| GF27.19-P-4016SX | VGS control unit component description | 7.12.04 |
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| 11 Plug connector
31 Float 1 32 Float 2 Y3/8 Electric control unit (VGS) Y3/8n1 Turbine speed sensor (VGS) Y3/8n2 Internal speed sensor (VGS) Y3/8n3 Output speed sensor (VGS) Y3/8n4 Fully integrated transmission control (VGS) control unit Y3/8s1 Selection range sensor (VGS) Y3/8y1 Working pressure control solenoid valve (VGS) Y3/8y2 K1 clutch control solenoid valve (VGS) Y3/8y3 K2 clutch control solenoid valve (VGS) |
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| P27.19-2198-76 |
| Y3/8y4 K3 clutch control solenoid valve (VGS)
Y3/8y5 B1 brake control solenoid valve (VGS) Y3/8y6 B2 brake control solenoid valve (VGS) |
Y3/8y7 B3 brake control solenoid valve (VGS)
Y3/8y8 Torque converter lockup clutch control solenoid valve (VGS) |
| Location
The fully integrated transmission control (VGS) control unit is integrated into the electric control unit (VGS). |
| Input and output signals
11 Plug socket X11/4 Data link connector Y3/8n1 Turbine speed sensor (VGS) Y3/8n2 Internal speed sensor (VGS) Y3/8n3 Output speed sensor (VGS) Y3/8n4 Fully integrated transmission control (VGS) control unit Y3/8s1 Selection range sensor (VGS) Y3/8y1 Working pressure control solenoid valve (VGS) Y3/8y2 K1 clutch control solenoid valve (VGS) Y3/8y3 K2 clutch control solenoid valve (VGS) |
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| P27.19-2211-76 |
| Y3/8y4 K3 clutch control solenoid valve (VGS)
Y3/8y5 B1 brake control solenoid valve (VGS) Y3/8y6 B2 brake control solenoid valve (VGS) |
Y3/8y7 B3 brake control solenoid valve (VGS)
Y3/8y8 Torque converter lockup clutch control solenoid valve (VGS) |
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| P27.19-2296-09 |
| Networking of components, shown on model 221 except code (494) USA version, except code (219) Distronic (DTR)
A Telematics CAN C Drive train CAN D Diagnostic CAN E Chassis CAN F Central CAN LIN E1 Steering LIN |
A1 Instrument cluster A40/3 COMAND control unit A40/9 Front central operating unit A80 Intelligent servo module for DIRECT SELECT N3/10 ME-SFI [ME] control unit N47-5 ESP control unit N73 EIS [EZS] control unit |
N80 Steering column module N93 Central gateway control unit S16/5 Transmission mode switch S16/13 Gear selector switch DIRECT SELECT S110/2 Left steering wheel gear shifter S111/2 Right steering wheel gear shifter Y3/8n4 Fully integrated transmission control (VGS) control unit X11/4 Data link connector |
| Task
The fully integrated transmission control (VGS) control unit determines the instantaneous operating condition of the vehicle and actuates all gear change sequences taking ease of shifting and driving situation into consideration. It receives operating data as internal transmission input signals from the:  Selection range sensor (VGS)
Transmission oil temperature sensor (VGS) (Y3/8s2), which is integrated into the fully integrated transmission control (VGS) control unit
Turbine speed sensor (VGS)
Internal speed sensor (VGS)
Output speed sensor (VGS)
The Controller Area Network (data bus /CAN bus) (CAN) also provides a connection to: Instrument cluster, via the central CAN
Front central operating unit, via the telematics CAN
Intelligent servo module for DIRECT SELECT, via the engine CAN
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ME control unit, via the drive train CAN
DTR control unit, on vehicles with code (219) Distronic (DTR), via the vehicle dynamics CAN
ESP control unit, via the chassis CAN
EIS [EZS] control unit, via the chassis CAN
Steering column module, via the chassis CAN
Central gateway control unit, via the chassis CAN
 The ME control unit is the interface between the drive train CAN and the chassis CAN, the central gateway control unit is, among other things, the interface between the chassis CAN and the central CAN, the COMAND operating, display and control unit is the interface to the telematics CAN and the ESP control unit is the interface to the vehicle dynamics CAN.
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| The fully integrated transmission control (VGS) control unit actuates the following control solenoid valves depending on the processed input signals:
K1 clutch control solenoid valve (VGS)
K2 clutch control solenoid valve (VGS)
Working pressure control solenoid valve (VGS), for load-dependent and gear-specific operating-pressure control
K3 clutch control solenoid valve (VGS)
B1 brake control solenoid valve (VGS)
Brake control solenoid valve B2 (VGS), which also actuates the BR multi-disk brake for reverse gear
B3 brake control solenoid valve (VGS)
Torque converter lockup clutch control solenoid valve (VGS)
This involves the processing of the following data from other systems: Front central operating unit Transmission mode selection on transmission mode switch
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Intelligent servo module for DIRECT SELECT
Actual position of range selector lever
DTR control unit, on vehicles with code (219) Distronic DTR Shift line displacement, brake the vehicle, the fully integrated transmission control (VGS) shifts down earlier
Active downshift, brake the vehicle, the fully integrated transmission control (VGS) shifts down earlier
ESP control unit Signal from BAS release switch (A7/7s1), change of shift strategy, brake the vehicle, the fully integrated transmission control (VGS) shifts down earlier
Set brake torque, change of shift strategy, brake the vehicle, the fully integrated transmission control (VGS) shifts down earlier
ESP request shift into "N" (neutral), power flow interruption, transmission/rear axle
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| Cruise control controls, a special shifting strategy for cruise control mode is filed in the fully integrated transmission control (VGS) control unit
Vehicle lateral acceleration at center of gravity, adaptation of shift strategy, detection of dynamic driving style
Wheel speeds and direction of rotation, substitute values in event of malfunction of output speed sensor (VGS)
ME-SFI control unit Active downshift for heating up the catalytic converter (KAT)
Specified gear, and lower/upper limit for heating up the catalytic converter
Emergency operation of the ME fuel injection and ignition system (motor electronics) (ME), the pedal value is limited to approx. 20 %, the driveability of the vehicle is assured
Engine coolant temperature, used as substitute value in event of malfunction in transmission oil temperature sensor (VGS)
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Shift line displacement for heating up the catalytic converter
Start-up in 1st gear for warming up catalytic converter
Engine oil temperature, shift limitation is canceled
Requirement torque for Electronic Stability Program (Electronic-Stability-Program) (ESP), torque reduction or torque increase taking into account directional stability and road adhesion
Request for torque converter lockup clutch "Open" in the heating up phase of the catalytic converter, to increase engine speed
Engine idle specified speed for the actuation of the torque converter lockup clutch
Engine-speed limitation function active, adaptations are deactivated in the fully integrated transmission control (VGS) control unit
Engine speed, for slip calculation of torque converter lockup clutch and for start of pressure calculation by fully integrated transmission control (VGS) control unit
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| Kickdown
Pedal value
Engine torque
EIS [EZS] control unit Enable the drive authorization system, stage 3 (FBS 3)
Key-P function request
Circuit 50, influencing fault memory
Steering column module Signal from left steering wheel gear shifter
Signal from right steering wheel gear shifter
Signal from DIRECT SELECT gear selector switch
Central gateway control unit Diagnosis
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The following information is output to other systems:
Instrument cluster Gear selector switch position and selected shifting range for gear indicator (A1p12)
Transmission mode selection for the transmission mode display (A1p16)
Intelligent servo module for DIRECT SELECT Driver selected gear selector position
Specified position of range selector lever
DTR control unit, on vehicles with code (219) Distronic DTR Transmission variant, recognition of basic variants, difference in gear ratios
Actual gear engaged/target gear, i.e. engaged gear, gear to be shifted, can be shown via STAR DIAGNOSIS
Wheel torque factor, overall gear ratio
ESP control unit Wheel torque factor, overall gear ratio
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| Actual gear engaged/target gear, i.e. engaged gear, gear to be shifted, can be shown via STAR DIAGNOSIS
Transmission variant, recognition of basic variants, difference in gear ratios
ME-SFI control unit Engine torque requests, engine intervention when shifting
Limp-home of fully integrated transmission control (VGS)
Starter enable in gear selector switch position "P", "N"
Transmission variant, recognition of basic variants, difference in gear ratios
Actual gear engaged/target gear, i.e. engaged gear, gear to be shifted, can be shown via STAR DIAGNOSIS
Status of torque converter lockup clutch |
Central gateway control unit
Diagnosis |