A/T Controls - Harsh 3-2 Downshift/Clunk Heard

Condition





01 07 18 Jan. 29, 2007, 2010496, Supersedes Technical Bulletin Group 01 number 05-14 dated September 21, 2005 due to inclusion into ElsaWeb and updated content.

Update Programming (Flashing) Transmission Control Module (TCM) for Harsh Shifting

Technical Background
Updated TCM software that addresses:
- When slowing to a stop, a harsh 3rd gear to 2nd gear downshift is felt.
- After slowing to a near stop then accelerating again, a clunk is felt.

Production Solution
Not Applicable.

Service

PROCEDURE:

Transmission Control Module Update - Programming (Flashing)

Tip:
When performing the update programming procedure, ALL DTCs for all systems are erased. DTCs linked to Guided Fault Finding function tests will be lost. Therefore, always address stored DTCs for Customer concerns unrelated to the update programming procedure first.
The following "Update - Programming" (flashing) process may overwrite any "TUNED" TCM programming. A "TUNED" TCM is described as any TCM altered so as to perform outside the normal parameters and specifications approved by Volkswagen of America, Inc.

If you encounter a vehicle with a "Tuned" TCM, prior to performing the "Update - Programming" (flashing) procedure:

Your Dealership should place the vehicle owner on notice in writing, that their TCM was found to have been tuned, and that any damage caused by the tuning of the TCM (including any adverse emissions consequences) will not be covered by Volkswagen of America, Inc. warranties.

For any repair requested by the owner under warranty or outside warranty that requires update programming, which will automatically wipe out the "Tuning" program, your Dealership should advise the owner of the above and get Owner's written consent (see attached Control Module Tuning form) to the update programming procedure.

Tool requirements
VAS 5051 or VAS 5052 (with Base CD V.10.01 and the Brand CD V.10.70.00 or higher).
"Update - Programming" (flashing) CD W42PASSATSHIFT.

Tip: Additional copies of the "Update - Programming" CD (Literature Number W42PASSATSHIFT) may be ordered from the Volkswagen Technical Literature Ordering Center.

Vehicle requirements
Battery MUST have minimum no-load charge of 12.5V (failure to maintain voltage during update process can lead to TCM failure) (use an approved battery charger INC-940 to maintain battery voltage).

VAS 5051: connected to vehicle and to 110V AC Power supply at all times during procedure.

VAS 5052: connected to vehicle with battery voltage requirements met.

Any appliances with high electromagnetic radiation (i.e. mobile phones) switched OFF.

When performing the update programming procedure, ALL DTCs for all systems are erased.

DTCs linked to Guided Fault Finding function tests will be lost. Therefore, always address stored DTCs for Customer concerns unrelated to the update programming procedure first.

NOTE:
Non-observance of the following points may lead to TCM failure! VAS 5051 or VAS 5052 must always be connected to the approved power supply at the approved voltages. Under no circumstances should the power supply be interrupted or the diagnostic connector unplugged during the update programming procedure. Any appliances with high electromagnetic radiation (i.e. mobile phones) must be switched OFF.

Tip: Before update programming, delete the fault memory in the TCM. Update programming is not possible when an EEPROM fault is active.

Reprogram ECM with CD - Part number W42PASSATSHIFT.

Insert the programming CD into the VAS 5051 / 5052, and access the TCM.

Tip: If the update programming button does not appear, the latest version has already been installed to the level below.

- Programming starts by pressing the "Update Programming" button and following the on screen prompts.

NOTE:
Once update programming begins, on NO occasion should the Cancel button be selected.

- Press the "Update Programming" button.

Tip: Once update programming is complete, it is recommended to use 1001- Compiling Services prompt to clear faults stored in various control modules.





Reset readiness code.





Warranty

Required Parts and Tools





No Special Tools required.