fuse AUDI A4 2000 B5 / 1.G AHA Engine Intake Manifold Tuning System Workshop Manual
Page 6 of 11
24-158
Checking voltage supply for intake manifold
tuning valve -N156-
Test requirements
Fuse for for intake manifold tuning valve OK
- Disconnect harness connector from intake manifold tuning valve.
If LED does not light up: - Connect LED test lamp VAG1527 with wires from test kit VAG1594
between terminal 1 (B+) of 2-pin connector and engine Ground.
- Crank starter.
LED must light up.
- Check fuse for -N156-
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Page 7 of 11
24-159
- Check wiring from terminal 1 of 2-pin connector
to fuse per wiring diagram for continuity.
Specified value: max. 1 Ohm
If wiring is OK:
- Check fuel pump relay and signal to relay
page 24
-95
.
Pa
ge 7 of 11 Intake Manifold Tunin
g (IMT
) syste
m
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU03.24.3