For 1990-2009 cars

1. The transmission control module (TCM) must be programmed with the proper software/calibrations. Ensure that the following conditions exist in order to prepare for TCM programming:

• | The battery is fully charged.

• | The ignition switch is in the RUN position.

• | The Techline equipment cable connection at the data link connector (DLC) is secure.

2. Program the TCM using the latest software matching the vehicle. Refer to up-to-date Techline equipment user instructions.
3. If the TCM fails to program, proceed as follows:

• | Ensure that the TCM connection is OK.

• | Inspect the Techline equipment for the latest software version.

• | Attempt to program the TCM. If the TCM still cannot be programmed properly, replace the TCM.