air condition AUDI A8 1999 D2 / 1.G ATQ Engine Readiness Code Workshop Manual

01-77

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

DTC memory was erased,
a new Engine Control Module (ECM) was
installed
In this case, readiness code must be re-
generated Page 01
-82
.

Note:
During driving operation in various load
conditions, exhaust relevant tests are performed
by the control module within a "short trip" and
readiness code is generated on its own. In this
case, however, concluding control possibilities
are not available, meaning that it will not be
indicated whether all positions of the readiness
code are set to "0".
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01-86


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 100 % 0 to 100 %
0 to 8
ADP in progress
ADP OK
ADP ERROR
Specified
value 3 to 93 % 97 to 3 %
8
ADP OK
Notes


After adaptation, the adaptation step
counter reaches the number 8 (it is OK for
numbers to be skipped). If "ADP ERROR." is displayed:
Check DTC memory Page
01
-15
.
If specified value is not
obtained: Note, page
Page 24
-147
.
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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01-88


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 0 to 100 % 0 to 50 %
Kick
down operate
ADP in progress
ADP OK
ADP ERROR
Specified value 12 to 97 % 4 to 49 %
Kick
down ADP OK
Notes



If "ADP ERROR." is displayed: Check DTC memory
Page 01
-15
.
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.
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01-89

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 the
accelerator pedal and raise the engine speed.


Specification: 2200 RPM
Basic Settin
g
Q
Input displa
y 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:
A few minutes may pass until a diagnostic result is reached. - Check oxygen sensor status in display fields 1 to 4.
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01-90


Display fields

1 2 3 4
Display group 030: Oxygen sensor status with engine at idle
Display
X X X
X X X
X X X
X X X
Indicated
Oxygen sensor status,
bank 1, sensor 1 Oxygen sensor status,
bank 2, sensor 1 Oxygen sensor status,
bank 2, sensor 1 Oxygen sensor status,
bank 2, sensor 2
Functional
range 0 = off
1 = on 0 = off
1 = on 0 = off
1 = on 0 = off
1 = on
Specified
value 1 1 1
1 1 0
1 1 1
1 1 0 Significance of 3 digit indications in display group 030 X
X
X
Display fields 1 to 4
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 heating
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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 630 to 6800
RPM 70 to 850 C
0 to 3.0 s Test OFF
Test ON
B1-S2 OK
B1-S2 not OK
Specified
value 2200 RPM
above 380 C 0.1 to 1.8 s B1-S2 OK
Notes



If "B1-S1 not OK" is displayed: Check Diagnostic
Trouble Code (DTC) memory Page 01
-15

If specified value "B1-S1 OK" is obtained:

- Press -C- button.Basic Setting
Q
Input display group number XXX

When indicated on display:
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01-93
If specified value "B2-S1 OK" is obtained:
System in Basic Setting 35
1
2
3
4

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

Display fields

1 2 3 4
Display group 035: Oxygen sensor aging diagnostic, oxygen sensor before catalytic converter (bank 2)
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 630 to 6800
RPM 70 to 850 C
0 to 3.0 s Test OFF
Test ON
B2-S2 OK
B2-S2 not OK
Specified
value 2200 RPM
above 380 C 0.1 to 1.8 s B2-S2 OK
Notes



If "B2-S1 not OK" is displayed: Check Diagnostic
Trouble Code (DTC) memory Page 01
-15

- Press -C- button.
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01-95


Display fields

1 2 3 4
Display group 036: Operational readiness of the oxygen sensor behind catalytic converter (bank 1 and bank 2)
Display x.xxx V
--- x.xxx V
---
Indicated Voltage of oxygen
sensors behind
catalytic converter,
bank 1 Diagnostic condition Voltage of oxygen
sensors behind
catalytic converter,
bank 2 Diagnostic condition
Functional
range 0.100 to 1.000 V
Test OFF
Test ON
B1-S2 OK
B1-S2 not OK 0.100 to 1.000 V
Test OFF
Test ON
B2-S2 OK
B2-S2 not OK
Specified
value smaller than 0.4 V
or
larger than 0.5 V B1-S2 OK smaller than 0.4 V
or
larger than 0.5 V B2-S2 OK
Notes

If "B1-S2 not OK" is
displayed: Check Diagnostic
Trouble Code (DTC) memory
Page 01
-15


If "B2-S2 not OK" is
displayed: Check Diagnostic
Trouble Code (DTC) memory
Page 01
-15

If specified value "B1-S1 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 Voltage of oxygen sensors
behind catalytic converter,
bank 1 Oxygen sensor
correction value
between sensor 1
and sensor 2 (bank
1) Diagnostic condition
Functional
range 12 to
100 % 0.100 to 1.000 V -800 to 800 ms
Test OFF
Test ON
System OK
System not OK
Specified
value 12 to 26
% 0.100 to 1.000 V -800 to 800 ms System OK
Notes



If "System not OK" is displayed: Check
Diagnostic Trouble Code (DTC) memory
Page 01
-15

If specified value "Syst. OK" is obtained:

- Press -C- button. Basic Settin
g
Q

When indicated on display:
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01-98
If specified value "Syst. OK" is obtained:
System in Basic Setting 34
1
2
3
4

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

Display fields

1 2 3 4
Display group 038: Diagnostic of oxygen sensor control system (Bank 2)
Display xxx % x.xxx volts xxx ms
---
Indicated Load Voltage of oxygen sensors
behind catalytic converter,
bank 2 Oxygen sensor
correction value
between sensor 2
and sensor 2 (bank
1) Diagnostic condition
Functional
range 12 to
100 % 0.100 to 1.000 V -800 to 800 ms
Test OFF
Test ON
System OK
System not OK
Specified
value 12 to 26
% 0.100 to 1.000 V -800 to 800 ms System OK
Notes



If "System not OK" is displayed: Check
Diagnostic Trouble Code (DTC) memory
Page 01
-15

- Press -C- button.
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