Suspension - Compressor Inoperative/DTC's
43 08 16 2018765/3
December 11, 2008.
Supersedes Technical Service Bulletin Group 43 number 08-13 dated November 3, 2008 for reasons listed below.
Affected Vehicles
43 Self-leveling compressor inoperative
Condition
- The self-leveling system cannot be adjusted any more with the MMI.
- The compressor for the self-leveling system continues to run after switching off the engine and locking the vehicle.
- One of the following DTCs may be stored:
- DTC 0453 (restricted function through excess temperature).
- DTC 1583 (leak in the system recognized).
- DTC 1770 (sender for compressor temperature of self-leveling control G290).
- DTC 1772 (signal cable of pressure sender for self-leveling control G291).
- DTC 2645 (valves for self-leveling control).
- DTC 2646 (plausibility of self-leveling control).
Technical Background
Because of poor performance or failure of the compressor for air suspension, the vehicle position cannot be adjusted. As a safeguard, the control module will lower the vehicle to the lowest position and illuminate the warning light. Drivability is not affected.
Production Solution
N/A
Service
1. Use a direct current supply to check the compressor for the self-leveling system.
2. See the current flow diagram for the locations of the relay and the compressor.
3. Check the relay J403 of the compressor for the self-leveling system.
Figure 1:
Figure 2:
Figure 3:
4. Open the relay and assess the contacts. Compare them with the contacts of Figures 1 to 3.
Is the wear is similar, or are there burn marks in the housing?
If the relay resembles Figures 1 to 3, replace the compressor and relay J403 for the self-leveling system.
Figure 4:
5. Discoloring of the strand is also a clear indication of permanent operation of the compressor (Figure 4).
Replace the compressor and relay J403 for the self-leveling system.
Figure 5:
6. If the contacts resemble those in Figure 5 and the compressor has a working noise similar to a comparable vehicle, replace only the opened relay J403 for the self-leveling system.
Warranty
All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures Manual. Claims are subject to review or audit by Audi 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.