Checking the indicator light for operation with oil pressure
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2002 Volkswagen Jetta, 2002 Volkswagen GTI, 2001 Volkswagen Jetta, 2001 Volkswagen GTI, and 2000 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
After the ignition is turned on, the oil pressure warning lamp K3 in the instrument panel must light for approx. 3 seconds and then extinguish. The test ends when the engine starts running.