Functional Operation
TRANSMISSION OPERATION AND SHIFT SCHEDULINGThe transmission covered in this manual has unique shift schedules depending on the temperature of the transmission oil. The transmission oil temperature has a decisive effect on the shift quality of the transmission. The shift schedule is modified to extend the life of the transmission while operating under extreme conditions and to improve driver comfort by modifying shift schedules.
The transmission oil temperature is measured with a Temperature Sensor on the NAG1 transmission. The Temperature Sensor is an integral component of the Transmission Solenoid assembly. If the Temperature Sensor is causing a problem, a DTC will be set in the TCM.
The Transmission Temperature Sensor is wired in series with the Park /Neutral (P/N) switch. The P/N switch is also located in the transmission. The transmission temperature is only read by the TCM when the P/N switch closes while in the R. D position. When the shifter lever is in the park or neutral position, the P/N switch opens and the temperature being displayed is Engine temperature.
AutoStick Feature (If equipped)
This feature allows the driver to manually shift the transaxle when the shift lever is moved sideways to the (+ / -) in position D to adjust the shift range.
TRANSMISSION ADAPTIVES INITIALIZE AND STORE
Initialize Adaptive
This TCM function should be used when a new transmission has been placed in the vehicle. This command will reset the TCM adaptive to the factory setting.
Store Adaptive
This command should be used after the vehicle has been test driven by the technician to store any learned adaptive changes that occurred during the test drive. During normal operation adaptive are updated every 10 minutes. Using this command the latest adaptive will be written to the TCM immediately.