A/T Controls - A/T Upshifts Too Soon/Too Often
Group:01Number: 05-17
Date: Dec. 20, 2005
Subject:
Update Programming Transmission Control Module (TCM) for Improved Upshifting
Model(s):
Touareg 3.2L V6 (eng. code BMX)
2005 --> 2006
Condition
Customer states transmission seems to upshift too soon or too often.
Service
- Perform Update Programming (Flashing) procedure for TCM as follows:
Note:
When performing the reflash 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 reflash procedure first.
The following "Update - Programming" (flashing) process 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 of America, Inc.
If you encounter a vehicle with a "Tuned" ECM or TCM, prior to performing the "Update - Programming" (flashing) procedure:
^ Your Dealership should place the vehicle owner on notice in writing, that their ECM or TCM was found to have been tuned, and that any damage caused by the tuning of the ECM or 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 flashing, which will automatically wipe out the "Tuning" program, your Dealership should advise the owner of the above and get his written consent (see ECM / TCM Tuning form) to the flashing procedure.
Tool requirements
^ VAS 5051 or 5052 (with Base CD V.08.00.00 and the Brand CD V08.64.01 or higher) with old diagnosis logs erased prior 10 start.
^ "Update - Programming" (flashing) CD W42TOURBMXSHIFI
Note:
Additional copies of the "Update - Programming" CD (Literature Number W42TOURBMXSHIFT) may be ordered from the Volkswagen Technical Literature Ordering Center at the website, or by calling.
Vehicle requirements
^ Battery MUST have minimum no-load charge of 12.5V (failure to maintain voltage during update process can lead to ECM / TCM failure) (you must use an approved battery 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.
^ No Stored DTC's, erase any stored DTCs.
Note:
Non-observance of the following points may lead to ECM / TCM failure! VAS 5051 or 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 flash procedure.Any appliances with high electromagnetic radiation (i.e. mobile phones) must be switched OFF "Update - Programming" (flashing) procedure, checking for update match
- Switch ignition ON.
- Switch VAS 5051/5052 ON and insert flash CD into CD drive as soon as start screen appears.
Note:
You must return to the start screen before starting a new (flashing) session, otherwise the flashing CD will not be recognized by the tester.
- Select "Vehicle Self Diagnosis" mode.
Similar screen appears. Using the scroll bar to the right of the screen:
- Scroll and select vehicle system "02-Gearbox electronics".
Similar screen appears.
- Select "Update - Programming" option at bottom of screen (arrow).
Note:
The "Update - Programming" function is only available when the inserted flashing CD level and current vehicle TCM level are different.
If "Update - Programming" does not appear:
- Programming (flashing TCM cannot be performed, continue to diagnose condition.
If software level DOES NOT match the level indicated on Flashing CD:
^ "Update - Programming" (arrow) appears.
PRIOR to performing procedure to "Update - Programming" (flash) the TCM:
^ ALL fault memories must be interrogated and erased.
Note:
Failure to erase ALL fault memories may cause "Update - Programming" (flashing) procedure to fail!
- Select Diagnosis function 06 "End output".
- Select Diagnosis function 00 "Collection services".
- Select "Check DTC memory - complete system". which will interrogate all fault memories.
- Erase ALL fault memories.
With all fault memories erased:
Similar screen appears. Using the scroll bar to the right of the screen:
- Scroll and select vehicle system "02-Gearbox electronics".
Similar screen appears.
- Select "Update - Programming" option at bottom of screen.
Similar screen appears.
"Update - Programming" (flashing), performing for TCM
After selecting "Update - Programming" function:
- By selecting the ~ button, the 1CM programming procedure begins.
Similar screen appears.
The previous data in the control module is erased and the new data is being transferred to the module from the flash CD.
Note:
Once "Update - Programming" function has been started1 switching ignition OFF or disconnecting the diagnostic connector may completely destroy the TCM.
Tip:
If, during the "Update - Programming"; a fault message is displayed:
- Confirm that VAS 5051 or VAS 5052 diagnostic tool power supply is adequate and that ALL appliances with high electromagnetic radiation (i.e. mobile phones are switched OFF.
- The "Update - Programming" (flashing) process must then be started from the beginning using the "Repeat" button (arrow). DO NOT use the "Cancel" button.
Note:
On NO occasion should the "Cancel" button be selected.
Once "Update - Programming" (flashing) is complete:
^ Similar screen appears.
Tip:
Old software level is still displayed at (arrows). New software level is not displayed until process is complete and fault memories have been erased.
- Print this screen.
- Attach print to vehicle Repair Order.
Once "Update - Programming" (flashing) is complete, the control module must be re-initialized.
- Select the --> button.
^ The tester requests you to switch the ignition OFF.
- Switch ignition OFF.
Note:
^ Wait at least 20 seconds before switching the ignition back ON (failure to wait at least 20 seconds may damage the TCM).
After waiting 20 seconds:
- Switch ignition ON.
After switching ignition ON, the TCM has been re-initialized, however, fault memories must now be erased.
Fault memories, erasing after "Update - Programming" (flashing)
Due to the CAN bus system, fault messages will be stored in various Control Modules during programming.
- To erase ALL fault memories, confirm by selecting the right arrow button.
This will take a few minutes, depending on how many control modules are accessed.
Once fault memories have been erased:
^ Similar screen appears.
^ Old TCM Part No. and software level still appear at (arrow)
^ Function ended appears at bottom of screen.
- Finish update of the TCM by selecting the left arrow button.
- New update version software level will appear at (arrow):
^ Model year 2005: 09D 927 750 BA 0892
^ Model year 2006: 09D 927 750 DS 0893
- Print this screen to verify TCM software level.
- Attach print to vehicle Repair Order.
^ Flash CD can now be removed from VAS 5051 or VAS 5052 Diagnostic tool.
- Select "Go to" then select "Exit".
- Use VAS 5051 or VAS 5052 to set readiness code.