Audi Workshop Service and Repair Manuals

The throttle valve positioner (V60) is an electric motor. When the engine is idling, it actuates the throttle valve via a gear mechanism in order to control the idling speed.

• ‒ Switch on the ignition.
• ‒ Select "Basic setting" (function 04) and Display Group 98 .

When the Q key is pressed, the throttle valve positioner moves to the min. - and max. - stop (visible and audible at the throttle valve control unit).

If the throttle valve positioner does not move:

• ‒ Switch the ignition off.
• ‒ → Unplug the connector from the throttle valve control unit.
• ‒ Connect the V.A.G 1598/22 test box to the wiring harness for the engine control unit
  .

The following wiring should be checked for a short to positive or negative and an open circuit:

• ‒ If necessary, rectify open circuit or short circuit.

=> Current Flow Diagrams, Electrical Fault Finding and Fitting Locations binder

If no wiring fault is detected:

• ‒ Replace the throttle valve control unit (J338).