ASC (Adaptive Shift Control)

Input/Output Signal Chart

Item	Signal	TCM function	Actuator
Input speed sensor 1, 2	Input speed	ASC (Adaptive shift control)	High and low reverse clutch solenoid valve Direct clutch solenoid valve Input clutch solenoid valve Low brake solenoid valve 2346 brake solenoid valve Front brake solenoid valve Torque converter clutch solenoid valve Line pressure solenoid valve Anti-interlock solenoid valve
Output speed sensor	Vehicle speed
A/T fluid temperature sensor	ATF temperature
ECM	Engine speed signal*
	Accelerator pedal position signal*
	Closed throttle position signal*
	Engine and A/T integrated control signal (engine torque)*
ABS actuator and electric unit (control unit)	Side G sensor signal*
BCM	Stop lamp switch signal*
Combination meter	Tow mode switch signal*

*: This signal is transmitted via CAN communication line.

When driving on an up/down slope
ASC judges up/down slope according to engine torque data transmitted from the ECM and vehicle speed. Fixing at 4GR, 5GR or 6GR on an up-slope prevents shift hunting and controls the vehicle to gain optimum driving force. On a down-slope, automatic shift-down to 4GR, 5GR or 6GR controls to gain optimum engine brake.

When driving on a curve

TCM receives the side G sensor signal from the ABS actuator and electric unit (control unit). It locks to 4GR, 5GR or 6GR position in moderate cornering or to 3GR position in sharp cornering based on this signal. This prevents any upshift and kickdown during cornering, maintaining smooth vehicle travel.

In driving condition where acceleration, deceleration, or lateral acceleration continues, it corrects gear selection in order to keep a smooth vehicle speed during the curve and to give an adequate driving force at the curve end.
- When acceleration pedal is quickly released at curve entrance etc., it prevents an unnecessary shift-up.
- On braking operation at curve entrance, it gives an early shift-down according to the deceleration.
- In a sporty driving condition, it selects lower gear early even on a light braking operation, giving greater importance on driving force.

Courtesy of NISSAN NORTH AMERICA, INC.

Tow Mode

High driving torque is required for towing a heavy load. The tow mode enables torque-oriented driving by changing the shift schedule to that of delaying A/T gear shift timing (compared to normal driving).
TCM receives tow mode switch signal from combination meter via CAN communication. The tow mode turns ON when TCM receives the signal. TCM transmits a tow mode indicator lamp signal to the combination meter via CAN communication to turn ON the tow mode indicator lamp mounted in the combination meter.