GF27.10-P-0001AHV Automatic Transmission (AT), Function
GF27.10-P-0001AHV Automatic Transmission (AT), Function
TRANSMISSION 722.930 in MODEL 204.0 /2 /3
Block diagram
A1 Instrument cluster
A1e58 Engine diagnosis indicator lamp
A1p12 Gear display
A1p13 Multifunction display
A1p16 Transmission mode display
B37 Accelerator pedal sensor
CAN B Interior CAN
CAN C Drive train CAN
CAN D Diagnostic CAN
CAN E Chassis CAN
L6/1 Left front axle speed sensor
L6/2 Right front axle speed sensor
L6/3 Left rear axle speed sensor
L6/4 Right rear axle speed sensor
LIN B11 AMG DRIVE UNIT LIN
LIN E1 Steering LIN
N3/10 ME-SFI [ME] control unit
N10/1 Front SAM control unit with fuse and relay module
N15/5 Electronic selector lever module control unit
N30/4 Electronic Stability Program control unit
N73 Electronic ignition switch control unit
N80 Steering column module control unit
N135 Steering wheel electronics
N145 Transmission mode control unit
S9/1 Stop lamp switch
S110/1 Steering wheel downshift button
S111/1 Steering wheel upshift button
S192 Transmission mode rotary switch
X11/4 Diagnostic connector
Y3/8b1 Wet clutch oil pressure sensor
Y3/8n1 Turbine wheel rpm sensor
Y3/8n2 Internal transmission speed rpm sensor
Y3/8n3 Output shaft rpm sensor
Y3/8n4 Fully integrated transmission control control unit
Y3/8s1 Selection range sensor
Y3/8s2 Transmission oil temperature sensor
Y3/8y1 Working pressure control solenoid valve
Y3/8y2 Clutch control solenoid valve K1
Y3/8y3 Clutch control solenoid valve K2
Y3/8y4 Clutch control solenoid valve K3
Y3/8y5 Multidisk brake control solenoid valve B1
Y3/8y6 Multidisk brake control solenoid valve B2
Y3/8y7 Multidisk brake control solenoid valve B3
Y3/8y9 Wet clutch control solenoid valve
Automatic transmission (AT), general
Transmission 722.9 is an electronically controlled automatic transmission with 7 forward gears and 2 reverse gears. The gear ratios for the gear ranges are achieved by planetary gear sets. All the transmission functions and components for this transmission are combined in one assembly module
Integrating the fully integrated transmission control controller unit (Y3/8) in the transmission minimizes the number of interfaces to the wiring harness.
Service life can be increased, fuel consumption reduced, gearshift comfort improved and maintenance intervals revised by using optimized transmission components and a new automatic transmission fluid and by reducing working pressure and implementing software modifications.
The transmission can be subdivided into the following assemblies
- Wet clutch with torsional damper
- Oil pump for generating the necessary oil pressure and for reliable lubrication of the actuators and bearing points
- Oil cooling system for optimized short-term carrying off of heat
- Transmission housing with mechanical transmission components (planetary gear sets, parking lock, multidisk clutches and multidisk brakes) and fully integrated transmission control controller unit
Data is exchanged with the following control units over the drive train CAN:
- ME-SFI [ME] control unit
- Transmission mode control unit
- Electronic selector lever module control unit
Data is exchanged with the following control units over the chassis CAN with the ME-SFI [ME] control unit interface:
- Instrument cluster
- Electronic Stability Program control unit
- Electronic ignition switch control unit
- Steering column module control unit
Further subfunctions are described in separate documents:
^ Power flow, function
^ Power flow in 1st gear, function
^ Power flow in 2nd gear, function
^ Power flow in 3rd gear, function
^ Power flow in 4th gear, function
^ Power flow in 5th gear, function
^ Power flow in 6th gear, function
^ Power flow in 7th gear, function
^ Power flow in reverse gear, transmission mode "S", unction
^ Power flow in reverse gear, transmission mode "C", function
^ Oil supply for automatic transmission, function
^ Transmission oil cooling, function
^ Transmission control, function
^ Limp-home mode, function
^ Shift lock function
^ Shift operation, function
^ Engage gear range, function
^ Wet clutch, function
^ Wet clutch control pressure, function
^ Working/lubrication/shift pressure, function
^ Control valve pressure, function
