Transmission Control Module Safety Functions

If one or more components and/or sensors malfunction, the automatic control module will active the appropriate replacement function. This guarantees the non-destructive operation of the transmission with respective implications on shift function and quality.

When malfunctions are detected by the transmission, a distinction is made between 4 possible statuses.

1. The malfunction is so minor that it is possible to continue driving with a replacement program while maintaining driving safety. The driver is not notified of this via the Selector Lever Transmission Range Display -Y5-. The display shows the selector lever position normally. When can changes in driving behavior actually be detected.
2. The individual lever positions blink in the Selector Lever Transmission Range Display -Y5-. The driver is shown that a desired gear selection is currently not possible. Example: Reverse, lever in "R" and vehicle dives backward. If "D" is engaged in this situation, the letter "D" blinks in the Selector Lever Transmission Range Display -Y5-. In this case, the control module prevents 1st gear from being engaged to avoid damaging the transmission. The gear is only engaged when vehicle is stopped. If this is tested, do so carefully!
3. The Selector Lever Transmission Range Display -Y5- is completely lit up and blinks. The selector lever position is indicated. Example: the transmission fluid temperature is too high. Reasons could include: towing a trailer with too large of a load, auxiliary installations on front of vehicle, lack of cooling air.
4. The selector lever position cannot be recognized. The Selector Lever Transmission Range Display -Y5- blinks. Differences in the driving and shifting can definitely be felt. It is not possible to shift into reverse. There is a serious malfunction, a sub-transmission is switched off, transmission repair is necessary.