Xtool D9 Pro User Manual page 86

the MIL turns off. This function can complete the self-learning of
the gearbox and improve the quality of shifting.
After the engine ECU, crankshaft position sensor, or crankshaft
flywheel is replaced, or the DTC 'gear not learned' is present, gear
learning must be performed.
The operation guidelines of the Gear learning function are
shown as below:
1. Enter the Gear learning menu and choose relevant models
according to the vehicle being tested.
2. Turn on the ignition switch to start the vehicle.
3. Enter the Tooth Learning menu.
Read carefully and complete the requisites listed before
performing the gear learning function. And press OK after
completing the instructions shown
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