ASC (Adaptive Shift Control)
INPUT/OUTPUT SIGNAL CHART
| Item | Signal | TCM function | Actuator |
|---|---|---|---|
| Input speed sensor 1, 2 | Input speed | ASC (Adaptive shift control) |
|
| 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.
- 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.