Volkswagen Golf Service & Repair Manual: Checking fuel pressure sender -G247-

Volkswagen Golf Service & Repair Manual / 4- cylinder injection engine(1.4 1 direct inction. turbocharger) / Mixture preparation system, electronic inj., Gas / Senders and sensors / Checking fuel pressure sender -G247-

Special tools and workshop equipment required

Vehicle diagnostic tester

Pressure sensor tester -VAS 6394-

Test instrument adapter/DSO (3-pin) -VAS 5570-

Socket, 27 mm (commercially available)

Procedure

The fuel system is under high pressure.Risk of injury due to fuel which may spurt out.Release high pressure.

→ Chapter

Risk of functional impairment due to soiling → Chapter.

–	Remove fuel pressure sender - G247- → Chapter.

Checking fuel pressure sender -G247-

–	Lubricate taper seal of adapter -VAS 6394/3- with clean engine oil and screw into fuel rail (22 Nm).

Checking fuel pressure sender -G247-

–	Unscrew plug -2- and screw fuel pressure sender - G247- into tester -VAS 6394/1-.

–	Connect pressure line -1- of tester to adapter -VAS 6394/3-.

Checking fuel pressure sender -G247-

–	Connect vehicle and fuel pressure sender - G247- electrically using test instrument adapter/DSO (3-pin) -VAS 5570-.

Checking fuel pressure sender -G247-

–	Switch on tester -VAS 6394/1- by pressing button -A- once briefly.

Note

When button -A- is pressed for 2 seconds, the illumination is switched on for 20 seconds.

If tester -VAS 6394/1- does not indicate 0 bar, zero the tester → Operating instructions.

–	Connect vehicle diagnostic tester.

–	Start engine and run at idling speed.

–	Select “Engine electronics” in the self-diagnosis program.

–	Then, select “Measured values”.

–	Select “Fuel pressure” from the list.

–	Compare pressure displayed on tester -VAS 6394/1- with actual value displayed on vehicle diagnostic tester.

–	Watch the fuel pressure on the vehicle diagnostic tester.

A maximum pressure deviation of 5 bar is permissible.

–	If the deviation is greater than 5 bar, renew fuel pressure sender - G247-.

–	Repeat test with new fuel pressure sender - G247- and compare both measured values.

–	If measured values are now the same, install new fuel pressure sender - G247-.

–	If measured values are not the same again, check electrical connection between fuel pressure sender - G247- and engine control unit -J623- → Current flow diagrams, Electrical fault finding and Fitting locations.

Specified torques

→ Chapter „Assembly overview - fuel rail with injectors“

Checking fuel pressure sender -G247-

Removing and installing fuel pressure sender -G247-

Special tools and workshop equipment required Assembly tool -T10118- ...

High-pressure pump

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