ETC Control Unit, Task

ETC Control Module, Task

Transmission 722.6 Up To 31.May.04




N15/3 EGS control unit
X11/4 Data link connector
Y3/6b1 Transmission oil temperature sensor
Y3/6n2 RPM sensor 2
Y3/6n3 RPM sensor 3
Y3/6s1 Starter lockout contact
Y3/6y1 Modulating pressure control solenoid valve
Y3/6y2 Shift pressure control solenoid valve
Y3/6y3 1-2 and 4-5 shift solenoid valve
Y3/6y4 3-4 shift solenoid valve
Y3/6y5 2-3 shift solenoid valve
Y3/6y6 Torque converter lockup PWM solenoid valve




Shows model 209.461
A1 Instrument cluster
N3/10 ME-SFI [ME] control unit
N15/3 ETC control unit
N15/5 Electronic selector lever module control unit
N47-5 ESP and BAS control unit
N63/1 DTR control unit
N73 DI control unit

The ETC control unit (N15/3) measures the current operating state of the vehicle and controls all shifting operations taking the ease of shifting and driving situation into consideration.

It receives input signals as operating data from the:
- Starter lockout contact (Y3/6s1)
- Transmission oil temperature sensor (Y3/6b1)
- RPM sensor 2 (Y3/6n2)
- Rpm sensor 3 (Y3/6n3)

In addition there is a connection to the following via the Controller Area Network bus Class C (engine compartment) (CAN-C):
- Instrument cluster (A1)
- ME-SFI control unit (N3/10) or CDI control unit (N3/9)
- Electronic selector lever module control unit (N15/5)
- ESP and BAS control unit (N47-5)
- DTR control unit (N63/1)
- EIS [EZS] control unit (N73)

The ETC [EGS] control unit takes over the actuation of the solenoid valves for modulating and shift pressure and for the shifting gears (N15/3).
The necessary pressure in relation to the torque to be transmitted, is computed from all the input signals.

The following information from other systems is processed in so doing.
Motor electronics control unit (N3/10) or CDI control unit (N3/9):
- Request: start off in 1st gear
- Request: Active downshift
- Request: status of torque converter lockup clutch
- Limp-home mode
- Cruise control operating
- Engine speed limiter active
- Engine status
- Engine oil status
- Specified torque
- Starter running
- Idle speed
- Shift curve offset
- Pedal value
- Inertia fuel shutoff
- Targeted gear
- Kick-down

Electronic selector lever module control unit (N15/5):
- Selector lever position
- Transmission mode switch (S16/5)
- Locking solenoid energized

ESP and BAS control unit (N47-5):
- Request: gearshift in "N"
- Request: targeted gear
- Request: Active downshift
- Wheel speeds, direction
- Braking torque
- Lateral acceleration
- Shift curve offset
- Cruise control OFF
- Parking brake operated
- ESP brake intervention active
- System status

Electronic ignition switch control unit (N73):
- Refrigerant compressor (A9) ON
- Circuit 50 engine start switch (circuit 50)

The following information is output to other systems.

Instrument cluster (A1):
- Transmission mode selection at transmission mode switch (S16/5)
- Selector lever position
- Transmission variant

Motor electronics control unit (N3/10) or CDI control unit (N3/9):
- Request: engine torque
- Drive torque control
- Limp-home
- Starter release
- Engine emergency stop
- Transmission variant
- Actual gear engaged/target gear
- Transmission mode selection at transmission mode switch (S16/5)
- Torque converter lockup clutch status
- Selector lever position

ESP and BAS control unit (N47-5):
- Kick-down
- Transmission variant
- Actual gear engaged/target gear

DTR control unit (N63/1)
- Kick-down
- Actual gear engaged/target gear
- Wheel torque factor

Electronic ignition switch control unit (N73):
- Selector lever position