buttons AUDI A4 1997 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual

an automatic test sequence is carried out (checks DTC memory of all
systems with rapid data transfer).
- Press buttons -0- and -1- to insert the "Engine Electronics" address
word 01.
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01-13

DTC memory, checking and erasing


- Connect VAG 1551 scan tool and operate until
the display shows "Select function XX" page
01
-7 .
Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -2- to select the"Check DTC Memory" function
02.
Rapid data transfer
Q
02 - Check DTC Memor
y

Indicated on display
- Press -Q- button to confirm input.
X DTC reco
gnized

The number of stored Diagnostic Trouble Codes (DTC) or "No DTC
recognized" is shown on the display.
Notes:
No DTC reco
gnized

Note:
If there is a complaint that is not recognized by the On Board Diagnostic
If the printer is switched on, the stored malfunctions will be displayed
and printed out in sequence. If the printer is switched off, the button must be pressed to display
the next malfunction.
-
After the last malfunction is displayed, press the button.
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01-14

Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -5- to select the "Erase DTC Memory" function
05.
Rapid data transfer
Q
05 - Erase DTC Memor
y

Indicated on display
Note:
Every time DTC memory is erased (both with function 05 and with
address word 33, mode 4) the readiness code is erased.
______________________________________________ - Press -Q- button to confirm input.
Caution DTC Memory is not interrogated

If indicated on display
If the ignition was switched off between checking and erasing DTC
memory, then DTC memory is not erased.
______________________________________________ - Comply with work sequence exactly, i.e. first check DTC memory.
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Note:
After pressing the HELP button, an overview of the possible functions is
printed out.
- Press buttons -0- and -3- to select "Output Diagnostic Test Mode"
function 03.
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01-153

- Check and erase DTC memory page 01
-
13
.

There must be no malfunctions stored (if
necessary repair malfunction, erase DTC
memory and test drive, switch engine off and
start again, test drive and, as a check, check
DTC memory again).

Note:
The readiness code is erased each time the DTC
memory is erased (either with function 05 or with
Mode 4).

- After checking and erasing DTC memory, let
engine continue to run at idle.
Rapid data transfer
HELP
Select function XX

Indicated on display
Note:
When the HELP button is pressed, an overview of possible functions is
printed out.
- Press buttons -0- and -4- to select "Basic Setting" function 04.
Rapid data transfer
Q
04 - Basic Setting

Indicated on display
- Press Q-button to confirm input.
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01-154

- Select the desired display group number
according to the following display group
overview and press -Q- button to confirm input.

Note:
Display group 001 is used as an example to
show the sequence.

- Press buttons -0-, -0- and -1- to input display
group no. 001. Initiate basic settin
g
Q
Input display group number
01

Indicated on display
- Press -Q- button to confirm input.
Basic setting 1 1 2 3 4

Indicated on display
To change to a different display group, proceed as follows: Display group
VAG 1551 scan tool
VAG 1552 scan tool
Higher Press button -3-
Press button Lower Press button -1-
Press button Skip Press -C- button Press -C- button
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01-155

Notes:

The values in display fields 1 to 10 are shown in
decimal format in display group 000.
In the "Basic Setting" display, the current 3-digit
display group number is shown without the first
zero. In display groups 000 to 009, the number
is shown without the first two zeroes.
If the printer is switched on, the current display
will be printed out on the paper strip.
Each time the PRINT button is pressed, the
current display will be printed out.
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.
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01-188
Test table display group 009 Display fields
Display on VAG 1551 scan tool
Malfunction cause
Malfunction repair
1 -
- Display group 007, display field 1
2 -
- Display group 008, display field 13 -
- Note4 -
- Display group 003, display field 3
Notes on display field 3:

The evaporative emissions valve (EVAP canister valve) is closed during the learning process.
The effect of the EVAP canister can be evaluated by comparing the display value during "Basic setting" (EVAP canister
completely closed: 99%) and during "Read Measuring Value Block" (EVAP canister valve completely open: 0%).
You can switch back and forth between "Basic Setting" function 04 and "Read Measuring Value Block" function 08 by
pressing buttons -1- and -3- on VAG 1551 scan tool.
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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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