PD78: Transaxle Shift Adapt

Display shows readings of -128 to +127 psi. This value is the increase or decrease in transaxle line pressure that PCM is commanding through the transaxle pressure control solenoid during the most recent upshift or downshift. PCM increases or decreases line pressure during shifts to control shift feel. Normal value fluctuates within a range of 20 psi.

A value less than zero psi means PCM was lowering transaxle line pressure during most recent shift to soften the shift. A value greater than zero psi means PCM was raising transaxle line pressure during most recent shift to firm up the shift.