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

GF27.60-P-5164ACL Electronic transmission-control control unit, component description
- Transmission 722.618/646/694/696

Component Identification:

Location
The electronic transmission control control unit is located in the front of the front passenger footwell.

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.

Controller Area Network (data bus/CAN bus) (CAN)
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)
- "Enable" from drive authorization system stage 3 (DAS 3)
- Shift-Lock-F unction request
- Circuit-50 signal, influencing fault storage

Electronic Stability Program control unit (N30/4) (except code (233) DISTRONIC PLUS) or Electronic Stability Program Premium control unit (N30/7) (with code (233) DISTRONIC PLUS)
- Wheel speeds and direction of rotation, substitute values in the event of failure of rpm sensor 2 and rpm sensor 3
- 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 (Electronic-Stability-Program) (ESP) requirement shifting into "N", power flow interruption
- Stop lamp switch (S9/1), change of shift strategy, brake vehicle, transmission shifts down earlier
- ESP specified torque, torque reduction or torque increase

CDI control unit (N3/9) or ME-SFI [ME] control unit (N3/10)
- Requests for catalytic converter heating
- Requests for heating up diesel particulate filter (DPF), with diesel engines
- Switching request
- Engine torque
- Engine coolant temperature
- Engine speed
- Engine load
- kick down
- Engine speed limitation active
- Limp-home mode engine control

Trailer recognition control unit (N28/1) (for code (550) Trailer hitch)
- Trailer recognition signal

Front SAM control unit with fuse and relay module (N10/1)
- Diagnosis request
- Status of vehicle dynamics button (N72/1s23), on model 207 with code (483) ADVANCED AGILITY-Paket

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 (except code (233) DISTRONIC PLUS) or Electronic Stability Program Premium control unit (with code (233) DISTRONIC PLUS)
- 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
- Diagnosis communication

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

Flash programming
The transmission control in the electronic transmission control control unit is flashable, i.e. the complete software of the electronic transmission control control unit can be exchanged (replaced). The software required for control unit programming is stored on the Star Diagnosis Diagnosis Assistance System (DAS) update DVD.