1997 AUDI A8 AHA Engine On Board Diagnostic Workshop Manual

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:
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cannot be carried out at the moment
Incorrect code number has been entered.
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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
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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
= ------------
------
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01-15

Code number structure (example)





USA vehicle with Leak Detection Pump (LDP): 0 6
Front-wheel-drive without traction control (ASR): 0
Automatic transmission 01V: 5
Audi A4: 1
Code number: 0 6 0 5 1 Note:
Vehicles with traction control (ASR) can be recognized by the ASR control light in the instrument cluster or by ABS/ASR On
Board Diagnostic (OBD).
Repair Manual, Brake System, Repair Group 01
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01-16

Check DTC Memory (scan tool function
02)


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

Checking

- Connect VAG1551/VAG1552 Scan Tool (ST)
and press buttons -0- and -1- to insert "Engine
Electronics" address word 01 (engine running at
idle) page 01
-8 .

Note:
If engine does not start:
- Operate starter to crank engine for approx. 6
seconds, then do not switch ignition off.

- Press PRINT button to switch scan tool printer
on (indicator light in button lights up). Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -2- to select "Check DTC Memory" function 02,
and press -Q- button to confirm input.
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01-17

X DTC reco
gnized

Indicated on display (number of stored malfunctions, or "No DTC
recognized")
Note:
If scan tool displays do not appear as indicated:
Scan tool operating instructions
If one or more malfunctions are stored:
Stored malfunctions are displayed one after another, and are printed out
along with applicable DTCs.
Rapid data transfer
HELP
Select function XX

Indicated on display (after all stored malfunctions)
If no DTCs are recognized:
-
Press button to advance through program sequence.- Press buttons -0- and -6- to select "End Output" function 06, and press
-Q- button to confirm input.
- Repair malfunctions according to Diagnostic Trouble Code (DTC) table
page 01
-18
.
- Erase DTC memory page 01
-49
.
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01-18
Diagnostic Trouble Code (DTC) table

Notes:

The DTC table is organized according to SAE and VAG diagnostic trouble codes.
The column labeled "MIL" specifies the MIL switching condition associated with that DTC.
DTCs that do not switch on the MIL after the malfunction is recognized by the ECM are identified by the MIL switching
condition "Off."
DTCs that do switch on the MIL immediately after the malfunction is recognized by the ECM are identified by the MIL
switching condition "Immed."
DTCs that are recognized by the ECM and switch on the MIL after two consecutive driving cycles (Dcy) are identified by
the MIL switching condition "2 Dcy."
Always correct malfunctions that are designated "immediately" as soon as possible, followed by those malfunctions that
are designated "2 Dcy."
When all repairs have been completed, erase DTC memory ( page 01
-49
) and then generate new readiness code
page 01
-73
.
DTCs that are recognized as a result of intermittent malfunctions, or DTCs that are not erased after repairs, are classified
as sporadic malfunctions. These are identified by the designation "SP" appearing in the display.
A sporadic malfunction will be erased if it no longer occurs after 50 driving cycles during which the engine reaching
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