1999 AUDI A8 catalytic converter

01-61
If the readiness code was not generated,
generate readiness code again Page 01
-62
.

- Check readiness code Page 01
-59
. If DTC
memory has been erased, or ECM has been
disconnected from B+, generate readiness code
again Page 01
-62
.
Explanation of 8-digit readiness code Readiness code is generated only when all display values = 0 1
2
3
4
5
6
7
8
Diagnosis
0 Three Way Catalytic Converter (TWC)
0 TWC heating (not applicable / always "0")
0 EVAP system and fuel tank leak detection test
0 Secondary Air Injection (AIR) system (not applicable / always "0")
0 Air conditioning system (diagnosis not applicable / always "0")
0 Oxygen Sensor (O2S) control
0 Oxygen Sensor (O2S) heating
0 Exhaust Gas Recirculation (EGR) system (not applicable / always "0")
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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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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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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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ge 17 of 22 Readiness code11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU02.01.2