sequential fuel injection system
SFI	Sequential fuel injection system
SLO	Unlocking the starter
SMS	Service Microfiche System
SN1	Unlock signal
SN₂	Lock signal
SOV	Switch valve
SPS	Speed Sensitive Power Steering (Module)
SQUIB	Security systems pyrotechnics fuse
SR	Silver
SR	Sliding and folding top hatch cover
SRS	Additional security systems (pillows and belts)
START	Position of the ignition switch when starting the engine
START	Position of the ignition switch when starting the engine
SW	Switch
T	Output temperature (preheating relay)
TAF	Auxiliary fuse for luggage compartment lid
TAV	Fuel tank ventilation valve
TB	Throttle body
TC	Turbocharger
TCM	Transmission Control Module
TD	Speed signal (Time Division)
TDC	TDC
TELE	Telescopic
TK	Door contact
TN	Non-modifiable engine speed signal
TN	Speed signal (EZL/AKR)
TNA	Reformed engine speed signal
TRAP	TRAP oxidizer
TRIP	Trip computer
TRU	Transceiver
TS	Tow sensor
TVV	Fuel tank ventilation valve
TWC	3-function catalytic converter
TX	Broadcast
ULLKS	Positive idle speed contact
USK	Positive safety contact
VAF	Volumetric air flow
VL	Left front
VR	Right front
VSS	Vehicle speed sensor/signal
WA	Retrieving saved data
WOT	Full throttle opening
Mod. ext.	(CM) Control Module