Mercedes C-Class

W203 since 2000 of release

Repair and operation of the car



Mercedes-Benz
+ Mercedes-Benz cars of class C (W-203)
+ Operation manual
+ Routine maintenance
+ Engine
+ Cooling system and heating
+ Power supply system and release
+ Engine electric equipment
+ Manual transmission
- Automatic transmission
   Specifications
   - The automated box of gear shifting 716.6
      Elements of hydraulic management automated by the Sequentronic check point
      Elements of electronic control and signals of the control unit automated by the Sequentronic check point
   + Automatic transmission 722.6
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment







Elements of electronic control and signals of the control unit automated by the Sequentronic check point

Analog entrance signals of the Sequentronic control unit

and — Working food
s — the Operating food
B56 — the Sensor of pressure automated by the check point
B56/1 — the transfer definition Sensor
S17/3 — the Contact sensor switch of the left forward door
B53 — the coupling course Sensor
B52 — the coupling rotation frequency Sensor
C. 87 (C. 15) — A contour of giving of food 87 from a chain of the relay 87, the chassis (N10/1kK) in the forward SAM (N10/1) control unit protected by a safety lock of 55 (N10/1f55)
C. 30 — the Contour of giving of food 30 from the forward SAM (N10/1) control unit, 61 (N10/1f61) protected by a safety lock
1 — the Switch of the consecutive choice of transfers

Data exchange of control units on the switched tire of data of CAN


Analog output signals of the Sequentronic control unit

Y90 — the Valve of the hydraulic release device of coupling
Y91 — the Electromagnetic valve of braking of the check point
Y92/1 — the Electromagnetic valve of switchings 1, 3, and 5
Y92/2 — the Electromagnetic valve of switchings R, 2, 4 and 6
X11/4 — the DLC Socket via the SAM (N10/1) control unit
M46 — ASG Hydraulic pump via the operating ASG relay (N10/1kN) in the SAM (N/10/1) control unit protected by a safety lock of 58 (N10/1f58)
Connection is possible via CAN tire
vigatelny compartment (CAN C):
A1 — the Control panel
N3/10 — the ME-SFI Control unit
N3/9 — the Control unit CDI
N47-5 — the ESP/BAS Control unit
N73 — the EIS [EZS] Control unit

Analog output signals

Purpose of the control unit of switching of the check point (N15/6):

· Definition of the working conditions;
· Processing of the entering CAN signals;
· Calculation of working variables;
· Activation of actuation mechanisms;
· Preservation and issue of diagnostic data;
· Processing of the entering analog signals.

Only the N15/6 control unit is capable to make calculation of parameters of switching on the basis of the analysis of the analog signals arriving from information sensors of definition of the chosen transfer, the frequency of rotation of coupling, the course of coupling, request for switching and hydraulic pressure.

The 12+2-contact and 18-contact socket of the control unit is fixed by safety clips.

The main functions of management of ASG are stored in the modular program ECU code where each task is allocated in the separate block. Nevertheless, the interdependence taking place define connectivity of functioning of network.

The period of circulation of blocks is defined by the frequency of the processor and makes about 10 ms.

Information transferred by the control unit of switching of the check point (N15/6) on CAN tire

ME-SFI (N3/10)/CDI control unit (N3/9):
· Emergency stop of the engine;
· Current transfer;
· The required transfer;
· Mode of emergency functioning of transmission;
· The creeping torque;
· Switching in manual control mode;
Control panel (A1):
· Current transfer;
· Transmission mode;
· Messages on mistakes/refusals.
ESP/BAS(N47-5) control unit:
· Transmission option;
· Current transfer;
· The required transfer.
Information accepted by the control unit of switching of the check point (N15/6) with CAN tire
Control panel (A1):
· Opening/closing of a driver's door;
· Temperature of external air.
ME-SFI (N3/10)/CDI control unit (N3/9):
· Provision of a pedal;
· Emergency operation;
· Functioning of a tempostat;
· Idling turns;
· Activation of the limiter of speed;
· Activation of the limiter of turns of the engine;
· Inertial cut-off of supply of fuel;
· Torque of the engine;
· Oil temperature.
Forward SAM (N10/1) control unit:
· Awakening function;
ESP/BAS(N47-5) control unit:
· Frequency of rotation of wheels;
· Sensor switch of stoplights;
· Parking brake;
· A signal for the ESP control unit.
EIS (N73) control unit:
· Condition of contact plugs.