AUDI A4 1999 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual

01-252

- If the specified values are obtained in all display
fields, 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
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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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01-255

Test box VAG 1598/19, connecting


CAUTION!

Wait at least 30 seconds after the ignition has
been switched off before disconnecting the
ECM harness connector.

Note:
By disconnecting the ECM, the permanent
voltage supply is disconnected and therefore the
learning values, DTC memory and readiness
code are erased.

- Switch ignition off.

- Remove ECM.

Note:
Terminal assignments of the connectors A, B, C, D and E are identical to
the socket assignments of the test box. - Connect test box VAG 1598/19 to wiring harness.
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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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01-258

Generating readiness code

Notes:

In order to generate the readiness code, a
"mixed city and highway" drive (short test) has
to be taken. A "mixed city and highway" drive is
understood as approx. 1-1/2 to 5 minutes at 80-
100 km/h (50-63 mph) with manual
transmission in 4th or 5th gear, or automatic
transmission selector lever in "D" position,
preferably in 4th gear.
If a malfunction is recognized and stored by the
engine control module during a "mixed city and
highway" trip, and/or the Malfunction Indicator
Lamp (MIL) is switched on, the brief test can be
interrupted by the technician and the
malfunction repaired according to the diagnostic
trouble code.
If the readiness code has to be generated, the
DTC memory should be checked (no faults
should be stored) and erased (readiness code
will be reset) before taking the "mixed city and
highway" trip.
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01-259

Step 1: Preparation

- Start engine and let idle.

- Connect VAG 1551 or VAG 1552 scan tool,
switch on printer and select address word 01 (
page 01
-7 )

- Check and erase DTC memory ( page 01
-
13
).

No malfunctions may be stored. If necessary:

- Repair malfunctions.

- Erase DTC memory.

- Stop engine and start again.

- Test drive and, as a check, check and erase
DTC memory again.

- After checking and erasing DTC memory, let
engine run at idle again.
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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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