buttons AUDI A4 1999 B5 / 1.G ATW Engine Oxygen Sensor Control Workshop Manual

24-72

Test requirements:

Exhaust system free of leaks.
Coolant Temperature at least 80 C.

Test sequence

- Connect VAS5051 tester or VAG1551 scan tool
and select control module for engine electronics
using "address word" 01 Page 01
-10
. Engine
must run at idle.
Rapid data transfer
HELP
Select function XX

When indicated on display
- Press buttons -0- and -4- to select "Initiate basic setting" and press -Q-
button to confirm input.
Basic Settin
g
Q
Enter displa
y group number XXX

When indicated on display
Note: - Press buttons -0-, -3- and -0- to select "display group number 030" and
press -Q- button to confirm input.
- Check specified value in display field 1.
Increase engine speed to obtain specified values faster. "Oxygen sensor status" indicates status of oxygen sensor control and
oxygen sensors.
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- Do not start test until indication in display field 1
has reached "111" at least once.

Checking oxygen sensor adaptation values
and control

- Press -C- button.Basic Settin
g
Q
Enter displa
y group number XXX

When indicated on display
- Press buttons -0-, -3- and -2- to select "display group number 032" and
press -Q- button to confirm input.
System in basic setting 32
1
2
3
4

When indicated on display
- Check oxygen sensor values in display fields 1 and 2:
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Display fields

1 2 3 4
Display group 036: Oxygen sensor adaptation values
Display
xx.x %
xx.x %


Indicated
Oxygen sensor adaptation value Bank 1,
sensor 1at idle (additive) Oxygen sensor adaptation value Bank 1, sensor
1at partial throttle(multiple)
Specified
value -10.0 to 10.0 %
can fluctuate slightly -10.0 to 10.0 %
can fluctuate slightly


Note
If specified value is not obtained Page 24
-78




- Press -C- button.Basic Settin
g
Q
Enter display group number XXX

When indicated on display
- Press buttons -0-, -3- and -3- to select "display group number 033" and
press -Q- button to confirm input.
System in basic setting 33
1
2
3
4

When indicated on display
- Check oxygen sensor control in display fields 1 and 2.
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Test sequence

- Connect VAS5051 tester or VAG1551 scan tool
and select control module for engine electronics
using "address word" 01 Page 01
-10
. Engine
must run at idle.
Rapid data transfer
HELP
Select function XX

When indicated on display
- Press buttons -0- and -4- to select "Initiate basic setting" and press -Q-
button to confirm input.
Basic Settin
g
Q
Enter displa
y group number XXX

When indicated on display
- Press buttons -0-, -3- and -4- to select "display group number 034" and
press -Q- button to confirm input.
System in basic setting 34
1
2
3
4

When indicated on display
Note:
This process can take a few minutes. - Use VAG1788/10 RPM adjuster to adjust engine speed to between
1800 and 2200 RPM.
- Check specified value in display field 4:
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24-89

Test requirements:

Road test performed and DTC memory
erased.
Coolant Temperature at least 80 C.

Test sequence

- Connect VAS5051 tester or VAG1551 scan tool
and select control module for engine electronics
using "address word" 01 Page 01
-10
. Engine
must run at idle.
Rapid data transfer
HELP
Select function XX

When indicated on display
Note:
During basic setting, the Evaporative Emission (EVAP) canister purge
regulator valve (EVAP valve -N80-) is closed and the A/C compressor is
switched off - Press buttons -0- and -4- to select "Initiate basic setting" and press -Q-
button to confirm input.
Basic Settin
g
Q
Enter displa
y group number XXX

When indicated on display
- Press buttons -0-, -3- and -4- to select "display group number 034" and
press -Q- button to confirm input.
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24-90

System in basic setting 34
1
2
3
4

When indicated on display
Note:
This process can take a few minutes. - Use VAG1788/10 RPM adjuster to adjust engine speed to between
2800 and 3200 RPM.
- Continue test as soon as display field 2 indicates an exhaust
temperature of more than 350 C. - Press -C- button.
- Use VAG1788/10 RPM adjuster to adjust engine speed to between
1800 and 2200 RPM.
Basic Setting
Q
Enter displa
y group number XXX

When indicated on display
- Press buttons -0-, -3- and -0- to select "display group number 030" and
press -Q- button to confirm input.
System in basic setting 30
1
2
3
4

When indicated on display
Note:
"Oxygen sensor status" indicates status of oxygen sensor control and
oxygen sensor. - Check oxygen sensor status for oxygen sensor behind catalytic
converter in display field 2.
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Checking oxygen sensor control behind
catalytic converter

- Press -C- button.Basic Setting
Q
Enter displa
y 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 oxygen sensor voltage in display field 2.
- Check dwell time of oxygen sensor control before catalytic converter in
display field 3 and diagnostic result in display field 4.
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