TSB : Transmission Adaptive Values Learn: Notes

Details

Transmission Adaptive Values Learn is a procedure for 6 speed automatic transmissions in which a series of tests are run to allow the transmission control module (TCM) to learn individual clutch characteristics. Once the clutch data is learned, Transmission Adaptive Values Learn translates it into the adaptive data cells, which the TCM uses for clutch control during shifts. The scan tool provides initiation of the Transmission Adaptive Values Learn procedure. This procedure is to be used following transmission repair. The Transmission Adaptive Values Learn procedure must be performed when one of the following repairs have been made to the vehicle. Failure to perform the procedure after one of the following repairs may result in poor transmission performance, as well as transmission DTCs being set: Transmission internal service/overhaul Valve body repair or replacement Control solenoid valve assembly replacement TCM software/calibration update Any service in response to a shift quality concern NOTE: Ensure the following conditions are met before performing the Transmission Adaptive Values Learn procedure: Drive wheels are blocked Parking brake is applied Service brake is applied Transmission gear selector has been cycled from Park to Reverse 3 times in order to purge air from the reverse clutches. Zero percent throttle and no external engine RPM control Transmission fluid temperature is between values listed below, if you attempt to run the test above or below these temperatures, the test will not start: MY 2011 and prior 70-95°C (158-203°F) MY 2012 Gen 1 70-95°C (158-203°F) MY 2012 Gen 2 64-95°C (147-203°F) MY 2013 Gen 1 70-95°C (158-203°F) MY 2013 Gen 2 70-76°C (158-169°F) MY 2014 Gen 2 70-76°C (158-169°F) MY 2014 Gen 3 86-106°C (187-223°F) MNH with LKW MY 2015-MY 2017 Gen 2 64-76°C (147-169°F) MY 2015-MY 2017 Gen 3 86-106°C (187-223°F) Transmission Adaptive Values Learn will abort if the transmission fluid temperature increases to the values listed below: MY 2011 and prior 110°C (230°F) MY 2012 Gen 1 110°C (230°F) MY 2012 Gen 2 100°C (212°F) MY 2013 Gen 1 110°C (230°F) MY 2013 Gen 2 86°C (187°F) MY 2014 Gen 2 86°C (187°F) MY 2014 Gen 3 126°C (259°F) MY 2015-MY 2017 Gen 2 86°C (187°F) MY 2015-MY 2017 Gen 3 126°C (259°F) NOTE: If at any time during the procedure, required conditions are not met, Transmission Adaptive Values Learn Adapts may abort and the process may need to be started again from the beginning. If this occurs, the transmission will be left in a neutral state until the controller is shut down, key OFF and remove the scan tool and wait for more than 30 seconds prior to re-try procedure. If the procedure repeatedly fails, a limit that engineering set is being exceeded and there is possibly a transmission hardware issue. Starting the procedure at the minimum temperature will help prevent the procedure from aborting due to an over temperature condition. Use the scan tool to navigate to Transmission Adaptive Values Learn by selecting the following: Module Diagnostics Transmission Control Module Configurations/Reset Functions Transmission Adaptive Values Learn NOTE: If at any time during the procedure, required conditions are not met, Transmission Adaptive Values Learn may abort and the process may need to be started again from the beginning. Use the scan tool to perform the Transmission Adaptive Values Learn procedure. As the procedure is being performed, the scan tool data display will provide operator instructions. Follow the scan tool instructions, as required. Once the procedure is complete, shut OFF the engine and power down the TCM. You will lose communication to the scan tool. NOTE: When the Transmission Adaptive Values Learn procedure is completed, the transmission will remain in a neutral state until the controller shuts down. If after 1-2 minutes of sitting, with the key OFF and scan tool removed, the vehicle remains in a neutral state, disconnect the battery and wait 5-10 minutes and then hook the battery back up. Reverse and drive should return. Restart the engine. This will complete the Transmission Adaptive Values Learn procedure.