Pic. 4.39. Components of the clearance control system and their installation locations:
1 - compressor with a block of magnetic valves; 2 - right rear elastic pneumatic element; 3 - rear right body level sensor; 4 - control unit of the clearance control system; 5 - rear body acceleration sensor; 6 - rear left body level sensor; 7 - rear pneumatic accumulator; 8 - elastic pneumatic element rear left; 9 - front pneumatic accumulator; 10 - front left body level sensor; 11 - front left wheel acceleration sensor; 12 - elastic pneumatic element front left; 13 - front left body acceleration sensor; 14 - front right body acceleration sensor; 15 - front right wheel acceleration sensor; 16 - elastic pneumatic element front right; 17 - front right body level sensor.
NOTE: During the 2004 model year, the control unit for the height control system 7L6 907 553 A / B (200 Hz) has been replaced by the control unit for ride height control 7L0 907 553 F/* (800 Hz).
As a result of the use of new control units, the need for wheel acceleration sensors was eliminated, and body level sensors were adapted.
If instead of the control unit (200 Hz) block is installed (800 Hz), then the body level sensors must also be replaced. The wheel acceleration sensors remain on the vehicle for «sealing» pipeline.
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