SHIFT CONTROL OUTLINE [SJ6A-EL]

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• Based on the shift diagram, shift solenoids A, B, C, D, E, F, and G are controlled according to the vehicle speed and the throttle opening angle, and the shift control of the transmission is performed.
• When certain conditions are met, the TCM selects a shift mode suitable to the driving conditions and automatically switches to the mode to perform smooth shifting.

Active Adaptive Shift (AAS) Mode

• When certain conditions are met, AAS mode is automatically selected from normal mode. In AAS mode, the shift point is set higher than the normal shift point so that high-engine speed, high-output conditions are available.
• AAS mode is canceled when the vehicle speed remains constant (stable vehicle behavior).

Conditions for switching to active adaptive shift (AAS) mode

  • The accelerator pedal is depressed fully to accelerate rapidly while driving in D range.
  • Rapid acceleration or deceleration continues for a certain period of time while driving in D range.

Shift control in active adaptive shift (AAS) mode

  • Shift control is performed according to the shift pattern in AAS mode.
  • When the driver releases the accelerator pedal fully and rapidly, the gear position is maintained at the position before accelerator pedal was released. Due to this, re-acceleration and vehicle control performance have been improved. If the accelerator pedal is released slowly, the gears shift up according to the shift pattern.
  • While cornering the vehicle, the gear position is maintained at the position before the vehicle was cornered to facilitate re-acceleration after the corner. The gears do not shift up if the accelerator pedal is depressed fully while cornering the vehicle.

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Forced cancellation of active adaptive shift (AAS) mode

  • AAS mode is forcibly cancelled under the following conditions:
    ― The vehicle speed in the cruise control system is reset.
    ― The selector lever is shifted to M range while driving in D range.

Down Slope Mode

• While the vehicle is being driven on a down slope, the TCM determines that the vehicle is being driven on a down slope based on the signals and output engine speed from the PCM, and switches the driving mode to the DOWN SLOPE MODE. Due to this, load to the brake is reduced.

Up Slope Mode

• When the vehicle is climbing a slope, the TCM determines that the vehicle is being driven on an up slope based on the signals and output engine speed from the PCM, and switches the driving mode to the UP SLOPE MODE. Due to this, reduction in traction is prevented.