PROCEDURE TO LEARN THE 1st 2-3 SHIFT AFTER A RESTART OR SHIFT TO REVERSE:

WARNING: This page is about a different car, the 2004 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.

Use the following steps to have the PCM learn the 1^st 2--3 shift OD CVI.

NOTE: The transmission oil temperature must be above 80°F (27°C).

With the vehicle engine running, select reverse gear for over 2 seconds.
Shift the transmission to Drive and accelerate the vehicle from a stop at a steady 15 degree throttle opening and perform at 2--3 shift while noting the OD CVI. During the shift, a different value may appear on the screen, which is the 1^st 2--3 OD CVI.
Repeat steps 1 and 2 until the 1^st 2--3 upshift becomes smooth and the 1^st 2-3 OD CVI stabilizes.