diagnostic AUDI A3 1998 8L / 1.G ATW Engine Readiness Code Workshop Manual

01-67


Readiness code
The readiness code appears as an 8-digit display
in measuring value block 086, display field 1.
Each of the 8 digits is allocated to a specific
exhaust related system.
During a test sequence which must be performed
completely, On Board Diagnostic (OBD) checks
the function of each of these systems and then
changes the character assigned to it in the 8-digit
indication from "1" to "0" once test has been
performed successfully.
When the readiness code is generated after a
successfully completed test sequence, it reads "0
0 0 0 0 0 0 0" (measuring value block 086,
display field 1).
If a single test is completed entirely, but indicated
as "not OK", a DTC will be stored in DTC
memory. Check DTC Memory Page 01
-16
.
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Display fields

1 2 3 4
Display group 086: Readiness code
Display
0 0 0 0 0 0 0 0 X X X X X X X X X X X X X X X X

Indicated
Ready-Bits
completed tests individual tests carried out individual tests carried out
Functional range
1 = not completed
0 = completed 1 = not completed
0 = completed 1 = not completed
0 = completed
Specified value
0 0 0 0 0 0 0 0 X X X X X X X X X X X X X X X X
Note
Significance of readiness code Page 01
-71


Note for display field 1:
Display field 1 is the most important. This indicates which system was checked via On Board Diagnostic (OBD) since the last
time DTC memory was erased or a new control module was implemented. Once DTC memory is erased, all testable values
are set to "1", after the test is performed successfully, the values are set to "0".
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01-71

X
X
X
X
X
X
X
X
Notes for display group 086, display field 1



Diagnostic of catalytic converter

Indication 0 = test was performed
Indication 1 = test was not performed (generate readiness code Page 01
-73
)





Indication always 0




EVAP system

Indication 0 = test was performed
Indication 1 = test was not performed (generate readiness code Page 01
-73
)






Secondary air system

Indication 0 = test was performed
Indication 1 = test was not performed (generate readiness code Page 01
-73
)



Indication always 0







Oxygen sensors

Indication 0 = test was performed
Indication 1 = test was not performed (generate readiness code Page 01
-73
)


Oxygen sensor heating

Indication 0 = test was performed
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A few minutes may pass until a diagnostic result is reached.
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01-82

Work step 6: Diagnostic of oxygen sensor
aging before catalytic converter

Test requirement:

Engine continues to run at 2000 RPM.
Basic Settin
g
Q
Enter display group number XXX

When indicated on display
- Press buttons -0-, -3- and -4- to select "display group number 034" and
press -Q- button to confirm input.
System in basic setting 34
1
2
3
4

When indicated on display
Note:
A few minutes may pass until a diagnostic result is reached. - Check specified value in display field 4:
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Display fields

1 2 3 4
Display group 034: Oxygen sensor aging diagnostic, oxygen sensor before catalytic converter (bank 1)
Display xxxx/min
xxx C
x.x s
---
Indicated Engine speed
(RPM) Exhaust
temperature Period duration Oxygen sensor
before Catalytic converter Diagnostic condition
Functional
range Test OFF
Test ON
B1-S2 OK
B1-S2 not OK
Specified
value 2000 RPM more than 350
C
0.0 to 1.0 s B1-S2 OK
Note



If "B1-S1 not OK" is displayed:
Check DTC memory Page 01
-16
.
If specified value "B1-S1 OK" is obtained:

- Press -C- button.
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Work step 7: Diagnostic of operational
readiness of oxygen sensor behind catalytic
converter

Test requirement:

Engine continues to run at 2000 RPM.
Basic Setting
Q
Enter displa
y group number XXX

When indicated on display
- Press buttons -0-, -3- and -6- to select "display group number 036" and
press -Q- button to confirm input.
System in basic setting 36
1
2
3
4

When indicated on display
- Check specified value in display field 2:
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Display fields

1 2 3 4
Display group 036: Operational readiness of oxygen sensor behind catalytic converter (bank 1)
Display x.xxx V
---

Indicated Oxygen sensor voltage Bank 2,
sensor 1 Diagnostic condition

Functional
range
Test OFF
Test ON
B1-S2 OK
B1-S2 not OK

Specified value 0.100 to 0.950 V
B1-S2 OK

Note

If "B1-S2 not OK" is displayed: Check DTC memory
Page 01
-16



If specified value B1-S2 OK" is obtained:

- Press -C- button.
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01-86

Work step 8: Diagnostic of oxygen sensor
control system

Test requirement:

Engine continues to run at 2000 RPM.
Basic Settin
g
Q
Enter display group number XXX

When indicated on display
- Press buttons -0-, -3- and -7- to select "display group number 037" and
press -Q- button to confirm input.
System in basic setting 37
1
2
3
4

When indicated on display
- Check specified value in display field 4:
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Display fields

1 2 3 4
Display group 037: Diagnostic of oxygen sensor control system (Bank 1)
Display xxx % x.xxx volts xxx ms
---
Indicated Load Oxygen sensor
voltage Bank 2,
sensor 1 Oxygen sensor correction value
between bank 1, sensor 1 and bank 1,
sensor 2 Diagnostic condition
Functional
range
Test OFF
Test ON
System OK
System not OK
Specified
value 12 to
30 % 0.100 to 0.950 V -150 to 150 ms System OK
Note



If "System not OK" is displayed:
Check DTC memory Page 01
-
16

If specified value "Syst. OK" is obtained:

- Press -C- button.
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