battery AUDI A8 1998 D2 / 1.G AEB Engine OBD and DTC

VAG 1598/19), or the battery has been
disconnected Page 01
-62
.
Pa
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gnostic
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11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
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01-5
On Board Diagnostic (OBD) technical data

Memory

Temporary memory and permanent memory (If the engine control module is disconnected from the Battery Positive
Voltage (B+) supply, the readiness code and learning values will be erased. Any malfunctions stored in DTC memory are
not erased)
Data output
Rapid data transfer
Additional malfunction indication by Malfunction Indicator Lamp (MIL) lighting up
ECM identification
Page 01
-7 ; VAG 1551 Scan Tool (ST), connecting and selecting "Engine Electronics" address word 01
ECM functions

The Motronic ECM -J220- performs different OBD functions, carried out with the ignition switched on or with the engine
running. Following are the conditions required to carry out each of the specific functions.
Address words:
Address word 00: Automatic Test Sequence r Ignition switched on -or- Engine running at idle
Address word 01: Engine Electronics r Ignition switched on -or- Engine running at idle
Address word 33: OBD II (generic scan tool) r Ignition switched on -or- Engine running at idle
Pa
ge 8 of 57 On Board Dia
gnostic
(OBD
)
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU02.01.1

01-7

VAG 1551/ VAG 1552 Scan Tool (ST),
connecting and selecting "Engine
Electronics" address word 01


Required special tools and test equipment

VAG 1551 Scan Tool (ST) with VAG 1551/3
adapter cable

Note:
VAG 1552 scan tool can be used instead of VAG
1551, however there is no print-out capability.

Requirements
Fuses for engine electronics OK
Battery Positive Voltage (B+) OK (at least 11
volts)
Engine and transmission Ground
connections OK

Electrical Wiring Diagrams, Troubleshooting &
Component Locations

Pa
ge 12 of 57 On Board Dia
gnostic
(OBD
)
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU02.01.1