Jetta Sedan L5-2.5L (CBTA) (2009)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
Engine Controls - ECM Update For A/C Efficiency
01 08 29
Oct. 22, 2008
2018902
Vehicle Information
Condition
Update Programming ECM for AC Cooling Efficiency
NOTE:
The condition as described does not compromise operator visibility.
DO NOT diagnose or replace components due to A/C Performance BEFORE performing the update function as explained in this bulletin.
Technical Background
The A/C compressor will shut off too early under very light acceleration. This condition may lead to insufficient cooling efficiency in hot weather
climates.
Production Solution
Software updated as of VIN: 1K_9M048612 for Jetta vehicles, Concern identified after end of production for Rabbit vehicles.
Affected ECM part numbers:
07K 906 055 M, N, P, Q
Service
PROCEDURE:
Engine Control Module Update - Programming (Flashing) using Software Version Management (SVM)
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.
If the vehicle has a tuned ECM or TCM, ensure the Control Module Tuning Form has been filled out.
Vehicle requirements