Safety Functions

Safety functions
By way of plausibility checks and checking the line connections for shorts or breaks, the control unit can detect and store defects. Manually engaged downshifts are not carried out at excessively high speeds. At a vehicle speed above approx. 8 km/h, the reverse lockout function prevents reverse being shifted hydraulically.

In the event of failure of the transmission control or when defects are detected which lead to critical driving situations (e.g. impermissible downshifts), the mechanical emergency program is activated, i.e. the transmission control unit is switched off and the failure display activated. A self-test of the entire safety hardware is carried out during each new start.

Restricted driving of the vehicle is possible in the emergency program (4th gear). Various substitute programs are also made available depending on the type of defect which has occurred.