We are going to
diagnose and repair a fault that affects Audi Q7 models (4L)
manufactured from 2007.
These models are equipped with Adaptive Air Suspension (AAS) self-levelling suspension system.
The diagnostic fault codes recorded in the Level Control Unit (J197) are:
- Code 1781 - Extreme inclination of the vehicle, maximum threshold value exceeded
- Code 1400 - Level control, maximum threshold value exceeded
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SYMPTOMS
The vehicle is unstable and wanders on the road and remains inclined to one side and the reference ride height position cannot be activated and/or adjusted on the menu on the Multi-Media Interface (MMI) screen within the vehicle.
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