Transmission Control Unit 6HP

Mechatronic Solenoid Valves (MV), Electronic Pressure Control Valves (EDS)

The Mechatronic (electronic module and hydraulic unit) has various solenoid valves and electronic pressure control valves.


Brief description of components (solenoid valves)
The solenoid valves are 3/2-way valves, i.e. valves with 3 connections and 2 switch positions.

Brief description of components (electronic pressure control valves)
The electronic pressure control valves convert electric current into a proportional hydraulic pressure and thus activate hydraulic valves with their corresponding switch elements.
Two types of electronic pressure control valves are fitted:
- EDS with rising characteristic curve (green cap)
Pressure range 0 to 4.6 bar

- EDS with falling characteristic curve (black cap)
Pressure range 4.6 to 0 bar

Mechatronic calibration following repairs
If the Mechatronic has to be replaced in the course of repairs, it must be labelled as a replacement Mechatronic using the service function "Mechatronic calibration".
The service function must also be run after repair to individual electronic pressure control valves or of the electronic module. Here, the replaced electronic pressure control valves are marked in the control unit as exchange parts. If this identification is not carried out, the shift quality can be reduced significantly.
After replacement of the entire gearbox, the service function does not have to be run, as the gearbox is already fully calibrated on delivery.
In all cases, it is advisable to delete stored adaptation values.