Skoda Workshop Service and Repair Manuals > Fabia Mk1 > Engine | 1.9/47 SDI Engine, Fuel Injection | Fuel preparation system Diesel injection | Testing components

Testing Intake manifold flap motorV157

Testing Intake manifold flap motor -V157-

Special tools and workshop equipment required

t	Vehicle system tester -V.A.G 1552-

t	Diagnostic cable -V.A.G 1551/3-

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

t	Adapter cable set (e.g. -V.A.G 1594 A-)

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

Test conditions

l	Fuse No. 24 OK

l	Diesel direct injection system relay -J322 - O.K., testing → Chapter

l	Battery voltage min. 11 V

Check for proper operation

–	The functional test of the Intake manifold flap motor -V157- occurs in the final control diagnosis → Chapter.

Test control

–	Switch off the ignition.

–	Disconnect the plug from the Intake manifold flap motor -V157-.

–	Switch on the ignition.

–	Measure the voltage supply of the Intake manifold flap motor on contact 4 of the plug and on the vehicle mass, subsequently on contacts 4 and 1 of the plug.

Specified value: approx. battery voltage

If the specified values are not reached:

–	Switch off the ignition.

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

–	Check the following wires for interruption or short-circuit to earth or positive:

4-pin plug on wiring loom, contact	Test box -V.A.G 1598/31-, bush
1	4, 5
2	81
3	75

–	Also test the wires for short-circuits.

If no fault is found:

–	Replace the Diesel direct injection system control unit -J248- → Chapter.

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