Transmission 9113 · ? Warm-up map ? Ma

Transmission 9113 ? Warm-up map ? Manual intervention in selector position "D" A warm-up map which is activated at engine temperatures < 32 °C is integrated in the To permit manual downshifting in the auto- stepless shift map adaptation. In the warm- matic gutter, e.g. up map, the shift-up points are offset to higher engine speeds, the transmission starts ? before curves in 1st gear and the torque converter lockup clutch is opened. If the reverse gear is en- ? when entering built-up areas gaged during the warm-up phase, the vehicle starts in a short reverse gear. These meas- ? when driving downhill ures result in both the engine and catalytic converter rapidly reaching their operating ? when selecting first gear before moving temperatures. off Unlike previous transmissions, the new Tip- tronic transmission shifts back into the first it is also possible to actuate the upshift and gear if the vehicle is started in first gear and downshift buttons in the automatic gutter, then stopped again. i.e. the Tiptronic enters the manual program In addition, if the selector lever passes when the upshift or downshift button is through "N" as it is moved to a different posi- pressed. "M" appears in the instrument clus- tion, the first gear is always engaged for ap- ter and the required shift operation is per- prox. one second, irrespective of tempera- formed. ture. If the vehicle is driven off during this At the same time, an 8-second timer is time, the transmission shifts into the first started in the control unit. If the upshift or gear. downshift button is pressed again within the 8 seconds, the timer is restarted. The Tip- tronic automatically returns to automatic mode ("D" appears in the instrument cluster)? Road resistance if: The road resistance can be derived from the position of the accelerator pedal, the engine ? the timer has expired, the vehicle is not speed and vehicle speed, and the transmis- cornering and is not overrunning. sion can then be changed to a shift map which provides the best gear. This, in turn, ? the driver has activated the kick-down reduces shift frequency. function. ? Reduction in engine torque When gear shifting is performed, the DME control unit briefly suppresses ignition in order to reduce engine torque which, in turn, ensures smooth shifting. 3 - 8 Service Information 2002