buttons AUDI A4 2000 B5 / 1.G ATQ Engine Oxygen Sensor Control Checking

24-105

Checking oxygen sensor control behind
catalytic converter

- Perform a test drive of approx. 10 minutes.

WARNING!

Observe safety precautions to reduce the risk
of accidents during road test Page 24
-1 .

- Let engine continue to run at idle.Basic Setting
Q
Input 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 between oxygen sensor 1 before catalytic converter
and oxygen sensor 2 behind catalytic converter in display field 3 and
diagnostic result in display field 4.
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24-107

- Press -C- button.

- Press buttons -0-, -3- and -8- to select "display
group number 038" and press -Q- button to
confirm input. System in Basic Setting 38
1
2
3
4

When indicated on display:
Note:
The test in display group 038 is activated simultaneously with the test in
display group 037 Therefore the test result is indicated immediately after
display group 038 is selected. - Check specified value in display field 4.
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24-117

Note:
The heating circuit of the oxygen sensor is
monitored by On Board Diagnostic (OBD),
Check DTC memory Page 01
-15
.

- Connect VAS5051 tester or VAG1551 scan tool
and select the control module for engine
electronics using "address word" 01 Page 01
-
9 .

Engine must run at idle for this.Rapid data transfer
HELP
Select function XX

When indicated on display:
- Press buttons -0- and -8- to select "Read Measuring Value Block" and
press -Q- button to confirm input.
Read Measurin
g Value Block
Q
Input displa
y group number XXX

When indicated on display:
- Press buttons -0-, -4- and -1- to select "display group number 041" and
press -Q- button to confirm input.
Read Measuring Value Block 41
1
2
3
4

When indicated on display:
Note:
Increasing engine speed accelerates the obtaining of specified values. - Check specified values in display fields 1 and 3.
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Read Measurin
g Value Block
Q
Input display group number XXX

When indicated on display:
- Press buttons -0-, -4- and -2- to select "display group number 042" and press -Q-
button to confirm input.
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11/23/2002 htt
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play?action=Goto&t
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pair&id=AUDI.B5.FU05.24.3