Volkswagen Workshop Service and Repair Manuals

The clutch pedal switch supplies the control unit with information as to whether the clutch is engaged or disengaged. If the clutch is being operated the injected quantity is momentarily reduced. This prevents engine jerks.

Special tools, workshop equipment, testers, measuring instruments and auxiliary items required

• ◆ Test box V.A.G 1598/18
• ◆ Hand multimeter V.A.G 1526 or multimeter V.A.G 1715
• ◆ Adapter set V.A.G 1594
• ◆ Current flow diagram

Test sequence

• ‒ Connect the fault reader V.A.G 1551 (V.A.G 1552). Then switch ignition on and select engine control unit with the "Address word" 01.
  (Connecting fault reader and selecting engine control unit .)

• ‒ Press keys 0 and 8 for the function "Read measured value block" and confirm entry with Q key.

• ‒ Press keys 0, 0 and 6 for "Display group number 6" and confirm entry with Q key.
• ‒ Observe display in display zone 2.

• ‒ Operate clutch pedal. The left-hand position must change to 1.

If the specifications are not obtained:

• ‒ Press the ⇒key.
• ‒ Press keys 0 and 6 for the "End data transfer" function and confirm input with the Q key.
• ‒ Switch off ignition.
• ‒ Pull connector off clutch pedal switch => Fitting locations overview, Page 23-4 .

• ‒ → Measure resistance at switch contacts.
       Specification
       Clutch not depressed: max. 10 ω
       Clutch depressed: ∞ω

If the specification is not obtained:

• ‒ Replace clutch pedal switch (F36).

If the specifications are obtained:

• ‒ Connect test box .

• ‒ → Check wiring between test box and connector for open circuit according to current flow diagram.
       Contact 1+ socket 33
       Contact 2+ socket 17
       Wire resistance: max. 1.5 ω
• ‒ Additionally check wires for short to one another, to vehicle earth and to battery positive.
       Specification: ∞ω