check engine AUDI TT 1999 8N / 1.G ATW Engine Readiness Code User Guide

01-89


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.
Pa
ge 28 of 35 Readiness code11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.01.8

01-90

Work step 10: Diagnostic of Secondary Air
Injection (AIR) system

- Remove VAG1788/10 RPM adjuster and leave
engine running at idle.

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 Settin
g
Q
Enter 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
- Check specified value in display field 4:
Pa
ge 29 of 35 Readiness code11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.01.8

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.
Pa
ge 30 of 35 Readiness code11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.01.8

01-92

Work step 11: Diagnostic of tank ventilation
valve

Test requirement:

Engine running at idle:
Basic Settin
g
Q
Enter display 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:
Pa
ge 31 of 35 Readiness code11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.01.8

01-94

Work step 12: Diagnostic of tank seal

Test requirements:

Engine running at idle:
Fuel filler cap opened briefly (to reduce
pressure).
Basic Settin
g
Q
Enter display 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
Note:
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.
- Check specified value in display field 4:
Pa
ge 33 of 35 Readiness code11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.01.8