AUDI A8 1995 D2 / 1.G AHA Engine On Board Diagnostic User Guide

With Mode 7 all malfunctions can be checked, even if they have not switched on the Malfunction Indicator Lamp (MIL) (if
the MIL has not been switched on, there is no malfunction recognized under Mode 3)
Pa
ge 11 of 97 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.FU03.01.1

01-8

VAG1551/VAG1552 Scan Tool (ST),
connecting and selecting "Engine
Electronics" address word 01


WARNING!

When driving or riding in an airbag-equipped
vehicle, NEVER hold the scan tool or other
test equipment in your hands or lap while in
motion. Objects between you and the airbag
increase the risk of injury in an accident.
During a test drive in an airbag-equipped
vehicle, test equipment must always be
fastened to and operated from the rear seat
by a second technician.

Required special tools and test equipment
VAG1551 Scan Tool (ST) with VAG1551/3
adapter cable

Note:
VAG1552 can also be used, but there is no print-
out capability.

Requirements
Fuses for engine electronics OK
Pa
ge 12 of 97 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.FU03.01.1

Battery Positive Voltage (B+) OK (at least 11
volts)
Engine and transmission GND connections
OK Electrical Wiring Diagrams,
Troubleshooting & Component Locations
binder

Fuel pump relay OK
Pa
ge 13 of 97 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.FU03.01.1

01-9

Connecting

Notes:
Scan tool operating instructions - Locate Data Link Connector (DLC), under driver's knee bar to left of
steering wheel.
- Connect VAG1551 Scan Tool (ST) with VAG1551/3 adapter cable to
DLC.
- Switch ignition on, or start engine, depending on function to be
selected ( page 01
-5 ).
If scan tool displays do not appear as indicated:If "Error in communication link" is displayed, disconnect adapter cable
at scan tool, reconnect, and repeat procedure.
- Operate scan tool and advance through program sequence by
following display:
- Press button -1- to select "Rapid data transfer" operating mode 01.
- Press buttons -0- and -1- to insert "Engine Electronics" address word
01, and press -Q- button to confirm input.
Pa
ge 14 of 97 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.FU03.01.1

01-10

4D0907551A 2.8L V6/5V MOTR HS D01 Coding 06051
WSC 00000

Indicated on display (ECM identification and coding, example)
4D0 _ _
_ Engine Control Module (ECM) Part No.
2.8 L Engine displacement
V6/5V Engine type:
V-engine, 6-cylinder, 5-valve
MOTR Motronic
HS
AT Manual transmission
Automatic transmission
D.. ECM software version
Coding ECM coding
Coding variations page 01
-14

WSC
12345 Plant number: indicates where VAG1551 scan tool was used
for last coding and/or adaptation (as long as factory coding
has not been changed, WSC 00000 is displayed)
Pa
ge 15 of 97 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.FU03.01.1

01-11

Notes:
If the ECM version that corresponds to the
vehicle is not displayed, replace ECM page
01
-68
. Incorrect ECM coding leads to:

Performance problems (e.g. jerky shifting,
abrupt load changes, etc.)
Increased fuel consumption
Elevated exhaust gas values
Reduction in transmission service life
Storage of non-existent malfunctions in DTC
memory
Necessary functions not being carried out
(oxygen sensor control, actuation of EVAP
canister system, etc.)

-
Press button to advance through program
sequence.
Rapid data transfer
HELP
Select function XX

Indicated on display
- Continue as specified in procedures for specific OBD functions.
Pa
ge 16 of 97 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.FU03.01.1

01-12

Code Control Module (scan tool function
07)

If vehicle coding information is not as specified,
or if the ECM has been replaced, the ECM must
be coded as follows.

Required special tools and test equipment
VAG1551 Scan Tool (ST) with VAG1551/3
adapter cable

Coding procedure

- Connect VAG1551/VAG1552 Scan Tool (ST)
and press buttons -0- and -1- to insert "Engine
Electronics" address word 01 (ignition switched
on) page 01
-8 .
Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -7- to select "Code Control Module" function 07,
and press -Q- button to confirm input.
Code Control Module
HELP
Input code number XXXXX
(0-32000
)

Indicated on display
- Input applicable code number for vehicle, and press -Q- button to
confirm input. ECM coding variations page 01
-14
.
Function is unknown or

If indicated on display:
Pa
ge 17 of 97 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.FU03.01.1

cannot be carried out at the moment
Incorrect code number has been entered.
Pa
ge 18 of 97 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.FU03.01.1

01-13

4D0907551A 2.8L V6/5V MOTR HS D01 Coding 06051
WSC 00000

Indicated on display (ECM identification and coding, e.g. 06051)
-
Press button to advance through program sequence.
Rapid data transfer
HELP
Select function XX

Indicated on display
Notes:
The Motronic ECM -J220- only uses the code that has been entered after
the ignition has been switched off once. Incorrect coding leads to: - Press buttons -0- and -6- to select "End Output" function 06, and press
-Q- button to confirm input.
Performance problems (e.g. jerky shifting, abrupt load changes, etc.)Increased fuel consumptionElevated exhaust gas valuesStorage of non-existent malfunctions in DTC memoryReduction in transmission service life
Pa
ge 19 of 97 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.FU03.01.1

01-14
ECM coding variations

Country/Emissions
Drivetrain/Options
Transmission
Vehicle type
00
= ------------------ 0
= Front-wheel-drive without
traction control (ASR) 0
= 5-speed manual 0
= ------------
------
01
= ------------------ 1
= Front-wheel-drive with traction
control (ASR) 1
= ------------------ 1
= A4
02
= ------------------ 2
= All-wheel-drive without traction
control (ASR) 2
= ------------------ 2
= ------------
------
03
= ------------------ 3
= All-wheel-drive with traction
control (ASR) 3
= ------------------ 3
= ------------
------
04
= ------------------ 4
= ------------------ 4
= ------------------ 4
= ------------
------
05
= ------------------ 5
= ------------------ 5
= Automatic trans.
01V 5
= ------------
------
06
= USA, equipped with EVAP system Leak
Detection Pump (LDP) 6
= ------------------ 6
= ------------------ 6
= ------------
------
Pa
ge 20 of 97 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.FU03.01.1