Computer/A/T Controls - Harsh 1-2,2-3 Upshift/No DTC's

01 09 14

July 22, 2009

2020922





Vehicle Information

Condition

Update Programming Engine and Transmission Control Module for Intermittent Harsh 1-2, 2-3 Upshift

Customer may experience a harsh shift 1-2, 2-3 during acceleration from a stop, with 60-80% throttle. Under cold engine start up conditions, the problem will appear less frequently than under normal operating temperature.

No DTCs are stored in the TCM/Mechatronics or the ECM for this complaint.

Comfort concern only.

Technical Background

Engine torque lowers after the 1-2, 2-3 up-shift is completed and the engine torque-reduction is the result of turbo charger boost pressure drop.

Production Solution

Software improvement.

Service

Update Programming Procedure

Vehicle requirements

Battery MUST have minimum no-load charge of 12.5V (failure to maintain voltage during update process can lead to ECM failure) (use a Volkswagen approved Midtronics/InCharge 940 (INC-940) tester/charger 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

Tip:

The SVM Process must be completed in its entirety so the database receives the update confirmation response.

A warranty claim may not be reimbursed if there is no confirmation response to support the claim.

For further update instructions and troubleshooting, refer to SVM Technical Bulletin Instance 2014603, in ElsaWeb.





^ Update the Engine Control Module and Transmission Control Module using the SVM action code as listed in the table.

Tip:
The procedure can be found in GFF under Functions / Component Selection, Software Version Management, Adjust Software.





Note

Current Tuned ECM or TCM requirements: If you encounter a vehicle with a "Tuned" ECM or TCM, your dealership must do the following before performing any procedure that updates ECM or TCM programming:

^ Notify the owner that their ECM or TCM was found to have been tuned

^ Notify the owner any damage caused by the tuning of the ECM or TCM (including any adverse emissions consequences) will not be covered by Volkswagen Group of America warranties.

^ Obtain the owner's written consent (see attached Control Module Tuning form) for any requested repair under warranty or outside warranty that requires flashing, which will automatically overwrite the "Tuned" program.

If the vehicle has a tuned ECM or TCM, ensure the Control Module Tuning Form has been filled out.








Warranty





Required Parts and Tools

No Special Parts required.

Additional Information

All part and service references provided in this Technical Bulletin are subject to change and/or removal.
Always check with your Parts Dept. and Repair Manuals for the latest information.