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Home >> Infiniti >> 2009 >> M45 Base >> Repair and Diagnosis >> Transmission >> Automatic Transmission >> [5AT: Re5R05A] >> Service Information >> A/T Control System >> Shift Control >> ASC (Adoptive Shift Control)
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ASC (Adoptive Shift Control)

ASC automatically shifts or hold at the 3rd or 4th gear on certain roads (up/down slope and curve) and driving condition.

Fig 1: Identifying Driving Position Condition
G05218525Courtesy of NISSAN MOTOR CO., U.S.A.

When Driving on an Up/Down Slope

ASC judges up/down slope according to the angle of accelerator pedal and vehicle speed. Holding gear at the 3rd or 4th on an up-slope prevents shift hunting and controls the vehicle to gain maximum driving force. On a down-slope, automatic shift-down to the 3rd or 4th gear controls to gain maximum engine brake.

When Driving on a Curve

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.