light AUDI A4 1999 B5 / 1.G AWM Engine Lubrication System Components Workshop Manual

17-22

Note:

Unscrew both rear oil pan bolts -1- and -2- with attachment 3249. Turn the
flywheel on vehicles with a manual transmission -3- until the notch -arrow-
is aligned with the bolt.
- Take off oil pan. If necessary loosen it by striking lightly with a rubber
hammer.
- Carefully remove sealant residues from cylinder block (remove baffle
plate).

WARNING!
Wear protective glasses. - Remove remaining sealant from oil pan, e.g. with a rotating plastic
brush.
- Clean sealing surfaces: they must be free of oil and grease.
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17-32

- Connect voltage tester VAG 1527 B to oil
pressure switch and positive side of battery (+)
using test leads from VAG 1594 A.

Test lamp should not light up.

- If test lamp lights up, install new oil pressure
switch.

- Start engine.

Note:
The switching point of the oil pressure switch can
be reached when the engine is cranked on the
starter motor, so watch the tester and the test
lamp while starting the engine.

Black oil pressure switch:
LED must light up at 1.2 to 1.6 bar.

- If test lamp does not light up, install new oil
pressure switch.
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g and installin
g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE06.17.1