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

GF27.19-P-4013-02NR VGS [fully integrated transmission control], task
- TRANSMISSION 722.9
- except CODE (428) Steering wheel shift buttons
- up to model year 08

Component Identification:

Task
The fully integrated transmission control (VGS) control unit (Y3/8n4) determines the instantaneous operating condition of the vehicle and controls all the gear change sequences taking into account the ease of shifting and driving situation.

It receives operating data as internal transmission input signals from the:
^ Selection range sensor (VGS) (Y3/8s1)
^ Transmission oil temperature sensor (VGS) (Y3/8s2), which is integrated in 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)

In addition via the Controller Area Network bus Class C (engine compartment) (CAN-C) there is a connection to the:
^ Instrument cluster (A1)
^ ME-SFI [ME] control unit (N3/10)
^ Electronic selector lever module control unit (N15/5)
^ ESP, SPS [PML] and BAS control unit (N47-5)
^ DTR control unit (N63/1) up to 31.5.04 or DTR control unit (A89) as of 1.6.04
^ EIS [EZS] control unit (N73)
^ Central gateway control unit (N93)

The fully integrated transmission control (VGS) control unit (Y3/8n4) assumes control of the following control solenoid valves depending on the processed input signals:
^ Working pressure control solenoid valve (VGS) (Y3/8y1), for load-dependent and gear-dependent operating pressure regulation
^ Control solenoid valve coupling K1 (VGS) (Y3/8y2)
^ Control solenoid valve coupling K2 (VGS) (Y3/8y3)
^ Control solenoid valve coupling K3 (VGS) (Y3/8y4)
^ Brake control solenoid valve B1 (VGS) (Y3/8y5)
^ Brake control solenoid valve B2 (VGS) (Y3/8y6), which also actuates the multi-disk brake, brake pressure regulation 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:

ME-SFI [ME] control unit (N3/10)
^ Active downshift for heating up the catalytic converter (KAT)
^ Driving off 1st gear, for heating of 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 governs, a specific shifting strategy for cruise control mode is filed in the fully integrated transmission control (VGS) control unit (Y3/8n4)
^ Engine coolant temperature, used as a substitute value if the transmission oil temperature sensor (VGS) (Y3/8s2) malfunctions
^ Engine oil temperature, shift limitation is canceled
^ Kickdown
^ Pedal value
^ 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, for slip calculation of torque converter lockup clutch and for start of pressure calculation by the fully integrated transmission control (VGS) control unit (Y3/8n4)
^ Speed limiter function active, adaptations in the fully integrated transmission control (VGS) control unit (Y3/8n4) switched off
^ Engine torque

Electronic selector lever module control unit (N15/5)
^ Selector lever position
^ Transmission mode switch (S16/5)

ESP, SPS [PML] and BAS control unit (N47-5)
^ Signal of stop lamp switch (S9/1s1), change of shift strategy, brake the vehicle, the fully integrated transmission control (VGS) shifts down sooner
^ 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 output speed sensor (VGS) (Y3/8n3) malfunction
^ 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) up to 31.5.04 or DTR control unit as of 1.6.04
^ 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 [EZS] control unit (N73)
^ Refrigerant compressor (A9) ON
^ Circuit 50, influencing fault storage
^ Torque requirement of refrigerant compressor (A9), torque correction

Central gateway control unit (N93)
^ Refrigerant compressor (A9) ON
^ Circuit 50
^ Torque requirement of refrigerant compressor (A9), torque correction

The following information is output to other systems:

Instrument cluster (A1)
^ Selector lever position for gear indicator (A1p12)
^ Program selection on transmission mode switch (S16/5), for transmission mode display (A1p16)

ME-SFI [ME] control unit (N3/10)
^ Engine torque requests, engine intervention when shifting
^ Emergency-running mode for fully integrated transmission control
^ 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
^ Torque converter lockup clutch status

ESP, SPS [PML] and BAS 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) up to 31.5.04 or DTR control unit (A89) as of 1.6.04
^ 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 [EZS] control unit (N73)
^ Selector lever position for the actuation of the backup lamp function

Central gateway control unit (N93)
^ Selector lever position for the actuation of the backup lamp function
^ Diagnosis