GF27.19-P-4016RT | VGS control unit, component description | 20.7.06 |
TRANSMISSION 722.9 in MODEL 251.0 /1 up to Model Year 8
P27.19-2198-76
11 Plug connector
31 Float 1
32 Float 2
Y3/8 Electric controller 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)
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 controller unit (VGS).
P27.19-2211-76
Input and output signals
11 Connector
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)
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)
P27.19-2299-09
Networking of components, shown on engine 113
A1 Instrument cluster
A80 Intelligent servo module for DIRECT SELECT
N3/10 ME control unit
N80 Steering column module
N93 Central gateway control unit
Y3/8n4 Fully integrated transmission control (VGS) control unit
N47-5 ESP control unit
N72/1 Upper control panel control unit
N72/1s32 Transmission mode switch
N73 EIS [EZS] control unit
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)
In addition via the Controller Area Network bus class C (engine compartment) (CAN-C) there is a connection to the:
Instrument cluster
Intelligent servo module for DIRECT SELECT
CDI control unit (N3/9) (with engine 642)
ME-SFI [ME] control unit (except engine 642)
-----------------------------------------------------------------------------------------
ESP control unit
Upper control panel control unit
EIS [EZS] control unit
Steering column module
Central gateway control unit
The fully integrated transmission control (VGS) control unit actuates the following control solenoid valves depending on the processed input signals:
Working pressure control solenoid valve (VGS), for load-dependent and gear-specific operating-pressure control
K1 clutch control solenoid valve (VGS)
K2 clutch control solenoid valve (VGS)
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:
Intelligent servo module for DIRECT SELECT
Actual position of range selector lever
CDI control unit (with engine 642)
Start-off in 1st gear, aids engine warm-up
Shift line displacement, aids engine warm-up
Specified gear, lower and upper limit, aids engine warm-up
Shift line displacement, dependent on load condition of diesel particulate filter (DPF), a heavily loaded DPF results in slightly lower upshift speed for full-load and kick-down upshifts
Engine coolant temperature, used as substitute value in event of malfunction in transmission oil temperature sensor (VGS)
Engine oil temperature, shift limitation is canceled
-----------------------------------------------------------------------------------------
Emergency operation of the common rail diesel injection, the pedal value is limited to approx. 20 %, the driveability of the vehicle is assured
Requirement torque for Electronic Stability Program (Electronic-Stability-Program) (ESP), torque reduction or torque increase taking into account directional stability and road adhesion
Kickdown
Request "Torque converter lockup clutch OPEN", in the warm-up phase of the engine, increase in 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
-----------------------------------------------------------------------------------------
Pedal value
Engine torque
ME-SFI [ME] control unit (except engine 642)
Active downshift for heating up the catalytic converter (TWC)
Shift curve offset for heating up the catalytic converter
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)
Engine-speed limitation function active, adaptations are deactivated in the fully integrated transmission control (VGS) control unit
-----------------------------------------------------------------------------------------
Starting off in 1st gear to heat up the catalytic converter
Engine oil temperature, shift limitation is canceled
Selected torque ESP, torque reduction or increase taking directional stability and road adhesion into account
Kickdown
Pedal value
Request "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, for slip calculation of torque converter lockup clutch and for start of pressure calculation by fully integrated transmission control (VGS) control unit
Engine torque
-----------------------------------------------------------------------------------------
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
Wheel speeds and direction of rotation, substitute values in event of malfunction of output speed sensor (VGS)
ESP request shift into "N" (neutral), power flow interruption, transmission/rear axle
Vehicle lateral acceleration at center of gravity, adaptation of shift strategy, detection of dynamic driving style
Cruise control controls, a special shifting strategy for cruise control mode is filed in the fully integrated transmission control (VGS) control unit
-----------------------------------------------------------------------------------------
Upper control panel control unit
Transmission mode switch
EIS [EZS] control unit
Refrigerant compressor (A9) ON
Circuit 50, influencing fault memory
Torque requirement of refrigerant compressor, torque correction
Steering column module
Signal from steering wheel gear shifter MINUS (S110/1), on model 251.077/177
Signal from steering wheel gear shifter PLUS (S111/1), on model 251.077/177
Signal from left steering wheel gear shifter (S110/2), except model 251.077/177
Signal from right steering wheel gear shifter (S111/2), except model 251.077/177
Signal from DIRECT SELECT gear selector switch (S16/13)
-----------------------------------------------------------------------------------------
Central gateway control unit
Diagnosis
The following information is passed to other systems:
Instrument cluster
Gear selector switch position and selected shift range for multifunction display (A1p13)
Transmission mode selection for multifunction display
Intelligent servo module for DIRECT SELECT
Specified position of range selector lever
CDI control unit (with engine 642)
Engine torque requests, engine intervention when shifting
Limp-home of fully integrated transmission control (VGS)
Starter lockout release in selector lever position "P", "N"
Transmission variant, recognition of basic variants, difference in gear ratios
Status of torque converter lockup clutch
-----------------------------------------------------------------------------------------
Actual gear and target gear, gear engaged, gear to be shifted, can be shown using STAR DIAGNOSIS
ME-SFI [ME] control unit (except engine 642)
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 and target gear, gear engaged, gear to be shifted, can be shown using STAR DIAGNOSIS
Status of torque converter lockup clutch
ESP control unit
Wheel torque factor, overall gear ratio
Transmission variant, recognition of basic variants, difference in gear ratios
Actual gear, target gear, gear engaged, gear to be shifted, can be shown using STAR DIAGNOSIS
-----------------------------------------------------------------------------------------
EIS [EZS] control unit
Selector lever position for the actuation of the backup lamp function
Central gateway control unit
Selector lever position for the actuation of the backup lamp function
Diagnosis