Transmission Control Module Safety Functions

Transmission Control Module Safety Functions

If components or sensors fail, the Direct Shift Gearbox (DSG) Transmission Mechatronic (J743) activates the corresponding emergency mode replacement program. The transmission can still be operated without causing damage, but shift function and quality are affected.

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

1. A malfunction is saved and a replacement program is activated at the same time. The gear display in the instrument cluster does not change and indicates the selector lever position engaged. Driving further is possible with restrictions, the condition is not critical for either driving safety or the transmission. The driver will only notice the fault - if it is noticed at all - in terms of handling problems and will then automatically consult Audi Service.

2. The individual selector lever positions blink in the instrument cluster gear display. The driver is shown that a desired gear selection is currently not possible. Example: If the vehicle rolls backwards in "R" selector lever position and the gear indicator "D" blinks when selector lever position "D" is engaged. To prevent damage to the transmission, the DSG transmission Mechatronic prevents 1st gear from being engaged as long as the vehicle is rolling backwards. 1st gear is engaged only when the vehicle comes to a standstill.

3. The gear display lights up completely and blinks, the position engaged is highlighted. The driver is notified of a temporary serious malfunction. Example: The transmission was overloaded and the maximum temperature in the transmission is exceeded, possibly due to towing a trailer with excessively high load. Driving further is possible once the transmission has cooled, but high load must be avoided.

4. The gear display blinks, the position engaged is not recognized. The driver is notified of a permanent serious malfunction. Because individual gears can no longer be engaged, this condition is critical for driving safety and for the transmission. This type of display instructs this driver to go to an Audi service center.