Volkswagen Workshop Service and Repair Manuals

Special tools, workshop equipment, test and measuring appliances and auxiliary items required

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

Vehicles ▸ 08.97

Engine code ABD, ABU, AEA

Note:

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

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

Test sequence

• ‒ → Remove 0.9 or 1.4 bar oil pressure switch (black or grey insulation) and screw into the tester.
• ‒ Screw tester into the cylinder head in place of the oil pressure switch.
• ‒ Connect brown wire of tester to earth (-).

• ‒ Connect diode test lamp V.A.G 1527 with adapter cables from V.A.G 1594 to battery positive (+) and to 0.25 or 0.3 bar oil pressure switch (F22, blue or brown insulation) -B-. LED must light up.
• ‒ Start engine and slowly raise rpm. At
       0.25 bar switch: 0.15...0.35 bar
       0.3 bar switch: 0.15...0.45 bar
  the LED must go out, otherwise renew oil pressure switch.
• ‒ Connect diode test lamp to 0.9 or 1.4 bar oil pressure switch (F1) -A-. At
       0.9 bar switch: 0.7...1.1 bar
       1.4 bar switch: 1.2...1.6 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.

Engine codes AEE, AEX, APQ:

Test sequence

• ‒ → Remove oil pressure switch (F22) and screw into tester.
• ‒ Screw tester into the cylinder head in place of the oil pressure switch.
• ‒ Connect brown wire of tester to earth (-).
• ‒ Connect diode test lamp V.A.G 1527 using aux. cables from V.A.G 1594 to battery positive (+) and oil pressure switch. LED must light up.
• ‒ Start engine and increase speed slowly.
  At
       0.15...0.35 bar
  the LED must go out, 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.

Vehicles 09.97 ▸

Note:

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

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

• ‒ → Remove 1.4 bar oil pressure switch (F1) (black insulation) and screw into test unit.
• ‒ Screw tester into the cylinder head in place of the oil pressure switch.
• ‒ Connect brown wire of tester to earth (-).
• ‒ Connect diode test lamp V.A.G 1527 B using aux. cables from V.A.G 1594 A to battery positive (+) and oil pressure switch. LED must not light up.
• ‒ If the LED lights up, renew 1.4 bar oil pressure switch (F1) .

If the LED does not light up:

• ‒ Start engine and run at idling speed
  at
       1.2...1.6 bar
  the LED must light up, otherwise renew 1.4 bar oil pressure switch (F1).
• ‒ Increase engine speed further.
  At 2000 rpm and an oil temperature of 80 °C the oil pressure should be at least 2.0 bar.