Mercedes S-Class W-220

since 1998 release

Repair and operation of the car



Mercedes W220
+ Mercedes-Benz cars of the class S (W220)
+ Operation manual
+ Routine maintenance
+ Engine
+ Cooling system and heating
+ Power supply system and release
+ Engine electric equipment
- Automatic transmission
   Problems of the block of electronic control and the operating signals
   Search of malfunctions - the general information
   Removal and the AT installation with the hydrotransformer
   The AT electrohydraulic control unit (AT is established)
   Dismantling and assembly of the electrohydraulic control unit
   Dismantling and assembly of a plate of gear shifting
   Case of transmission and hydrotransformer
   Multidisk brakes of V2, VZ and gear wheel of blocking at "Parking"
   Dismantling and assembly of a back hollow shaft with the back coupling of a free wheeling
   Removal and installation of a multidisk brake B1 and oil pump
   Dismantling and assembly of the oil pump
   Dismantling and assembly of a multidisk brake of B1
   Dismantling and assembly of a multidisk brake of B2
   Dismantling and assembly of an output shaft with the central and back block of planetary gear wheels
   Removal and installation of multidisk couplings K1, K2 and K3
   Dismantling and assembly of coupling of K1
   Dismantling and assembly of the leading shaft with coupling by K2 and the forward block of planetary gear wheels
   Dismantling and assembly of coupling of K3
   The blocking mechanism at "parking"
   Removal and installation of the lever of the selector of gear shifting
+ Power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Schemes of electric equipment






Problems of the block of electronic control and the operating signals

Entrance and output signals of the AT 722.6 control unit and tire of data exchange of CAN

N15/3 — the ETC Control unit
X11/4 — the DLC Socket
Y3/6b1 — ATF temperature Sensor
Y3/6n2 — the RPM meter 2
Y3/6n3 — the RPM meter 3
Y3/6s3 — Contact of blocking of a starter
Y3/6u1 — the Electromagnetic valve of management of modulations of pressure
Y3/6u2 — the Electromagnetic valve switchings
Y3/6u3 — the Electromagnetic valve of switchings 1-2 and 4-5
Y3/6u4 — the Electromagnetic valve of switching 3-4

Y3/6u5 — the Electromagnetic valve of switching 2-3
Y3/6u6 — the Electromagnetic PWM valve of blocking of the hydrotransformer

A1 — the Control panel
CAN — the Tire of a motive compartment
N3/10 — the ME-SFI [ME] Control unit
N15/3 — the ETC Control unit
N15/5 — the Control unit of the electronic lever of switching
N47 — the traction control system Control unit
N73 — the EIS Control unit


Tasks

The ETC (N15/3) control unit determines the current working parameters of the vehicle and exercises control of consecutive gear shifting, proceeding from simplicity of switching and parameters of the movement.

Activation of electromagnetic valves of switching is carried out at the command of the ETC (N15/3) control unit. The required size of pressure is calculated on the basis of the entering data and necessary adjustment adjustment of the transferred torque.

Is exposed to processing the following data arriving from other systems:

ME-SFI (N3/10)/CDI control unit (N3/9)

· The torque developed by the engine;
· Gear shifting;
· Emergency operation;
· Functioning of a tempostat;
· Activation of system of restriction of speed;
· Functioning of a starter;
· Activation of the kickdown mode (as on models 01.06.02)
· Working parameters of the engine.

Control unit of the electronic lever of switching (N15/5)

· Position of the lever;
· Sensor switch of the modes of transmission (S16/5);
· Sensor switch of activation of the kickdown mode (S16/6) (till 31.05.02)

Control unit of the traction control system (N47)

· Frequency of rotation of wheels;
· Torque of brake mechanisms;
· Fact of squeezing of a pedal of a foot brake;
· Condition of the parking brake.

EIS [EZS] control unit (N73)

· Condition of contact plugs;
· Transmission option.
Control panel (A1)
· Position of the lever of the selector / the chosen transfer.

Control unit of the traction control system (N47)

· Transmission option;
· Information on the chosen transfer.

ME-SFI (N3/10)/CDI control unit (N3/9)

· The torque developed by the engine;
· Emergency operation;
· Activation of the mode of the movement;
· Position of the lever of the P/N selector;
· Sensor switch of the modes of transmission (S16/5)
· Transmission option.