Automatic Transmission/Transaxle: Application and ID

Transmission Adaptation, MY 2006

• This transmission adaptation is not possible on vehicles prior to MY 2006. The software for the transmission control module (J217) in these vehicles is not able to perform the adaptation.

In addition to the construction, the deciding factor for good and constant shift quality is the precise control of the shifting elements. To maintain a consistent shift quality throughout the entire transmission service live, various control and regulation parameters must be adapted continuously and the determined adaptation values must be stored. These adaptations or this programming process are called adaptation.

The goal of a transmission adaptation is to compensate for production tolerances of the transmission components and their changes throughout the service life. The adaptation values act as corrective values or offsets which are added to or subtracted from the values (applied values) stored permanently in the transmission control module.

When should the adaptation values be read, evaluated or erased and when should an adaptation drive be performed?

• If the customer indicates there is rough or hard shifting behavior.

• After changing the ATF.

• After repairing the clutches.

• After replacing the Mechatronic or transmission.

• After a software update.

• After certain engine repairs such as replacing the mass air flow sensor.

- Follow the instructions, procedures and requirements in guided functions exactly.

- The is connected, select and perform J217 - adaptation values, checking/adaptation drive (Repair Group 38), in guided functions.

• Before erasing the adaptation values, make sure the existing values were evaluated and documented. The existing adaptation values can provide insight about the condition of the individual clutches and be very useful when determining how to proceed. Documenting the adaptation values makes it easy to determine the cause of the concern.

• After erasing the adaptation values, perform an adaptation drive using guided functions or fault finding. If the adaptation drive cannot be performed for various reason, complete an extensive test drive. When on the test drive, make sure the adaptation conditions are maintained as closely as possible and passes the shift quality each time the transmission shifts. If certain shifts are noticeable, the affected shift elements can be targeted for adaptation.

General Adaptation Conditions

Various driving conditions and operating conditions must be maintained depending on the adaptation type and which shift element must be adapted. Adaptation conditions are defined for each adaptation.

The adaptation can only take place when the appropriate defined adaptation conditions are met.

The following information provides an overview of the criteria that must be met during an adaptation:

• The ATF must be within a certain temperature range.

• A certain gear or selector lever position must be engaged.

• The engine load must be within a certain range. Generally a very low engine load or very light pressure on the accelerator pedal is required.

• There must be no DTC entries in the transmission control module.

• Certain vehicle conditions must be present such as acceleration or deceleration, constant driving, vehicle stopped with the engine running at idle, etc.

• There must be good road conditions, optimum road surface, no steep inclines or declines and the road must be as level as possible.