CLS 55 AMG (219.376) V8-5.5L SC (113.990) (2006)
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:
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Selection range sensor (VGS) (Y3/8s1)
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Transmission oil temperature sensor (VGS), which is integrated into the fully integrated transmission control (VGS) control unit (Y3/8n4)
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Turbine speed sensor (VGS) (Y3/8n1)
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Internal speed sensor (VGS) (Y3/8n2)
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Output speed sensor (VGS) (Y3/8n3)
Data exchange with the following control units takes place via CAN-C (CAN-C):
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Instrument cluster (A1)
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DTR controller unit (A89) (with code (219) Distronic (DTR))
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CDI control unit (with diesel engine)
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ME-SFI [ME] control unit (N3/10) (with gasoline engine)
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Electronic selector lever module control unit (N15/5)
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ESP control unit (N47-5)
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EIS [EZS] control unit (N73)
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Steering column module (N80)
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Central gateway control unit (N93)
The fully integrated transmission control (VGS) control unit (Y3/8n4) actuates the following components:
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Working pressure control solenoid valve (VGS) (Y3/8y1), for load-dependent and gear-specific working pressure control
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Clutch control solenoid valve K1 (VGS) (Y3/8y2)
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Clutch control solenoid valve K2 (VGS) (Y3/8y3)
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Clutch control solenoid valve K3 (VGS) (Y3/8y4)
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Brake control solenoid valve B1 (VGS) (Y3/8y5)
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Brake control solenoid valve B2 (VGS) (Y3/8y6), which also actuates the BR multi-disk brake for reverse gear
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Brake control solenoid valve B3 (VGS) (Y3/8y7)
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Torque converter lockup clutch control solenoid valve (VGS) (Y3/8y8)
This involves the processing of the following data from other systems:
DTR controller unit (A89)
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Shift line displacement, brake the vehicle, the fully integrated transmission control (VGS) shifts down earlier
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Active downshift, brake the vehicle, the fully integrated transmission control shifts down earlier.
CDI control unit
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Start-off in 1st gear, aids engine warm-up
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Shift line displacement, aids engine warm-up
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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
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Specified gear, lower/upper limit, aids engine warm-up
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Kickdown
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Engine coolant temperature, used as substitute value in event of malfunction in transmission oil temperature sensor (VGS)
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Engine oil temperature, shift limitation is canceled
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Emergency operation of the common rail diesel injection (CDI), the pedal value is limited to approx. 20 %, the driveability of the vehicle is
assured
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Requirement torque for Electronic Stability Program (Electronic-Stability-Program) (ESP), torque reduction or torque increase taking into account
directional stability and road adhesion
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Pedal value
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Request for torque converter lockup clutch "OPEN" during heating up phase of engine, increase in engine speed
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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)
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Engine-speed limitation function active, adaptations are deactivated in the fully integrated transmission control (VGS) control unit (Y3/8n4)
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Engine torque
ME-SFI [ME] control unit (N3/10)
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Active downshift for heating up the catalytic converter (KAT)
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Shift line displacement for heating up the catalytic converter
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Specified gear, and lower/upper limit for heating up the catalytic converter
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Emergency operation of the ME-SFI gasoline injection and ignition system (motor electronics) (ME), the pedal value is limited to approx. 20 %,
the driveability of the vehicle is ensured.
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Cruise control controls, a special shifting strategy for cruise control mode is filed in the fully integrated transmission control (VGS) control unit
(Y3/8n4)
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Engine coolant temperature, used as substitute value in event of malfunction in transmission oil temperature sensor (VGS)