buttons AUDI A8 1997 D2 / 1.G ATQ Engine Readiness Code User Guide

Input displa
y group number XXX
- Press buttons -0-, -3- and -8- to select "display group number 038"
and press -Q- button to confirm input.
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Work step 9: Diagnostic of oxygen sensor
aging behind catalytic converter

Test requirement

Engine continues to run at 2200 RPM.
Basic Settin
g
Q
Input display group number XXX

When indicated on display:
- Press buttons -0-, -4- and -3- to select "display group number 043" and
press -Q- button to confirm input.
System in Basic Setting 43
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 043: Oxygen sensor aging diagnostic, oxygen sensor behind catalytic converter (bank 1)
Display xxxx/min
xxx C
x.x s
---
Indicated Engine speed
(RPM) Exhaust
temperature Voltage of oxygen sensors
behind catalytic converter,
bank 1 Diagnostic condition
Functional
range 630 to 6800
RPM 70 to 850 C
0.100 to 1.000 V Test OFF
Test ON
B1-S2 OK
B1-S2 not OK
Specified
value 2200 RPM
above 380 C 0.100 to 1.000 V B1-S2 OK
Notes



If "B1-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. Basic Settin
g
Q
Input displa
y group number XXX

When indicated on display:
-
Press buttons -0-, -4- and -4- to select "display group number 044"
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Work step 10: Diagnostic of catalytic
converter

Test requirement

Engine continues to run at 2200 RPM.
Basic Settin
g
Q
Input display group number XXX

When indicated on display:
- Press buttons -0-, -4- and -5- to select "display group number 046" and
press -Q- button to confirm input.
System in Basic Setting 46
1
2
3
4

When indicated on display:
Note:
Catalytic converter diagnostic lasts approx. 60 seconds. - Check specified value in display field 4.
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If specified value "Cat B1 OK" is obtained:

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

When indicated on display:
- Press buttons -0-, -4- and -7- to select "display group number 047" and
press -Q- button to confirm input.
System in Basic Setting 47
1
2
3
4

When indicated on display:
- Check specified value in display field 4.
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Work step 11: Diagnostic of tank ventilation
valve

- Remove the VAG1788/10 RPM adjuster and
leave engine running at idle. Basic Settin
g
Q
Input displa
y group number XXX

When indicated on display:
- Press buttons -0-, -7- and -0- to select "display group number 070" and
press -Q- button to confirm input.
System in Basic Setting 70
1
2
3
4

When indicated on display:
Note:
If test is not initiated or if indication switches from "Test ON" to "Test
OFF", depress accelerator pedal briefly, test will be repeated. - Check specified value in display field 4.
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Work step 12: Diagnostic of tank seal

Test requirements

Engine running at idle:
Intake Air Temperature (IAT) less than 95
C display group 004, display field 4.

Coolant temperature at least 80 C
Display group 4, display field 3

Fuel filler cap opened briefly (to reduce
pressure).
Basic Settin
g
Q
Input displa
y group number XXX

When indicated on display:
- Press buttons -0-, -7- and -1- to select "display group number 071" and
press -Q- button to confirm input.
System in Basic Setting 71
1
2
3
4

When indicated on display:
Notes:
Test lasts approx. 90 seconds.When the diagnostic of tank seal is performed several times in a row,
the fuel filler cap must be opened briefly before each test to release
pressure.
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Work step 13: Diagnostic of Secondary Air
Injection (AIR) system

Test requirement

Engine running at idle:

Note:
During diagnostic of the Secondary Air Injection
(AIR) system, the Secondary Air Injection (AIR)
pump will run for several seconds.
Basic Setting
Q
Input displa
y group number XXX

When indicated on display:
- Press buttons -0-, -7- and -7- to select "display group number 077" and
press -Q- button to confirm input.
System in Basic Setting 77
1
2
3
4

When indicated on display:
Note:
Secondary Air Injection (AIR) system test lasts approx. 60 seconds. - Check specified value in display field 4 after indication "Test ON"
appears:
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