1995 AUDI A4 AHA Engine Readiness Code Workshop Manual

01-89

Notes:
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.
Shut the engine off, start the engine again and
repeat the leak detection test.
Diagnosis conditions for fuel tank leak detection:

Intake Air Temperature (IAT) must be less than
60 C (140 F) display group 4, display field 4
(the temperature can be reduced by opening
the hood).

The throttle valve angle for vehicles with
automatic transmissions must be smaller than
10 display group 3, display field 3

The throttle valve angle for vehicles with
manual transmissions 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
-16
.
If the specified value "Syst. OK" is indicated in
display field 4:
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-
Press button.
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01-90

Step 9: Secondary Air Injection (AIR) system
diagnosis

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

Indicated on display
- Press buttons -0-, -7- and -7- to input display group number 77 (077),
and press -Q- button to confirm input.
System in Basic Setting 77
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. - Let engine continue to run at idle until the specified value "Syst. OK" is
indicated in display field 4.
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01-91


Display fields

1 2 3 4
Display group 77: Secondary air injection system diagnosis
Display xx.x % xx. x %
xx.x C
Test OFF/Test
ON
Syst. OK/
Syst. n.OK
Indicated O2S control deviation during
diagnostics
Bank 1 O2S control deviation during
diagnostics
Bank 2 Coolant
temperature Diagnostic
status
Diagnostic
result
Range --- --- -46.5 to +141.5
C
---
Specified
value --- --- greater than 70.0
C
Syst. OK
If "Syst. n. OK" is indicated in display field 4:

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

-
Press button.
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Step 10: Check readiness code

- Check readiness code page 01
-70
.
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