sensor AUDI TT 2000 8N / 1.G ATW Engine Readiness Code Workshop Manual

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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Display fields

1 2 3 4
Display group 060: Adaptation of throttle valve control module
Display xx % xx %
x
---
Indicated Throttle
valve angle
(angle
sensor 1) Throttle
valve angle
(angle
sensor 2) Adaptation step counter
Adaptation condition
Functional
range
0 to 8
ADP in progress
ADP OK
ERROR
Specified
value 3 to 93 % 97 to 3 %
8
ADP OK
Note


After adaptation, the adaptation step
counter reaches the number 8 (it is OK for
numbers to be skipped). If "ERROR." is displayed:
Check DTC memory Page
01
-16
.
If specified value is not
obtained: Note, Page 24
-
126

Note for display field 3:
Different numbers are shown in display field 3 during adaptation that represent the current adaptation condition. It is not
particularly important how the adaptation step counter (display field 3) behaves during adaptation, but rather that display field
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Display fields

1 2 3 4
Display group 063: Kick down function, adapting
Display xx % xx %
Kick
down ---
Indicated Sensor 1 for
Pedal
position Sensor 2 for
Pedal
position Kick
down Adaptation condition
Functional
range
Kick
down operate
ADP in progress
ADP OK
ERROR
Specified value 12 to 97 % 4 to 49 %
Kick
down ADP OK
Note



If "ERROR." is displayed: Check DTC memory Page
01
-16
.
Note for display field 4:
"ERROR" can be indicated, for example, if the accelerator pedal is not immediately pressed in response to a request by the
tester or if the accelerator pedal is released while adaptation is running despite the fact that adaptation is not yet complete. In
both cases, "Basic Setting" must be exited and the adaptation must be performed again.
If specified value "ADP OK" is obtained:
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Work step 5: Check operating condition of
oxygen sensor control

- Start engine (for a vehicle with manual
transmission: engage clutch).

Note:
After starting engine, it may be necessary to
select the Engine Control Module (ECM) again
using "address word" 01 and the function "Initiate
basic setting" using "04".

- Install VAG1788/10 RPM adjuster on accelerator
pedal and raise engine speed to 2000 RPM.

Test requirement:

Engine running at 2000 RPM.
Basic Setting
Q
Enter display group number XXX

When indicated on display
- Press buttons -0-, -3- and -0- to select "display group number 030" and
press -Q- button to confirm input.
System in basic setting 30
1
2
3
4

When indicated on display
Note: - Check oxygen sensor status in display fields 1 and 2.
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Display fields

1 2 3 4
Display group 030: Oxygen sensor status
Display
X X X
X X X


Indicated
Oxygen sensor status, bank 1, sensor 1
Oxygen sensor status, bank 2, sensor 1


Functional range
0 = off
1 = on 0 = off
1 = on

Specified value
1 1 1
1 1 0

Significance of 3 digit indications in display group 030 X
X
X
Display fields 1 and 2
X Oxygen sensor control: 0= not active; 1 = active
X Operational readiness of oxygen sensor: 0= not active; 1 = active
X Condition of oxygen sensor heater: 0= not active; 1 = active
Note:

The first position of the 3 digit indication (heating) fluctuates between 0 and 1 at certain operation points.
Oxygen sensor control of oxygen sensor behind catalytic converter (bank 1, sensor 2) is not active without engine load,
meaning that the third position of the 3-digit display is 0.

-
Do not start test until indication in display field 1
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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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