instrument cluster AUDI A8 1998 D2 / 1.G ATQ Engine Motronic On Board Diagnostic Workshop Manual
Page 2 of 19
01-2
If the ECM recognizes malfunctions that lead to
a degradation of emissions values, it indicates
them by lighting the Malfunction Indicator Lamp
(exhaust warning lamp -K83-). Clarification of
this lamp Page 01
-3 .
"E-Gas"-relevant malfunctions are also
indicated in the instrument cluster by the
warning lamp for Electronic Power Control
("EPC warning lamp").
Pa
ge 2 of 19 Motronic, On Board Dia
gnostic
(OBD
)
11/23/2002 htt
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Page 5 of 19
01-5
Function test of warning lamp
- Switch ignition on.
Warning lamp for On Board Diagnostic
(Malfunction Indicator Lamp -MIL-) must
light up
A - Warning lamp for On Board Diagnostic
(Malfunction Indicator Lamp -MIL-) does not
light up
- Connect VAG1598/31 test box at wiring harness
to ECM, do not connect ECM Page 24
-17
.
- Bridge sockets 1 and 47 of test box.
- Switch ignition on.
Warning lamp must light up.
If warning lamp does not light up:
- Switch ignition off.
- Remove instrument cluster:
Pa
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gnostic
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)
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play?action=Goto&t
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e=re
pair&id=AUDI.B5.FU05.01.1
Page 6 of 19
Repair Manual, Electrical Equipment, Repair
Group 90, Instrument cluster, removing and installing
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gnostic
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)
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yp
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pair&id=AUDI.B5.FU05.01.1
Page 7 of 19
01-6
- Check the following wire connection for open
circuit and short circuit to B+:
Test box
VAG1598/31
Socket
Instrument cluster
Terminal
47 Electrical Wiring Diagrams,
Troubleshooting & Component
Locations binder
- Repair open circuit or short circuit if
necessary.
If wire connection is OK:
- Replace Engine Control Module (ECM) Page
24
-21
.
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gnostic
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)
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yp
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Page 8 of 19
01-7
B - Warning lamp for On Board Diagnostic
(Malfunction Indicator Lamp -MIL-) remains lit
constantly
- Check DTC memory of Engine Control Module
(ECM) Page 01
-15
.
If no DTCs are stored:
- Connect VAG1598/31 test box at wiring harness
to ECM, do not connect ECM Page 24
-17
.
- Remove instrument cluster:
Repair Manual, Electrical Equipment, Repair
Group 90, Instrument cluster, removing and installing
- Check the following wire connection for short
circuit to Ground (GND):
Test box
VAG1598/31
Socket
Instrument cluster
Terminal
47 Electrical Wiring Diagrams,
Pa
ge 8 of 19 Motronic, On Board Dia
gnostic
(OBD
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.1