When Driving on a Curve
WARNING: This page is about a different car, the 2008 Infiniti M45 and 2008 Infiniti M35. However, it is still accessible from the selected car via links, so may be relevant.
TCM receives side G sensor signal from ABS actuator and electric unit (control unit). Holding gear at the 3rd or 4th based on the signal prevents shift-up and kick-down and controls to drive smoothly.