| General notes on dynamic steering |
| In conventional steering systems there is a direct mechanical connection between the steering wheel and the steering gear. This establishes a fixed ratio between the steering wheel lock angle and the turn angle of the steered wheels. In this design, only one transmission ratio can be implemented on a vehicle at a time. Selecting the appropriate transmission ratio always represents a compromise in meeting the different - and sometimes conflicting - requirements. |
| The key requirements can only be optimally met by a variable transmission ratio. A transmission ratio of this kind varies the actual turn angle of the wheels depending on the vehicle speed and steering angle. The dynamic steering system generally implements two variable transmission ratios, with comfort and performance-oriented characteristics respectively. |
| The variable transmission ratios are implemented by means of an additional electro-mechanical drive of the steering pinion, which is superimposed on the steering input from the driver. In an emergency - that is, if this drive fails - the steering operates just like a conventional steering system. The mechanical connection between the steering wheel and the front axle is not broken. |
| However, there are many other advantages to dynamic steering. In interaction with the ESP and its sensors, the system is also activated when critical driving states are impending. By targeted variation of the front wheel turn angle, the dynamic steering system assists the ESP at the limits of the vehicle's handling. |
| The „adjuster“ on the steering column is permanently installed. The steering column must be renewed if the „adjuster“ is defective. |
| The „valve“ on the power steering pump is permanently installed. The power steering pump must be renewed if the „valve“ is defective. |
| The basic setting for the dynamic steering system must be performed correctly to ensure proper functioning. |
Note | The steering angle sender -G85- must be calibrated using the steering wheel balance -VAS 6458- before the basic setting can be performed. |
| The basic setting must be performed if: |
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| The active steering control unit -J792- is renewed. |
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| The front axle toe setting is changed. |
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| The rear axle toe setting is changed. |
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| The running gear of the vehicle is modified in any way – e.g. conversion from standard running gear to sports running gear. |
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| The steering angle sender -G85- has been calibrated. |
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| The steering column has been renewed. |
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| The steering wheel is not straight when driving in a straight line. |
Note | Before performing the basic setting on the dynamic steering system, check the event memory and rectify any faults. The basic setting for the dynamic steering system must always be performed using the wheel alignment equipment approved by VW/Audi. |
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