diagram AUDI A8 1998 D2 / 1.G AHA Engine Intake Manifold Tuning System Workshop Manual

Wiring diagrams
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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
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24-160

Checking signal for intake manifold tuning
valve -N156-

If LED does not flash or stays on continuously:
If LED does not flash: - Connect LED test lamp VAG1527 with wires from test kit VAG1594
between terminals of 2-pin connector for -N156-.
- Conduct output Diagnostic Test Mode (DTM) for intake manifold tuning
valve -N156- page 01
-51
.
When the intake manifold tuning valve is activated the LED must flash.
- Connect VAG1598/22 test box to ECM harness connector page 01
-
67
.
- Check wiring from terminal 2 of 2-pin connector to terminal 64 of test
box for continuity and short circuit to B+ per wiring diagram.
Pa
ge 8 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
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pair&id=AUDI.B5.FU03.24.3

24-161
If LED stays on continuously:

If wiring is OK: - Check wiring from terminal 2 of 2-pin connector to terminal 64 of test
box for ground per wiring diagram.
- Replace Motronic ECM -J220- page 01
-68
.
- Carry out adaptation of throttle valve control module to ECM page
24
-150
.
- Check readiness code page 01
-70
. If Diagnostic Trouble Code
(DTC) memory has been erased, or ECM was disconnected, generate
new readiness code page 01
-73
.
Pa
ge 9 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