1996 AUDI A4 engine

01-95


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
Notes:

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
Pa
ge 23 of 43 Readiness code11/22/2002 htt
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01-96

Work step 6: Diagnostic of oxygen sensor
aging before catalytic converter

Test requirement:

Engine continues to run at 2600 RPM.

Display on VAS5051:
Note:
A few minutes may pass until a diagnostic result is reached. -
Press button 4 times to change into display group 034.- Check specified value in display field -4-.
Pa
ge 25 of 43 Readiness code11/22/2002 htt
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yp
e=re
pair&id=AUDI.B5.FU07.01.7

01-97


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
---
Indicated Engine speed
(RPM) Exhaust
temperature Dynamic
factor Diagnostic condition
Functional
range Test OFF
Test ON
B1-S2 OK
B1-S2 not OK
Specified
value 2600 RPM larger than 350
C
0.5 to 2.5 B1-S2 OK
Note



If "B1-S1 not OK" is displayed: Check DTC
memory Page 01
-12
.
If specified value "B1-S1 OK" is obtained:

- Perform next work step.
Pa
ge 26 of 43 Readiness code11/22/2002 htt
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e=re
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01-98

Work step 7: Diagnostic of operational
readiness of oxygen sensor behind catalytic
converter

Test requirement:

Engine continues to run at 2600 RPM.

Display on VAS5051:
-
Press button 2 times to change into display group 036.- Check specified value in display field -2-.
Pa
ge 27 of 43 Readiness code11/22/2002 htt
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yp
e=re
pair&id=AUDI.B5.FU07.01.7

01-100

Work step 8: Diagnostic of oxygen sensor
control system

Test requirement:

Engine continues to run at 2600 RPM.

Display on VAS5051:
-
Press button to change into display group 037.- Check specified value in display field -4-.
Pa
ge 29 of 43 Readiness code11/22/2002 htt
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play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU07.01.7

01-102

Work step 9: Diagnostic of oxygen sensor
aging behind catalytic converter

Test requirement:

Engine continues to run at 2600 RPM.

Display on VAS5051:
-
Click on - button

Display on VAS5051:
1 - Enter display group Max. input value = 255
- Select function "043" in button field -2- for "display group number 043"
and press Q button to confirm input.
Pa
ge 31 of 43 Readiness code11/22/2002 htt
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play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU07.01.7

01-104


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.xxx V
---
Indicated Engine speed
(RPM) Exhaust
temperature Oxygen sensor voltage
Bank 2, sensor 1 Diagnostic condition
Functional
range Test OFF
Test ON
B1-S2 OK
B1-S2 not OK
Specified
value 2600 RPM larger than 350
C
0.100 to 0.950 volts B1-S2 OK
Note



If "B1-S2 not OK" is displayed: Check
DTC memory Page 01
-12

If specified value B1-S2 OK" is obtained:

- Perform next work step.
Pa
ge 33 of 43 Readiness code11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
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yp
e=re
pair&id=AUDI.B5.FU07.01.7

01-105

Work step 10: Diagnostic of catalytic
converter

Test requirement:

Engine continues to run at 2600 RPM.

Display on VAS5051:
Note:
Catalytic converter diagnostic lasts approx. 60 seconds. -
Press button 3 times to change into display group 046.- Check specified values in display fields -2- and -4-.
Pa
ge 34 of 43 Readiness code11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU07.01.7