Oil pressure switch, checking

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Fig 1: Identifying V.A.G 1342 Oil Pressure Tester

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove 1.4 bar Oil pressure switch F1 (black insulation) and screw it into tester.
Screw tester into oil filter housing in place of oil pressure switch.
Ground tester brown lead (-).
Connect Voltage tester VAG 1527 B diode test lamp to battery positive terminal (+) and to oil pressure switch using auxiliary cables from Supplemental measuring toolset VAG 1594 A.

LED should not illuminate

If the LED illuminates:

Replace 1.4 bar oil pressure switch F1.

If the LED does not illuminate:

Start engine and let idle.

LED should light at 1.2-1.6 bar.

If the LED does not light:

Replace 1.4 bar oil pressure switch F1.