1997 AUDI A4 display

01-69


Display fields

1 2 3 4
Display group 30: Oxygen Sensor (O2S) control operating condition
Display xxx xxx
Indicated Status of Heated Oxygen Sensor (HO2S), bank 1,
before TWC (B1-S1) Status of Heated Oxygen Sensor (HO2S), bank
1, after TWC (B1-S2)
Specified
value 111 110 ---
---


Evaluation Page 01
-70

Evaluation Page 01
-70


If the specified values are not indicated:

- Check DTC memory Page 01
-15
.
If the specified values are indicated in display
fields 1 and 2:

- Continue to hold engine speed at 1800-2200
RPM.
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01-70

Explanation of 3-digit value in display fields 1
and 2

When display = 1
1
2
3

1 Oxygen Sensor (O2S) control active
1 Heated Oxygen Sensor (HO2S)
operational
1 Oxygen Sensor (O2S) heater ON

Note:
O2S control for bank 1 Oxygen Sensor (O2S)
after Three Way Catalytic Converter (TWC), B1-
S2), is not active at idle.
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01-71

Step 6: Oxygen sensor aging (time period)

- Press -4- button to select "Basic Setting"
function 04.

- Press -3- button four times to advance to display
group number 34. System in Basic Setting 34
1
2
3
4

Indicated on display (1-4 display fields) - 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 "B1-S1. OK"
is indicated in display field 4.
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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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01-74


Display fields

1 2 3 4
Display group 46: Three Way Catalytic Converter (TWC) diagnosis
Display x.xx x xx.x s Test OFF/Test ON
Cat B1 OK
Cat B1 n. OK
Indicated Amplitude ratio Exceeded diagnosis range Test time of TWC diagnosis Diagnostic status
Diagnostic result
Range 0.00-1.00 0-9 00.0-60.0 ---
Specified value 0.00-0.10 0-2 60.0 s Cat B1 OK If "Cat B1 n. OK" is indicated in display field 4:

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

- Press -C- button.
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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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01-76


Display fields

1 2 3 4
Display group 70: Evaporative Emissions (EVAP) canister purge regulator valve
Display xxx% xx.x % xx.xx g/s Test
OFF/Test ON
EVAP OK
EVAP n. OK
Indicated Opening of EVAP canister purge
regulator valve during diagnosis Oxygen sensor control
deviation during diagnosis Oxygen sensor control
deviation during diagnosis Diagnostic
status
Diagnostic
result
Range 0-100 % -25.0 to 25.0 % -2.70 to 4.16 g/s ---
Specified
value 0-100 % - 5.4 to 9.4 % 0.00 to 0.33 g/s EVAP OK If "EVAP n. OK" is indicated in display field 4:

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

- Press -3- button to input display group number
71.
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