Engine Controls - False DTC P0441 Triggered by ECM
Group: 01Number: 05-08
Date: Nov. 21, 2005
Subject:
Update Programming (Flashing) Eng. Control Module (ECM) to Correct EVAP Purge Valve DTC P0441
Model(s):
A4 & Cabriolet with 1.8T (Eng. 2003 --> 2004
Code AMB4
Supersedes T.B. Group 01, number 04 - 11, dated Nov. 15, 2004 due to availability of new software version.
Condition
EVAP Purge Valve DTC P0441 (incorrect purge flow) may be triggered by the ECM if coolant temperature is below +25°F (-4°C) when the EVAP Purge Valve -N80- diagnostic check is performed by the ECM.
A new software program has been developed which will not run the diagnostic check of the EVAP Purge Valve -N80-until the coolant temperature reaches approx. 39°F (4°C).
Service
- Connect the VAS 5051 or VAS 5052 diagnostic tool to the vehicle using the 6017 A or B K-Lead adapter.
- Switch ignition ON.
- Select "Vehicle Self Diagnosis" mode.
- Select vehicle system "01 - Engine electronics".
- Check ECM Part No. and software level.
If ECM Part No. is 8E0 909 518 AK with software level 0005 (or above):
Do Not complete this Technical Bulletin.
- Continue to diagnose DTC using Guided Fault Finding.
^ If ECM Part No. is 8E0 909 518 AF with any Software Level, check function of EVAP Purge Valve -N80- as follows:
^ If ECM Part No. is 8E0 909 518 AK with Software Level below 0005 (i.e. 0004) check function of EVAP Purge Valve -N80- as follows:
- Select diagnosis function "04-Basic settings".
- Input measuring value block "70" on keypad.
- Select "Q" to confirm.
- Select "Activate".
If EVAP Purge Valve passes the short trip test (TBV OK-arrow-):
- DO NOT replace EVAP Purge Valve -N80-.
- Go to "Update - Programming" (flashing), prerequisites.
If EVAP Purge Valve -N80- fails the short trip test (TBV Not OK):
- Replace EVAP Purge Valve -N80-.
With EVAP Purge Valve -N80- replaced:
- Go to "Update - Programming" (flashing), prerequisites (see below).
Tip:
The VAS 5051 or VAS 5052 print-outs must be attached to the Repair Order showing the failed short trip test
- Return to VAS 5051 or VAS 5052 Main Menu.
"Update - Programming" (flashing), prerequisites
Tip:
^ 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.
Tip:
^ The following "Update - Programming" (flashing) process may overwrite any "TUNED" ECM programming.
^ A "TUNED" ECM is described as any ECM altered so as to perform outside the normal parameters and specifications approved by Audi of America, Inc.
If you encounter a vehicle with a "Tuned" ECM, prior to performing the "Update - Programming" (flashing) procedure:
Your Dealership should place the vehicle owner on notice in writing, that their ECM was found to have been tuned, and that any damage caused by the tuning of the ECM (including any adverse emissions consequences) will not be covered by Audi 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 Owner's written consent (see Control Module Tuning form) to the flashing procedure.
Tool requirements
^ VAS 5051/5052 diagnostic tool (with Basis CD V.07.01 and Brand CD V.07.41 or higher) with old diagnosis logs erased prior to start.
^ VAS 6017 A or B K - Lead adapter (see tip under Vehicle requirements).
^ "Update - Programming" CD Part No: 4F0 906 961 M.
Tip:
Additional copies of the "Update - Programming" CD (Literature Number 4F0 906 961 M) may be ordered from the Audi Technical Literature Ordering Center at the website or by calling from 8:00 a.m. to 8:00 p.m. EST Monday through Friday This number can be dialed in both the United States and Canada.
Vehicle requirements
^ Battery MUST have minimum no-load charge of 12.5V (failure to maintain voltage during update process can lead to ECM failure) (it is advised to 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.
^ Vehicle electrical consumers are OFF (i.e. radio, lights, A/C, etc.).
Tip:
Non-observance of the following points may lead to ECM 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.
^ Do Not use the VAS 601 7A or B adapter when performing update programming (flashing). Control module can be damaged. adapter is for checking control modules only.
"Update - Programming" (flashing) procedure, checking for update match
- Switch ignition ON.
- Switch VAS 5051 or VAS 5052 diagnostic tool ON and insert flash CD into CD drive as soon as start screen appears.
Tip:
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.
- Select vehicle system "01 - Engine electronics".
^ Program checks software level.
If software level of ECM MATCHES level included in Flashing CD:
^ "Update Programming" will not appear (use scroll bar at right as necessary to view).
Tip:
The "Update - Programming" function is only available when the inserted flashing CD level is newer than current vehicle ECM level.
If "Update - Programming" does not appear:
- Programming (flashing) ECM cannot be performed, continue to diagnose condition.
If ECM software level is older than the level indicated on Flashing CD:
^ "Update - Programming" appears.
- Select Diagnosis function "06 - End output".
- Disconnect the VAS 5051 or VAS 5052 diagnostic tool.
PRIOR to performing procedure to "Update - Programming" (flash) the ECM:
- Switch ignition ON.
- Select "Vehicle Self Diagnosis" mode.
- Select Diagnosis function "00 - Collection services".
Select "Check DTC memory - complete system". which will interrogate all fault memories.
^ When DTC interrogation is complete "Function Complete" will be displayed.
Tip:
^ 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.
- Select Diagnosis function "06 - End output".
- Disconnect the VAS 5051 or VAS 5052 diagnostic tool (remove 6017 A or B K-Lead adapter).
- Connect the VAS 5051 or VAS 5052 to the vehicle (without 6017 A or B K-Lead adapter).
- Switch ignition ON.
- Select "Vehicle Self Diagnosis" mode.
- Select vehicle system "01 -Engine electronics".
"Update - Programming" (flashing), performing
- Select "Update - Programming" option at bottom of screen (arrow).
After selecting "Update - Programming" function, new program version as listed below will install:
^ 0006 for ECM Part No: 8E0 909 518 AK (AMB engine).
^ Approximate timing for update is shown on the VAS 5051 or VAS 5052 screen.
- By selecting the --> button, the programming procedure begins.
Note:
Once "Update - Programming" function has been started, switching ignition OFF or disconnecting the diagnostic connector may damage the ECM.
Similar screen appears:
The previous data in the ECM is erased and the new data is being transferred to the module from the flash CD.
Tip:
Please do not carry out any other work on the vehicle during "Update - Programming" (Process could be interrupted).
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.
Tip:
Depending on Basis CD installed in Diagnostic tool, ignition key cycling (illustration 0 1-A140) may display before software level display screen (illustration 01-A144).
Once "Update - Programming" (flashing) is complete:
^ Similar screen appears.
^ ECM Part Number and old software level may still be displayed at (arrows).
DI Tip:
New software level may not be displayed until process is complete and fault memories have been erased.
- Select the "Print", then "Screen" button.
- Attach print to vehicle Repair Order.
- Select forward arrow ~ on navigation bar.
Once "Update - Programming" (flashing) is complete, the control module must be re-initialized.
^ The tester requests you to switch the ignition OFF.
- Switch ignition OFF.
- Disconnect VAS 5051 or VAS 5052.
- Connect VAS 6017A or B K-Lead adapter to the VAS 5051 or VAS 5052 and then to vehicle.
^ The tester requests you to switch the ignition ON.
- Wait 20 seconds and switch ignition ON.
After switching ignition ON, the ECM has been re-initialized, however, fault memories must now be erased.
Fault memories, erasing after "Update - Programming" (flashing)
- Select the "Continue button".
Due to the CAN bus system, fault messages will be stored in various Control Modules during programming.
To erase ALL fault memories:
- Select forward arrow on navigation bar.
Once fault memories have been erased:
^ Similar screen appears.
^ Old ECM Part No. and software level may still appear at (arrow)
^ Function ended appears at bottom of screen.
Finish update of the ECM:
- Select backward arrow on navigation bar.
^ Similar screen appears.
^ Updated ECM Part No: 8E0 909 518AK with software level "0006" will appear at (arrow).
^ Flash CD can now be removed from VAS 5051 or VAS 5051 Diagnostic tool.
- Print the ECM screen to verify ECM update software level.
- Attach print to vehicle Repair Order.
- Select "Go to" then select "Exit".
Tip:
It is not generally necessary to encode the ECM following the "update - Programming" (flashing procedure. However, you must set the readiness code.
- Set readiness code.
Use VAS 5051 or VAS 5052 to set readiness code.
When procedure applies to vehicles within the New Vehicle Limited Warranty use the table.