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ADAPTATION To equalize tolerances and wear, an automatic adaptation takes place for: • Shift Time. • Clutch Filling Time. • Clutch Filling Pressure. • Torque Converter Lock-Up Control. Adaptation data may be stored permanently and to some extent, can be diagnosed. Driving Style Adaptation The shift point is modified in steps based on the information from the inputs. The control module looks at inputs • vehicle acceleration and deceleration (calculated by the TCM). • rate of change as well as the position of the throttle pedal (fuel injection information from the PCM). • lateral acceleration (calculated by the TCM). • gear change frequency (how often the shift occurs). Based on how aggressive the driver is, the TCM moves up the shift so that the present gear is held a little longer This adaptation has no memory. The adaptation to driving style is nothing more than a shift point modification meant CONTROLLER MODES OF OPERATION Permanent Limp-In Mode When the TCM determines there is a non-recoverable condition present that does not allow proper transmission 9 P 9 position. When the shifter has been placed in 9 P, 9 the transmission only allows 2nd gear operation. If this occurs while the vehicle is not moving, the transmission only allows operation in 2nd gear. Temporary Limp-In Mode This mode is the same as the permanent Limp-In Mode except if the condition is no longer present, the system Under Voltage Limp-In Mode When the TCM detects that system voltage has dropped below 8.5 volts, it disables voltage-dependant diagnostics Hardware Error Mode When the TCM detects a major internal error, the transmission is placed in the permanent Limp-In Mode and Loss of Drive If the TCM detects a situation that has resulted or may result in a catastrophic engine or transmission problem, the 8E - 302 ELECTRONIC CONTROL MODULES - SERVICE INFORMATION LX |