Volkswagen Golf Service & Repair Manual: Checking 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. |
| – |
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). |
|
|
|
| – |
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-. |
|
|
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| – |
Connect vehicle and fuel pressure sender - G247-
electrically using test instrument adapter/DSO (3-pin) -VAS
5570-. |
|
|
|
| – |
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. |
| → Chapter „Assembly overview - fuel rail with injectors“ |
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Special tools and workshop equipment
required
Assembly tool -T10118-
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–
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–
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Removing and installing fuel pressure sender -G247-