VGS [fully integrated transmission control], task - GF27.19-P-4013-02NTL
Shown on vehicle up to 31.5.04 with engine 112 and code (219) Distronic (DTR)
Task
The fully integrated transmission control (VGS) control unit (Y3/8n4) 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 transmission-internal signals from the:
- Selection range sensor (VGS) (Y3/8s1)
- Transmission oil temperature sensor (VGS), which is integrated into the fully integrated transmission control (VGS) control unit (Y3/8n4)
- Turbine speed sensor (VGS) (Y3/8n1)
- Internal speed sensor (VGS) (Y3/8n2)
- Output speed sensor (VGS) (Y3/8n3)
Data exchange with the following control units takes place via CAN-C (CAN-C):
- Instrument cluster (A1)
- CDI control unit (with diesel engine)
- ME-SFI [ME] control unit (N3/10) (with gasoline engine)
- Electronic selector lever module control unit (N15/5)
- ESP control unit (N47-5)
- With code (219) Distronic (DTR) DTR control unit (N63/1) (up to 31.5.04) or DTR controller unit (as of 1.6.04)
- EIS [EZS] control unit (N73)
- Steering column module (N80)
- Central gateway control unit (N93)
The fully integrated transmission control (VGS) control unit (Y3/8n4) actuates the following components:
- Working pressure control solenoid valve (VGS) (Y3/8y1), for load-dependent and gear-specific working pressure control
- Clutch control solenoid valve K1 (VGS) (Y3/8y2)
- Clutch control solenoid valve K2 (VGS) (Y3/8y3)
- Clutch control solenoid valve K3 (VGS) (Y3/8y4)
- Brake control solenoid valve B1 (VGS) (Y3/8y5)
- Brake control solenoid valve B2 (VGS) (Y3/8y6), which also actuates the BR multi-disk brake for reverse gear
- Brake control solenoid valve B3 (VGS) (Y3/8y7)
- Torque converter lockup clutch control solenoid valve (VGS) (Y3/8y8)
This involves the processing of the following data from other systems:
CDI control unit
- Shift line displacement, aids engine warm-up
- Shift line displacement dependent on load condition of diesel particulate filter (DPF) (with code (474) particulate filter), a heavily loaded DPF results in slightly lower upshift speed for full-load and kick-down upshifts
- Specified gear, lower/upper limit, aids engine warm-up
- Engine coolant temperature, used as substitute value in event of malfunction in transmission oil temperature sensor (VGS)
- Engine oil temperature, shift limitation is canceled
- Start-off in 1st gear, aids engine warm-up
- Emergency operation of the common rail diesel injection (CDI), 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
- Pedal value
- Kickdown
- Request for torque converter lockup clutch "OPEN" during heating up phase of engine, increase in engine speed
- Engine speed, for slip calculation of torque converter lockup clutch and for start of pressure calculation by fully integrated transmission control (VGS) control unit (Y3/8n4)
- Engine-speed limitation function active, adaptations are deactivated in the fully integrated transmission control (VGS) control unit (Y3/8n4)
- Engine torque
ME-SFI [ME] control unit (N3/10)
- Active downshift for heating up the catalytic converter (KAT)
- Starting off in 1st gear to heat up the catalytic converter
- Shift line displacement 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
- Cruise control controls, a special shifting strategy for cruise control mode is filed in the fully integrated transmission control (VGS) control unit (Y3/8n4)
- Engine coolant temperature, used as substitute value in event of malfunction in transmission oil temperature sensor (VGS)
- Requirement torque for Electronic Stability Program (Electronic-Stability-Program) (ESP), torque reduction or torque increase taking into account directional stability and road adhesion
- Kickdown
- Engine oil temperature, shift limitation is canceled
- Pedal value
- 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, for slip calculation of torque converter lockup clutch and for start of pressure calculation by fully integrated transmission control (VGS) control unit (Y3/8n4)
- Engine-speed limitation function active, adaptations are deactivated in the fully integrated transmission control (VGS) control unit (Y3/8n4)
- Engine torque
Electronic selector lever module control unit (N15/5)
- Selector lever position
- Transmission mode switch
ESP control unit (N47-5)
- Signal from stop lamp switch, change of shift strategy, brake the vehicle, the fully integrated transmission control (VGS) shifts down earlier
- Adjusted brake torque, change of shift strategy, brake the vehicle, the fully integrated transmission control shifts down earlier
- Wheel speeds and direction of rotation, substitute values in event of malfunction of output speed sensor (VGS) (Y3/8n3)
- 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
DTR control unit (N63/1) or DTR controller unit
- Shift line displacement, brake the vehicle, the fully integrated transmission control shifts down earlier
- Active downshift, brake the vehicle, the fully integrated transmission control shifts down earlier.
EIS control unit (N73)
- Refrigerant compressor ON
- Circuit 50, influencing fault memory
- Torque requirement of refrigerant compressor, torque correction
Steering column module (N80)
- Status of left steering wheel gear shifter and right steering wheel gear shifter (up to 31.5.06)
- Status of steering wheel gear shifter MINUS and steering wheel gear shifter PLUS (as of 1.6.06)
Central gateway control unit (N93)
- Refrigerant compressor ON
- Circuit 50
- Torque requirement of refrigerant compressor, torque correction
The following information is transmitted to other systems:
Instrument cluster (A1)
- Selector lever position for gear indicator
- Mode selection on transmission mode switch for transmission mode display
CDI control unit or ME-SFI [ME] control unit (N3/10)
- Engine torque requests, engine intervention when shifting
- Starting release in selector lever 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
- Emergency-running mode for fully integrated transmission control
ESP control unit (N47-5)
- Wheel torque factor, overall gear ratio
- 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
DTR control unit (N63/1) or DTR controller unit
- 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
EIS control unit (N73)
- Selector lever position for backup lamp actuation
Central gateway control unit (N93)
- Selector lever position for backup lamp actuation
- Diagnosis request