GF27.19-P-4013-02NTL VGS (Fully Integrated Transmission Control), Task

GF27.19-P-4013-02NTL VGS [fully integrated transmission control], task
- TRANSMISSION 722.9
- with CODE (428) Steering wheel shift buttons

Component Identification:

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 (Electronics) (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 (Electronics) (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/)
^ 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 (All)
^ 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