1997 AUDI A4 ESP

01-234

Display
shows Display specified
value Designation/diagnosis
Basic setting
42
1 2 3 4 400 - 640 C
1 = Calculated exhaust gas temperature in front of three way catalytic converter
(calculated value inside control module)
X X X X X X X X 2 = Diagnosis status and/or result
X X X X X X X X 3 = Diagnostic conditions 1 for heated oxygen sensor diagnosis (response time of
heated oxygen sensor)
X X X X X X X X 4 = Diagnostic conditions 2 for heated oxygen sensor diagnosis (response time of
heated oxygen sensor)
Note on display field 2:
If after diagnosis all 8 displays are "1" and the engine is stopped and started again, display values 1 and 2 are reset to "0" and
values 3 to 8 remain at "1." If during the trip diagnostic conditions (display fields 3 and 4) are achieved, display values 1 and 2
are set to "1" (diagnosis active) and display values 3 to 8 are set to"0".
Value "0": Diagnosis not active and/or diagnosis not finished and/or diagnosis result not OK
Value "1": Diagnosis active and/or diagnosis finished (whether OK or not OK) and/or diagnosis result OK X
X
X
X
X
X
X
X
Meaning of 8-digit "Diagnosis status and/or result"

1 = Diagnosis, bank 1 active

2 = Diagnosis, bank 2 active

3 = Diagnosis, bank 1 finished

4 = Diagnosis result, bank 1, flank fall time
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01-237
Display group 043 [Current flank rise and/or flank fall time (response time) of voltage signal of heated oxygen
sensors in front of three way catalytic converters]
Notes:

When diagnostic conditions are fulfilled ( display group 042) display group 043 shows the current flank rise and/or flank
fall times. After diagnosis is ended, the diagnostic times shown are those that were recognized when the most recent
diagnosis was carried out. If the limit values (flank rise time 90 ms/flank fall time 85 ms) are exceeded, the diagnosis is recognized as not OK. The
flank rise and/or flank fall times now continue to be checked, while the display values in display group 034 are
incremented with each additional test. However, the limit values can also be exceeded because of combustion misfiring
being recognized. In this case, the malfunction "Bank X probe Y signal too slow" is not stored in DTC memory, but" Cyl. x
Combustion misfiring recognized" is stored.
Display shows
Display specified value
Designation/diagnosis
Basic setting 43
1 2 3 4 0.0 - 260.0 ms 1 = Flank rise time, bank 1, heated oxygen sensor 1
(limit value: 90 ms)
0.0 - 260.0 ms 2 = Flank fall time, bank 1, heated oxygen sensor 1
(limit value: 85 ms)
0.0 - 260.0 ms 3 = Flank rise time, bank 2, heated oxygen sensor 1
(limit value: 90 ms)
0.0 - 260.0 ms 4 = Flank fall time, bank 2, heated oxygen sensor 1
(limit value: 85 ms)
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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
.
Pa
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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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01-264
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.
Pa
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) - Multi
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)
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yp
e=re
pair&id=AUDI.B5.FU01.01.1