With VAG Tester 1342

TEST REQUIREMENTS
- Oil level OK.
- Oil pressure warning light lights when ignition turned on.
- Auto-Check system indicates OK.
- Engine oil temperature approx.80°C(176°F) and radiator fan must have switched on at least once.

CHECKING OIL PRESSURE SWITCH AND OIL PRESSURE SENSOR ELECTRICAL FUNCTIONS
1. Disconnect harness connectors from oil pressure switch and oil pressure sensor.





2. Remove oil pressure sensor or oil pressure switch and install into oil pressure tester tool No. VAG 1342, or equivalent.
3. Connect cable -2- (brown) to Ground (GND).
4. Connect cable -1- (blue) to oil pressure switch or oil pressure sensor.
5. Connect voltage tester tool No. VAG 1527B, or equivalent, to cable -1- and battery positive (B+).





6. Start engine and check sensors and switches at the relevant engine speed as shown in the table above.





7. Checking 0-3 bar oil pressure sensor with 0.3 bar oil pressure switch (0-3/0.3 bar sensor) using the table above.





8. Checking 0-5 bar oil pressure sensor (with 0.3 bar oil pressure switch) using the table above.


NOTE: If the cables to the oil pressure sensor a reinstalled incorrectly, the Auto-Check-System will display the engine oil pressure warning symbol (oil can).