Fully Integrated Transmission Control Unit Component Description - GF27.60-P-5165ANQ
Transmission 725.066/096 in model 217, 222
View of fully integrated transmission control controller unit (Y3/8) from above
Location
The fully integrated transmission control unit is integrated in the fully integrated transmission control controller unit which is located in the bottom of the automatic transmission.
Tasks
General
The fully integrated transmission control unit determines the current operating condition of the vehicle and actuates all gear change sequences taking shifting comfort and the driving situation into consideration.
Control module programming
The transmission control system in the fully integrated transmission control unit is programmable, i.e. the complete software in the control unit can be exchanged (replaced). The software required for control unit programming is stored on the diagnosis software DVD.
CAN network
The fully integrated transmission control unit is connected via the drive train CAN (CAN C1) to the vehicle's CAN network and exchanges data with other control units.
Input and output signals
The following input signals are evaluated by the fully integrated transmission control unit and the appropriate output signals are generated:
- Direct input/output signals
- CAN input/output signals
Direct input/output signals
Input factors and initial parameters for the following components are read in or sent out over direct lines from the fully integrated transmission control unit:
| Input factors over a direct line | Initial parameters over a direct line | Supplemental information |
|---|---|---|
| Circuit 30 | - | - |
| Emergency-P from electronic ignition lock control unit (N73) | - | - |
| Pressure sensor (Y3/8b5) | - | - |
| Turbine wheel rpm sensor (Y3/8n1) | - | - |
| Internal transmission rpm sensor (Y3/8n2) | - | - |
| Output shaft rpm sensor (Y3/8n3) | - | - |
| Transmission oil temperature sensor (Y3/8s2) | - | Integrated into fully integrated transmission control unit (Y3/8n4). |
| Park pawl position sensor (Y3/8s4) | - | - |
| - | Electric auxiliary oil pump (M42) | - |
| - | Park pawl lift solenoid (Y3/8l1) | - |
| - | Lubrication pressure solenoid (Y3/8y12) | - |
| - | K81 clutch control solenoid (Y3/8y13) | - |
| - | K38 clutch control solenoid (Y3/8y14) | - |
| - | K27 clutch control solenoid (Y3/8y15) | - |
| - | B08 multidisk brake control solenoid (Y3/8y16) | - |
| - | B05 multidisk brake control solenoid (Y3/8y17) | - |
| - | B06 multidisk brake control solenoid (Y3/8y18) | - |
| - | Working pressure solenoid (Y3/8y19) | - |
| - | Wet clutch solenoid (Y3/8y22) | - |
CAN input/output signals
Input and output parameters for the following control units are sent or received by the fully integrated transmission control unit over the CAN:
| Input factors via drive train CAN (CAN C1) | Initial parameters via drive train CAN (CAN C1) | Supplemental information |
|---|---|---|
| Instrument cluster (A1) | Instrument cluster (A1) | Via user interface CAN (CAN HMI), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
| ME-SFI control unit (N3/10) | ME-SFI control unit (N3/10) | - |
| Electronic Stability Program control unit (N30/4) | Electronic Stability Program control unit (N30/4) | Via the chassis FlexRay (Flex E) and powertrain control unit (N127) |
| Left front door control unit (N69/1) | - | Via interior CAN (CAN B), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Audio/COMAND control panel (A40/9) (with code 448 (Touchpad)) | - | Via telematics CAN (CAN A), head unit (A26/17), user interface CAN (CAN HMI), electronic ignition lock control unit (N73), suspension FlexRay (Flex E), Electronic Stability Program control unit (N30/4) and powertrain control unit (N127) |
| Lower control panel (N72) (with code 446 (Touchpad only)) | - | Via LCP LIN (LIN A3), touchpad (A105), telematics CAN (CAN A), head unit (A26/17), user interface CAN (CAN HMI), electronic ignition lock control unit (N73), suspension FlexRay (Flex E), Electronic Stability Program control unit (N30/4) and powertrain control unit (N127) |
| Electronic ignition lock control unit (N73) | Electronic ignition lock control unit (N73) | Via the chassis FlexRay (Flex E) and powertrain control unit (N127) |
| Steering column tube module control unit (N80) | - | Via the chassis FlexRay (Flex E) and powertrain control unit (N127) |
| Powertrain control unit (N127) | Powertrain control unit (N127) | - |
| Wiring diagram for fully integrated transmission control unit | PE27.19-P-2103-97SEE |