Transaxle Shift Quality Quick Learn Procedure

The QUICK LEARN function customizes adaptive parameters of the control module to the transmission characteristics of a vehicle. This gives the customer improved "as received" shift quality compared to the initial parameters stored in the control module.

The nature of the QUICK LEARN function requires that certain features must be taken into consideration.

• QUICK LEARN should generally not be used as a repair procedure unless directed by a repair or diagnostic procedure. If the transmission system is exhibiting a problem that you think is caused by an invalid CVI, you should try to relearn the value by performing the appropriate driving maneuvers. In most cases, if QUICK LEARN makes a vehicle shift better, the vehicle will return with the same problem.
• Before performing QUICK LEARN, it is imperative that the vehicle be shifted into OD with the engine running and the oil level set to the correct level. This step will purge air from the clutch circuits to prevent erroneous clutch volume values, which could cause poor initial shift quality.
• If a new control module is installed on a vehicle with a hot engine, QUICK LEARN will cause the control module to report a cold calculated oil temperature. This requires monitoring the calculated oil temperature using the DRBIII®. If the temperature is below 60°F (15°C), the transmission must be run at idle of driven in gear until the temperature goes above 60°F (15°C). If the temperature is above 200°F (93°C), the transmission must cool to below 200°F (93°C).
• First gear is engaged in overdrive after QUICK LEARN is completed. Place the vehicle in Park after performing QUICK LEARN.

The QUICK LEARN function should be performed:

• Upon installation of a new service control module.
• After replacement of rebuild of internal transmission components of the torque converter.
• If one of more of the clutch volumes indexes contain skewed readings because of abnormal conditions.

To perform the QUICK LEARN procedure, the following conditions must be met.

• It is imperative that the vehicle be shifted into OD with the engine running and the oil level set to the correct level. This step will purge the air in the clutch circuits to prevent erroneous clutch volume values, which could cause poor initial shift quality.
• Place the selector lever in Neutral.
• The brakes must be applied.
• The engine must be idling.
• The throttle angle (TP sensor) must be less than 3 degrees.
• The shift lever position must stay in Neutral until prompted to shift into OD.
• The shift lever must stay in OD after the "Shift to Overdrive" prompt until the DRBIII® indicates the procedure is completed.
• The oil temperature must be 60-200°F (15-93°C).

These conditions must be maintained during the procedure to keep the procedure from being aborted.

The QUICK LEARN procedure is performed with the DRBIII® by selecting TRANSMISSION system, then MISCELLANEOUS functions, then QUICK LEARN. Follow the procedure instructions displayed on the DRBIII®.