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Engine Controls - Low Load Engine Shudder/Vibration

0109-08





Affected Vehicles

Condition
01 09 08 Apr. 13, 2009 2019021 Supersedes T. B. Group 01 number 08-35 dated Dec. 3, 2008 to correct service number and labor operation number in Warranty table.

Update Programming, Engine Control Module (ECM) for Low Load Vibrations

NOTE: DO NOT diagnose or replace transmission components before performing the update function as explained in this bulletin.

Technical Background
Updated ECM software that addresses:
- Shudder (vibrations) under Low Load conditions
- Abrupt harshness during rapid throttle response (load slap) in 2nd and 3rd gear

Production Solution
ECM software update completed as of November 29, 2006.

Service

PROCEDURE:

Engine Control Module Update - Programming (Flashing) using Software Version Management (SVM)

Vehicle requirements
Battery MUST have minimum no-load charge of 12.5 V (failure to maintain voltage during update process can lead to ECM failure) (use an Volkswagen approved Midtronics/InCharge 940 (INC-940) tester/charger to maintain battery voltage).
VAS 5051: connected to vehicle and to 110 V 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 ECM 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.
- When using a VAS 5051B or VAS 5052A tester in conjunction with a VAS 5054A wireless transmitter head for a reprogramming procedure, connect a USB cable between the transmitter head and the tester. Failure to do so may lead to errors during the reprogramming procedure.
- Prior to launching VAS-PC application and starting control module update process, confirm tester screen saver and power settings in accordance with Special Tools and Equipment - Service Information Document # VSE-08- 18. Failure to do so may result in the tester entering power save mode during data transfer, and subsequent control module failure.

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 or action is carried out that is not explicitly stated in the Technical Bulletin.
- For further update instructions and troubleshooting, refer to SVM Technical Bulletin Instance 2014603, in ElsaWeb.

NOTE: An Update Programming procedure (flash) may overwrite any "TUNED" ECM or TCM programming. A "TUNED" ECM or TCM is described as any ECM or TCM altered so as to perform outside the normal parameters and specifications approved by Volkswagen Group of America.

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.

WARNING: Radiator Fan(s) may cycle ON high speed during the Update Process! There is a risk that personal injury may result if contact is made with spinning fan blades.
Keep hands and all objects away from Radiator Fan(s) during Update Process!

- Update the Engine Control Module using the SVM Unit code as listed in the table below:





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

Once the SVM process is complete,
- Switch ignition OFF for 30 seconds.
- After a minimum of 30 seconds, switch ignition ON.
- 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.
- Ensure attached Control Module Tuning Form has been filled out and signed by your Customer.

Tip: If the problem still occurs after the update programming is complete, contact technical assistance by selecting the "Technical Assistance" tab in ElsaWeb and follow the instructions to obtain a 6 digit pin.

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.





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