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

01-68

Readiness code is returned to"0 1 1 0 1 1 0 1"
if:

DTC memory was erased,
Voltage supply to ECM was cut off (e.g.
connector disconnected, battery disconnected)
a new Engine Control Module (ECM) was
installed
In this case, the readiness code must be re-
generated Page 01
-73
.

Note:
During driving operation in various load
conditions, exhaust relevant tests are performed
by the control module and the readiness code is
generated on its own. In this case, however, the
concluding control possibilities are not available,
meaning that it will not be indicated whether the
vehicle is free of malfunctions upon transfer to
the customer.
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01-77


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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01-79


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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01-80

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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01-81


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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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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01-85


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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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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Display fields

1 2 3 4
Display group 046: Diagnostic of catalytic converter (bank 1)
Display xxxx/min
xxx C
x.x
---
Indicated Engine speed
(RPM) Exhaust
temperature Measurement
Catalytic converter -
conversion Diagnostic condition
Functional
range Test OFF
Test ON
Cat B1 OK
Cat B1 not OK
Specified
value 2000 RPM more than
430 C
0.0 to 0.2 Cat B1 OK
Note



If "Cat B1 not OK" is displayed: Check DTC
memory Page 01
-16
. If no DTCs are stored,
replace catalytic converter.
If specified value "Cat B1 OK" is obtained:

- Press -C- button.
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01-91


Display fields

1 2 3 4
Display group 077: Secondary Air Injection (AIR) system diagnostic (Bank 1)
Display xxxx/min xx.x g/s xx.x g/s
---
Indicated Engine speed
(RPM) Air
mass Air mass Secondary air
system Diagnostic condition
Functional
range
Test OFF
Test ON
System OK
System not OK
Aborted
Specified
value FWD: 740 to 860
RPM
AWD: 800 to 920
RPM 2 to 5
g/s 4 to 10 g/s 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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