Component description for fully integrated transmission control unit, - GF27.60-P-5165AHV
TRANSMISSION 722.930 in MODEL 204.0/2/3
View of fully integrated transmission control controller unit (Y3/8) from left front
Location
The fully integrated transmission control unit is integrated in the fully integrated transmission control controller unit which is located in the oil pan at the bottom of the transmission.
Task
General
With its own independent diagnosis system the fully integrated transmission control unit determines the current operating condition of the vehicle and controls all gear change sequences taking into account shift comfort and the driving situation.
Flash programming
The transmission control system in the fully integrated transmission control unit (VGS) is flash programmable i.e. the complete software in the control unit can be exchanged (replaced). The software required for control unit programming can be found on the STAR DIAGNOSIS update DVD.
Controller Area Network (data bus/CAN bus) (CAN)
The fully integrated transmission control unit is connected via the drive train CAN (CAN C) to the vehicle's CAN network, and exchanges data with other control units.
The ME-SFI [ME] control unit (N3/10) serves as the interface between the drive train CAN and chassis CAN (CAN E).
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 signals
- Direct output signals
- CAN input signals
- CAN output signals
Direct input signals
- Circuit 31
- Terminal 87
- Wet clutch oil pressure sensor (Y3/8b1)
- Turbine wheel rpm sensor (Y3/8n1)
- Internal transmission rpm sensor (Y3/8n2)
- Output shaft rpm sensor (Y3/8n3)
- Selection range sensor (Y3/8s1)
- Transmission oil temperature sensor (Y3/8s2) (integrated into the fully integrated transmission control unit)
Direct output signals
- Working pressure control solenoid valve (Y3/8y1)
- Clutch control solenoid valve K1 (Y3/8y2)
- Clutch control solenoid valve K2 (Y3/8y3)
- Clutch control solenoid valve K3 (Y3/8y4)
- Multidisk brake control solenoid valve B1 (Y3/8y5)
- Multidisk brake control solenoid valve B2 (Y3/8y6)
- Multidisk brake control solenoid valve B3 (Y3/8y7)
- Wet clutch control solenoid valve (Y3/8y9)
CAN input signals
Electronic selector lever module control unit (N15/5)
- Selector lever position
- Transmission mode selection
Electronic ignition lock control unit (N73)
- "Enable" from drive authorization system stage 3 (DAS 3)
- "Shift lock function" request
- Circuit -50 signal, influence on fault storage
Electronic Stability Program control unit (N30/4)
- Wheel speeds and direction of rotation, substitute values in the event of failure of the output shaft rpm sensor
- Adjusted braking torque, change of shift strategy, brake the vehicle, transmission shifts down earlier
- Vehicle lateral acceleration at center of gravity, adaptation of shift strategy, detection of dynamic driving style
- Cruise control operation, special shifting strategy
- Electronic Stability Program (ESP) request for shifting to "N", power flow interruption
- Brake light switch (S9/1), change of shift strategy, brake vehicle, transmission shifts down earlier
- ESP specified torque, torque reduction or torque increase
Steering column tube module control unit (N80)
- Downshift steering wheel gearshift button (S110/1)
- Upshift steering wheel gearshift button (S111/1)
Front SAM control unit with fuse and relay module (N10/1)
- Diagnosis request
ME-SFI [ME] control unit (N3/10)
- Requests for catalytic converter heating
- Shift request
- Engine torque
- Engine coolant temperature
- Engine speed
- Engine load
- Kickdown
- Engine speed limitation active
- Engine control limp-home mode
CAN output signals
Instrument cluster (A1)
- Transmission mode selection for transmission mode display (A1p16)
- Selector lever position and gear indicator (A1p12)
- Actuation of engine diagnosis indicator lamp (A1e58)
Electronic Stability Program control unit
- Wheel torque factor, overall gear ratio
- Actual gear, target gear
- Transmission variant, recognition of basic variants, difference in gear ratios
Front SAM control unit with fuse and relay module (N10/1)
- Diagnostic data
ME-SFI [ME] control unit (N3/10)
- Drive position
- Transmission mode
- Actual gear, target gear
- Engine torque reduction request
- Starter enable in selector lever position "P" or "N"
- Specified engine idle speed (for wet clutch actuation)
- Wet clutch status
- Transmission limp-home mode
| Designation | Unit | Value | Tolerance range | Remarks | |
|---|---|---|---|---|---|
| Control unit for fully integrated transmission control (Y3/8n4) | |||||
| Power supply | V | 13.5 | |||
| Voltage limit: | minimum | V | 9.0 | ||
| maximum | V | 16.0 | |||
| Limited functionality: | minimum | V | 5, 8 - 9, 0 | ||
| maximum | V | 16, 0 - 27, 0 | |||
| Power consumption: | maximum | mA | 500 | Quiescent current | |
| minimum | A | 5 (temporarily 10) | Operation | ||
| Short circuit current consumption: | maximum | A | 13 | With a hydraulic valve | |
| minimum | mA | 700 | at another pin | ||
| Reverse polarity protection | VV | -16 | Yes | ||
| Operating temperature range | °C | -40 - 140 | |||
| Temperature profile | °C | -40 - 100 | 90 % of service life | ||
| °C | 100 - 130 | 9 % of service life | |||
| °C | 130 - 140 | 1 % of service life | |||
| Special features | Fault detection | ||||
| Flash capability/coding capability | Yes/yes | ||||
| Wiring diagram for fully integrated transmission control unit | Y3/8n4 | PE27.19-P-2103-97FAA |