SEAT Workshop Service and Repair Manuals

Checking fuel pressure sender -G247-

Check the tool and equipment equivalence table according to the applicability between Seat / VW / Audi / Skoda → Chapter

Special tools and workshop equipment required

t	Extractor -T10118-, see equivalent → Anchor

t	Torque wrench -VAG 1331-, see equivalent → Anchor.

t	Central diagnosis -VAS 5051B- or central diagnosis -VAS 5052-, see equivalent → Anchor

t	Pressure sensor tester -VAS 6394-, see equivalent → Anchor

t	Adapter -VAS 5570-, see equivalent → Anchor

t	Socket wrench insert, double hexagon 1/2" -VAS 5301/7-, see equivalent → Anchor

Procedure: –  Pull off engine cover panel -arrows-.   WARNING The fuel system is pressurised. The fuel pressure in the high-pressure part of the injection system must be reduced to a residual pressure prior to opening; for procedure see → Chapter. –  Remove the fuel pressure sender -G247- → Chapter.

–  Screw in adapter -VAS 6394/2- in place of fuel pressure sender -G247- and tighten adapter with the same torque as that specified for fuel pressure sender -G247-. t  Tightening torque: Fuel rail - Assembly overview 1.8 litre engine (CDHA, CDHB) → Chapter; 2.0 litre engine (CDND) → Chapter

–  Unscrew plug -2- on pressure gauge -VAS 6394/1- and screw removed fuel pressure sender -G247- into opening. Tighten to torque specified for fuel pressure sender.

–  Using the adapter for testing functions -VAS 5570-, establish the electrical connection between the vehicle and the fuel pressure sender -G247-. –  Connect → Vehicle diagnostic, testing and information system VAS 5051. –  Switch on the ignition. –  Select „Engine electronics“ in vehicle self-diagnosis. –  Then select the „measured values“. –  Select the „fuel pressure“ from the list. Display zone 3 shows the actual pressure value being transmitted to the engine control unit by the fuel pressure sender -G247-.

–  Switch on the pressure gauge -VAS 6394/1- by pressing button -A- once briefly.   Note If the -A- button is pressed for 2 seconds, the lighting illuminates for 20 seconds. Pressure gauge -VAS 6394/1- should indicate 0 bar. If this is not the case, press button -C- once briefly to zero the tester.

–  Connect pressure line of pressure gauge -VAS 6394/1- to adapter -VAS 6394/2-. –  Start the engine. –  Compare the pressure indicated by pressure gauge -VAS 6394/1- with the actual pressure value on the → Vehicle diagnostic, testing and information system VAS 5051. l  The pressure difference between each other should not be more than 5 bar. –  If the deviation is more than 5 bar, test a new fuel pressure sender -G247-.   WARNING The fuel system is pressurised. The fuel pressure in the high-pressure part of the injection system must be reduced to a residual pressure prior to opening; for procedure see → Chapter. –  Screw a new fuel pressure sender -G247- into pressure gauge -VAS 6394/1-. –  Repeat the check with the new fuel pressure sender -G247- and compare both measurement values. If the two values still do not agree: –  Check the electrical connection between the fuel pressure sender -G247- and the engine control unit. Refer to → Current flow diagrams, Electrical fault finding and Fitting locations. If the values agree: –  Install the new fuel pressure sender -G247- → Chapter.