Drivetrain - Sport Differential Sensor & Software Update
39 S4/S5 with sports differential, sensor/control unit change39 12 09
2027081/2
February 6, 2012.
Supersedes Technical Service Bulletin Group 39 number 11 - 08 dated September 13, 2011 for reasons listed below.
Affected Vehicles
Condition
Additional faults may be stored after replacing any of the following parts: complete rear sports differential, sport differential pressure sensor, or the sport differential temperature sensor. This is due to an incompatibility with the new part and a software update will be necessary.
Technical Background
On all B8 vehicles with a sports differential (SW version: 0004), a software update may be necessary, in addition to all the work described in the repair manual. The software update from version 0004 to 0025 can only be performed if the final drive, the oil pressure, or oil temperature sensor were replaced.
Tip: Performing software updates without part replacement will not be covered by warranty.
Production Solution
Not applicable.
Service
1. After replacement of any of the above listed parts, check the software level of the Rear Final Drive (22 module) for software version. If module is presently at software version 0004 update to 0025 as follows:
2. Complete GFF and then select Powertrain >> All Wheel Drive (Figure 1).
3. Select: 01 OBD Systems >> 22 Sport Differential >> 22 Subsystems Basic Conditions >> J492 Software Update, as shown in Figure 2.
4. Next, follow the update instructions and verify the software updates to 0025.
5. Clear all fault codes and test drive to verify no faults return.
Warranty
Additional Information
All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service manuals for the latest information.