Electronic transmission control unit, component description - GF27.60-P-5164ACS
TRANSMISSION 722.649 in MODEL 216.3 as of Model Year 09/Modification Year 08
TRANSMISSION 722.649 in MODEL 221.1 as of Model Year 09/Modification Year 08
View, passenger side footwell, model 221
Location
The ETC [ETS] control unit EGS is located on the plate in the front passenger footwell.
Task
General
The ETC [EGS] control unit determines the instantaneous operating condition of the vehicle and controls all gear change sequences taking into account shift comfort and the driving situation.
Flash programming
The transmission control in the ETC control unit is flashable, i.e. the complete software of the control unit can be exchanged (replaced). The software required to program the control units is stored on the STAR DIAGNOSIS DAS Update DVD.
CAN data bus
The ETC [EGS] control unit is connected to the CAN system of the vehicle via the drive train CAN (CAN C) and exchanges data with other control units.
Input and output signals
The following input signals are evaluated by the ETC control unit and the corresponding output signals are issued:
- 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 shift solenoid valve (Y3/6y3)
- 3-4 shift solenoid valve (Y3/6y4)
- 2-3 shift solenoid valve (Y3/6y5)
- Torque converter lockup PWM solenoid valve (Y3/6y6)
CAN input signals
Intelligent servo module for DIRECT SELECT (A80)
- Selector lever position
EIS [EZS] control unit (N73)
- Start enable (drive authorization system)
- Request of Key-P function
- Circuit 50 signal, influencing fault storage
Trailer recognition control unit N28/1 (on model 221 and code (550) Trailer hitch)
- Trailer recognition status
ESP control unit (N47-5)
- Wheel speeds and direction of rotation, substitute values in the event of failure of rpm sensor 2 (Y3/6n2) and rpm sensor 3 (Y3/6n3)
- 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
- BAS release switch (A7/7s1), change of shift strategy, brake the vehicle, transmission shifts down earlier
- ESP specified torque, torque reduction or torque increase
Steering column tube module (N80)
- Steering wheel gear shifter MINUS (S110/1) signal
- Steering wheel gear shifter PLUS (S111/1) signal
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
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)
ESP control unit (N47-5)
- Wheel torque factor, overall gear ratio
- Actual gear, target gear
- Transmission variant, recognition of basic variants, difference in gear ratios
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
Central gateway control unit (N93)
- Diagnostic data
| Wiring diagram for intelligent servo module (ISM) control unit | A80 | Model 216 | PE27.60-P-2101-99CAA | |
| A80 | Model 221 | PE27.60-P-2101-99SAA | ||
| Wiring diagram for electronic transmission control (ETC) control unit | N15/3 | Model 216 | PE27.19-P-2101-99CAA | |
| N15/3 | Model 221 | PE27.19-P-2101-99SAA |