Gearbox adaptive values, learning
This function is a procedure for the 6-speed automatic gearboxes, at which a series of tests is run to let the transmission control unit (TCM) learn the clutches individual characteristics. Once these are learned, transfers the "Gearbox adaptive values, learning" this to adaptive data cells, which TCM uses to regulate the clutches during shifts.
This function is used to initiate learning of the gearbox adaptive values and shall be used after the repair of the gearbox.
Learning of the gearbox adaptive values must be performed when one of the following repairs has been done on the vehicle. If you don't perform this function after any of the following repairs has been done, it may result in poor performance of the gearbox and gearbox related fault codes can be activated:
Internal service/repair of the gearbox.
Repair or replacement of the valve housing.
Replacing of the control solenoid valve unit.
Update of the TCM software/calibration.
All types of services that has been performed to rectify a shifting problem.
If the required conditions are not met at any time during the procedure, it is possible that the learning is canceled and you must start all over again. If this happens, leave the gearbox in neutral position until the control unit is turned off, the key is turned to OFF and the diagnostic tool is disconnected. Wait for at least 30 seconds before attempting to start the procedure again. If you repeatedly fail to complete the procedure, a limit, set by the construction, is exceeded and there may be faults in the transmission hardware.
Zero percent throttle opening and no external speed control.
The gearbox oil temperature is between the values below, if you are trying to run the function above or below those temperatures, the function will not start:
Model year 2011 or earlier 70-95 °C (158-203 °F).
Model year 2012 Gen. 1 70-95 °C (158-203 °F).
Model year 2012 Gen. 2 64-95 °C (147-203 °F).
Model year 2013 Gen. 1 70-95 °C (158-203 °F).
Model year 2013 Gen. 2 64-76 °C (147-169 °F).
Model year 2014 and later 64-76 °C (147-169 °F).
The gear selector has been moved from parking to reverse three times to bleed the rear clutches. Then, the gear selector must be in park- or neutral position.
The learning of the gearbox adaptive values, will be terminated if the gearbox oil temperature exceeds the values below:
Model year 2011 or earlier 110 °C (230 °F).
Model year 2012 Gen. 1 110 °C (230 °F).
Model year 2012 Gen. 2 100 °C (212 °F).
Model year 2013 Gen. 1 110 °C (230 °F).
Model year 2013 Gen. 2 86 °C (187 °F).
Model year 2014 and later 86 °C (187 °F).
A dialogue box shows status of the gearbox oil temperature, wait for the correct temperature. See test conditions.
Press "OK" to continue or "Cancel" to quit.
The function starts. A dialogue box shows "Gearbox oil temperature" and "Gearbox adaptive values learn".
Follow the instructions required.
When the learning is done, press "OK" to complete the function.
Open the driver door for 30 seconds.
When the function is completed, the transmission will remain in neutral position until the control unit turns off. If the vehicle still is in neutral position after 1-2 minutes with the key in position OFF and the diagnostic tool removed. Disconnect the battery, wait 5-10 minutes and then connect the battery again. Then should Reverse and Drive return.
Restart the engine. This completes the function.
If "Gearbox adaptive values, learning" is unable to run even though all the above conditions are met, check the following:
Check the vehicle model year.
Check that the gearbox oil temperature is within range, as described above for the vehicle's model year and the gearbox generation.
The brakes and the brake switch works properly.
Closed throttle and the engine speed increases above 1500 rpm at the beginning of the test.
The gear position switch is properly adjusted and is working.
The line pressure control can give 1000 kPa and is within the specifications.
The vehicle doesn't move or vibrates heavily.
The clutches are properly assembled.