Engine Controls - MIL ON/DTC P0421/P0441 Set
0109-07
Affected Vehicles
Condition
01 09 07 Apr. 13, 2009 2014376 Supersedes T. B. Group 01 number 07-65 dated Oct. 24, 2007 due to New Software Levels and Programming now available using SVM.
Update Programming, MIL ON or Flashing, DTCs P0420 or P0441 Stored in ECM
ECM requires update to enhance the following system strategies:
NOTE:
- DO NOT diagnose or replace components due to misfire faults before performing the update function as explained in this bulletin.
- DO NOT diagnose, repair or replace Catalyst system components before performing the update function as explained in this bulletin.
- DO NOT diagnose, repair or replace Evaporative system components, including the Evaporative system purge valve -N80-, before performing the update function as explained in this bulletin.
Technical Background
1. Improved ECM software resolves concerns related to:
a. Adjustment to OBD catalytic converter diagnostic parameter strategy.
b. Cold start secondary air strategy.
c. EVAP strategy change to prevent system testing below 5 °C (40 °F).
d. Adjustment to diagnostic strategy tolerances for changes to air intake volume over time.
Production Solution
Software concern was identified after production was concluded.
Service
PROCEDURE:
Engine Control Module Update - Programming (Flashing) using Software Version Management (SVM)
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 an 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:
- 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.
- 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 it's 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 using the SVM action code as listed in the table below:
Tip: The procedure can be found in GFF under Functions/ Component Selection, Software Version Management, Adjust Software.
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.
Tip: For vehicle with cold start misfire DTCs P0300-P0304, also add approved fuel additive to fuel tank before returning vehicle to customer. See technical bulletin 2014815. If vehicle returns after software update and consumption of entire fuel tank with fuel additive with cold start misfire DTCs P0300-P0304, select 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 Parts Dept. and Repair Manuals for the latest information.
Tuning Authorizing Form