Oil Pressure And Switch, Checking, With A 2 Pin Switch

Special tools and workshop equipment required 

• Oil Pressure Gauge V.A.G 1342
• Test Adapter F/VAS 5051 DSO (2-pin) VAS 5256
• Hand held Multi-Meter V.A.G 1526 D

• The engine oil level is OK
• The engine oil temperature is at least 80°C (176°F) (radiator fan must start up once).

-- Remove the oil pressure switch -F1-. Refer to Oil Pressure Switch -F1-  and install it into the oil pressure gauge.

-- Thread the oil pressure gauge into the oil filter bracket in place of the oil pressure switch.

-- Install the test adapter F/VAS 5051 DSO (2-pin) VAS 5256 to the oil pressure switch.

-- Connect the hand held multi-meter V.A.G 1526 D to the test adapter F/VAS 5051 DSO (2-pin) VAS 5256 and set it for the continuity test.

• The oil pressure switch must be open at less than 1.2 bar.

-- Start the engine and increase the engine speed: The oil pressure switch must close at 1.2 to 1.6 bar. Replace the oil pressure switch if it does not.

-- Increase the engine speed further. At 2000 RPM and an oil temperature of 80°C (176°F), the oil pressure must be between 2.7 and 4.5 bar.

At higher engine speeds the oil pressure must not exceed 7.0 bar

If the specification is not obtained:

-- Check the screen in oil intake pipe. See item 10 in Figure for contamination.

If no malfunction can be found:

-- Replace the oil pump with balance shaft drive. Refer to OIL PUMP WITH BALANCE SHAFT DRIVE .

If the specification is exceeded:

-- Check the oil passages.

-- If necessary, replace the oil filter bracket with pressure relief valve.