Volkswagen Workshop Service and Repair Manuals

Note:

Functional check and servicing the optical and acoustic oil pressure warning:

=> Current flow diagrams, Electrical fault finding and Fitting locations

Special tools, testers and auxiliary items

• ◆ Oil pressure tester V.A.G 1342
• ◆ Diode test lamp V.A.G 1527
• ◆ Adapter set V.A.G 1594

• ‒ → Remove 1.8 bar oil pressure switch (white insulation) and screw into the tester.
• ‒ Screw tester into the oil filter bracket in place of the oil pressure switch.
• ‒ Connect brown wire of tester to earth (-).
• ‒ Connect diode test lamp V.A.G 1527 with aux. cables from V.A.G 1594 to battery positive (+) and 0.3 bar oil pressure switch (F22) -A-. LED must light up.
• ‒ Start engine and increase speed slowly.
  At
       0.15...0.45 bar
  the LED must go out, otherwise renew 0.3 bar oil pressure switch.
• ‒ Connect diode test lamp to 1.8 bar oil pressure switch (F1) -B-.
  At
       1.6...2.0 bar
  The LED must light up, otherwise renew oil pressure switch.
• ‒ Increase engine speed further.
  At 2000 rpm and an oil temperature of 80 °C the oil pressure should be at least 2.0 bar.

At higher engine speed the oil pressure must not exceed 7.0 bar. If necessary renew oil pump cover with pressure relief valve.