F unctio nal descriptio n o f P o rsche T iptro nic · Like the Tiptronic used in previous models,

911 Transmission 3 F unctio nal descriptio n o f P o rsche T iptro nic Like the Tiptronic used in previous models, the Tiptronic in the 911 Turbo has two selec- tor gutters. In the right-hand gutter and with the selector lever in position "D", shifting into higher and lower gears is performed automatically. If the selector lever is moved into the left-hand gut- ter ("M"), it is possible to shift into higher and lower gears manually. As with other models, no gear lock is pro- vided in the 911 Turbo which means that the selector lever positions P – R – N – D are available. P = Park R = Reverse N = Neutral D = Drive (automatic shifting 1st – 2nd – 3rd – 4th – 5th gear) M = Manual program Driving in selector lever position "D" If the selector lever is moved to "D", an extremely intelligent driving program is performed. Virtually stepless adaptation to the driving style and road conditions is carried out on the basis of the fol-lowing information. Variable Type of measurement Accelerator pedal position Resistance value and change in resistance at potentiometer of accelerator pedal sensor over a certain period, by DME control unit via CAN* Vehicle speed By PSM control unit via CAN Longitudinal vehicle acceleration By PSM control unit via CAN Lateral vehicle acceleration Signal from lateral acceleration sensor of PSM Engine speed By DME control unit via CAN Road resistance (incline) Calculated value for vehicle speed and accelerator pedal posi- tion from DME control unit Altitude Pressure sensor in DME control unit * CAN = Controler Area Network 2002 Service Information 3 -5