GF27.10-P-0001AHW Automatic Transmission (AT), Function

GF27.10-P-0001AHW Automatic Transmission (AT), Function
TRANSMISSION 722.9 (except 722.930) in MODEL 204.0 as of model year 2009 /YoM 08
TRANSMISSION 722.9 (except 722.930) in MODEL 204.2 as of model year 2009 /YoM 08
TRANSMISSION 722.9 (except 722.930) in MODEL 204.3
TRANSMISSION 722.9 in MODEL 204.9

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.

A minimization of the of the interfaces to the wiring loom is achieved by integrating the fully integrated transmission control controller unit (Y3/8) in transmission 722.9.

With model 204.0/2/3/9 as of 1.7.2010
Service life can be increased, fuel consumption reduced, gearshift comfort improved and maintenance intervals revised by using optimized transmission components, a new automatic transmission fluid, by reducing working pressure and by implementing modified software.

Implementation dates and validities for torque converter with integrated centrifugal pendulum
- Model 204.0/2 as of model year 2012 /YoM 11 model refinement package with engine 276.9, 651.9
- Model 204.025/225 as of 1.6.2011 with engine 642.8
- Model 204.3 with engine 276.9, 651.9
- Model 204.9 as of 1.6.2011 with engine 651.9
- Model 204.988 as of 1.1.2011 with engine 276.9

Implementation dates and validities for code (B03) ECO start/stop function
- Model 204.0/2 as of model year 2012 /YoM 11 model refinement package with engine 271.8, 276.9, 651.9
- Model 204.025/225 as of 1.6.2011 with engine 642.8
- Model 204.3
- Model 204.9 as of 1.6.2011 with engine 651.9
- Model 204.988 as of 1.1.2011 with engine 276.9
- Model 204.0/2/3 as of 1.6.2012 with engine 274.9

Transmission 722.9 can be subdivided into the following assemblies:

- Torque converter with torsional damper and torque converter lockup clutch
- or torque converter with integrated centrifugal pendulum and torque converter lockup clutch (see production breakpoints and validities for torque converter with integrated centrifugal pendulum)
- Oil pump for generating the necessary oil pressure and for reliable lubrication of the actuators and bearing points
- Electrical transmission oil pump (M42) (with code (B03) ECO start/stop function) for generating required oil pressure and for reliable lubrication of the actuators and bearing points at engine OFF
- 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 via the drive train CAN (CAN C):

- Electronic selector lever module control unit (N15/5)
- CDI control unit (N3/9) (with diesel engines)
- ME-SFI [ME] control unit (N3/10) (on gasoline engines)
- Transmission oil auxiliary pump control unit (N89) (with code (B03) ECO start/stop function)

Data is exchanged with the following control units via the chassis CAN (CAN E) with the interface of the CDI or motor electronics control units:
- Instrument cluster (A1)
- Electronic Stability Program control unit (N30/4)
- Front SAM control unit with fuse and relay module (N10/1)
- Electronic ignition lock control unit (N73)
- Steering column tube module control unit (N80)

Further subfunctions are described in separate documents:
^ Transmission control, function
^ Shift lock function
^ Shift operation, function
^ Power transmission, function