Volkswagen Workshop Service and Repair Manuals

Checking function

Functional check , Final control diagnosis

Checking activation

• ● Fault reader V.A.G 1551 connected
• ● Ignition switched off

• ‒ → Pull plug -1- off throttle valve positioner (V60) -2- .
• ‒ Connect diode test lamp V.A.G 1527 with aux. cables from V.A.G 1594 to connector contacts 1 and 2.
• ‒ Bridge contacts 3 and 4 with auxiliary cables from V.A.G 1594.
• ‒ Switch on ignition and again carry out final control diagnosis until the throttle valve positioner is activated -2nd check-.
• ‒ Slightly open throttle valve and close again.
       Both LEDs must light up alternately.

Note:

If the throttle valve is opened too far, separate aux. cables to the contacts 3 + 4, reconnect and repeat check.

• ‒ Carry out final control diagnosis up to end.
• ‒ Switch off ignition and connect plug.
• ‒ Interrogate and erase fault memory
  => Page 01-5 .

If the LEDs do not light up:

• ‒ Carry out electrical check, test steps 8 and 17 => Page 01-20 .

Checking resistance

• ● Ignition switched off.

• ‒ → Pull plug off throttle valve positioner -1-.

• ‒ → Check resistance at contacts of throttle valve positioner as follows with hand multimeter V.A.G 1526 and aux. cables from V.A.G 1594:

If the specifications between contacts 3+4 are not attained:

• ‒ Check idling switch => Page 24-31 .