catalytic converter AUDI A4 2000 B5 / 1.G APB Engine Motronic Syst

01-120

Work step 8: Diagnosis oxygen sensor aging
before catalytic converter

Test requirements

Engine running at 1900 - 2200 RPM
System in Basic Settin
g
Q
Input display group number XXX

Indicated on display
- Press buttons -0-, -3- and -4- to select "display group number 034" and
confirm with -Q- button.
System in Basic Setting 34
1
2
3
4

Indicated on display
- Check specified value in display field 4:
Pa
ge 146 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-121


Display fields

1 2 3 4
Display group 034: Oxygen sensor aging before catalytic converter (bank 1)
Display xxxx/RPM
xxx C
x.x seconds
Test ON
Indicated Engine speed
(RPM) Exhaust
temperature Period duration of oxygen
sensor before CAT Diagnostic condition
Work range 0 - 6800/RPM
70 - 850 C
0.0 - 3.0 Seconds
Test OFF
Test ON
B1-S1 OK
B1-S1 not OK
Specified
value 1900 -
2200/RPM Greater than 260
C 0.1 - 1.0 Seconds
B1-S1 OK
Note



If "B1-S1 not OK" is displayed: Check
DTC memory Page 01
-15
.
If specified value of "B1-S1 OK" is reached:

- Press -C- button.

Test requirements

Engine running at 1900 - 2200 RPM
Pa
ge 147 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-122


Display fields

1 2 3 4
Display group 035: Oxygen sensor aging before catalytic converter (Bank 2)
Display xxxx/RPM
xxx C
x.x seconds
Test ON
Indicated Engine speed
(RPM) Exhaust
temperature Period duration of
oxygen sensor
before TWC Diagnostic condition
Work range 0 - 6800/RPM
70 - 850 C
0.0 - 3.0 Seconds
Test OFF
Test ON
B2-S1 OK
B2-S1 not OK
Specified
value 1900 -
2200/RPM greater than 260
C 0.1 - 1.0 Seconds
B2-S1 OK
Note



IF "B2-S1 not OK" is displayed: Check DTC
memory Page 01
-15
.
If specified value of "B2-S1 OK" is reached:

- Press -C- button.
Pa
ge 149 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-128

Work step 11: Diagnosis of oxygen sensor
aging behind catalytic converter

Test requirements

Engine running at 1900 - 2200 RPM
System in Basic Settin
g
Q
Input display group number XXX

Indicated on display
- Press buttons -0-, -4- and -3- to select "display group number 043" and
confirm input with -Q- button.
System in Basic Setting 43
1
2
3
4

Indicated on display
- Check specified value in display field 4.
Pa
ge 156 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-131

Work step 12: Diagnosis of catalytic
converter

Test requirements

Engine running at 1900 - 2200 RPM
System in Basic Settin
g
Q
Input display group number XXX

Indicated on display
- Press buttons -0-, -4- and -6- to select "display group number 046" and
confirm input with -Q- button.
System in Basic Setting 46
1
2
3
4

Indicated on display
Note:
The test duration for catalytic converter diagnosis takes approx.: 60
seconds. - Check specified value in display field 4.
Pa
ge 160 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-132


Display fields

1 2 3 4
Display group 046: Diagnostic of catalytic converter (Bank 1)
Display xxxx/RPM
xxx C
x.x s
---
Indicated Engine speed
(RPM) Catalyst
temperature Catalytic
converter
conversion Diagnostic condition
Work
range 0 - 6800/RPM
70 - 850 C
0.0 - 0.99
Test OFF
Test ON
Cat B1 OK
Cat B1 not OK
Specified
value 1900 -
2200/RPM greater than
350 C 0.0 - 0.80
Cat B1 OK
Note



If "Cat B1 not OK" is displayed: Check DTC
memory Page 01
-15
. If no malfunction is stored
replace catalytic converter.
If the specified value "Cat B1 OK" is reached:

- Press -C- button

Engine running at 1900 - 2200 RPM
Pa
ge 161 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-133


Display fields

1 2 3 4
Display group 047: Diagnostic of catalytic converter (Bank 2)
Display xxxx/RPM
xxx C
x.x seconds
---
Indicated Engine speed
(RPM) Catalyst
temperature Catalytic
converter
conversion Diagnostic condition
Work range 0 - 6800/RPM
70 - 850 C 0.0 - 0.99
Test OFF
Test ON
Cat B2 OK
Cat B2 not OK
Specified
value 1900 -
2200/RPM greater than
350 C 0.0 - 0.80
Cat B2 OK
Note



If "Cat B2 not OK" is displayed: Check DTC memory
Page 01
-15
. If no malfunction is stored replace
catalytic converter.
If the specified value "Cat B2 OK" is reached:

- Press -C- button
Pa
ge 163 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1