GF27.60-P-5165AHM Fully Integrated Transmission Control Unit, Component Description

GF27.60-P-5165AHM Fully integrated transmission control unit, component description
- TRANSMISSION 722.904/906/999
- refinement package
- as of model year 09

Component Identification:

Location
The fully integrated transmission control unit (VGS) is integrated in the electric controller unit (VGS), which is located at the bottom in the transmission.

Task

General
The fully integrated transmission control (VGS) control unit determines the instantaneous operating condition of the vehicle and actuates all gear change sequences taking ease of shifting and driving situation into consideration.

Flash programming
The transmission control system in the fully integrated transmission control unit (VGS) is flash programmable i.e. the complete software in the control unit can be replaced (installed new). The software required to program the control units is stored on the STAR DIAGNOSIS DAS Update DVD.

CAN data bus
The fully integrated transmission control unit (VGS) is connected to the CAN system of the vehicle via the engine compartment CAN (CAN-C) and exchanges data with other control units.

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
- Tml. 31
- Circuit 87
- 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
Electronic selector lever module control unit (N15/5)
- Selector lever position
- Transmission mode selection

EIS control unit (N73)
- Drive authorization system release (FBS 3)
- Shift-Lock function request
- Circuit 50 signal, influencing fault storage

ESP, SPS [PML] and BAS control unit (N47-5)
- Wheel speeds and direction of rotation, substitute values in the event of failure of the output speed sensor (VGS)
- 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
- ESP request shift to "N", interruption of power flow
- Stop lamp switch (S9/1), change of shift strategy, brake the vehicle, transmission shifts down earlier
- ESP specified torque, torque reduction or torque increase

Steering column tube module (N80)
- Signal from steering wheel gear shifter MINUS (S110/1)
- Signal from steering wheel gear shifter PLUS (S111/1)

Central gateway control unit (N93)
- Diagnosis request

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

CAN output signals
Instrument cluster (A1)
- Transmission mode selection for left multifunction display (A1p13) and right multifunction display (A1p15)
- Selector lever position for right multifunction display (A1p15)
- Actuation of engine diagnosis indicator lamp (A1e58) except code 494 USA version or CHECK ENGINE engine indicator lamp (A1e26) with code 494 USA version

ESP, SPS [PML] and BAS control unit (N47-5)
- 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"
- Target engine speed for engine idle (for actuation of start-off clutch)
- Status of start-off clutch
- Emergency transmission control

Central gateway control unit (N93)
- Diagnostic data