Audi Workshop Service and Repair Manuals

This signal prevents engine speed fluctuations and load change jolts when the clutch is disengaged and is also required for the cruise control system.

• ‒ Read measured value block (function 08) and selected display group 19 .

• ‒ Check display in display zone 3.

• Specified value: X X X 1 = Clutch pedal not depressed

• ‒ Depress clutch pedal.

• Specified value: X X X 0 = Clutch pedal depressed

Value: X = (no meaning)

If the display is not as described, check the power supply => Page 24-112.

Checking the power supply

• ‒ Unplug the connector from clutch pedal switch.
• ‒ Switch on the ignition.
• ‒ Connect the V.A.G 1527 diode test lamp between contact 1 (positive) on the connector and the engine earth.

• Specified value: The diode test lamp should light up.

If the diode test lamp does not light up:

• ‒ If the diode test lamp does not light up, check the wiring from contact 1 on the connector via the fuse to the fuel pump relay for an open circuit or short circuit.

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

If the specified value is achieved, check the actuation.
.

Check the actuation of the clutch pedal switch

• ‒ → Connect the V.A.G 1598/22 test box to the wiring harness for the engine control unit
  => Page 24-8.
• ‒ Check the wiring from contact 9 on the engine control unit to the connector on the clutch pedal switch contact 2 for an open circuit or short circuit.

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