ETC control unit, task - GF27.19-P-4012-02T

TRANSMISSION 722.6 in MODEL 211 up to 31.05.04 

Shows model 211.065 

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, SPS [PML] and BAS control unit (N47-5)
• DTR control unit (N63/1)
• EIS [EZS] control unit (N73)
• Central gateway control unit (N93)

The ETC control unit (N15/3) controls the solenoid valves for modulating and shift pressure and for shifting gears.

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
• 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

Electronic ignition switch control unit (N73):

• Refrigerant compressor (A9) ON
• Circuit 50 engine start switch (circuit 50)

Central gateway control unit N93

• Request: diagnosis

ESP, SPS [PML] and BAS control unit (N47-5):

• Request: gearshift in "N"
• Request: targeted gear
• Request: Active downshift
• Torque request
• Stop lamp switch (S9/1)
• Wheel speeds
• Braking torque
• Lateral acceleration
• Shift curve offset
• Cruise control OFF
• Parking brake operated
• System status

The following information is output to other systems.

Instrument cluster (A1):

• Transmission mode selection at transmission mode switch (S16/5)
• Selector lever position

Motor electronics control unit (N3/10) or CDI control unit (N3/9):

• Request: engine torque
• 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
• Kick-down

Electronic ignition switch control unit (N73):

• Selector lever position

ESP, SPS [PML] and BAS control unit (N47-5):

• Kick-down
• Transmission variant
• Actual gear engaged/target gear

DTR control unit (N63/1)

• Kick-down
• Transmission variant
• Actual gear engaged/target gear
• Wheel torque factor

Central gateway control unit N93

• Transmission oil temperature
• Transmission variant
• Selector lever position
• Diagnosis