Function Of Transmission Control (722.6 In Model 209.376 Up To 05/31/03, 211.076, 230.474 Up To 08/31/03)

The transmission control is divided into electronic and hydraulic transmission control.

While the electronic transmission control (ETC) takes over the gear selection and the adaptation of pressures to the moment to be transmitted, the power supply control of the transmission takes place via the hydraulic elements of the electro-hydraulic control unit. The oil supply to the hydraulic elements, such as the hydrodynamic torque converter, the shift elements and the hydraulic transmission control, is provided by way of an oil pump connected to the torque converter.

The electronic transmission control (ETC) makes possible precise adaptation of the pressures to the respective operating conditions and to the engine output during the shift phase, which leads to a significant increase in shift quality.

Furthermore, electronic transmission control (ETC) offers the advantage of flexible adaptation to various vehicle and engine versions.

The driver can choose between 3 transmission modes, "S" (standard program), "W" (winter program) and "M" (manual program). These also provide different gear ratios for reverse gear.

It is possible to reach the RPM limit in the individual gears at full throttle and kickdown. The shift range can be changed in the forward gears while driving. However, the electronic transmission control (ETC) prevents an unacceptably high engine RPM by means of downshift protection.

Electronic transmission control (ETC) operates in relation to the following:

• Vehicle Speed
• Position Of The Selector Lever
• Accelerator Pedal Position
• Program Selection ("M/W/S")
• The preselected gear (with program selection "M").
• State Of The Transmission
• CAN Signals

1. ETC Control Module, Location/Task
   
   See ETC CONTROL UNIT, LOCATION/TASK .
2. Electric Control Unit, Location/Task/Design/Function
   
   See ELECTRIC CONTROL MODULE, LOCATION/TASK/DESIGN/FUNCTION .
3. Starter Lockout Contact, Location/Task/Design/Function
   
   See STARTER LOCK-OUT CONTACT, LOCATION/TASK/DESIGN/FUNCTION .
4. Temperature Sensor, Location/Task/Design/Function
   
   See TEMPERATURE SENSOR, LOCATION/TASK/DESIGN/FUNCTION .
5. Speed Sensor, Location/Task/Function
   
   See WHEEL SPEED SENSOR, LOCATION/TASK/FUNCTION .
6. Oil Pump, Location/Task/Design/Function
   
   See LOCATION/TASK/DESIGN/FUNCTION OF OIL PUMP .