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

Vehicles ä 07.95

• ‒ → Remove 0.3 bar oil pressure switch (brown insulation) and screw into the tester.

Vehicles08.95 ▸

• ‒ Remove 0.25 bar oil pressure switch (blue insulation) and screw into the tester.

Continuation for all vehicles

• ‒ Screw tester into the cylinder head or oil filter bracket in place of the oil pressure switch.
• ‒ Connect brown wire -3- 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
       brown switch:     0.15...0.45 bar
       blue switch:     0.15...0.35 bar
  the LED must go out, otherwise renew oil pressure switch.
• ‒ Connect diode test lamp to 1.8 bar oil pressure switch (white insulation) -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.