display AUDI A4 1996 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual

01-253

Read Individual Measuring Values (scan
tool function 09)


Note:
The function "Read Individual Measuring Values"
can be selected with buttons -0- and -9-.
However, no display fields can be selected or
information displayed since for OBD II the ECM
does not currently carry out function 09.
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01-254

Adaptation (scan tool function 10)


Note:
The function "Adaptation" is selected with
buttons -1- and -0-. Display groups 001 and 002
can be called with function 10. If the stored
adaptation value is changed in display group 001
and/or display group 002 by input of another
adaptation value, this has no effect on the fuel
injection and ignition system.
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01-256

Readiness code, reading and generating


Note:
OBD II legal regulations require a display
(readiness code) that shows inspection
readiness for the annual exhaust emissions test.
The readiness code shows that every component
and/or system that affects exhaust emissions,
which can lead to the MIL switching on, has been
operated at least once with positive results.

Note:
The readiness code is reset and/or erased every
time:

DTC memory is erased (either with display
group 01 function 05 or display group 33 mode
4)
ECM harness connector is disconnected from
ECM -J192- (e.g. connecting test box VAG
1598/19, replacing ECM, etc.)
Battery is disconnected
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01-257

Reading readiness code

- Select VAG 1551 "Read Measuring Value Block"
function 08, display group 029 page 01
-249
.

Note:
The readiness code can be displayed with the
VAG 1551 and/or VAG 1552 scan tools, and also
with address word 33, mode 1 (Diagnosis data). Read measuring value block 29 1 2 3 4

Display shows display fields 1 through 4.
Note:
The readiness code is set as soon as all display positions is display field 1
are "0."
If the readiness code is not set: - Read readiness code in display field 1.
Specified value: 000_00_0
-
Press button.- Press buttons -0- and -6- to select "End Output" function 06, and press
-Q- button to confirm input.
- Generate readiness code page 01
-258
.
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01-260

Step 2: System readiness checking and
creating

- Select VAG 1551 "Read Measuring Value Block"
function 08, display group 29 page 01
-249
.
Read measuring value block 29 1 2 3 4

Display shows display fields 1 through 4. Specified values:
Display field 1: 111_01_1 (readiness code)Display field 2: 00000000 (trip status display)Display field 3: 0Display field 4: 0
-
Press button.
Read measuring value block Input displa
y group number XXX

Indicated on display
- Push buttons -0-, -0- and -1- to input display group number 001.
- Press -Q- button to confirm input.
Read measuring value block 1 1 2 3 4

Display shows display fields 1 through 4.
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01-261

- Check display fields 1 and 3:

Display
field Designation
Specified
value
1 Coolant
temperature Greater than
70 C
3 Altitude display Less than 48

Note on display field 1:

If the displayed value is less than 70 C, let the
vehicle warm up until at least 70 C coolant
temperature is attained.
Note on display field 3:
If the displayed value is greater than 48
(corresponds to an altitude of approx. 1800 m) a
diagnosis of the exhaust return can not be
conducted due to altitude. Setting the readiness
code at this altitude is not possible.
If specified values are attained Step 3
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01-263

Step 4: Checking readiness code

- Select VAG 1551 "Read Measuring Value Block"
function 08, display group 29 page 01
-249
.
Read measuring value block 29 1 2 3 4

Display shows display fields 1 through 4. Specified values:
Display field 1: 000_00_0 (readiness code)Display field 2: 111_01_1 (trip status display)Display field 3: 0Display field 4: 0
-
Press button.
- Press buttons -0- and -6- to select "End Output" function 06, and press
-Q- button to confirm input.
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01-264
If, during regeneration of the readiness code, the
trip status display is set to "1" but the
corresponding readiness code display is not set
to "0" the diagnosis was carried out but not
recognized as OK by the ECM.
In this case, DTC memory should be checked for
malfunctions and/or to carry out a selective
diagnosis:

- For three way catalytic convertor diagnosis
(bank 1 and bank 2), also check display groups
035, 036 and 044.

- For EVAP system leak diagnosis, also check
display group 030.

- For heated oxygen sensor diagnosis, also check
display groups 032, 033, 034, 041, 042 and 043.

- For oxygen sensor heating diagnosis, also
check display group 040.

- For Exhaust Gas Recirculation (EGR)
throughput diagnosis, also check display group
017.
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01-265

Engine Control Module (ECM), replacing


Notes:

By disconnecting the ECM, the permanent
voltage supply is disconnected and therefore
the learning values, DTC memory and
readiness code are erased.
If uneven idle occurs after the ECM is installed,
let the engine idle for a few minutes so that the
learning process can be carried out page 01
-
150
, Basic Setting, display groups 007 and/or
008.
If the engine control module is replaced, carry
out the following work steps in the specified
sequence.

- Switch ignition on.

- Connect VAG 1551 scan tool and operate until
control module identification is displayed page
01
-7 .
8D0906266 2.8l V6/2V MPI OBD2
D01
Codin
g 01051
WSC 06388

ECM identification and the coding are shown on the display.
- Print out ECM identification and compare coding to table of coding
variations page 01
-247
.
-
Press button.
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Rapid data transfer
HELP
Select function XX

Indicated on display
- Switch ignition off.
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