Using the vehicle diagnostic tester, pressure sensor tester -VAS 6394- and test instrument adapter -VAS 5570-, this page covers checking the Volkswagen Golf Mk7 fuel pressure sender -G247-.
| Special tools and workshop equipment
required |
| Vehicle diagnostic tester |
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| Pressure sensor tester -VAS 6394- |
| Test instrument adapter/DSO (3-pin) -VAS 5570- |
| Socket, 27 mm (commercially available) |
The fuel system is under high pressure.Risk of injury due to fuel which
may spurt out.Release high pressure.
| Risk of functional impairment due to soiling
→ Chapter. |
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Remove fuel pressure sender - G247-
→ Chapter. |
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Lubricate taper seal of adapter -VAS 6394/3- with clean
engine oil and screw into fuel rail (22 Nm). |
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Unscrew plug -2- and screw fuel
pressure sender - G247- into tester -VAS 6394/1-. |
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Connect pressure line -1- of
tester to adapter -VAS 6394/3-. |
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Connect vehicle and fuel pressure sender - G247-
electrically using test instrument adapter/DSO (3-pin) -VAS
5570-. |
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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. |
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Connect vehicle diagnostic tester. |
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Start engine and run at idling speed. |
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Select “Engine electronics” in the self-diagnosis program. |
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Then, select “Measured values”. |
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Select “Fuel pressure” from the list. |
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Compare pressure displayed on tester -VAS 6394/1- with
actual value displayed on vehicle diagnostic tester. |
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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-. |
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Repeat test with new fuel pressure sender - G247- and
compare both measured values. |
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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. |
| → Chapter „Assembly overview - fuel rail with injectors“ |
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Questions & answers
Checking fuel pressure sender -G247- — Volkswagen Golf Mk7
How do I check the Golf Mk7 1.4 TSI fuel pressure sender -G247-?
Use the vehicle diagnostic tester to read live data. Compare the fuel rail pressure reading with the specification at idle and under load.
Special tools and workshop equipment
required
Assembly tool -T10118-
...
Removing and installing fuel pressure sender -G247-