Component Description For Fully Integrated Transmission Control Unit - GF27.60-P-5165ANF
Transmission 725.0 in model 166
View of fully integrated Transmission control controller unit (Y3/8) from above
Location
The fully integrated Transmission control unit is integrated in the fully integrated Transmission control controller unit which is located in the bottom of the automatic transmission.
Tasks
General
The fully integrated Transmission control unit determines the current operating condition of the vehicle and actuates all gear change sequences taking shifting comfort and the driving situation into consideration.
Flash programming
The Transmission control system in the control unit for the fully integrated Transmission control (VGS) is flashable i.e. the complete software in the control unit can be changed (replaced). The software required for control unit programming is stored on the diagnosis software DVD.
CAN bus
The fully integrated Transmission control unit is connected via the drive train CAN (CAN C) to the CAN network of the vehicle and exchanges data with other control units.
Input and output signals
The following input signals are evaluated by the fully integrated Transmission control unit and the appropriate output signals are generated:
- Direct input signals
- Direct output signals
- CAN input signals
- CAN output signals
Direct input signals
- Circuit 30
- Emergency-P from electronic ignition lock control unit (N73)
- Turbine wheel rpm sensor (Y3/8n1)
- Internal Transmission rpm sensor (Y3/8n2)
- Output shaft rpm sensor (Y3/8n3)
- Transmission oil temperature sensor (Y3/8s2) (integrated into fully integrated Transmission control unit)
- Park pawl position sensor (Y3/8s4)
- Pressure sensor (Y3/8b5)
Direct output signals
- Electric oil pump (M42)
- Park pawl lift solenoid (Y3/8l1)
- Lubrication pressure solenoid (Y3/8y12)
- K81 clutch control solenoid (Y3/8y13)
- K38 clutch control solenoid (Y3/8y14)
- K27 clutch control solenoid (Y3/8y15)
- B08 multidisk brake control solenoid (Y3/8y16)
- B05 multidisk brake control solenoid (Y3/8y17)
- B06 multidisk brake control solenoid (Y3/8y18)
- Working pressure solenoid (Y3/8y19)
- Torque converter lockup clutch solenoid (Y3/8y20)
CAN input signals
Instrument cluster (A1)
- Vehicle speed signal
Electronic ignition switch control unit
- Electronic ignition lock status
- Release of drive authorization system stage 4 (FBS4)
- "Key-P function" request
- Circuit 50 signal, influencing fault storage
- Diagnostic CAN interface (CAN D) for diagnostic connector (X11/4)
Electronic Stability Program control unit (N30/4)
- Wheel speed and direction of rotation, substitute value in the event of failure of the output shaft rpm sensor
- Adjusted braking torque, change of shift strategy, brake the vehicle, automatic 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®) requested shift into "N", interruption of power flow
- Brake light switch (S9/1), change of shift strategy, brake vehicle, automatic Transmission downshifts earlier.
- ESP® specified torque, torque reduction or torque increase
Steering column tube module control unit (N80)
- Steering wheel downshift button signal (S110/1)
- Steering wheel upshift button signal (S111/1)
- DIRECT SELECT lever signal (S1613)
CDI control unit (N3/9) or ME-SFI [ME] control unit (N3/10)
- Requests for catalytic converter heating
- Shift request
- Selector lever position
- Transmission mode selection
- Engine torque
- Engine coolant temperature
- Engine speed
- Engine load
- Kickdown
- Rpm limitation ACTIVE
- Engine management limp-home mode
- Status of engine management
- Engine running status
Trailer recognition control unit (N28/1) (for CODE 550 (Trailer hitch))
- Trailer recognition signal
Transmission mode control panel (N72/4) (without CODE 430 (On & Offroad package))
- Transmission mode control
Off-road control panel control unit (N72/3) (with CODE 430 (On & off-road package))
- Off-road package Transmission mode control (N72/3s1)
Left front door control unit (N69/1)
- Status of left front door safety catch microswitch (A85s1)
CAN output signals
Instrument cluster
- Selector lever position for gear indicator (A1p12)
- Display, multifunction display (A1p13)
- Program selection for Transmission mode display in multifunction display
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", "N"
- Engine idle target engine speed (for actuation of the torque converter lockup clutch)
- Status of torque converter lockup clutch
- Transmission limp-home mode
ESP® control unit
- Wheel torque factor, overall gear ratio
- Actual gear, target gear
- Transmission variant, recognition of basic variants, difference in gear ratios
Electronic ignition switch control unit
- Diagnostic CAN interface to diagnostic connector
| Wiring diagram for fully integrated Transmission control unit | PE27.19-P-2103-97NBA |