air condition AUDI A4 1999 B5 / 1.G APB Engine Motronic Syst

01-119


Display fields

1 2 3 4
Display group 042: Oxygen sensor heater, bank 1
Display
xxx kOhm
Heater before before CAT
ON xxx kOhm
Heater before behind CAT
ON
Indicated
Bank 1, Sensor 1
Condition of heater
Bank 1, Sensor 2
Condition of heater
Work range
Heater b. CAT ON
Heater b. TWC OFF
Heater a. CAT ON
Heater a. CAT OFF
Specified
value 0 - 0.5 kOhm
Heater b. CAT ON/OFF
0 - 0.9 kOhm
Heater a. CAT ON/OFF
Note
Observe note
below
Observe note
below Important note for display fields 1,2,3 and 4:

Display fields 1 and 3 will not indicate any value if the operating temperature of the oxygen sensors is not reached, that
means both fields are empty. (Increase Engine Speed to reach specified value).
After the operating temperature is reached, the display fields 1 and 3 must display a value of less than 0.5K Ohm
Only proceed with test after value of less than 0.5K Ohm is displayed with in display fields 1 and 3.
Pa
ge 144 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

The Engine Control Module (ECM) cycles at certain operating conditions the oxygen sensor heating, that means, the
heater is certain operating conditions ON or OFF. It is therefore possible that the specification in display field 2 and 4
appears periodically as "Heater b. CAT OFF" or "Heater a. CAT OFF"

- Press -C- button.
Pa
ge 145 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

01-124


Display fields

1 2 3 4
Display group 036: Operational readiness of oxygen sensors behind TWC (Bank 1 and Bank 2)
Display x.xxx Volt
Test ON x.xxx Volt
Test ON
Indicated Voltage of
oxygen
sensor behind
TWC, bank 1 Diagnostic condition Voltage of
oxygen
sensor behind
TWC, bank 2 Diagnostic condition
Work
range 0.000V - 1.000
Volt Test OFF
Test ON
B1-S2 OK
B1-S2 not OK 0.000V -
1.000Volt Test OFF
Test ON
B2-S2 OK
B2-S2 not OK
Value less than 0.4
Volt or
greater than 0.5
Volt B1-S2 OK less than 0.4 Volt
or
greater than 0.5
Volt B2-S2 OK
Note

IF "B1-S2 not OK" is displayed:
Check DTC Memory Page 01
-
15
.

If "B2-S2 not OK" is displayed:
Check DTC memory Page 01
-
15
.
If the specified value in display field 2 "B1-S2
OK" and in display field 4 "B2-S2 OK" is
reached:
Pa
ge 151 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

01-126


Display fields

1 2 3 4
Display group 037: Oxygen sensor control system (Bank 1)
Display xx.x % x.xxx Volt xxx ms
Test ON
Indicated Load Voltage of oxygen
sensor behind
TWC, bank 1 Correction value
between oxygen sensors 1
and 2, bank 1 Diagnostic condition
Work range 0 - 175 % 0.000 - 1.000 Volt ---
Test OFF
Test ON
Syst. OK
Syst. not OK
Specified
value 13.5 -
25.0 % 0.000 - 1.000 Volt -500ms to 800ms
Syst. OK
Note

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

- Press -C- button.

- Press buttons -0-, -3- and -8- to select "display
group number 038" and confirm input with -Q-
button.
Pa
ge 154 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

01-127


Display fields

1 2 3 4
Display group 038: Oxygen sensor control system (Bank 2)
Display xx.x % x.xxx Volt xxx ms
Test ON
Indicated Load Voltage of oxygen
sensor behind TWC,
bank 2 Correction value
between oxygen
sensors 1 and 2,
bank 2 Diagnostic condition
Work
range 0 - 175 % 0.000 - 1.000 Volt ---
Test OFF
Test ON
Syst. OK
Syst. not OK
Value 13.5 - 25.0
% 0.000 - 1.000 Volt -500ms to 800ms
Syst. OK
Note

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

- Press -C- button.
Pa
ge 155 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

01-129


Display fields

1 2 3 4
Display group 043: Oxygen sensor aging oxygen sensor behind TWC (Bank 1)
Display xxxx/RPM
xxx C
x.xxx V
Test ON
Indicated Engine speed
(RPM) Catalyst
temperature Voltage of oxygen
sensor behind TWC
Bank 1 Diagnostic condition
Work range 0 - 6800/RPM
70 - 850 C
0.000 - 1.000 Volt
Test OFF
Test ON
B1-S2 OK
B1-S2 not OK
Specified
value 1900 -
2200/RPM greater than 320
C 0.000 - 1.000 Volt
B1-S2 OK
Note



If "B1-S2 not OK" is displayed: Check DTC
memory Page 01
-15
.
If specified value of "B1-S2 OK" is reached:

- Press -C- button.

Test requirements

Engine running at 1900 - 2200 RPM
Pa
ge 157 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

01-130


Display fields

1 2 3 4
Display group 044: Oxygen sensor aging oxygen sensor behind TWC (Bank 2)
Display xxxx/RPM
xxx C
x.xxx Volt
Test ON
Indicated Engine speed
(RPM) Catalyst
temperature Voltage of oxygen
sensor behind TWC
Bank 2 Diagnostic condition
Work range 0 - 6800/RPM
70 - 850 C
0.000 - 1.000 Volt Test OFF
Test ON
B2-S2 OK
B2-S2 not OK
Specified
value 1900 -
2200/RPM greater than 320
C 0.000 - 1.000 Volt B2-S2 OK
Note



If "B2-S2 not OK" is displayed: Check DTC
memory Page 01
-15
.
If specified value of "B2-S2 OK" is reached:

- Press -C- button.
Pa
ge 159 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