Idle Learn Procedure (3.1L & 3.4L)

Any time the battery is disconnected, the programmed position of the IAC valve pintle is lost, and replaced with a "default" value. To return the IAC valve pintle to the correct position, perform the following procedure:

NOTE: This procedure, called the "quick-learn" Idle Learn procedure, utilized the capabilities of the Tech 1 "Scan" tool. For the procedure to work properly, the vehicle transaxle must be in Park or Neutral.

Restore battery power and place transaxle in Park or Neutral. Connect Tech 1, "Scan" tool. Select "IAC" System," then select "Idle Learn" in the "Misc. Test" mode.
Proceed with idle learn as directed.

This procedure allows the ECM memory to be updated with the correct pintle position for the vehicle, and provide a stable idle speed.