rs4vr

Date: December 20, 2010
To: All Audi Dealers, General Managers, Service Managers, Sales Managers, Parts Managers and Warranty Administrators
From: Audi Product Compliance
Subject: Required Vehicle Update 24T9

Model Year 2007 - 2008 Audi RS4 and RS4 Cabriolet

ECM Software Update for Cold Start


This communication is to inform you of Required Vehicle Update (RVU) 24T9.

What vehicles are affected?

There are 1,208 Model Year 2007 - 2008 Audi vehicles affected in the U.S. by this RVU.

What is the issue?

On certain Audi RS4 and RS4 Cabriolet vehicles manufactured within a specific period it is possible that the engine runs rough (misfires) after cold start.

What does the repair procedure involve?

ECM software update.

When will the Required Vehicle Update technical bulletin be available?

RVU 24T9 will be visible in ElsaWeb and ServiceNet on or about December 21, 2010.



Please refer to the ElsaWeb campaign/action screen for confirmation of whether the update applies to each specific vehicle. Additionally, RVU Technical Bulletin 24T9 is posted on ElsaWeb and ServiceNet for additional information and complete repair instructions.



Consistent with general Audi corporate policy governing Required Vehicle Updates, Audi is not notifying consumers. (RVUs differ from recalls and service actions; consumers are notified in writing of recalls and service actions.) Each vehicle should be completed when it is in to the dealer for maintenance or any other service visit. Dealer stock vehicles cannot, however, be delivered to consumers until the RVU is completed.



To identify any vehicles in your inventory that are affected by this RVU, please run the "New Vehicle Inventory Open Campaign/Action Listing" report from the AIM system.

Please ensure that every affected vehicle gets the update before delivery to consumers. Your effort is integral in reaching the highest quality expectations of Audi customers.


Thank you for your cooperation and assistance in this important matter.

Here are the important tidbits from the TSB:


Technical Service Bulletin
RVU 24T9 - RS 4 ECM update cold start misfire
24 10 58 2025168/1.

Model(s) Year VIN Range Vehicle-Specific Equipment
RS 4 2007 907201 - 999999
RS 4 2008 900000 - 999999
RS 4 Cabrio 2008 800000 - 999999
4.2 FSI


Condition
This RVU has been proactively released to prevent the following condition from occurring in the vehicle:
MIL on.
DTC stored.
Engine runs rough (misfires) after cold start.
The following DTCs are logged in the memory of the ECM: DTC P0300 - P0308 (misfire).
This condition will not cause stalling or drivability concerns.

This Required Vehicle Update (RVU) is in effect until September 12th, 2014. After that date, this RVU will expire and no longer be in effect.
Vehicle must meet all of the following criteria:
Procedure is valid only for vehicles that show the 24T9 code in the ElsaWeb Campaign/Action Information screen on the day of repair.
Vehicle must be within the Federal Emissions Warranty period.
Procedure must be performed within the allotted time frame stated in this Technical Service Bulletin.
Procedure must be performed on applicable vehicles in dealer inventory prior to sale.

Technical Background

Over the last 3 years the capability of fuel available in the United States to evaporate at low temperatures (~32-80°F) has decreased, while still being within the tolerance band of EPA specification.
Initial engine calibration was based on worst case fuel blend at the time.
Some 2007 and 2008 RS4 engines are more sensitive to changes in evaporative behavior of fuel.

Also the variation in Ethanol content (0-10%) influences the engine calibration requirements. In order to adjust to the shift in the evaporative behavior of available fuel, the engine control software was updated.

Service

1. 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:
Note:
Any 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 Audi of America, Inc.
a. Notify the owner that their ECM or TCM was found to have been tuned.
b. Notify the owner that any damage caused by the tuning of the ECM or TCM (including any adverse emissions consequences) will not be covered by Audi of America, Inc. warranties.
c. Obtain the owner's written consent (see attached Control Module Tuning form) for any requested repair - under warranty or outside warranty - that requires flashing that will automatically overwrite the tuned program.

India Whiskey Charlie

Thanks for posting this. My RS4's VIN is below 907201 and has no cold start problems or symptoms.