Audi Workshop Service and Repair Manuals

The sensor for the throttle valve positioner (G127) informs the engine control unit of the position of the throttle valve positioner (V60).

• ‒ Read measured value block, Display Group 98, engine at idling speed =>Page01-58

• ‒ Check display in display zone 2.

• Specification: 0.500...4.900 V

If the specification is not obtained:

• ‒ Switch off ignition.

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

The following wiring connections should be checked for open circuits and/or short to positive or negative.

• ‒ Rectify any open/short circuit as necessary.

If no wiring fault is detected:

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