AUDI A6 1995 C5 / 2.G AEB Engine OBD and DTC

Mode 5 shows the statistical value of the oxygen sensors as mandated by law. As these values have no direct bearing on
oxygen sensor diagnosis, Mode 5 is of no particular value in an Audi Service department.
Under Mode 6, values can be checked for components and systems that are not continuously monitored.
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)
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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

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Fuel pump relay OK
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01-8

Connecting

Notes:
Scan tool operating instructions - Locate Data Link Connector (DLC), under driver's knee bar to left side
of steering wheel.
- Connect VAG 1551 Scan Tool (ST) with VAG 1551/3 adapter cable to
DLC.
- Switch ignition on, or start engine, depending on function to be
selected.
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.
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01-9

8D0907557 1,8L R4/5VT MOTR HS D02 Coding 06051
WSC 00000

Indicated on display (ECM identification and coding)
8D0 _ _ _
_ _ _ _ Engine Control Module (ECM) Part No.
1.8 L Engine displacement
R4 / 5VT Engine type:
In-line (Reihenmotor), 4-Cyl.
5- Valve, Turbocharged
MOTR Motronic
HS
AT Manual transmission
Automatic transmission
D.. ECM software version
Coding ECM coding:
See coding table page WSC
12345 Plant number: indicates where the VAG 1551 scan tool was
used for the last coding and/or adaptation (as long as factory
coding has not been changed, WSC 00000 is displayed)
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01-10

Notes:
If the ECM version that corresponds to the
vehicle is not displayed, replace ECM Page
01
-57
. 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
Malfunctions not present are stored in DTC
memory
Necessary functions are not carried out (oxygen
sensor control, actuation of EVAP canister
system, etc.)

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

Indicated on display
- Continue as specified in procedures for specific OBD functions.
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01-11

Code Control Module (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

VAG 1551/ VAG 1552 Scan Tool (ST) with VAG
1551/3 adapter cable

Coding procedure

- Connect VAG 1551/ VAG 1552 Scan Tool (ST)
and press buttons -0- and -1- to insert "Engine
Electronics" address word 01 (ignition switched
on) Page 01
-7 .
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
-13
.
Function is unknown or

If indicated on display:
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cannot be carried out at the moment
Incorrect code number has been entered.
______________________________________________
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01-12

8D0907557 1,8L R4/5VT MOTR HS D02 Coding 06051
WSC 00000

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

Indicated on display
Note:
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 valuesFalse malfunctions stored in DTC memoryReduction in transmission service life
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01-13
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
= ------------
------
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