2000 AUDI A4 engine

01-72


Display fields

1 2 3 4
Display group 34: Oxygen sensor aging (time period of oxygen sensor)
Display xxxx RPM xx.xx ms xx.xx s Test OFF/Test ON
B1-S1 OK/B1-S1 n.
OK
Indicated Engine speed (increments of
40 RPM) Engine
load Time period of Heated Oxygen Sensor
(O2S) before TWC Diagnostic status
Diagnostic result
Range 0-6800 RPM 0.00-8.50
ms 0.00-5.00 s ---
Specified
value 1800-2200 RPM 0.80-2.00
ms 0.00-3.30 s B1-S1 OK If "B1-S1 n. OK" is indicated in display field 4:

- Check DTC memory Page 01
-15
.
If the specified value "B1-S1 OK" is indicated in
display field 4:

- Continue to hold engine speed at 1800-2200
RPM.

- Press -C- button.
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01-73

Step 7: Three Way Catalytic Converter (TWC)
diagnosis Initiate basic setting
HELP
Input display group number XXX

Indicated on display
- Press buttons -0-, -4- and -6- to input display group number 46, and
press -Q- button to confirm input.
System in Basic Setting 46
1
2
3
4

Indicated on display (1-4 display fields)
Note:
The test time for TWC diagnosis is approx. 60 seconds. - Hold engine speed at 1800-2200 RPM until display changes from "Test
OFF" to "Test ON" in display field 4.
- Continue to hold at 1800-2200 RPM until specified value "Cat B1 OK"
is indicated in display field 4.
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01-75

Step 8: Evaporative Emissions (EVAP)
system and fuel tank leak detection

Note:
During this diagnosis there should be no engine
load, otherwise the diagnosis is interrupted and
can only be restarted after a period of
acceleration.

- Start engine and let run at idle.Initiate basic settin
g
HELP
Input displa
y group number XXX

Indicated on display
- Press buttons -0-, -7- and -0- to input display group number 70, and
press -Q- button to confirm input.
System in Basic Setting 70
1
2
3
4

Indicated on display (1-4 display fields)
If the diagnosis is initiated by the ECM, the display changes from "Test
OFF" to "Test ON" in display field 4.
Note:
If the display changes from "Test ON" to "Test OFF" during the diagnosis,
briefly accelerate the engine to reset and repeat the test. - Let engine continue to run at idle until the specified value "EVAP OK" is
indicated in display field 4.
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01-77

Initiate basic setting 71
1
2
3
4

Indicated on display (1-4 display fields)
If the diagnosis is initiated by the ECM, the display changes from "Test
OFF" to "Test ON" in display field 4. - Start engine and let run at idle.
- Let engine continue to run at idle until the specified value "Syst. OK" is
indicated in display field 4.

Display fields

1 2 3 4
Display group 71: Fuel tank leak detection
Display Reed op.
Reed cl. Small leak/large leak
determination Syst.Test
Measurement
Measurement end Test OFF/Test ON
Syst. OK
Syst. n.OK
Indicated Status: Reed contact Error message System status Diagnostic status
Diagnostic result
Range --- --- --- ---
Specified value Reed op. --- Measurement end Syst. OK
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01-78

Note:
If display field 4 changes from "Test ON" to "Test
OFF" and "Abort" appears in display field 2,
repeat the diagnosis of fuel tank leak detection.
Repeating the diagnosis can take up to approx.
60 seconds until the display changes from "Test
OFF" to "Test ON"in display field 4.
Diagnosis conditions for fuel tank leak detection:

Intake Air Temperature (IAT) must be less than
90 C (194 F) Display group 4, display field
4

Engine Coolant Temperature (ECT) must be
less than 95 C (203 F) Display group 4,
display field 3

Throttle valve angle must be smaller than 10
Display group 3, display field 3
If "SYST. n. OK" is indicated in display field 4:

- Check DTC memory Page 01
-15
.
If the specified value "SYST. OK" is indicated in
display field 4:

-
Press button to advance program
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