GF27.60-P-5164ACW Electronic Transmission-Control Control Unit, Component Description

GF27.60-P-5164ACW Electronic transmission-control control unit, component description
- TRANSMISSION 722.618/640/646/695/699

Component Identification:

Location
The electronic transmission-control control unit is located on the front passenger foot well plate.

Task

General
The electronic transmission-control control unit determines the current operating condition of the vehicle and controls all the gear change sequences, taking into account the shift comfort and driving situation.

Flash programming
The transmission control in the electronic transmission-control control unit is flashable i.e. the complete software in the control unit can be changed (replaced). The software required to program the control units is stored on the STAR DIAGNOSIS DAS Update DVD.

CAN data bus
The electronic transmission-control control unit is connected via the drive train CAN (CAN C) to the vehicle's CAN network, and exchanges data with other control units.

Input and output signals
The following input signals are evaluated by the electronic transmission-control control unit 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
- Starter lock-out contact (Y3/6s1)
- Transmission oil temperature sensor (Y3/6b1)
- Rotational speed of sun gear (rpm sensor 2 (Y3/6n2))
- RPM of the planetary spider (rpm sensor 3 (Y3/6n3))

Direct output signals
- Modulating pressure control solenoid valve (Y3/6y1)
- Shift pressure control solenoid valve (Y3/6y2)
- 1-2 and 4-5 gearshift solenoid valve (Y3/6y3)
- 3-4 gearshift solenoid valve (Y3/6y4)
- 2-3 gearshift solenoid valve (Y3/6y5)
- Torque converter lockup clutch control solenoid valve (Y3/6y6)

CAN input signals
Electronic selector lever module control unit (N15/5)
- Selector lever position
- Transmission mode selection

Electronic ignition lock control unit (N73)
- Drive authorization system release (DAS 3)
- Shift lock function request
- Circuit 50 signal, influencing fault storage

CDI control unit (N3/9) or ME-SFI 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

Trailer recognition control unit (N28/1)
- Trailer recognition signal

Front SAM control unit with fuse and relay module (N10/1)
- Diagnosis request

Electronic Stability Program control unit (N:30/4)
- Wheel speeds and direction of rotation, substitute values when rpm sensors 2 and 3 malfunction
- 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 vehicle, transmission shifts down earlier
- ESP specified torque, torque reduction or torque increase

Steering column module control unit (N80)
- Steering wheel downshift gearshift button signal (5110/1)
(with code (428) Steering wheel shift paddles)
- Steering wheel upshift gearshift button signal (S111/1)
(with code (428) Steering wheel shift paddles)

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)

Electronic Stability Program control unit (N30/4)
- Wheel torque factor, overall gear ratio
- Actual gear, target gear
- Transmission variant, recognition of basic variants, difference in gear ratios

Front SAM control unit with fuse and relay module (N10/1)
- Diagnostic data

CDI control unit (N3/9) or ME-SFI 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