AUDI A8 1998 D2 / 1.G AEB Engine Readiness Codes
Manufacturer: AUDI, Model Year: 1998, Model line: A8, Model: AUDI A8 1998 D2 / 1.GPages: 22, PDF Size: 0.07 MB
Page 11 of 22
01-68
Step 5: Oxygen Sensor (O2S) control
operating condition Rapid data transfer
HELP
Select function XX
Indicated on display
- Press buttons -0- and -8- to select "Read Measuring Value Block"
function 08, and press -Q- button to confirm input.
Read Measuring Value Block
HELP
Input displa
y group number XXX
Indicated on display
- Press buttons -0-, -3- and -0- to input display group number 30, and
press -Q- button to confirm input.
Read Measuring Value Block 30
1
2
3
4
Indicated on display (1-4 display fields) - Increase engine speed to 1800-2200 RPM.
- Hold at 1800-2200 RPM until:
Specified value of "111" is reached in display field 1
Specified value of "110" is reached in display field 2
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Page 12 of 22
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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Page 13 of 22
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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Page 14 of 22
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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Page 15 of 22
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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Page 16 of 22
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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Page 17 of 22
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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Page 18 of 22
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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Page 19 of 22
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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Page 20 of 22
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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