display AUDI A8 1998 D2 / 1.G ATQ Engine Check DTC Memory And Erase DTC Memory Workshop Manual

01-15


Check DTC Memory (function
02) and Erase DTC Memory
(function 05)

- Connect VAS5051 tester or VAG1551 scan tool
and select the control module for engine
electronics using "address word" 01 Page 01
-
9 .

Engine must run at idle for this.

Note:
If engine doesn't start, crank engine using starter
for at least 5 seconds. Do not switch ignition off
afterward under any circumstance. Rapid data transfer
HELP
Select function XX

When indicated on display:
- Press buttons -0- and -2- to select "Check DTC memory" and press -Q-
button to confirm input.
No DTC reco
gnized

When indicated on display:
or -
Press button.
X DTC reco
gnized

When indicated on display:
Pa
ge 1 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
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01-16

- Find printed DTCs in DTC table and repair
Page 01
-18
.

Important note:

If there are no DTCs in DTC memory, DTC
memory should not be unnecessarily erased or
else readiness code will be lost.
If DTC memory was erased, readiness code
must be re-generated Page 01
-82
.

-
Press button.Rapid data transfer
HELP
Select function XX

When indicated on display:
Note: - Press buttons -0- and -5- to select "Erase DTC memory" and press -Q-
button to confirm input.
Attention!DTC Memor
y was not interro
gated

When indicated on display:
Procedure was not followed exactly.
- Check DTC memory.
DTC memory will not be erased under the following conditions:
Ignition switched off after DTC memory was checked.
Pa
ge 3 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
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01-17

Rapid data transfer DTC Memor
y is erased

When indicated on display:
Note:
This causes DTCs to be erased that were stored during repair of
malfunction, e.g. because harness connectors were disconnected.
End Output -
Press button.- Check DTC memory again after repair work and erase it if necessary.
- If DTC memory was erased, readiness code must be re-generated
Page 01
-82
.
Rapid data transfer
HELP
Select function XX

When indicated on display:
- Press buttons -0- and -6- to select "End output" and press -Q- button to
confirm input.
Rapid data transfer
HELP
Insert address word XX

When indicated on display:
- Switch off ignition and disconnect diagnostic cable.
Pa
ge 5 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
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e=re
pair&id=AUDI.B5.FU05.01.2

01-18
Diagnostic Trouble Code (DTC) table

Notes:

When malfunctions occur in monitored sensors or components, Diagnostic Trouble Codes (DTCs) are stored in DTC
memory with a description of the malfunction type.
"E-Gas"-relevant malfunctions are also indicated in the instrument cluster by the warning lamp for Electronic Power
Control ("EPC warning lamp"); Notes for E-gas system Page 24
-134
.
Malfunctions that worsen emissions are also indicated by an exhaust warning lamp (MIL for output DTM) that is also
located in the instrument cluster. There are malfunctions that cause the exhaust warning lamp to light up immediately after
recognition. Malfunctions can also occur that do not cause the exhaust MIL to light up immediately, but only if malfunction
is recognized again after repeated engine starts.
The DTC table is organized by the 5 digit code at left.
If a stored DTC does not recur within the next 40 warm-up cycles, the DTC will be erased automatically.
Malfunctions that occur only sporadically (temporary malfunctions) are are identified by the letters "SP" (sporadic
malfunction) on the VAG1551 scan tool display. The word sporadic means "appearing or occurring at irregular intervals,
occasional".
Do not immediately replace components that the VAG1551/VAS5051 suggests are faulty, instead: Check wire
connections and harness connectors to these components according to wiring diagram. Also check Ground (GND)
connections according to wiring diagram. This is particularly valid when malfunctions are displayed as "sporadically
occurring" (SP).
Pa
ge 6 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2