Audi Workshop Service and Repair Manuals

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Unscrew cover for kick-down switch -arrow-.

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Disconnect 2-pin harness connector from kickdown switch -F8 (item 12), refer to "Accelerator Pedal Linkage (Vehicles With Electronic Throttle
Control), Servicing" under "/Powertrain Management/Fuel Delivery and Air Induction/Throttle Cable/Linkage" See: Powertrain Management/Fuel
Delivery and Air Induction/Throttle Cable/Linkage/Service and Repair 

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Carefully lift safety latch -arrow- and turn stop counter clockwise.

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Remove kick-down switch.

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Connect multimeter to kick-down switch (resistance range)

Specification: infinity Ohm (no continuity)

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Press Kick-Down switch
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Shortly after kick-down point, reading must drop to 0 Ohm.