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AV-SCANNER / Service function guides / Steering and suspension
This guide covers a complete, systematic air suspension leak diagnosis for vehicles that sink overnight, starting with how the system works and ending with aftercare and verification. It is written for motorists with mechanical confidence and for working mechanics who need a repeatable service function rather than guesswork. You will learn to isolate the leak by circuit, confirm it with pressure and soap testing, and distinguish a strut or bag failure from valve block, line, compressor, and height sensor faults. Afterward you will be able to document the repair, verify ride height stability over a full overnight sit, and advise the customer on what to expect next.
Guidance is general and covers many makes. Exact procedures and values vary by model, so confirm them in the factory service information for your vehicle.
Download all 12 sections as a branded PDF to use in the workshop.
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