display AUDI A4 1998 B5 / 1.G ATQ Engine Readiness Code Owner's Manual

01-95


Display fields

1 2 3 4
Display group 036: Operational readiness of the oxygen sensor behind catalytic converter (bank 1 and bank 2)
Display x.xxx V
--- x.xxx V
---
Indicated Voltage of oxygen
sensors behind
catalytic converter,
bank 1 Diagnostic condition Voltage of oxygen
sensors behind
catalytic converter,
bank 2 Diagnostic condition
Functional
range 0.100 to 1.000 V
Test OFF
Test ON
B1-S2 OK
B1-S2 not OK 0.100 to 1.000 V
Test OFF
Test ON
B2-S2 OK
B2-S2 not OK
Specified
value smaller than 0.4 V
or
larger than 0.5 V B1-S2 OK smaller than 0.4 V
or
larger than 0.5 V B2-S2 OK
Notes

If "B1-S2 not OK" is
displayed: Check Diagnostic
Trouble Code (DTC) memory
Page 01
-15


If "B2-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.
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01-96

Work step 8: Diagnostic of oxygen sensor
control system

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-, -3- and -7- to select "display group number 037" and
press -Q- button to confirm input.
System in Basic Setting 37
1
2
3
4

When indicated on display:
- Check specified value in display field 4.
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01-97


Display fields

1 2 3 4
Display group 037: Diagnostic of oxygen sensor control system (Bank 1)
Display xxx % x.xxx volts xxx ms
---
Indicated Load Voltage of oxygen sensors
behind catalytic converter,
bank 1 Oxygen sensor
correction value
between sensor 1
and sensor 2 (bank
1) Diagnostic condition
Functional
range 12 to
100 % 0.100 to 1.000 V -800 to 800 ms
Test OFF
Test ON
System OK
System not OK
Specified
value 12 to 26
% 0.100 to 1.000 V -800 to 800 ms System OK
Notes



If "System not OK" is displayed: Check
Diagnostic Trouble Code (DTC) memory
Page 01
-15

If specified value "Syst. OK" is obtained:

- Press -C- button. Basic Settin
g
Q

When indicated on display:
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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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01-98
If specified value "Syst. OK" is obtained:
System in Basic Setting 34
1
2
3
4

When indicated on display:
- Check specified value in display field 4.

Display fields

1 2 3 4
Display group 038: Diagnostic of oxygen sensor control system (Bank 2)
Display xxx % x.xxx volts xxx ms
---
Indicated Load Voltage of oxygen sensors
behind catalytic converter,
bank 2 Oxygen sensor
correction value
between sensor 2
and sensor 2 (bank
1) Diagnostic condition
Functional
range 12 to
100 % 0.100 to 1.000 V -800 to 800 ms
Test OFF
Test ON
System OK
System not OK
Specified
value 12 to 26
% 0.100 to 1.000 V -800 to 800 ms System OK
Notes



If "System not OK" is displayed: Check
Diagnostic Trouble Code (DTC) memory
Page 01
-15

- Press -C- button.
Pa
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01-99

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.
Pa
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01-100


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"
Pa
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01-101
If specified value B2-S2 OK" is obtained:
System in Basic Setting 44
1
2
3
4

When indicated on display:
- Check specified value in display field 4.

Display fields

1 2 3 4
Display group 044: Oxygen sensor aging diagnostic, oxygen sensor behind catalytic converter (bank 2)
Display xxxx/min
xxx C
x.x s
---
Indicated Engine speed
(RPM) Exhaust
temperature Voltage of oxygen sensors
behind catalytic converter,
bank 2 Diagnostic condition
Functional
range 630 to 6800
RPM 70 to 850 C
0.100 to 1.000 V Test OFF
Test ON
B2-S2 OK
B2-S2 not OK
Specified
value 2200 RPM
above 380 C 0.100 to 1.000 V B2-S2 OK
Notes



If "B2-S2 not OK" is displayed: Check
Diagnostic Trouble Code (DTC) memory
Page 01
-15

- Press -C- button.
Pa
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01-102

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.
Pa
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01-103


Display fields

1 2 3 4
Display group 046: Diagnostic of catalytic converter (bank 1)
Display xxxx/min
xxx C
x.x s
---
Indicated Engine
speed
(RPM) Exhaust
temperature Catalytic
converter -
conversion Diagnostic condition
Functional
range 630 to 6800
RPM 70 to 850 C
0.00 to 0.99 Test OFF
Test ON
Cat B1 OK
Cat B1 not OK
Specified
value 2200 RPM
above 420 C 0.00 to 0.52

1)

0.00 to 0.47

2)
Cat B1 OK
Notes



If "Cat B1 not OK" is displayed: Check Diagnostic
Trouble Code (DTC) memory Page 01
-15
. If no DTCs
are stored, replace catalytic converter.
1) Manual transmission 2) Automatic transmission
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