Fully integrated transmission control unit, component description - GF27.60-P-5165AHW
TRANSMISSION 722.9 (except 722.930) in MODEL 204.0 as of model year 2009 /YoM 08
View of fully integrated transmission controller unit (Y3/8) from above
Location
The fully integrated transmission control unit is integrated into the fully integrated transmission control controller unit located in the automatic 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 control unit for the fully integrated transmission control (VGS) is flashable i.e. the complete software in the control unit can be changed (replaced). The software required for control unit programming is stored on the STAR DIAGNOSIS DAS update DVD (D iagnose-A ssistance S ystem).
CAN data bus
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.
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
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
- Circuit 87 (switched circuit 15)
- 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)
- Torque converter lockup clutch control solenoid valve (Y3/8y8)
CAN input signals
Electronic selector lever module control unit (N15/5)
- Selector lever position
- Transmission mode selection
Electronic ignition lock control unit (N73)
- Drive authorization system (DAS) enable
- "Shift lock function" request
- Circuit 50 signal, influencing 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) desired shift into "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)
- The signal from the Downshift steering wheel gearshift button (S110/1) (with code (428) steering wheel shift paddles)
- Upshift steering wheel gearshift button signal (S111/1) (with code (428) Steering wheel shift paddles)
CDI control unit (N3/9) or ME-SFI 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
Trailer recognition control unit (N28/1) (for code (550) Trailer hitch)
- Trailer recognition signal
Front SAM control unit with fuse and relay module (N10/1)
- Diagnosis request
Transmission oil auxiliary pump control unit (N89) (with code (B03) ECO start/stop function)
- Actual value of duty cycle (applied current actual value)
- Diagnostic data
CAN output signals
Instrument cluster (A1)
- Selector lever position for gear indicator (A1p12)
- Multifunction display (A1p13)
- Mode selection for transmission mode display (A1p16)
- Actuation of engine diagnosis indicator lamp (A1e58)
Electronic Stability Program control unit (N30/4)
- 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
Transmission oil auxiliary pump control unit (N89) (with code (B03) ECO start/stop function)
- Specified value of duty cycle (applied current specification value)
CDI control unit (N3/9) or ME-SFI control unit (N3/10)
- Drive position
- Transmission mode
- Actual gear, target gear
- Engine torque reduction request
- Starter enable in selector lever position "P, N"
- Engine idle specified speed (for actuation of the torque converter lockup clutch)
- Status of torque converter lockup clutch
- Transmission limp-home mode
| Wiring diagram for electronic selector lever module control unit | N15/5 | PE27.19-P-2102-97FAA | |
| Wiring diagram for fully integrated transmission control unit | Y3/8 | PE27.19-P-2103-97FAA |