catalytic converter AUDI A4 1997 B5 / 1.G AHA Engine Readiness Code Workshop Manual

01-72
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
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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Step 7: Three Way Catalytic Converter (TWC)
diagnosis Basic Setting
HELP
Input display group number XXX

Indicated on display
- Press buttons -0-, -4- and -6- to input display group number 46 (046),
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), Bank 1 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 0.00-0.26 0-2 60.0 s Cat B1 OK If "Cat B1 n. OK" is indicated in display field 4:

- Check DTC memory page 01
-16
.
If specified value "Cat B1 OK" is indicated in
display field 4:

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

- Press button -3- once to advance to display
group number 47.
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- 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 B2 OK" is indicated in
display field 4.

Note:
The test time for TWC diagnosis is approx. 60
seconds.

Display fields

1 2 3 4
Display group 47: Three Way Catalytic Converter (TWC), Bank 2 diagnosis
Display x.xx x xx.x s Test OFF/Test ON
Cat B2 OK/
Cat B2 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 0.00-0.26 0-2 60.0 s Cat B2 OK
Pa
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play?action=Goto&t
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pair&id=AUDI.B5.FU03.01.2