auxiliary battery AUDI A4 1999 B5 / 1.G AHA ATQ Engines Lubrication System Components Checking Manual

17-30


Lubrication system
components, checking

Oil pressure and oil pressure switch,
checking


Note:
For the functional check and servicing of the
optical and acoustic oil pressure warning
"Electrical Wiring Diagrams, Troubleshooting
&Component Locations".

Test sequence

- Remove oil pressure switch -F1- and install in tester.
- Install tester into oil pan in place of oil pressure switch.
- Connect brown wire of tester to Ground (GND).
- Using auxiliary cables from VW1594, connect VAG1527B voltage
tester to oil pressure switch and Battery (+).
- Start engine and slowly increase engine speed (RPM).
At 1.2-1.6 bar pressure LED must light up.
- If not, replace oil pressure switch.
- Increase engine speed (RPM) further.
-
At 2000 rpm and an oil temperature of 80 C, oil pressure must be at
least 2.0 bar.
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