Skoda Workshop Service and Repair Manuals > Octavia Mk1 > Drive unit | 1.9 ltr./50 kW (TDI) Engine, Fuel Injection and Glow Plug System | Fuel preparation system Diesel injection | Repairing a diesel direct injection system

Check throttle valve positioner V60

Check throttle valve positioner -V60-

For vehicles 09.98 ? Intake manifold flap motor -V157-

Special tools and workshop equipment required

t	Vehicle system tester -V.A.G 1552- with cable -V.A.G 1551/3, 3A, 3B oder 3C-

t	Handheld multimeter (e.g. -V.A.G 1526A-)

t	Test box -V.A.G 1598/22- or -V.A.G 1598/31-

Test sequence

–	Connect vehicle system tester -V.A.G 1552- and select engine electronics control unit (address word 01). The engine must be idling for this step → Chapter.

Readout on display:

–	Enter 03 for the function “Actuator diagnosis”.

Vehicle system test               HELP

Select function XX

Readout on display:

–	Confirm entry with key Q.

Vehicle system test                  Q

03 - Actuator diagnosis

–	→ Press the button so often until in the display, appears:

Activating the throttle valve positioner generates differences in the combustion sound (the control motor opens and closes the intake manifold flap).

If no difference in sound can be heard:

–	Enter 06 for the function “End output” and confirm the entry with key Q.

–	Switch off ignition.

Actuator diagnosis                        ->

Throttle valve positioner V60

–	Unplug the 4-pin connector from the intake manifold flap.

–	Switch on ignition.

–	Use handheld multimeter to measure voltage between the contacts 1 and 4 at the 4-pin plug.

Specified value: battery voltage

If the specified value is not reached:

–	Switch off ignition.

–	The following cable connections of contact 1 and 4 must be tested for short circuit to positive or negative and for interruption → Current flow diagrams and Fitting locations.

If the nominal value is measured:

–	Connect test box -V.A.G 1598/22- or -V.A.G 1598/31- at wiring loom to engine control unit → Chapter.

–	Test wiring (contacts 2 and 3) for short circuit to positive or negative and for open circuit according to current flow diagram → Current flow diagrams and Fitting locations.

–	If necessary eliminate wire interruption or short-circuit.

If the lines are not found to be faulty:

–	Replace throttle valve positioner -V60- → Chapter.

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