VW Golf manuals

Volkswagen Golf Service & Repair Manual: 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-
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...

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