2000 AUDI A4 AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual

01-241
Notes on display field 3 and 4:
Value "0" = Diagnosis condition not fulfilled
Value "1" = Diagnosis condition fulfilled X
X
X
X
X
X
X
X
Meaning of 8-digit display "Diagnosis condition 1"

1 = Coolant temperature: 70 - 110 C ( display group 001)
2 = Oxygen sensor heating (all four O2S heaters; display group 040)
3 = Momentary constant drive

4 = No fuel enrichment (during diagnosis no enrichment can occur)

5 = Long-term constant drive

6 = Closed throttle position switch open ( display group 002)
7 = Oxygen sensor control, bank 2 active ( display group 008)
8 = Oxygen sensor control, bank 1 active ( display group 007)
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01-242

X
X
X
X
X
X
X
X
Meaning of 8-digit display "Diagnosis Condition 2"

1 = Three way catalytic converter diagnosis, bank 2 active

2 = Engine load: 27 - 66% ( display group 003 )
3 = Engine speed: 1800 - 2700 RPM ( display group 003)
4 = Vehicle speed: 80 - 100 km/h (50 - 63 mph) ( display group 003)
5 = Three way catalytic converter diagnosis, bank 1 active

6 = Value does not drop below or exceed oxygen sensor control limit ( display group 007
and/or 008)
7 = Intake air mass through Mass Air Flow (MAF) sensor: 12 - 36 g/sec ( display group 019)

8 = Calculated exhaust gas temperature in three way catalytic converter: 400 - 640 C (752 -
1184 F)
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01-243
Display group 045
Notes:

Display group 045 is only assigned on vehicles with tank diagnosis.
Vehicles with EVAP system/tank diagnosis can be recognized by Diagnostic Pump for Fuel System -V144-.
Display shows
Display/specified value
Designation
Basic setting 45
1 2 3 4 -------- --------------------------------------
-------- --------------------------------------
-------- --------------------------------------
-------- --------------------------------------
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01-244
Display group 099 Display
shows Display/specified
value Designation/diagnosis
Basic
setting 99
1 2 3 4 ... RPM 1 = Momentary engine speed Display group 003, display field 1 ...% 2 = Momentary engine load display group 003, display field 2
... C
3 = Coolant temperature display group 001, display field 1

-Control OFF
and/or
-Control ON
4 = Oxygen sensor control OFF in "Basic Setting" function 04; Oxygen sensor control
ON in "Read Measuring Value Block" function 08
Notes on display field 4:

For defined troubleshooting, the oxygen sensor control is switched off when display group 099 is selected under "Basic
Setting" function 04, and switched on when display group 099 is selected under "Read Measuring Value Block"function
08. When leaving "Basic Setting" function 04, oxygen sensor control is automatically active again.
You can switch back and forth between "Basic Setting" function 04 and "Read Measuring Value Block" function 08 by
pressing buttons -4- and -8- on the VAG 1551 scan tool.
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01-245

Engine Control Module (ECM), coding


Notes:

During Engine Control Module (ECM)
identification, a 5-digit code must always be
displayed.
Coding is carried out with the VAG 1551 scan
tool.
If coding that corresponds to the vehicle is not
displayed or if the ECM has to be replaced, the
ECM must be coded as follows:

- Connect VAG 1551 scan tool 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.
Rapid data transfer
Q
07 - Code Control Module

Indicated on display
- Press -Q- button to confirm input.
Code control module QEnter code number XXXXX
(0-32000
)

Indicated on display
- Enter code number for vehicle and press -Q- button to confirm input.
Coding variations page 01
-247
.
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______________________________________________
Function is unknown or cannot be carried out at the moment

If the following is indicated on the display:
A non-released code number has been entered.
______________________________________________
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01-246

8D0906266 2.8l V6/2V MPI OBD2
D01
Coding 01051
WSC 06388

ECM identification and entered coding (e.g. 01051) are shown.
-
Press button.
Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -6- to select "End Output" function 06.
Rapid data transfer
Q
06 - End Output

Indicated on display
- Press -Q- button to confirm input.
Rapid data transfer
HELP
Insert address word XX

Indicated on display
Notes:
The ECM uses the coding that is entered and displayed only after the
ignition has been switched off once. Incorrect coding leads to:
Driving performance problems (jerky shifting, rough load change, etc.)Increased fuel consumptionElevated exhaust gas valuesDecrease in transmission service lifeStoring of malfunctions that are not present in DTC memoryFunctions are not carried out (oxygen sensor control, triggering of the
EVAP canister system, etc.).
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01-247
Engine Control Module (ECM), coding variations
Country/exhaust gas
Drive/auxiliary function
Transmission
Vehicle type
00 = ----------------- 0 = Front wheel drive without
traction control 0 = 5-speed manual
transmission 0 = --------------
----
01 = Vehicle with Exhaust Gas
Recirculation (EGR) 1 = Front wheel drive with traction
control 1 = ------------------ 1 = A4
02 = ----------------- 2 = All wheel drive without traction
control 2 = ------------------ 2 = --------------
----
03 = ----------------- 3 = ------------------ 3 = ------------------ 3 = --------------
----
04 = ----------------- 4 = ------------------ 4 = ------------------ 4 = --------------
----
05 = ----------------- 5 = ------------------ 5 = Automatic trans. 01V 5 = --------------
----
06 = ----------------- 6 = ------------------ 6 = ------------------ 6 = --------------
----
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