Audi Q7 - Protection Against Mechanical Damage; Service Position; Diagnostics

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Protection against mechanical damage
To protect the mechanism against mechanical damage due to
faulty operation, there are 2 safeguards:
1. Automatic lowering
2. Slipping clutch
If pressure is applied to the display from above and the display
limit switch F330 is initiated, the display is lowered at a steady
speed. If the pressure applied to the display from above exceeds a
defined value, a slipping clutch decouples the drive motor from the
lifting arm in an eort to protect the drive against mechanical
damage.
If the Hall-eect sensor fails but the limit switches are intact, the
display extends and retracts according to a fixed characteristic.
Thecharacteristic is initiated by an 80 % PWM signal.
If one of the limit switches fails, the display also moves to the stop
according to a fixed characteristic (80 % PWM). The motor then
stops if motor operation is not detected for a set period of time
based on the Hall-eect sensor signal.
Service position
The display mechanism has a service position. The display must be
moved into this position to separate it from the mechanism.
Theservice position can be activated using the diagnostic tester.
This ensures the following:
• The display is not placed under stress.
• The connecting plug on the display can be accessed.
Diagnostics
The diagnosis function of the display mechanism and the display
unit button E506 are started using information electronics control
unit 1 J794.
The diagnosis is, therefore, made using address word 5F - Informa-
tion electronics1.
Display mechanism on the AudiQ7
Display unit button
E506
637_073
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