SHIFT CONTROL OPERATION [GF4AX-EL]

BUE051721101N16

Range Determination

• The interior switches of the TR switch turn on/off according to selector lever operation and these signals are used to detect lever position.

• The following switches are built into the TR switch and the corresponding range is determined by their on/off status.

- P and N position switch

- R position switch

- D range switch

- 2 range switch

- 1 range switch

Driving Mode Determination

D range

• "Normal" or "O/D off" modes are determined based on the combination of the O/D OFF switch position and the ATF temperature.

• When the ATF temperature is high, the PCM switches automatically to dedicated high fluid temperature mode and the TCC point is shifted towards the low speed side.

• If the PCM determines, from engine load and acceleration rate, that the vehicle is driving on a slope, then dedicated slope mode is selected.

2 Range

• Fixed in 2GR.

1 Range

• Fixed in 1GR.

O/D Driving Inhibited Determination

• O/D driving is inhibited according to engine load conditions to provide stable driving characteristics.

• O/D driving is inhibited when the ATF temperature is low.

Shift Learning Control

• Shift learning control is performed to minimize shift shock and other negative characteristics due to deviation of parts and deterioration over time. Shift shock may increase after the negative battery cable is removed since this clears the learning data but the shock will gradually be reduced as the vehicle is driven.