check engine AUDI A4 1995 B5 / 1.G AEB Engine Readiness Codes

01-59


Readiness code

Readiness code, checking


Note:
The readiness code will be erased:

When Diagnostic Trouble Code (DTC) memory
is erased
When the Engine Control Module (ECM)
harness connector is disconnected (e.g. to
connect VAG 1598/22 test box)
When the battery is disconnected

Required special tools and test equipment
VAG 1551 Scan Tool (ST) with adapter cable
VAG 1551/3

Checking

- Connect VAG 1551/ VAG 1552 Scan Tool (ST)
and press buttons -0- and -1- to insert "Engine
Electronics" address word 01 (with ignition
switched on) Page 01
-7 .
Rapid data transfer
HELP

Indicated on display
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Step 1: Check DTC memory Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -2- to select the "Check DTC Memory" function
02, and press -Q- button to confirm input.
No DTC reco
gnized

Indicated on display
If one or more DTCs are stored:
If no DTCs were recognized: - Repair cause of malfunction.
- Erase DTC memory.
- Stop engine, start engine again, and road test.
- Check DTC memory again and erase.
-
Press button to advance program sequence.
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Display fields

1 2 3 4
Display group 60: Adaptation of throttle valve control module to Engine Control Module (ECM)
Display
xxx
xxx
Idle
Part throt.
Full throt.
Decel
Enrich ADP.runs
ADP. OK
ADP.ERROR
Indicated Throttle valve angle Throttle valve actuator angle Operational status Adaptation status
Specified value --- --- Idle ADP. OK
If "ADP. ERROR" is indicated in display field 4:

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

-
Press button to advance program
sequence.
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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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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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Note:
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.
Repeating the diagnosis can take up to approx.
60 seconds until the display changes from "Test
OFF" to "Test ON"in display field 4.
Diagnosis conditions for fuel tank leak detection:

Intake Air Temperature (IAT) must be less than
90 C (194 F) Display group 4, display field
4

Engine Coolant Temperature (ECT) must be
less than 95 C (203 F) Display group 4,
display field 3

Throttle valve angle 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
-15
.
If the specified value "SYST. OK" is indicated in
display field 4:

-
Press button to advance program
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