Oil pressure, Oil Pressure Switch, and 0.3 Bar Oil Pressure Switch, checking
WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 1999 Volkswagen Jetta, 1999 Volkswagen GTI, 1998 Volkswagen Jetta, 1998 Volkswagen GTI, and 1997 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Functional check and servicing the optical (warning light) and acoustic (buzzer) oil pressure warnings:
Remove 0.3 Bar Oil Pressure Switch -F22- -A- (brown insulation) and screw into VAG 1342 tester.
- Screw tester into the oil filter housing in place of 0.3 Bar Oil Pressure Switch -F22-.
- Connect brown wire -3- of tester to Ground (GND).
- Using cables from VAG 1594 adapter kit, connect VAG 1527B voltage tester to Battery Positive Voltage (B+) and to 0.3 Bar Oil Pressure Switch -F22- -A-.
- LED must light
- Start engine and increase engine speed (RPM) slowly.
- At 0.15-0.45 bar, LED must go out
If NOT:
- Replace 0.3 Bar Oil Pressure Switch -F22-.
- Connect VAG 1527B voltage tester to Oil Pressure Switch -F1- (1.4 bar, black insulation) -B-.
- At 1.2-1.6 bar LED must light
If NOT:
- Replace oil pressure switch -F1-.
Check engine oil pressure:
- Increase engine speed (RPM) further.
- At 2000 RPM and oil temperature of 80 C (176 F) the oil pressure should be at least 2.0 bar (29 psi)
- At higher engine speed, oil pressure must not exceed 7.0 bar (102 psi)
- If necessary replace oil pump.