Thrustmaster T818 User Manual page 66

If you are using a T2PM, T3PA or T3PM pedal set in
T-LCM type, this pedal set will not function properly:
the pedals' values will no longer reach 100%.
In order for the pedal set to function properly again
(and reach the 100% values), you must manually
switch the base's mode to T2PM-T3PA-T3PM type.
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