Volkswagen Jetta, Golf, GTI 1999, 2000
2.8 Liter VR6 2V Engine Mechanical, Engine Code(s): AFP Lubrication system components, removing and installing (Page 17-18)
Oil pressure switch, checking
Remove the 1.4 bar oil pressure switch (F1) (black insulation) and screw it into the tester.
Screw the tester into the oil filter housing in place of the oil pressure switch.
Ground the tester brown lead (-).
Connect the V.A.G 1527 B diode test lamp to the battery positive terminal (+) and to the oil pressure switch using the auxiliary cables from V.A.G 1594 A. The light- emitting diode (LED) should not illuminate.
If the LED illuminates:
Replace the 1.4 bar oil pressure switch (F1)
If the LED does not illuminate:
page 17-8 , item -9-.
Let the engine continue to idle. The light-emitting diode should light at 1.2-1.6 bar.
Otherwise, replace the 1.4 bar oil pressure switch (F1).