VGS [fully integrated transmission control], task - GF27.19-P-4013-02NT

Transmission 722.9 in model 211, except code (428) Steering wheel shift buttons

Model 463.303/340/341

Input and output signals

Fig 1: Fully Integrated Transmission Control Input And Output Signals Chart

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 2: Fully Integrated Transmission Control Function Chart

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Shown up to 31.5.04 with M 113, with 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 input signals from the:

Selection range sensor (VGS) (Y3/8s1)
Transmission oil temperature sensor (VGS) (Y3/8s2), 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)

In addition via the Controller Area Network bus class C (engine compartment) (CAN-C) there is a connection to the:

Instrument cluster (A1)
CDI control unit (N3/9), with OM 642, OM 629
CDI control unit (N3/10), except OM 642, OM 629
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 controller unit (A89) as of 1.6.04, with code (219) Distronic (DTR)
EIS [EZS] control unit (N73)
Central gateway control unit (N93)

The fully integrated transmission control (VGS) control unit (Y3/8n4) actuates the following control solenoid valves depending on the processed input signals:

Working pressure control solenoid valve (VGS) (Y3/8y1), for load-dependent and gear-specific operating 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 (N3/9), with OM 642, OM 629

Start-off in 1st gear, aids engine warm-up
Shift line displacement, 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
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) (Y3/8s2)
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
Pedal value
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 control unit (N3/10), except OM 642, OM 629

Shift curve offset for heating up the catalytic converter
Starting off in 1st gear to heat up the catalytic converter
Active downshift for heating up the catalytic converter (TWC)
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) (Y3/8s2)
Requirement torque for Electronic Stability Program (Electronic-Stability-Program) (ESP), torque reduction or torque increase taking into account directional stability and road adhesion
Engine oil temperature, shift limitation is canceled
Kickdown
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 (S16/5)

ESP, SPS [PML] and BAS control unit (N47-5)

Signal from stop lamp switch (S9/1), 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) up to 31.5.04 or DTR controller unit (A89) as of 1.6.04, with code (219) Distronic (DTR)

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 (A9) ON
Circuit 50, influencing fault memory
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 passed 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)