Fully integrated transmission control unit, component description - GF27.60-P-5165LEH

TRANSMISSION 722.950 in MODEL 221.095 

TRANSMISSION 722.950 in MODEL 221.195 

Top view of electric controller unit (VGS) (Y3/8) 

Location 

The fully integrated transmission control unit (VGS) is integrated in the electric controller unit (VGS) which is located at the bottom of the transmission in the oil pan.

Task 

General 

With its own independent diagnosis system the fully integrated transmission control unit (VGS) determines the current operating condition of the vehicle and controls all the gear change sequences taking into account shift comfort and the driving situation.

Diagnosis 

For diagnostic purposes, the Diagnosis Assistance System (DAS) can be used to read out and delete the transmission control fault codes, and to actuate certain specific diagnostic functions.

CAN system 

The fully integrated transmission control unit (VGS) is connected to the CAN network of the vehicle via the drive train CAN (CAN-C) and exchanges data with other control units.

Flash programming 

The transmission control in the fully integrated transmission control unit (VGS) is flashable, i.e. the complete software in the control unit can be changed (replaced) using the Diagnosis Assistance System. The software required for control unit programming can be found on the Star Diagnosis DAS Update DVD.

Input and output signals 

The following input signals are evaluated by the fully integrated transmission control unit (VGS) and the appropriate output signals are generated:

• Direct input signals 
• Direct output signals 
• CAN input signals 
• CAN output signals 

Direct input signals 

• Terminal 31
• Circuit 87 (connected circuit 15) ON
• Turbine speed sensor (VGS) (Y3/8n1)
• Internal speed sensor (VGS) (Y3/8n2)
• Output speed sensor (VGS) (Y3/8n3)
• Selection range sensor (VGS) (Y3/8s1)
• Transmission oil temperature sensor (VGS) (Y3/8s2) (integrated in fully integrated transmission control unit (VGS))

Direct output signals 

• Working pressure control solenoid valve (VGS) (Y3/8y1)
• K1 clutch control solenoid valve (VGS) (Y3/8y2)
• K2 clutch control solenoid valve (VGS) (Y3/8y3)
• K3 clutch control solenoid valve (VGS) (Y3/8y4)
• B1 brake control solenoid valve (VGS) (Y3/8y5)
• B2 brake control solenoid valve (VGS) (Y3/8y6)
• B3 brake control solenoid valve (VGS) (Y3/8y7)
• Torque converter lockup clutch control solenoid valve (VGS) (Y3/8y8)

CAN input signals 

Intelligent servo module for DIRECT SELECT (A80) 

• Selector lever position

EIS [EZS] control unit (N73) 

• Drive authorization system enable
• "Key-P function" request
• Circuit 50 signal, influencing fault storage

Regenerative braking system control unit (N30/6) 

• Wheel speeds and direction of rotation, substitute values in event of failure of the output speed sensor (fully integrated transmission control)
• Adjusted braking torque, change of shift strategy, brake the vehicle, transmission shifts down earlier
• Vehicle lateral acceleration at center of gravity, adaptation of shift strategy, detection of dynamic driving style
• Cruise control operation, special shifting strategy
• Electronic Stability Program (ESP) desired shift into "N", power flow interruption
• Hybrid stop lamp switch (S9/3), change of shift strategy, brake the vehicle, transmission shifts down earlier
• ESP specified torque, torque reduction or torque increase

Transmission oil auxiliary pump control unit N89 

• Diagnostic data

Steering column tube module (N80) 

• Steering wheel gear shifter MINUS (S110/1) signal
• Steering wheel gear shifter PLUS (S111/1) signal

ME-SFI [ME] control unit (N3/10) 

• Requests for catalytic converter heating
• Switching request
• Engine torque
• Engine coolant temperature
• Engine speed
• Engine load
• Kickdown
• Engine speed limitation active
• Limp-home mode engine control

Front central operating unit (/)A40/9 

• Transmission mode selection

Central gateway control unit (N93) 

• Diagnosis request

CAN output signals 

Instrument cluster (A1) 

• Selector lever position for gear display (A1p12)
• Multifunction display (A1p13)
• Mode selection for transmission mode display (A1p16)
• Actuation of indicator lamp for engine diagnosis (A1e58)

Regenerative braking system control unit (N30/6) 

• Wheel torque factor, overall gear ratio
• Actual gear, target gear
• Transmission variant, recognition of basic variants, difference in gear ratios

ME-SFI [ME] control unit (N3/10) 

• Drive position
• Transmission mode
• Actual gear, target gear
• Engine torque reduction request
• Starter enable in selector lever position "P", "N"
• Engine idle specified speed (for actuation of the torque converter lockup clutch)
• Status of torque converter lockup clutch
• Emergency transmission control

Central gateway control unit (N93) 

• Diagnostic data

Transmission oil auxiliary pump control unitN89 

• Electric transmission oil pump, request

	Wiring diagram for intelligent servo module (ISM) control unit	A80	PE27.60-P-2101-97SAA
	Wiring diagram for fully integrated transmission control unit	Y3/8	PE27.19-P-2103-97SAA